基于有机朗肯循环的低温地热制冷系统热力学分析
收稿日期: 2014-03-05
修回日期: 2014-04-23
网络出版日期: 2014-04-30
基金资助
国家高技术研究发展计划（863）项目（2012AA053003）；国家自然科学基金资助项目（51106161）；广东省中国科学院全面战略合作项目（2012B091100263）；广州市珠江科技新星专项（2014J2200079）
Thermodynamic Analysis of a Rankine Cycle Powered Refrigeration System using Low-Temperature Geothermal Energy
Received date: 2014-03-05
Revised date: 2014-04-23
Online published: 2014-04-30
胡冰 , 马伟斌 . 基于有机朗肯循环的低温地热制冷系统热力学分析[J]. 新能源进展, 2014 , 2(2) : 122 -128 . DOI: 10.3969/j.issn.2095-560X.2014.02.007
To efficiently utilize low-temperature geothermal energy, an organic Rankine cycle-vapor compression refrigeration (ORC-VCR) system was employed and a thermodynamic model was developed. Six working fluids of R290, R600, R600a, R601, R601a and R1270 were analyzed and evaluated in order to identify suitable working fluids which may yield high system efficiencies. The overall COP and working fluid mass flow rate of per kW cooling capacity are chosen as key performance indicators. The calculated results show that R601 is the best working fluid for the ORC-VCR system as the geothermal water temperature is between 60oC and 90oC, the condensation temperature ranges from 30oC to 55oC and the evaporation temperature varies from 30oC to 55oC. When the geothermal water temperature reaches 90oC and the other input parameters are in typical values, the overall COP of the R601 case reaches 0.49.
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