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exchangers</title> <meta name="description" content="Search results for: ground heat exchangers"> <meta name="keywords" content="ground heat exchangers"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="ground heat exchangers"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 4963</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: ground heat exchangers</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4963</span> Thermal Properties of the Ground in Cyprus and Their Correlations and Effect on the Efficiency of Ground Heat Exchangers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20A.%20Florides">G. A. Florides</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Theofanous"> E. Theofanous</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Iosif-Stylianou"> I. Iosif-Stylianou</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20Christodoulides"> P. Christodoulides</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Kalogirou"> S. Kalogirou</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Messarites"> V. Messarites</a>, <a href="https://publications.waset.org/abstracts/search?q=Z.%20Zomeni"> Z. Zomeni</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Tsiolakis"> E. Tsiolakis</a>, <a href="https://publications.waset.org/abstracts/search?q=P.%20D.%20Pouloupatis"> P. D. Pouloupatis</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20P.%20Panayiotou"> G. P. Panayiotou</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Ground Coupled Heat Pumps (GCHPs) exploit effectively the heat capacity of the ground, with the use of Ground Heat Exchangers (GHE). Depending on the mode of operation of the GCHPs, GHEs dissipate or absorb heat from the ground. For sizing the GHE the thermal properties of the ground need to be known. This paper gives information about the density, thermal conductivity, specific heat and thermal diffusivity of various lithologies encountered in Cyprus with various relations between these properties being examined through comparison and modeling. The results show that the most important correlation is the one encountered between thermal conductivity and thermal diffusivity with both properties showing similar response to the inlet and outlet flow temperature of vertical and horizontal heat exchangers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=ground%20heat%20exchangers" title="ground heat exchangers">ground heat exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=ground%20thermal%20conductivity" title=" ground thermal conductivity"> ground thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=ground%20thermal%20diffusivity" title=" ground thermal diffusivity"> ground thermal diffusivity</a>, <a href="https://publications.waset.org/abstracts/search?q=ground%20thermal%20properties" title=" ground thermal properties"> ground thermal properties</a> </p> <a href="https://publications.waset.org/abstracts/2459/thermal-properties-of-the-ground-in-cyprus-and-their-correlations-and-effect-on-the-efficiency-of-ground-heat-exchangers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2459.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">380</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4962</span> Effect of the Fluid Temperature on the Crude Oil Fouling in the Heat Exchangers of Algiers Refinery</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rima%20Harche">Rima Harche</a>, <a href="https://publications.waset.org/abstracts/search?q=Abdelkader%20Mouheb"> Abdelkader Mouheb</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The Algiers refinery as all the other refineries always suffers from the problem of stopping of the tubes of heat exchanger. For that a study experimental of this phenomenon was undertaken in site on the cell of heat exchangers E101 (E101 CBA and E101 EDF) intended for the heating of the crude before its fractionation, which are exposed to the problem of the fouling on the side tubes exchangers. It is of tube-calenders type with head floating. Each cell is made up of three heat exchangers, laid out in series. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fouling" title="fouling">fouling</a>, <a href="https://publications.waset.org/abstracts/search?q=fluid%20temperatue" title=" fluid temperatue "> fluid temperatue </a>, <a href="https://publications.waset.org/abstracts/search?q=oil" title=" oil"> oil</a>, <a href="https://publications.waset.org/abstracts/search?q=tubular%20heat%20exchanger" title=" tubular heat exchanger"> tubular heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=fouling%20resistance" title=" fouling resistance"> fouling resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=modeling" title=" modeling"> modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer%20coefficient" title=" heat transfer coefficient"> heat transfer coefficient</a> </p> <a href="https://publications.waset.org/abstracts/17999/effect-of-the-fluid-temperature-on-the-crude-oil-fouling-in-the-heat-exchangers-of-algiers-refinery" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17999.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">432</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4961</span> Fouling Mitigation Using Helical Baffle Heat Exchangers and Comparative Analysis Using HTRI Xchanger Suite® Educational Software </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kiran%20P.%20Chadayamuri">Kiran P. Chadayamuri</a>, <a href="https://publications.waset.org/abstracts/search?q=Saransh%20Bagdi"> Saransh Bagdi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Heat exchangers are devices used to transfer heat from one fluid to another via convection and conduction. The need for effective heat transfer has made their presence vital in hundreds of industries including petroleum refineries, petrochemical plants, fertiliser plants and pharmaceutical companies. Fouling has been one of the major problems hindering efficient transfer of thermal energy in heat exchangers. Several design changes have been coined for fighting fouling. A recent development involves using helical baffles in place of conventional segmented baffles in shell and tube heat exchangers. The aim of this paper is to understand the advantages of helical baffle exchangers, how they aid in fouling mitigation and its corresponding limitations. A comparative analysis was conducted between a helical baffle heat exchanger and a conventional segmented baffle heat exchanger using HTRI Xchanger Suite® Educational software and conclusions were drawn to study how the heat transfer process differs in the two cases. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title="heat transfer">heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchangers" title=" heat exchangers"> heat exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=fouling%20mitigation" title=" fouling mitigation"> fouling mitigation</a>, <a href="https://publications.waset.org/abstracts/search?q=helical%20baffles" title=" helical baffles"> helical baffles</a> </p> <a href="https://publications.waset.org/abstracts/49858/fouling-mitigation-using-helical-baffle-heat-exchangers-and-comparative-analysis-using-htri-xchanger-suite-educational-software" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49858.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">328</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4960</span> Determination of Flow Arrangement for Optimum Performance in Heat Exchangers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20Salisu%20Atiku">Ahmed Salisu Atiku</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This task involves the determination of the flow arrangement for optimum performance and the calculation of total heat transfer of two identical double pipe heat exchangers in series. The inner pipe contains the cold water stream at 27°C, whilst the outer pipe contains the two hot stream of water at 50°C and 90 °C which can be mixed in any way desired. The analysis was carried out using counter flow arrangement due to its good heat transfer ability. The best way of heating this cold stream was found out to be passing the 90°C hot stream through the two heat exchangers. The outlet temperature of the cold stream was found to be 39.6°C and overall heat transfer of 131.3 kW. Though starting with 50°C hot stream in the first heat exchanger followed by 90°C hot stream in the second heat exchanger gives an outlet temperature almost the same as 90°C hot stream alone, but the heat transfer is low. The reason for the low heat transfer was that only the heat transfer in the second heat exchanger is considered. Whilst the reason behind high outlet temperature was that the cold stream was already preheated by the first stream. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cold%20stream" title="cold stream">cold stream</a>, <a href="https://publications.waset.org/abstracts/search?q=flow%20arrangement" title=" flow arrangement"> flow arrangement</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger" title=" heat exchanger"> heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=hot%20stream" title=" hot stream"> hot stream</a> </p> <a href="https://publications.waset.org/abstracts/51973/determination-of-flow-arrangement-for-optimum-performance-in-heat-exchangers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/51973.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">323</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4959</span> Study of Heat Exchangers in Small Modular Reactors</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Harish%20Aryal">Harish Aryal</a>, <a href="https://publications.waset.org/abstracts/search?q=Roger%20Hague"> Roger Hague</a>, <a href="https://publications.waset.org/abstracts/search?q=Daniel%20Sotelo"> Daniel Sotelo</a>, <a href="https://publications.waset.org/abstracts/search?q=Felipe%20Astete%20Salinas"> Felipe Astete Salinas</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents a comparative study of different coolants, materials, and temperatures that can affect the effectiveness of heat exchangers that are used in small modular reactors. The corrugated plate heat exchangers were chosen out of different plate options for testing purposes because of their ease of access and better performance than other existing heat exchangers in recent years. SolidWorks enables us to see various results between water coolants and helium coolants acting upon different types of conducting metals, which were selected from different fluids that ultimately satisfied accessibility requirements and were compatible with the software. Though not every element, material, fluid, or method was used in the testing phase, their purpose is to help further research that is to come since the innovation of nuclear power is the future. The tests that were performed are to help better understand the constant necessities that are seen in heat exchangers and through every adjustment see what the breaking points or improvements in the machine are. Depending on consumers and researchers, the results may give further feedback as to show why different types of materials and fluids would be preferred and why it is necessary to keep failures to improve future research. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20exchangers" title="heat exchangers">heat exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=Solidworks" title=" Solidworks"> Solidworks</a>, <a href="https://publications.waset.org/abstracts/search?q=coolants" title=" coolants"> coolants</a>, <a href="https://publications.waset.org/abstracts/search?q=small%20modular%20reactors" title=" small modular reactors"> small modular reactors</a>, <a href="https://publications.waset.org/abstracts/search?q=nuclear%20power" title=" nuclear power"> nuclear power</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofluids" title=" nanofluids"> nanofluids</a>, <a href="https://publications.waset.org/abstracts/search?q=Nusselt%20number" title=" Nusselt number"> Nusselt number</a>, <a href="https://publications.waset.org/abstracts/search?q=friction%20factor" title=" friction factor"> friction factor</a>, <a href="https://publications.waset.org/abstracts/search?q=Reynolds%20number" title=" Reynolds number"> Reynolds number</a> </p> <a href="https://publications.waset.org/abstracts/167626/study-of-heat-exchangers-in-small-modular-reactors" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/167626.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">73</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4958</span> Numerical Prediction of Entropy Generation in Heat Exchangers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nadia%20Allouache">Nadia Allouache</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The concept of second law is assumed to be important to optimize the energy losses in heat exchangers. The present study is devoted to the numerical prediction of entropy generation due to heat transfer and friction in a double tube heat exchanger partly or fully filled with a porous medium. The goal of this work is to find the optimal conditions that allow minimizing entropy generation. For this purpose, numerical modeling based on the control volume method is used to describe the flow and heat transfer phenomena in the fluid and the porous medium. Effects of the porous layer thickness, its permeability, and the effective thermal conductivity have been investigated. Unexpectedly, the fully porous heat exchanger yields a lower entropy generation than the partly porous case or the fluid case even if the friction increases the entropy generation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20exchangers" title="heat exchangers">heat exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=porous%20medium" title=" porous medium"> porous medium</a>, <a href="https://publications.waset.org/abstracts/search?q=second%20law%20approach" title=" second law approach"> second law approach</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulent%20flow" title=" turbulent flow"> turbulent flow</a> </p> <a href="https://publications.waset.org/abstracts/63531/numerical-prediction-of-entropy-generation-in-heat-exchangers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63531.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">300</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4957</span> Thermal and Hydraulic Design of Shell and Tube Heat Exchangers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmed%20R.%20Ballil">Ahmed R. Ballil</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Heat exchangers are devices used to transfer heat between two fluids. These devices are utilized in many engineering and industrial applications such as heating, cooling, condensation and boiling processes. The fluids might be in direct contact (mixed), or they separated by a solid wall to avoid mixing. In the present paper, interactive computer-aided design of shell and tube heat exchangers is developed using Visual Basic computer code as a framework. This design is based on the Bell-Delaware method, which is one of the very well known methods reported in the literature for the design of shell and tube heat exchangers. Physical properties for either the tube or the shell side fluids are internally evaluated by calling on an enormous data bank composed of more than a hundred fluid compounds. This contributes to increase the accuracy of the present design. The international system of units is considered in the developed computer program. The present design has an added feature of being capable of performing modification based upon a preset design criterion, such that an optimum design is obtained at satisfying constraints set either by the user or by the method itself. Also, the present code is capable of giving an estimate of the approximate cost of the heat exchanger based on the predicted surface area of the exchanger evaluated by the program. Finally, the present thermal and hydraulic design code is tested for accuracy and consistency against some of existed and approved designs of shell and tube heat exchangers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=bell-delaware%20method" title="bell-delaware method">bell-delaware method</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchangers" title=" heat exchangers"> heat exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=shell%20and%20tube" title=" shell and tube"> shell and tube</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydraulic%20design" title=" thermal and hydraulic design"> thermal and hydraulic design</a> </p> <a href="https://publications.waset.org/abstracts/111744/thermal-and-hydraulic-design-of-shell-and-tube-heat-exchangers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/111744.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">148</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4956</span> Heat Transfer Analysis of Corrugated Plate Heat Exchanger</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ketankumar%20Gandabhai%20Patel">Ketankumar Gandabhai Patel</a>, <a href="https://publications.waset.org/abstracts/search?q=Jalpit%20Balvantkumar%20Prajapati"> Jalpit Balvantkumar Prajapati</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Plate type heat exchangers has many thin plates that are slightly apart and have very large surface areas and fluid flow passages that are good for heat transfer. This can be a more effective heat exchanger than the tube or shell heat exchanger due to advances in brazing and gasket technology that have made this plate exchanger more practical. Plate type heat exchangers are most widely used in food processing industries and dairy industries. Mostly fouling occurs in plate type heat exchanger due to deposits create an insulating layer over the surface of the heat exchanger, that decreases the heat transfer between fluids and increases the pressure drop. The pressure drop increases as a result of the narrowing of the flow area, which increases the gap velocity. Therefore, the thermal performance of the heat exchanger decreases with time, resulting in an undersized heat exchanger and causing the process efficiency to be reduced. Heat exchangers are often over sized by 70 to 80%, of which 30 % to 50% is assigned to fouling. The fouling can be reduced by varying some geometric parameters and flow parameters. Based on the study, a correlation will estimate for Nusselt number as a function of Reynolds number, Prandtl number and chevron angle. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer%20coefficient" title="heat transfer coefficient">heat transfer coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=single%20phase%20flow" title=" single phase flow"> single phase flow</a>, <a href="https://publications.waset.org/abstracts/search?q=mass%20flow%20rate" title=" mass flow rate"> mass flow rate</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure%20drop" title=" pressure drop"> pressure drop</a> </p> <a href="https://publications.waset.org/abstracts/49624/heat-transfer-analysis-of-corrugated-plate-heat-exchanger" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/49624.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">312</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4955</span> Thermal Management of Ground Heat Exchangers Applied in High Power LED</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Yuan-Ching%20Chiang">Yuan-Ching Chiang</a>, <a href="https://publications.waset.org/abstracts/search?q=Chien-Yeh%20Hsu"> Chien-Yeh Hsu</a>, <a href="https://publications.waset.org/abstracts/search?q=Chen%20Chih-Hao"> Chen Chih-Hao</a>, <a href="https://publications.waset.org/abstracts/search?q=Sih-Li%20Chen"> Sih-Li Chen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The p-n junction temperature of LEDs directly influences their operating life and luminous efficiency. An excessively high p-n junction temperature minimizes the output flux of LEDs, decreasing their brightness and influencing the photon wavelength; consequently, the operating life of LEDs decreases and their luminous output changes. The maximum limit of the p-n junction temperature of LEDs is approximately 120 °C. The purpose of this research was to devise an approach for dissipating heat generated in a confined space when LEDs operate at low temperatures to reduce light decay. The cooling mode of existing commercial LED lights can be divided into natural- and forced convection cooling. In natural convection cooling, the volume of LED encapsulants must be increased by adding more fins to increase the cooling area. However, this causes difficulties in achieving efficient LED lighting at high power. Compared with forced convection cooling, heat transfer through water convection is associated with a higher heat transfer coefficient per unit area; therefore, we dissipated heat by using a closed loop water cooling system. Nevertheless, cooling water exposed to air can be easily influenced by environmental factors. Thus, we incorporated a ground heat exchanger into the water cooling system to minimize the influence of air on cooling water and then observed the relationship between the amounts of heat dissipated through the ground and LED efficiency. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=helical%20ground%20heat%20exchanger" title="helical ground heat exchanger">helical ground heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=high%20power%20LED" title=" high power LED"> high power LED</a>, <a href="https://publications.waset.org/abstracts/search?q=ground%20source%20cooling%20system" title=" ground source cooling system"> ground source cooling system</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20dissipation" title=" heat dissipation"> heat dissipation</a> </p> <a href="https://publications.waset.org/abstracts/34341/thermal-management-of-ground-heat-exchangers-applied-in-high-power-led" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34341.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">579</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4954</span> Waste Heat Recovery Using Spiral Heat Exchanger</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Parthiban%20S.%20R.">Parthiban S. R.</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Spiral heat exchangers are known as excellent heat exchanger because of far compact and high heat transfer efficiency. An innovative spiral heat exchanger based on polymer materials is designed for waste heat recovery process. Such a design based on polymer film technology provides better corrosion and chemical resistance compared to conventional metal heat exchangers. Due to the smooth surface of polymer film fouling is reduced. A new arrangement for flow of hot flue gas and cold fluid is employed for design, flue gas flows in axial path while the cold fluid flows in a spiral path. Heat load recovery achieved with the presented heat exchanger is in the range of 1.5 kW thermic but potential heat recovery about 3.5 kW might be achievable. To measure the performance of the spiral tube heat exchanger, its model is suitably designed and fabricated so as to perform experimental tests. The paper gives analysis of spiral tube heat exchanger. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spiral%20heat%20exchanger" title="spiral heat exchanger">spiral heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=polymer%20based%20materials" title=" polymer based materials"> polymer based materials</a>, <a href="https://publications.waset.org/abstracts/search?q=fouling%20factor" title=" fouling factor"> fouling factor</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20load" title=" heat load"> heat load</a> </p> <a href="https://publications.waset.org/abstracts/26107/waste-heat-recovery-using-spiral-heat-exchanger" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26107.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">391</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4953</span> Determination of Optimum Fin Wave Angle and Its Effect on the Performance of an Intercooler</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20Hamzehei">Mahdi Hamzehei</a>, <a href="https://publications.waset.org/abstracts/search?q=Seyyed%20Amin%20Hakim"> Seyyed Amin Hakim</a>, <a href="https://publications.waset.org/abstracts/search?q=Nahid%20Taherian"> Nahid Taherian</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Fins play an important role in increasing the efficiency of compact shell and tube heat exchangers by increasing heat transfer. The objective of this paper is to determine the optimum fin wave angle, as one of the geometric parameters affecting the efficiency of the heat exchangers. To this end, finite volume method is used to model and simulate the flow in heat exchanger. In this study, computational fluid dynamics simulations of wave channel are done. The results show that the wave angle affects the temperature output of the heat exchanger. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fin%20wave%20angle" title="fin wave angle">fin wave angle</a>, <a href="https://publications.waset.org/abstracts/search?q=tube" title=" tube"> tube</a>, <a href="https://publications.waset.org/abstracts/search?q=intercooler" title=" intercooler"> intercooler</a>, <a href="https://publications.waset.org/abstracts/search?q=optimum" title=" optimum"> optimum</a>, <a href="https://publications.waset.org/abstracts/search?q=performance" title=" performance"> performance</a> </p> <a href="https://publications.waset.org/abstracts/41621/determination-of-optimum-fin-wave-angle-and-its-effect-on-the-performance-of-an-intercooler" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/41621.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">383</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4952</span> Polymer Spiral Film Gas-Liquid Heat Exchanger for Waste Heat Recovery in Exhaust Gases</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20R.%20Parthiban">S. R. Parthiban</a>, <a href="https://publications.waset.org/abstracts/search?q=C.%20Elajchet%20Senni"> C. Elajchet Senni </a> </p> <p class="card-text"><strong>Abstract:</strong></p> Spiral heat exchangers are known as excellent heat exchanger because of far compact and high heat transfer efficiency. An innovative spiral heat exchanger based on polymer materials is designed for waste heat recovery process. Such a design based on polymer film technology provides better corrosion and chemical resistance compared to conventional metal heat exchangers. Due to the smooth surface of polymer film fouling is reduced. A new arrangement for flow of hot flue gas and cold fluid is employed for design, flue gas flows in axial path while the cold fluid flows in a spiral path. Heat load recovery achieved with the presented heat exchanger is in the range of 1.5 kW thermic but potential heat recovery about 3.5kW might be achievable. To measure the performance of the spiral tube heat exchanger, its model is suitably designed and fabricated so as to perform experimental tests. The paper gives analysis of spiral tube heat exchanger. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=spiral%20heat%20exchanger" title="spiral heat exchanger">spiral heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=polymer%20based%20materials" title=" polymer based materials"> polymer based materials</a>, <a href="https://publications.waset.org/abstracts/search?q=fouling%20factor" title=" fouling factor"> fouling factor</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20load" title=" heat load"> heat load</a> </p> <a href="https://publications.waset.org/abstracts/26811/polymer-spiral-film-gas-liquid-heat-exchanger-for-waste-heat-recovery-in-exhaust-gases" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/26811.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">368</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4951</span> Numerical Studies on the Performance of the Finned-Tube Heat Exchanger</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20P.%20Praveen%20Kumar">S. P. Praveen Kumar</a>, <a href="https://publications.waset.org/abstracts/search?q=Bong-Su%20Sin"> Bong-Su Sin</a>, <a href="https://publications.waset.org/abstracts/search?q=Kwon-Hee%20Lee"> Kwon-Hee Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Finned-tube heat exchangers are predominantly used in space conditioning systems, as well as other applications requiring heat exchange between two fluids. The design of finned-tube heat exchangers requires the selection of over a dozen design parameters by the designer such as tube pitch, tube diameter, tube thickness, etc. Finned-tube heat exchangers are common devices; however, their performance characteristics are complicated. In this paper, numerical studies have been carried out to analyze the performances of finned tube heat exchanger (without fins considered for experimental purpose) by predicting the characteristics of temperature difference and pressure drop. In this study, a design considering 5 design variables, maximizing the temperature difference and minimizing the pressure drop was suggested by applying DOE. In this process, L18 orthogonal array was adopted. Parametric analytical studies have been carried out using Analysis of Variance (ANOVA) to determine the relative importance of each variable with respect to the temperature difference and the pressure drop. Following the results, the final design was suggested by predicting the optimum design therefore confirming the optimized condition. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger" title="heat exchanger">heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=fluid%20analysis" title=" fluid analysis"> fluid analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title=" heat transfer"> heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=design%20of%20experiment" title=" design of experiment"> design of experiment</a>, <a href="https://publications.waset.org/abstracts/search?q=analysis%20of%20variance" title=" analysis of variance"> analysis of variance</a> </p> <a href="https://publications.waset.org/abstracts/4352/numerical-studies-on-the-performance-of-the-finned-tube-heat-exchanger" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4352.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">446</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4950</span> A Phase Change Materials Thermal Storage for Ground-Source Heat Pumps: Computational Fluid Dynamics Analysis of Innovative Layouts</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Emanuele%20Bonamente">Emanuele Bonamente</a>, <a href="https://publications.waset.org/abstracts/search?q=Andrea%20Aquino"> Andrea Aquino</a>, <a href="https://publications.waset.org/abstracts/search?q=Franco%20Cotana"> Franco Cotana</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The exploitation of the low-temperature geothermal resource via ground-source heat pumps is often limited by the high investment cost mainly due to borehole drilling. From the monitoring of a prototypal system currently used by a commercial building, it was found that a simple upgrade of the conventional layout, obtained including a thermal storage between the ground-source heat exchangers and the heat pump, can optimize the ground energy exploitation requiring for shorter/fewer boreholes. For typical applications, a reduction of up to 66% with respect to the conventional layout can be easily achieved. Results from the monitoring campaign of the prototype are presented in this paper, and upgrades of the thermal storage using phase change materials (PCMs) are proposed using computational fluid dynamics simulations. The PCM thermal storage guarantees an improvement of the system coefficient of performance both for summer cooling and winter heating (up to 25%). A drastic reduction of the storage volume (approx. 1/10 of the original size) is also achieved, making it possible to easily place it within the technical room, avoiding extra costs for underground displacement. A preliminary optimization of the PCM geometry is finally proposed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics%20%28CFD%29" title="computational fluid dynamics (CFD)">computational fluid dynamics (CFD)</a>, <a href="https://publications.waset.org/abstracts/search?q=geothermal%20energy" title=" geothermal energy"> geothermal energy</a>, <a href="https://publications.waset.org/abstracts/search?q=ground-source%20heat%20pumps" title=" ground-source heat pumps"> ground-source heat pumps</a>, <a href="https://publications.waset.org/abstracts/search?q=phase%20change%20materials%20%28PCM%29" title=" phase change materials (PCM)"> phase change materials (PCM)</a> </p> <a href="https://publications.waset.org/abstracts/56262/a-phase-change-materials-thermal-storage-for-ground-source-heat-pumps-computational-fluid-dynamics-analysis-of-innovative-layouts" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/56262.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">267</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4949</span> Numerical Study of the Influence of the Primary Stream Pressure on the Performance of the Ejector Refrigeration System Based on Heat Exchanger Modeling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elhameh%20Narimani">Elhameh Narimani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mikhail%20Sorin"> Mikhail Sorin</a>, <a href="https://publications.waset.org/abstracts/search?q=Philippe%20Micheau"> Philippe Micheau</a>, <a href="https://publications.waset.org/abstracts/search?q=Hakim%20Nesreddine"> Hakim Nesreddine</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Numerical models of the heat exchangers in ejector refrigeration system (ERS) were developed and validated with the experimental data. The models were based on the switched heat exchangers model using the moving boundary method, which were capable of estimating the zones’ lengths, the outlet temperatures of both sides and the heat loads at various experimental points. The developed models were utilized to investigate the influence of the primary flow pressure on the performance of an R245fa ERS based on its coefficient of performance (COP) and exergy efficiency. It was illustrated numerically and proved experimentally that increasing the primary flow pressure slightly reduces the COP while the exergy efficiency goes through a maximum before decreasing. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Coefficient%20of%20Performance" title="Coefficient of Performance">Coefficient of Performance</a>, <a href="https://publications.waset.org/abstracts/search?q=COP" title=" COP"> COP</a>, <a href="https://publications.waset.org/abstracts/search?q=Ejector%20Refrigeration%20System" title=" Ejector Refrigeration System"> Ejector Refrigeration System</a>, <a href="https://publications.waset.org/abstracts/search?q=ERS" title=" ERS"> ERS</a>, <a href="https://publications.waset.org/abstracts/search?q=exergy%20efficiency%20%28%CE%B7II%29" title=" exergy efficiency (ηII)"> exergy efficiency (ηII)</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchangers%20modeling" title=" heat exchangers modeling"> heat exchangers modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=moving%20boundary%20method" title=" moving boundary method"> moving boundary method</a> </p> <a href="https://publications.waset.org/abstracts/97293/numerical-study-of-the-influence-of-the-primary-stream-pressure-on-the-performance-of-the-ejector-refrigeration-system-based-on-heat-exchanger-modeling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97293.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">202</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4948</span> Comparative Analysis of Two Modeling Approaches for Optimizing Plate Heat Exchangers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F%C3%A1bio%20A.%20S.%20Mota">Fábio A. S. Mota</a>, <a href="https://publications.waset.org/abstracts/search?q=Mauro%20A.%20S.%20S.%20Ravagnani"> Mauro A. S. S. Ravagnani</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20P.%20Carvalho"> E. P. Carvalho</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the present paper the design of plate heat exchangers is formulated as an optimization problem considering two mathematical modeling. The number of plates is the objective function to be minimized, considering implicitly some parameters configuration. Screening is the optimization method used to solve the problem. Thermal and hydraulic constraints are verified, not viable solutions are discarded and the method searches for the convergence to the optimum, case it exists. A case study is presented to test the applicability of the developed algorithm. Results show coherency with the literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=plate%20heat%20exchanger" title="plate heat exchanger">plate heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=optimization" title=" optimization"> optimization</a>, <a href="https://publications.waset.org/abstracts/search?q=modeling" title=" modeling"> modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/2716/comparative-analysis-of-two-modeling-approaches-for-optimizing-plate-heat-exchangers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2716.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">518</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4947</span> Energy Conservation in Heat Exchangers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Nadia%20Allouache">Nadia Allouache</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Energy conservation is one of the major concerns in the modern high tech era due to the limited amount of energy resources and the increasing cost of energy. Predicting an efficient use of energy in thermal systems like heat exchangers can only be achieved if the second law of thermodynamics is accounted for. The performance of heat exchangers can be substantially improved by many passive heat transfer augmentation techniques. These letters permit to improve heat transfer rate and to increase exchange surface, but on the other side, they also increase the friction factor associated with the flow. This raises the question of how to employ these passive techniques in order to minimize the useful energy. The objective of this present study is to use a porous substrate attached to the walls as a passive enhancement technique in heat exchangers and to find the compromise between the hydrodynamic and thermal performances under turbulent flow conditions, by using a second law approach. A modified k- ε model is used to simulating the turbulent flow in the porous medium and the turbulent shear flow is accounted for in the entropy generation equation. A numerical modeling, based on the finite volume method is employed for discretizing the governing equations. Effects of several parameters are investigated such as the porous substrate properties and the flow conditions. Results show that under certain conditions of the porous layer thickness, its permeability, and its effective thermal conductivity the minimum rate of entropy production is obtained. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=second%20law%20approach" title="second law approach">second law approach</a>, <a href="https://publications.waset.org/abstracts/search?q=annular%20heat%20exchanger" title=" annular heat exchanger"> annular heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=turbulent%20flow" title=" turbulent flow"> turbulent flow</a>, <a href="https://publications.waset.org/abstracts/search?q=porous%20medium" title=" porous medium"> porous medium</a>, <a href="https://publications.waset.org/abstracts/search?q=modified%20model" title=" modified model"> modified model</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20analysis" title=" numerical analysis"> numerical analysis</a> </p> <a href="https://publications.waset.org/abstracts/46348/energy-conservation-in-heat-exchangers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/46348.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">288</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4946</span> Numerical Investigation of Nanofluid Based Thermosyphon System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kiran%20Kumar%20K.">Kiran Kumar K.</a>, <a href="https://publications.waset.org/abstracts/search?q=Ramesh%20Babu%20Bejjam"> Ramesh Babu Bejjam</a>, <a href="https://publications.waset.org/abstracts/search?q=Atul%20Najan"> Atul Najan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A thermosyphon system is a heat transfer loop which operates on the basis of gravity and buoyancy forces. It guarantees a good reliability and low maintenance cost as it does not involve any mechanical pump. Therefore it can be used in many industrial applications such as refrigeration and air conditioning, electronic cooling, nuclear reactors, geothermal heat extraction, etc. But flow instabilities and loop configuration are the major problems in this system. Several previous researchers studied that stabilities can be suppressed by using nanofluids as loop fluid. In the present study a rectangular thermosyphon loop with end heat exchangers are considered for the study. This configuration is more appropriate for many practical applications such as solar water heater, geothermal heat extraction, etc. In the present work, steady-state analysis is carried out on thermosyphon loop with parallel flow coaxial heat exchangers at heat source and heat sink. In this loop nano fluid is considered as the loop fluid and water is considered as the external fluid in both hot and cold heat exchangers. For this analysis one-dimensional homogeneous model is developed. In this model, conservation equations like conservation of mass, momentum, energy are discretized using finite difference method. A computer code is written in MATLAB to simulate the flow in thermosyphon loop. A comparison in terms of heat transfer is made between water and nano fluid as working fluids in the loop. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger" title="heat exchanger">heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title=" heat transfer"> heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofluid" title=" nanofluid"> nanofluid</a>, <a href="https://publications.waset.org/abstracts/search?q=thermosyphon%20loop" title=" thermosyphon loop"> thermosyphon loop</a> </p> <a href="https://publications.waset.org/abstracts/11870/numerical-investigation-of-nanofluid-based-thermosyphon-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/11870.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">477</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4945</span> Effect of Deep Cryogenic Treatment on Aluminium Alloy Used for Making Heat Exchangers in Automotive HVAC System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Mohit">H. Mohit</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In automotive air conditioning system, two heat exchangers are used as evaporator and condenser which are placed inside the bonnet of a car in a compact manner. The dust particles from outside and moisture content produced during the process leads to formation of impure particles on the surface of evaporator coil. But in condenser coil, the impure particles are settling down due to dust from atmosphere. The major problem of the heat exchanger used in automotive air conditioning is leakage of refrigerant due to corrosion. This effect of corrosion will lead to damage on the surface of heat exchanger and leakage of refrigerant from the system. To protect from corrosion, coatings are applied on its surfaces. Nowadays, to improve the corrosion resistance of these heat exchangers, hydrophilic coatings are used, which is very expensive. Cryogenic treatment is one method which involves the treatment of materials below -150 °C using the cryogenic fluid such as liquid nitrogen. In this project work, a study of improvement in corrosion resistance of materials of aluminium alloys of various grades as AA 1100, AA 6061, AA 6063 and AA 2024 that are mainly used for fin and tube heat exchangers in automotive air conditioning system is made. In total, five different processes are selected for these grades of aluminium alloy and various parameters like corrosion rate, dimensional stability, hardness and microstructure are measured. The improvements were observed in these parameters while comparing it with conventional heat treatment process. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cryogenic%20treatment" title="cryogenic treatment">cryogenic treatment</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion%20resistance" title=" corrosion resistance"> corrosion resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=dimensional%20stability" title=" dimensional stability"> dimensional stability</a>, <a href="https://publications.waset.org/abstracts/search?q=materials%20science" title=" materials science"> materials science</a> </p> <a href="https://publications.waset.org/abstracts/10238/effect-of-deep-cryogenic-treatment-on-aluminium-alloy-used-for-making-heat-exchangers-in-automotive-hvac-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/10238.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">262</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4944</span> Investigations of Thermo Fluid Characteristics of Copper Alloy Porous Heat Sinks by Forced Air Cooling</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ashish%20Mahalle">Ashish Mahalle</a>, <a href="https://publications.waset.org/abstracts/search?q=Kishore%20Borakhade"> Kishore Borakhade </a> </p> <p class="card-text"><strong>Abstract:</strong></p> High porosity metal foams are excellent for heat dissipation. There use has been widened to include heat removal from high density microelectronics circuits. Other important applications have been found in compact heat exchangers for airborne equipment, regenerative and dissipative air cooled condenser towers, and compact heat sinks for power electronic. The low relative density, open porosity and high thermal conductivity of the cell edges, large accessible surface area per unit volume, and the ability to mix the cooling fluid make metal foam heat exchangers efficient, compact and light weight. This paper reports the thermal performance of metal foam for high heat dissipation. In experimentation metal foam samples of different pore diameters i.e. 35 µ, 20 µ, 12 µ, are analyzed for varying velocities and heat inputs. The study investigate the effect of various dimensionless no. like Re,Nu, Pr and heat transfer characteristics of basic flow configuration. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=pores" title="pores">pores</a>, <a href="https://publications.waset.org/abstracts/search?q=foam" title=" foam"> foam</a>, <a href="https://publications.waset.org/abstracts/search?q=effective%20thermal%20conductivity" title=" effective thermal conductivity"> effective thermal conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=permeability" title=" permeability"> permeability</a> </p> <a href="https://publications.waset.org/abstracts/34928/investigations-of-thermo-fluid-characteristics-of-copper-alloy-porous-heat-sinks-by-forced-air-cooling" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34928.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">311</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4943</span> Nanofibrous Ion Exchangers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jarom%C3%ADr%20Marek">Jaromír Marek</a>, <a href="https://publications.waset.org/abstracts/search?q=Jakub%20Wiener"> Jakub Wiener</a>, <a href="https://publications.waset.org/abstracts/search?q=Yan%20Wang"> Yan Wang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The main goal of this study was to find simple and industrially applicable production of ion exchangers based on nanofibrous polystyrene matrix and characterization of prepared material. Starting polystyrene nanofibers were sulfonated and crosslinked under appropriate conditions at the same time by sulfuric acid. Strongly acidic cation exchanger was obtained in such a way. The polymer matrix was made from polystyrene nanofibers prepared by Nanospider technology. Various types postpolymerization reactions and other methods of crosslinking were studied. Greatly different behavior between nano and microsize materials was observed. The final nanofibrous material was characterized and compared to common granular ion exchangers and available microfibrous ion exchangers. The sorption properties of nanofibrous ion exchangers were compared with the granular ion exchangers. For nanofibrous ion exchangers of comparable ion exchange capacity was observed considerably faster adsorption kinetics. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electrospinning" title="electrospinning">electrospinning</a>, <a href="https://publications.waset.org/abstracts/search?q=ion%20exchangers" title=" ion exchangers"> ion exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=nanofibers" title=" nanofibers"> nanofibers</a>, <a href="https://publications.waset.org/abstracts/search?q=polystyrene" title=" polystyrene"> polystyrene</a> </p> <a href="https://publications.waset.org/abstracts/7821/nanofibrous-ion-exchangers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7821.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">257</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4942</span> Crystallization Fouling from Potable Water in Heat Exchangers and Evaporators</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Amthal%20Al-Gailani">Amthal Al-Gailani</a>, <a href="https://publications.waset.org/abstracts/search?q=Olujide%20Sanni"> Olujide Sanni</a>, <a href="https://publications.waset.org/abstracts/search?q=Thibaut%20Charpentier"> Thibaut Charpentier</a>, <a href="https://publications.waset.org/abstracts/search?q=Anne%20Neville"> Anne Neville</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Formation of inorganic scale on heat transfer surfaces is a serious problem encountered in industrial, commercial, and domestic heat exchangers and systems. Several industries use potable/groundwater sources such as rivers, lakes, and oceans to use water as a working fluid in heat exchangers and steamers. As potable/surface water contains diverse salt ionic species, the scaling kinetics and deposit morphology are expected to be different from those found in artificially hardened solutions. In this work, scale formation on the heat transfer surfaces from potable water has been studied using a once-through open flow cell under atmospheric pressure. The surface scaling mechanism and deposit morphology are investigated at high surface temperature. Thus the water evaporation process has to be considered. The effect of surface temperature, flow rate, and inhibitor deployment on the thermal resistance and morphology of the scale have been investigated. The study findings show how an increase in surface temperature enhances the crystallization reaction kinetics on the surface. There is an increase in the amount of scale and the resistance to heat transfer. The fluid flow rate also increases the fouling resistance and the thickness of the scale layer. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fouling" title="fouling">fouling</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger" title=" heat exchanger"> heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20resistance" title=" thermal resistance"> thermal resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=crystallization" title=" crystallization"> crystallization</a>, <a href="https://publications.waset.org/abstracts/search?q=potable%20water" title=" potable water"> potable water</a> </p> <a href="https://publications.waset.org/abstracts/109268/crystallization-fouling-from-potable-water-in-heat-exchangers-and-evaporators" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/109268.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">145</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4941</span> Empirical Heat Transfer Correlations of Finned-Tube Heat Exchangers in Pulsatile Flow</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jason%20P.%20Michaud">Jason P. Michaud</a>, <a href="https://publications.waset.org/abstracts/search?q=Connor%20P.%20Speer"> Connor P. Speer</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20A.%20Miller"> David A. Miller</a>, <a href="https://publications.waset.org/abstracts/search?q=David%20S.%20Nobes"> David S. Nobes</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An experimental study on finned-tube radiators has been conducted. Three radiators found in desktop computers sized for 120 mm fans were tested in steady and pulsatile flows of ambient air over a Reynolds number range of  50 < Re < 900. Water at 60 °C was circulated through the radiators to maintain a constant fin temperature during the tests. For steady flow, it was found that the heat transfer rate increased linearly with the mass flow rate of air. The pulsatile flow experiments showed that frequency of pulsation had a negligible effect on the heat transfer rate for the range of frequencies tested (0.5 Hz – 2.5 Hz). For all three radiators, the heat transfer rate was decreased in the case of pulsatile flow. Linear heat transfer correlations for steady and pulsatile flow were calculated in terms of Reynolds number and Nusselt number. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=finned-tube%20heat%20exchangers" title="finned-tube heat exchangers">finned-tube heat exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer%20correlations" title=" heat transfer correlations"> heat transfer correlations</a>, <a href="https://publications.waset.org/abstracts/search?q=pulsatile%20flow" title=" pulsatile flow"> pulsatile flow</a>, <a href="https://publications.waset.org/abstracts/search?q=computer%20radiators" title=" computer radiators"> computer radiators</a> </p> <a href="https://publications.waset.org/abstracts/59633/empirical-heat-transfer-correlations-of-finned-tube-heat-exchangers-in-pulsatile-flow" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/59633.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">506</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4940</span> Estimation of Fouling in a Cross-Flow Heat Exchanger Using Artificial Neural Network Approach</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Rania%20Jradi">Rania Jradi</a>, <a href="https://publications.waset.org/abstracts/search?q=Christophe%20Marvillet"> Christophe Marvillet</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Razak%20Jeday"> Mohamed Razak Jeday</a> </p> <p class="card-text"><strong>Abstract:</strong></p> One of the most frequently encountered problems in industrial heat exchangers is fouling, which degrades the thermal and hydraulic performances of these types of equipment, leading thus to failure if undetected. And it occurs due to the accumulation of undesired material on the heat transfer surface. So, it is necessary to know about the heat exchanger fouling dynamics to plan mitigation strategies, ensuring a sustainable and safe operation. This paper proposes an Artificial Neural Network (ANN) approach to estimate the fouling resistance in a cross-flow heat exchanger by the collection of the operating data of the phosphoric acid concentration loop. The operating data of 361 was used to validate the proposed model. The ANN attains AARD= 0.048%, MSE= 1.811x10⁻¹¹, RMSE= 4.256x 10⁻⁶ and r²=99.5 % of accuracy which confirms that it is a credible and valuable approach for industrialists and technologists who are faced with the drawbacks of fouling in heat exchangers. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cross-flow%20heat%20exchanger" title="cross-flow heat exchanger">cross-flow heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=fouling" title=" fouling"> fouling</a>, <a href="https://publications.waset.org/abstracts/search?q=estimation" title=" estimation"> estimation</a>, <a href="https://publications.waset.org/abstracts/search?q=phosphoric%20acid%20concentration%20loop" title=" phosphoric acid concentration loop"> phosphoric acid concentration loop</a>, <a href="https://publications.waset.org/abstracts/search?q=artificial%20neural%20network%20approach" title=" artificial neural network approach"> artificial neural network approach</a> </p> <a href="https://publications.waset.org/abstracts/140600/estimation-of-fouling-in-a-cross-flow-heat-exchanger-using-artificial-neural-network-approach" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140600.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">198</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4939</span> The Influence of Chevron Angle on Plate Heat Exchanger Thermal Performance with Considering Maldistribution</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hossein%20Shokouhmand">Hossein Shokouhmand</a>, <a href="https://publications.waset.org/abstracts/search?q=Majid%20Hasanpour"> Majid Hasanpour</a> </p> <p class="card-text"><strong>Abstract:</strong></p> A new modification to the Strelow method of chevron-type plate heat exchangers (PHX) modeling is proposed. The effects of maldistribution are accounted in the resulting equation. The results of calculations are validated by reported experiences. The good accuracy of heat transfer performance prediction is shown. The results indicate that considering flow maldistribution improve the accuracy of predicting the flow and thermal behavior of the plate exchanger. Additionally, a wide range of the parametric study has been presented which brings out the effects of chevron angle of PHE on its thermal efficiency with considering maldistribution effect. In addition, the thermally optimal corrugation discussed for the chevron-type PHEs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chevron%20angle" title="chevron angle">chevron angle</a>, <a href="https://publications.waset.org/abstracts/search?q=plate%20heat%20exchangers" title=" plate heat exchangers"> plate heat exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=maldistribution" title=" maldistribution"> maldistribution</a>, <a href="https://publications.waset.org/abstracts/search?q=strelow%20method" title=" strelow method"> strelow method</a> </p> <a href="https://publications.waset.org/abstracts/86320/the-influence-of-chevron-angle-on-plate-heat-exchanger-thermal-performance-with-considering-maldistribution" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/86320.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">190</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4938</span> Comparison on Electrode and Ground Arrangements Effect on Heat Transfer under Electric Force in a Channel and a Cavity Flow</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Suwimon%20Saneewong%20Na%20Ayuttaya">Suwimon Saneewong Na Ayuttaya</a>, <a href="https://publications.waset.org/abstracts/search?q=Chainarong%20Chaktranond"> Chainarong Chaktranond</a>, <a href="https://publications.waset.org/abstracts/search?q=Phadungsak%20Rattanadecho"> Phadungsak Rattanadecho</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study numerically investigates the effects of Electrohydrodynamic on flow patterns and heat transfer enhancement within a cavity which is on the lower wall of channel. In this simulation, effects of using ground wire and ground plate on the flow patterns are compared. Moreover, the positions of electrode wire respecting with ground are tested in the range of angles θ = 0 - 180°. High electrical voltage exposes to air is 20 kV. Bulk mean velocity and temperature of inlet air are controlled at 0.1 m/s and 60°C, respectively. The result shows when electric field is applied, swirling flow is appeared in the channel. In addition, swirling flow patterns in the main flow of using ground plate are widely spreader than that of using ground wire. Moreover, direction of swirling flow also affects the flow pattern and heat transfer in a cavity. These cause the using ground wire to give the maximum temperature and heat transfer higher than using ground plate. Furthermore, when the angle is at θ = 60°, high shear flow effect is obtained. This results show high strength of swirling flow and effective heat transfer enhancement. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=swirling%20flow" title="swirling flow">swirling flow</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20transfer" title=" heat transfer"> heat transfer</a>, <a href="https://publications.waset.org/abstracts/search?q=electrohydrodynamic" title=" electrohydrodynamic"> electrohydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20analysis" title=" numerical analysis"> numerical analysis</a> </p> <a href="https://publications.waset.org/abstracts/9317/comparison-on-electrode-and-ground-arrangements-effect-on-heat-transfer-under-electric-force-in-a-channel-and-a-cavity-flow" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/9317.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">292</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4937</span> Study on the Effects of Geometrical Parameters of Helical Fins on Heat Transfer Enhancement of Finned Tube Heat Exchangers</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20Asadi">H. Asadi</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Naderan%20Tahan"> H. Naderan Tahan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this paper is to investigate the effect of geometrical properties of helical fins in double pipe heat exchangers. On the other hand, the purpose of this project is to derive the hydraulic and thermal design tables and equations of double heat exchangers with helical fins. The numerical modeling is implemented to calculate the considered parameters. Design tables and correlated equations are generated by repeating the parametric numerical procedure for different fin geometries. Friction factor coefficient and Nusselt number are calculated for different amounts of Reynolds, fluid Prantle and fin twist angles for the range of laminar fluid flow in annular tube with helical fins. Results showed that friction factor coefficient and Nusselt number will be increased for higher Reynolds numbers and fins’ twist angles in general. These two parameters follow different patterns in response to Reynolds number increment. Thermal performance factor is defined to analyze these different patterns. Temperature and velocity contours are plotted against twist angle and number of fins to describe the changes in flow patterns in different geometries of twisted finned annulus. Finally twisted finned annulus friction factor coefficient, Nusselt Number and thermal performance factor are correlated by simulating the model in different design points. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=double%20pipe%20heat%20exchangers" title="double pipe heat exchangers">double pipe heat exchangers</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger%20performance" title=" heat exchanger performance"> heat exchanger performance</a>, <a href="https://publications.waset.org/abstracts/search?q=twisted%20fins" title=" twisted fins"> twisted fins</a>, <a href="https://publications.waset.org/abstracts/search?q=computational%20fluid%20dynamics" title=" computational fluid dynamics"> computational fluid dynamics</a> </p> <a href="https://publications.waset.org/abstracts/52023/study-on-the-effects-of-geometrical-parameters-of-helical-fins-on-heat-transfer-enhancement-of-finned-tube-heat-exchangers" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52023.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">289</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4936</span> Investigations of the Crude Oil Distillation Preheat Section in Unit 100 of Abadan Refinery and Its Recommendation</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20GoharRokhi">Mahdi GoharRokhi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20H.%20Ruhipour"> Mohammad H. Ruhipour</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohammad%20R.%20ZamaniZadeh"> Mohammad R. ZamaniZadeh</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohsen%20Maleki"> Mohsen Maleki</a>, <a href="https://publications.waset.org/abstracts/search?q=Yusef%20Shamsayi"> Yusef Shamsayi</a>, <a href="https://publications.waset.org/abstracts/search?q=Mahdi%20FarhaniNejad"> Mahdi FarhaniNejad</a>, <a href="https://publications.waset.org/abstracts/search?q=Farzad%20FarrokhZadeh"> Farzad FarrokhZadeh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Possessing massive resources of natural gas and petroleum, Iran has a special place among all other oil producing countries, according to international institutions of energy. In order to use these resources, development and functioning optimization of refineries and industrial units is mandatory. Heat exchanger is one of the most important and strategic equipment which its key role in the process of production is clear to everyone. For instance, if the temperature of a processing fluid is not set as needed by heat exchangers, the specifications of desired product can change profoundly. Crude oil enters a network of heat exchangers in atmospheric distillation section before getting into the distillation tower; in this case, well-functioning of heat exchangers can significantly affect the operation of distillation tower. In this paper, different scenarios for pre-heating of oil are studied using oil and gas simulation software, and the results are discussed. As we reviewed various scenarios, adding a heat exchanger to pre-heating network is proposed as the most efficient factor in improving all governing parameters of the tower i.e. temperature, pressure, and reflux rate. This exchanger is embedded in crude oil’s path. Crude oil enters the exchanger after E-101 and exchanges heat with discharging kerosene pump around from E-136. As depicted in the results, it will efficiently assist the improvement of process operation and side expenses. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=atmospheric%20distillation%20unit" title="atmospheric distillation unit">atmospheric distillation unit</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger" title=" heat exchanger"> heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=preheat" title=" preheat"> preheat</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/50535/investigations-of-the-crude-oil-distillation-preheat-section-in-unit-100-of-abadan-refinery-and-its-recommendation" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/50535.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">660</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4935</span> Quantitative Changes in Biofilms of a Seawater Tubular Heat Exchanger Subjected to Electromagnetic Fields Treatment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sergio%20Garcia">Sergio Garcia</a>, <a href="https://publications.waset.org/abstracts/search?q=Alfredo%20Trueba"> Alfredo Trueba</a>, <a href="https://publications.waset.org/abstracts/search?q=Luis%20M.%20Vega"> Luis M. Vega</a>, <a href="https://publications.waset.org/abstracts/search?q=Ernesto%20Madariaga"> Ernesto Madariaga</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Biofilms adhesion is one of the more important cost of industries plants on wide world, which use to water for cooling heat exchangers or are in contact with water. This study evaluated the effect of Electromagnetic Fields on biofilms in tubular heat exchangers using seawater cooling. The results showed an up to 40% reduction of the biofilm thickness compared to the untreated control tubes. The presence of organic matter was reduced by 75%, the inorganic mater was reduced by 87%, and 53% of the dissolved solids were eliminated. The biofilm thermal conductivity in the treated tube was reduced by 53% as compared to the control tube. The hardness in the effluent during the experimental period was decreased by 18% in the treated tubes compared with control tubes. Our results show that the electromagnetic fields treatment has a great potential in the process of removing biofilms in heat exchanger. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biofilm" title="biofilm">biofilm</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchanger" title=" heat exchanger"> heat exchanger</a>, <a href="https://publications.waset.org/abstracts/search?q=electromagnetic%20fields" title=" electromagnetic fields"> electromagnetic fields</a>, <a href="https://publications.waset.org/abstracts/search?q=seawater" title=" seawater"> seawater</a> </p> <a href="https://publications.waset.org/abstracts/90367/quantitative-changes-in-biofilms-of-a-seawater-tubular-heat-exchanger-subjected-to-electromagnetic-fields-treatment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90367.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">191</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4934</span> Short-Term Energy Efficiency Decay and Risk Analysis of Ground Source Heat Pump System</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tu%20Shuyang">Tu Shuyang</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhang%20Xu"> Zhang Xu</a>, <a href="https://publications.waset.org/abstracts/search?q=Zhou%20Xiang"> Zhou Xiang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The objective of this paper is to investigate the effect of short-term heat exchange decay of ground heat exchanger (GHE) on the ground source heat pump (GSHP) energy efficiency and capacity. A resistance-capacitance (RC) model was developed and adopted to simulate the transient characteristics of the ground thermal condition and heat exchange. The capacity change of the GSHP was linked to the inlet and outlet water temperature by polynomial fitting according to measured parameters given by heat pump manufacturers. Thus, the model, which combined the heat exchange decay with the capacity change, reflected the energy efficiency decay of the whole system. A case of GSHP system was analyzed by the model, and the result showed that there was risk that the GSHP might not meet the load demand because of the efficiency decay in a short-term operation. The conclusion would provide some guidances for GSHP system design to overcome the risk. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=capacity" title="capacity">capacity</a>, <a href="https://publications.waset.org/abstracts/search?q=energy%20efficiency" title=" energy efficiency"> energy efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=GSHP" title=" GSHP"> GSHP</a>, <a href="https://publications.waset.org/abstracts/search?q=heat%20exchange" title=" heat exchange"> heat exchange</a> </p> <a href="https://publications.waset.org/abstracts/69608/short-term-energy-efficiency-decay-and-risk-analysis-of-ground-source-heat-pump-system" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/69608.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge 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