Study of a Combined Power and Ejector Refrigeration Cycle with Low-temperature Heat Sources by Applying Various Working Fluids

2nd International Conference on Green Energy Technology

能源学;生态环境科学

Jafarmadar, S.^1 ; Habibzadeh, A.^1

Mechanical Engineering Department, Urmia University, Urmia, Iran^1

关键词: Ejector refrigeration;    Evaporator temperature;    Heat source temperatures;    Low temperature heat sources;    Organic Rankine cycles;    Second law analysis;    Turbine inlet temperature;    Waste heat energy sources;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/83/1/012008/pdf
DOI  :  10.1088/1755-1315/83/1/012008

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

A power and cooling cycle which combines the organic Rankine cycle and the ejector refrigeration cycle supplied by waste heat energy sources is discussed in this paper. Thirteen working fluids including one wet, eight dry and four isentropic fluids are studied in order to find their performances on the combined cycle. First and second law analysis has been performed by using a computer program in order to investigate various operating conditions' effects on the proposed cycle by fixing power/refrigeration ratio and varying waste heat source and evaporator temperature. According to the results, in general, dry and isentropic ORC fluids have better performance compared with wet fluids. The increase in evaporator temperature leads to the decrease in exergy efficiency. On the other hand, exergy efficiency rises with the turbine inlet temperature decrease and an increase of heat source temperature. Rising expansion ratio and inlet temperature of the turbine causes an increase in the thermal efficiency of the cycle.