Influence of internal heat exchanger position on the performance of ejector-enhanced auto-cascade refrigeration cycle for the low-temperature freezer
Influence of internal heat exchanger position on the performance of ejector-enhanced auto-cascade refrigeration cycle for the low-temperature freezer
复制标题
低温冷冻库内部换热器位置对喷射增强自动复叠制冷循环性能的影响
DOI：
10.1016/j.energy.2021.121803
复制
发表时间：
2022-01
期刊：
影响因子：
9
通讯作者：
Yu Jianlin
中科院分区：
文献类型：
--
作者：
Bai Tao;Yan Gang;Yu Jianlin
本文介绍了一种用于-80 °C冰箱的喷射器增强自复叠制冷循环的热力学研究。基于遗传算法对四种不同位置的IHX的改进循环进行了性能比较。采用天然二元混合物R1150/R600 a作为工作流体。仿真结果表明，在蒸发器出口加入IHX可以提高系统的整体性能，且在蒸发器出口加入IHX比在冷凝器出口加入IHX更能提高系统的性能。优化后的循环在冷凝器和蒸发器出口同时采用双IHX，性能改善最为显著。与未加IHX的循环相比，平均COP和（火用）效率提高了55.2%，压缩机排量和系统初投资分别降低了52.9%和17.5%。在冷凝器出口处应用IHX后，压升比增大，雾沫夹带比减小。理论研究结果为改进喷射式超低温冷冻机在-80 °C冷冻应用中的性能提供了指导。
This paper presents a thermodynamic investigation on the configuration optimization of the ejector-enhanced auto-cascade refrigeration cycles for −80 °C freezers. The performance comparisons based on the genetic algorithm are carried out among four different modified cycles with differently positioned IHX. The natural binary mixture R1150/R600a is used as the working fluid. The simulation results illustrate that adding IHX could improve the overall system performance, and adopting IHX at the evaporator outlet is more effective for performance enhancement than that at the condenser outlet. The most significant performance improvements are obtained in the optimized cycle, which simultaneously adopts the dual-IHX at the condenser and evaporator outlets. Compared to the cycle withnot IHX, the average COP and exergy efficiency improvements reach up to 55.2%, and the compressor displacement and system initial capital cost are reduced by 52.9% and 17.5%, respectively. The pressure lift ratio increases, and the entrainment ratio declines due to the application of the IHX at the condenser outlet. Theoretical results provide a guide for improving the ejector-enhanced ultra-low temperature freezer in the applications of the −80 °C freezing.
登录
查看更多内容
DOI：
10.1016/s0140-7007(01)00110-4
发表时间：
2002-12
期刊：
International Journal of Refrigeration-revue Internationale Du Froid
影响因子：
--
作者：
S.G Kim;M.S Kim
通讯作者：
S.G Kim;M.S Kim
喷射膨胀跨临界CO2制冷循环内换热器效果的理论评价
影响因子：
6.4
作者：
Zhang, Zhen-ying;Ma, Yi-tai;Wang, Hong-li;Li, Min-xia
通讯作者：
Li, Min-xia
低温冷冻库喷射增强自动复叠制冷系统下拉性能实验研究
影响因子：
9
作者：
Tao Bai;Gang Yan;Jianlin Yu
通讯作者：
Jianlin Yu
DOI：
10.1016/s0140-7007(97)00025-x
发表时间：
1997-08
期刊：
International Journal of Refrigeration-revue Internationale Du Froid
影响因子：
--
作者：
O. Brunin;M. Feidt;B. Hivet
通讯作者：
O. Brunin;M. Feidt;B. Hivet
影响因子：
2.1
作者：
Qin Wang;Rui Liu;Jiangpu Wang;Fusheng Chen;Xiaohong Han;Guangming Chen
通讯作者：
Qin Wang;Rui Liu;Jiangpu Wang;Fusheng Chen;Xiaohong Han;Guangming Chen