期刊
APPLIED THERMAL ENGINEERING
卷 89, 期 -, 页码 323-331出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2015.06.024
关键词
Organic Rankine cycle; Low-medium temperature geothermal; Zeotropic mixtures; Performance analysis
资金
- National High Technology Research and Development Program of China (863 Program) [2012AA053001]
The selection of working fluids is one of the important approaches to optimize the performance of an organic Rankine cycle (ORC). In order to select appropriate working fluids, zeotropic mixtures were investigated in this paper by theoretical analysis and detailed numerical simulation. Since the flame retardancy of fluoride can overcome the strong flammability of HCs, the mixtures of HFCs and HFOs with HCs were particularly investigated. The influences of 10 groups of mixtures on the performance of ORC were analyzed. The results show that the maximum net power output of the ORC using each mixture corresponds to an optimal mixture ratio that gives a highest temperature glide. In addition, an optimal evaporating temperature exists. It was found that R245fa/R600a (0.9/0.1) was the most preferable mixture among the working fluids within the scope of this research. (C) 2015 Elsevier Ltd. All rights reserved.
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