Comparative performance of closed cycle gas turbine engine with heat recovery using different gases |
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| Affiliation: | 1. College of Civil Engineering, National Center for International Research Collaboration in Building Safety and Environment, Hunan University, Changsha, Hunan 410082, China;2. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing 102206, China;1. SINTEF Energy Research, Kolbjoern Hejes vei 1B, Trondheim NO-7491, Norway;2. Department of Energy and Process Engineering, Norwegian University of Science and Technology, Kolbjoern Hejes vei 1.A, Trondheim NO-7491, Norway |
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| Abstract: | The unique features of the closed cycle gas turbine engine have been recently contributing towards its adoption in a multiplicity of applications such as power plants, space, and marine power supplies. Therefore, research is reactivated to serve its future developments.In this work, a performance analysis is carried out using different gases such as air, combustion gases, CO2 and helium. Operating variables are turbine inlet temperature T03, compressor pressure ratio Rc and inlet temperature T01. A computer program is taioored to calculate specific work Ws and overall efficiency ηo over a wide range of operating variables. Results show that helium gives relatively higher Ws, but ηo starts to drop early after a low optimum Rc. Air and combustion gases offer nearly equal performance. |
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