Experimental investigation of an ejector-enhanced auto-cascade refrigeration system
Experimental investigation of an ejector-enhanced auto-cascade refrigeration system
复制标题
喷射增强型自动复叠制冷系统的实验研究
DOI：
10.1016/j.applthermaleng.2017.10.053
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发表时间：
2018-01-25
影响因子：
6.4
通讯作者：
Yu, Jianlin
中科院分区：
文献类型：
--
作者：
Bai, Tao;Yan, Gang;Yu, Jianlin
本文对采用共沸制冷剂R134a/R23的喷射器增强型自串级制冷循环（EARC）进行了实验研究。在选定的操作条件下，对EARC和两种常规循环进行了性能比较。研究了环境温度、混合料的带电质量分数比、节流阀开度和热负荷对EARC性能特性的影响。结果表明，与常规循环相比，EARC在制冷温度较低和能量利用效率较高方面具有优势，其性能系数（COP）和火用效率分别提高了9.6%和25.1%。节流阀开度相对于最大系统火用效率的确定是最优的。提出了最佳质量分数比为0.70/0.30的制冷剂R134a/R23。(C) 2017 Elsevier Ltd.版权所有。
This study presents the experimental investigation of an ejector-enhanced auto-cascade refrigeration cycle (EARC) with zeotropic refrigerant R134a/R23. Performance comparisons among the EARC and two conventional cycles were conducted at selected operating conditions. The effects of ambient temperature, charged mass fraction ratio of the mixture, throttle valve opening, and heat load on the performance characteristics of the EARC were investigated. The results indicated that the EARC had more advantages in terms of lower refrigeration temperature and higher energy utilization efficiency over the conventional cycles, and the coefficient of performance (COP) and exergy efficiency improvements of the EARC reached up to 9.6% and 25.1%, respectively. The throttle valve opening was optimal with respect to the maximum system exergy efficiency determination. The refrigerant R134a/R23 with the optimal mass fraction ratio of 0.70/0.30 was proposed. (C) 2017 Elsevier Ltd. All rights reserved.