Energy and Exergy Analysis of a Cooling/Power Cogeneration Ejector Refrigeration System  

作　　者：YANG Mengke LI Xiuzhen WANG Lin YUAN Junfei WANG Zhanwei LIANG Kunfeng 

机构地区：[1]Institute of Refrigeration and Air conditioning,Henan University of Science and Technology,Luoyang 471023,China

出　　处：《Journal of Thermal Science》2022年第2期448-462,共15页热科学学报（英文版）

基　　金：financially supported by the National Natural Science Foundatio of China(Grant No.51876055,51806060,and 51706061);the Natural Science Foundation of Henan Province(182300410233)。

摘　　要：The organic Rankine cycle is introduced into the conventional ejector refrigeration(CER)system to establish the low-grade heat-driven cooling/power cogeneration ejector refrigeration(CPC-ER)system using the isobutane as the refrigerant.In comparison with the CER system where external power is consumed by the circulating pump,the power output from the CPC-ER system is more than the power consumption of its circulating pump so that a portion of net power is derived from the CPC-ER system.Based on the mathematical model of thermodynamics,energy and exergy analysis of the CPC-ER system is carried out and compared with the CER system.The results reveal that the equivalent coefficient of performance(COP)of the CPC-ER system is 41.14%to 71.30%higher than that of the CER system,and the exergy efficiency of the CPC-ER system is 1.32 to 1.49 times higher than that of the CER system.Both the power produced by the turbine and the total exergy output from the CPC-ER system approach the maximum,as the generating temperature in the generator is up to 80°C.The CPC-ER system has the higher energy utilization efficiency than the CER system,and it is suitable for the cooling and power-required places with low-grade thermal sources.

关 键 词：ejector refrigeration EXERGY power consumption equivalent COP 

分 类 号：TB657[一般工业技术—制冷工程]