Performance analysis and optimization of organic Rankine cycle (ORC) for waste heat recovery

• Published in: Energy conversion and management Vol. 48; no. 4; pp. 1113 - 1119
• Main Authors: Wei, Donghong, Lu, Xuesheng, Lu, Zhen, Gu, Jianming
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-04-2007; Elsevier
• Subjects: Applied sciences; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Organic Rankine cycle (ORC); Performance analysis; Transport and storage of energy; Waste heat; Waste heat; Organic Rankine cycle (ORC); Performance analysis; Thermodynamics; System performance; Efficiency; Rankine cycle; Performance; System analysis; Organic Rankine cycle; Optimization; Heat recovery
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2006.10.020

The system performance analysis and optimization of an organic Rankine cycle (ORC) system using HFC-245fa (1,1,1,3,3-pentafluoropropane) as working fluid driven by exhaust heat is presented. The thermodynamic performances of an ORC system under disturbances have been analyzed. The results show: maximizing the usage of exhaust heat as much as possible is a good way to improve system output net power and efficiency; the degree of sub-cooling at the condenser outlet should be small (0.5–0.6
K); when the ambient temperature is too high, the system output net power and efficiency will deteriorate with the departure from nominal state possibly exceeding 30%. According to the running environment, choosing a proper nominal state is a good idea for improving the system output net power and efficiency.