{"title":"Maximum Water Hammer Sensitivity Analysis","authors":"Jalil Emadi, Abbas Solemani","volume":49,"journal":"International Journal of Computer and Information Engineering","pagesStart":17,"pagesEnd":21,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/13798","abstract":"Pressure waves and Water Hammer occur in a\npumping system when valves are closed or opened suddenly or in\nthe case of sudden failure of pumps. Determination of maximum\nwater hammer is considered one of the most important technical\nand economical items of which engineers and designers of\npumping stations and conveyance pipelines should take care.\nHammer Software is a recent application used to simulate water\nhammer. The present study focuses on determining significance of\neach input parameter of the application relative to the maximum\namount of water hammer estimated by the software. The study\ndetermines estimated maximum water hammer variations due to\nvariations of input parameters including water temperature, pipe\ntype, thickness and diameter, electromotor rpm and power, and\nmoment of inertia of electromotor and pump. In our study,\nKuhrang Pumping Station was modeled using WaterGEMS\nSoftware. The pumping station is characterized by total discharge\nof 200 liters per second, dynamic height of 194 meters and 1.5\nkilometers of steel conveyance pipeline and transports water to\nCheshme Morvarid for farmland irrigation. The model was run in\nsteady hydraulic condition and transferred to Hammer Software.\nThen, the model was run in several unsteady hydraulic conditions\nand sensitivity of maximum water hammer to each input parameter\nwas calculated. It is shown that parameters to which maximum\nwater hammer is most sensitive are moment of inertia of pump and\nelectromotor, diameter, type and thickness of pipe and water\ntemperature, respectively.","references":"[1] Ashofte, Jalal and Pezeshkirad, Alireza (1994), Hydraulic Application\nof Transient Waves, 1st Volume, 1st edition, Kabiri Publication Co.\n[2] Cukier R., Levine H., Shuler K., Nonlinear sensitivity analysis of\nmultiparameter model systems, Journal of Computational Physics,\n1978, Vol. 26, pp. 1-42.\n[3] Saltelli A., Tarantola S., Chan P.S., A quantitative modelindependent\nmethod for global sensitivity analysis of model output,\nTechnometrics, 1979, Vol. 41(1), pp. 39-56.\n[4] Glaeser H. G., Uncertainty evaluation of thermal-hydraulic code\nresults, Int. Meeting on \"Best-Estimate\" Methods in Nuclear\nInstallation Safety Analysis (BE-2000), Washington, D.C., USA,\n2000.\n[5] Saltelli A., Making best use of model evaluations to compute\nsensitivity indices, Computer Physics Communications, 2002, Vol.\n145(2), pp. 280-297.\n[6] Kaliatka A., U\u253c\u00edpuras E., Vai\u253c\u00ednoras M., Uncertainty and sensitivity\nanalysis of water hammer phenomenon by employing the UMSICHT\ntest facility data, Proceedings of 11th International Topical Meeting\non Nuclear Reactor Thermal Hydraulics (NURET H-11), October 2-\n6, 2005, Avignon, France, pp. 1-12.\n[7] Kaliatka A., U\u253c\u00edpuras E., Vai\u253c\u00ednoras M., Uncertainty and sensitivity\nanalysis of parameters affecting water hammer pressure wave\nbehaviour, Kerntechnik, 2006, Vol. 71, No. 5-6, pp. 270-278.\n[8] Kaliatka, A., Kopustinskas V., Vai\u253c\u00ednoras M., Water hammer model\nsensitivity study by the FAST method, Energetika, 2009, T. 55, Nr. 1,\npp. 13-19.\n[9] http:\/\/www.haestad\/Hammer User's Guide\n[10] Neshan, Hamidreza, Water Hammer, 1st Edition, Publication of Pump\nManufacturing Industries Company, Tehran, Iran,\n1985.http:\/\/www.mechanicab.com\n[11] Wylie E. B., Streeter V. L., Suo L., Fluid Transients in Systems,\nPrentice-Hall Inc., Englewood Cliffs, New Jersey, USA, 1993.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 49, 2011"}