Effects of the nozzle throat diameter on a bi-evaporator compression/ejection refrigeration system

被引：0
作者：
Huadong Liu
Hao Dang
Zhaoyang Jin
Xinli Wei
Zhe Li
Hailu Shi
机构：
[1] Zhengzhou University,School of Mechanical and Power Engineering
来源：
Heat and Mass Transfer | 2022年 / 58卷
关键词：
Nozzle throat diameter; Ejector; BCERC; COP;
D O I：
暂无
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学科分类号：
摘要：
In this study, the ejector was used to reduce throttling losses in the bi-evaporator compression/ejector refrigeration cycle (BCERC) using R134a refrigerant. Effects of the nozzle throat diameter on the performance of ejector and the BCERC were investigated experimentally under different working conditions. This experiment further investigated the effects of operating parameters on the BCERC by changing the inlet temperature of the condenser and the high-temperature evaporator. The performances of the BCERC and the vapor compression refrigeration cycle are also compared under the same external operating conditions. The results show there exists an optimal nozzle throat diameter of 1.9 mm which makes the maximum value of the ejector pressure lifting ratio (PLR), the system cooling capacity and the coefficient of performance (COP). In order to ensure a high cooling capacity and COP of the system, the inlet water temperature of the condenser should be controlled within the range of 25 ℃ to 35 ℃ and the inlet water temperature of the high-temperature evaporator should be greater than 14 ℃. At the optimum the nozzle throat diameter, the BCERC exhibits a higher COP than the vapor compression refrigeration cycle by 10.2% ~ 27.8%.
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页码：2207 / 2219
页数：12
相关论文
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