{"title":"Modelling of Organic Rankine Cycle for Waste Heat Recovery Process in Supercritical Condition","authors":"Jahedul Islam Chowdhury, Bao Kha Nguyen, David Thornhill, Roy Douglas, Stephen Glover","volume":99,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":477,"pagesEnd":483,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10000747","abstract":"
Organic Rankine Cycle (ORC) is the most commonly used method for recovering energy from small sources of heat. The investigation of the ORC in supercritical condition is a new research area as it has a potential to generate high power and thermal efficiency in a waste heat recovery system. This paper presents a steady state ORC model in supercritical condition and its simulations with a real engine’s exhaust data. The key component of ORC, evaporator, is modelled using finite volume method, modelling of all other components of the waste heat recovery system such as pump, expander and condenser are also presented. The aim of this paper is to investigate the effects of mass flow rate and evaporator outlet temperature on the efficiency of the waste heat recovery process. Additionally, the necessity of maintaining an optimum evaporator outlet temperature is also investigated. Simulation results show that modification of mass flow rate is the key to changing the operating temperature at the evaporator outlet.<\/p>\r\n","references":"[1]\tA. Boretti, \u201cRecovery of exhaust and coolant heat with R245fa organic Rankine cycles in a hybrid passenger car with a naturally aspirated gasoline engine,\u201d Applied Thermal Engineering, vol. 36, pp. 73-77, April 2012.\r\n[2]\tS. Glover, R. Douglas, L. Glover and G. McCullough, \u201cPreliminary analysis of organic Rankine cycles to improve vehicle efficiency,\u201d Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, vol. 228, no. 10, pp. 1142-1153, April 2014.\r\n[3]\tH. Gao, C. Liu, C. He, X. Xu, S. Wu and Y. Li, \u201cPerformance Analysis and Working Fluid Selection of a Supercritical Organic Rankine Cycle for Low Grade Waste Heat Recovery,\u201d Energies 2012, vol. 5, pp. 3233-3247, Aug. 2012.\r\n[4]\tJ. Zhang, Y. Zhou, Y. Li, G. Hou and F. 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