Thermodynamic Analysis of a Rankine Cycle Powered Refrigeration System Using Mid-Low Temperature Geothermal Sources

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Hu, Bing^1,2

Dongguan University of Technology, China^1

Guangdong Provincial Key Lab of Distributed Energy Systems, China^2

关键词: Geothermal sources;    Geothermal water;    Low-temperature geothermal;    Organic Rankine cycles;    Refrigeration system;    System efficiency;    Thermo dynamic analysis;    Thermodynamic model;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/4/042094/pdf
DOI  :  10.1088/1755-1315/170/4/042094

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

To efficiently utilize mid-ow temperature geothermal sources, 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.,and system design and influencing factors were researched with the overall COP and working fluid mass flow rate of per kW cooling capacity as key performance indicators.The results show that R601 is the best working fluid for the ORC/VCR system as the geothermal water temperature is between 60 to 90 °C, When the geothermal water temperature reaches 90 °C and the other input parameters are in typical values, the overall COP of the R601 case reaches 0.48.