Performance investigation of CO2 automotive air-conditioning system with ejector at 45 °C ambient temperature

被引：1
|
作者：
Yang, Tianyang [1 ,2 ,3 ]
Yang, Yunchun [1 ,2 ,3 ]
Zou, Huiming [1 ,2 ,3 ]
Tian, Changqing [1 ,2 ,3 ]
Butrymowicz, Dariusz [4 ]
机构：
[1] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Technol Space Energy Convers, Beijing 100190, Peoples R China
[2] Chinese Acad Sci, Key Lab Cryogen, Beijing 100190, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[4] Bialystok Tech Univ, Wiejska 45C, PL-15351 Bialystok, Poland
来源：
INTERNATIONAL JOURNAL OF REFRIGERATION | 2024年 / 162卷
基金：
中国国家自然科学基金;
关键词：
CO2; E<acute accent>jecteur; Performance de refroidissement; Syste`me thermique automobile; Ve<acute accent>hicule e<acute accent>lectrique; REFRIGERATION CYCLE; IMPROVEMENT;
D O I：
10.1016/j.ijrefrig.2024.04.001
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The ejector-expansion system design is an effective approach to improve the cooling performance of transcritical CO2 systems. In this study, a transcritical CO2 air-conditioning system with an ejector for electric vehicles is built up to experimentally investigate the cooling performance at an extreme temperature of 45 degrees C. The performance improvement is evaluated compared to the corresponding basic system. The effects of electronic expansion valve's (EXV) opening, compressor speed, and fresh air ratio are analyzed. The results show that the ejector can effectively improve system COP by 4.61-16.52 % under test conditions. At 45 degrees C/27 degrees C (out-cabin/in-cabin) condition, the optimal COP of 1.52 can be obtained at EXV's opening of 65 %. The entrainment ratio significantly goes up from 0.22 to 0.60 as EXV's opening increases.
引用
收藏
页码：99 / 107
页数：9
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