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Study on the Organic Rankine-EVI (with efficiency by secondary suction) Vapor Compression Refrigeration Cycle System Powered by Solar Energy
Received date: 2014-07-02
Revised date: 2014-08-28
Online published: 2014-10-30
To utilize solar energy efficiently, a thermodynamic model of Rankine-EVI (with efficiency by secondary suction) Vapor Compression refrigeration system was established. Under the proposed working conditions, working fluid R236fa, R245fa, RC318 and R141b were selected and compared by investigating the effects of generating temperature, condensation temperature, condensing temperature, evaporation temperature, expander isentropic expansion efficiency and compressor isentropic compression efficiency on the system performance to identify suitable working fluid which may yield high system efficiencies. The calculated results showed that R141b was the most appropriate working fluid for the system. Condensation temperature and condensing temperature had important influences on system performance. The COPs reached 0.2528 when the generating temperature was 85oC, the condensation temperature was 40oC, the condensing temperature was 40oC and the evaporation temperature was −15oC. The application of EVI technology has a great advantage in north areas with rich solar energy and low ambient temperature.
Key words: solar energy; Rankine-EVI; Vapor Compression; refrigeration
SHAO Zhen-hua , YU Wen-yuan , CHEN Xiao-jiao , Dong Ru-xi . Study on the Organic Rankine-EVI (with efficiency by secondary suction) Vapor Compression Refrigeration Cycle System Powered by Solar Energy[J]. Advances in New and Renewable Energy, 2014 , 2(5) : 373 -379 . DOI: 10.3969/j.issn.2095-560X.2014.05.008
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