Performance analysis on solar-powered gax-ejector heat pump

被引：0
作者：
Dai E. [1 ]
Dai Y. [1 ]
机构：
[1] Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2021年 / 42卷 / 11期
关键词：
Ammonia/water pairs; Ejectors(pumps); GAX cycle; Heat pump systems; Solar energy;
D O I：
10.19912/j.0254-0096.tynxb.2019-1187
中图分类号：
学科分类号：
摘要：
A new solar-powered absorption-ejector heat pump system (GAX-E) is proposed, which uses GAX cycle and ejector combination to make the absorption pressure higher than the evaporation pressure. On one hand, it enables the GAX absorption heat pump to work at lower ambient temperatures; on the other hand, the performance of the cycle under low temperature condition is improved. The solar subsystem is a parabolic trough collector. This paper analyzes the standard operating conditions and variable operating conditions of the GAX-E heat pump below -15℃. Results show that COP reaches 1.52 and SCOP reach 72.02% in standard condition. Besides, the system requires high direct radiation intensity. When the DNI is less than 550 W/m2, the coefficient of performance is not as high as that of heating by parabolic trough collector directly. Therefore, it is necessary to select areas with abundant solar radiation resources. Otherwise it is necessary to combine natural gas or other auxiliary heat sources. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
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页码：111 / 116
页数：5
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