Performance evaluation of a low-temperature solar Rankine cycle system utilizing R245fa

Journal Article · Mon Mar 15 04:00:00 EDT 2010 · Solar Energy

DOI:https://doi.org/10.1016/J.SOLENER.2009.11.004· OSTI ID:21305685

Wang, X D; Zhao, L; Wang, J L; Zhang, W Z; Zhao, X Z; Wu, W ^[1]

---

1. Department of Thermal Energy and Refrigeration Engineering, School of Mechanical Engineering, Tianjin University, No. 92 Weijin Road, Tianjin 300072 (China)

A low-temperature solar Rankine system utilizing R245fa as the working fluid is proposed and an experimental system is designed, constructed and tested. Both the evacuated solar collectors and the flat plate solar collectors are used in the experimental system; meanwhile, a rolling-piston R245fa expander is also mounted in the system. The new designed R245fa expander works stably in the experiment, with an average expansion power output of 1.73 kW and an average isentropic efficiency of 45.2%. The overall power generation efficiency estimated is 4.2%, when the evacuated solar collector is utilized in the system, and with the condition of flat plate solar collector, it is about 3.2%. The experimental results show that using R245fa as working fluid in the low-temperature solar power Rankine cycle system is feasible and the performance is acceptable. (author)

• OSTI ID: 21305685
• Journal Information: Solar Energy, Journal Name: Solar Energy Journal Issue: 3 Vol. 84; ISSN 0038-092X; ISSN SRENA4
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
EFFICIENCY
EVACUATED COLLECTORS
EVALUATION
Expanders
FEASIBILITY STUDIES
FLAT PLATE COLLECTORS
ISENTROPIC PROCESSES
PERFORMANCE
POWER GENERATION
POWER RANGE 01-10 KW
R245fa
RANKINE CYCLE
TEMPERATURE RANGE 0273-0400 K
WORKING FLUIDS