<?xml version="1.0" encoding="UTF-8"?> <article key="pdf/10008795" mdate="2018-02-04 00:00:00"> <author>Liqiang Duan and Ma Jingkai and Lv Zhipeng and Haifan Cai</author> <title>Study on the Integration Schemes and Performance Comparisons of Different Integrated Solar Combined CycleDirect Steam Generation Systems </title> <pages>259 - 269</pages> <year>2018</year> <volume>12</volume> <number>4</number> <journal>International Journal of Energy and Environmental Engineering</journal> <ee>https://publications.waset.org/pdf/10008795</ee> <url>https://publications.waset.org/vol/136</url> <publisher>World Academy of Science, Engineering and Technology</publisher> <abstract>The integrated solar combined cycle (ISCC) system has a series of advantages such as increasing the system power generation, reducing the cost of solar power generation, less pollutant and CO2 emission. In this paper, the parabolic trough collectors with direct steam generation (DSG) technology are considered to replace the heat load of heating surfaces in heat regenerator steam generation (HRSG) of a conventional natural gas combined cycle (NGCC) system containing a PG9351FA gas turbine and a triple pressure HRSG with reheat. The detailed model of the NGCC system is built in ASPEN PLUS software and the parabolic trough collectors with DSG technology is modeled in EBSILON software. ISCCDSG systems with the replacement of single, two, three and four heating surfaces are studied in this paper. Results show that (1) the ISCCDSG systems with the replacement heat load of HPB, HPBLPE, HPE2HPBHPS, HPE1HPE2 HPBHPS are the best integration schemes when single, two, three and four stages of heating surfaces are partly replaced by the parabolic trough solar energy collectors with DSG technology. (2) Both the changes of feed water flow and the heat load of the heating surfaces in ISCCDSG systems with the replacement of multistage heating surfaces are smaller than those in ISCCDSG systems with the replacement of single heating surface. (3) ISCCDSG systems with the replacement of HPBLPE heating surfaces can increase the solar power output significantly. (4) The ISCCDSG systems with the replacement of HPB heating surfaces has the highest solarthermaltoelectricity efficiency (47.45) and the solar radiation energytoelectricity efficiency (30.37), as well as the highest exergy efficiency of solar field (33.61). </abstract> <index>Open Science Index 136, 2018</index> </article>