Impacts of Selection of Zeotropic Mixture on Performance of ORC System
[1]Ma Xinling,Lian Qifei,Lei Meng,et al.Impacts of Selection of Zeotropic Mixture on Performance of ORC System[J].Journal of Zhengzhou University (Engineering Science),2021,42(06):62-68.[doi:10.13705/j.issn.1671-6833.2021.04.015]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
42
Number of periods:
2021 06
Page number:
62-68
Column:
Public date:
2021-11-10
- Title:
- Impacts of Selection of Zeotropic Mixture on Performance of ORC System
- Keywords:
- waste heat utilization; organic Rankine cycle; zeotropic mixtures; grey correlation method
- CLC:
- -
- DOI:
- 10.13705/j.issn.1671-6833.2021.04.015
- Abstract:
- The process model of ORC system was established with Aspen Plus software to investigate the impacts of zeotropic mixtures on system performance. The thermal performance and economic performance of mixtures were studied when 60～100 ℃ evaporation temperature, and the system performance was comprehensively analyzed based on the gray correlation method. The results showed that the performance of many mixtures was better than their pure working fluids, especially 3R600a/7R601a. When evaporation temperature was 100 ℃, the grey correlation grade of 3R600a/7R601a reached the maximum 0.994, and its net output power, thermal efficiency, LEC were 56.59 kW, 11.76%, and 0.1312 width=5,height=12,dpi=110/kWh, respectively. Compared with the pure working fluid R600a, the net output power and thermal efficiency were increased by 31.73% and 11.05% respectively, LEC was decreased by 11.06%. The result showed that the target pure working fluid was mixed with another new working fluid with similar output power to obtain a zeotropic mixture with a large temperature glide, and the zeotropic mixture could significantly improve the performance of ORC system.
- References:
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Last Update:
2021-12-17