摘要
理论上在R134a汽车空调系统中使用回热管可显著提升制冷性能,但有实验研究表明回热管的使用对系统产生了不利影响,抵消了收益,使得制冷性能提升不明显且存在一定安全性风险。本文使用空调系统综合性能实验台对不同长度回热管进行对比实验研究,得到了系统不利影响与管长的关系。此外,本文通过膨胀阀调节实验、冷凝风量控制实验和油量控制实验,得到对该不利影响的规避方法,为回热系统匹配调节提供了一定的理论依据。
In theory, using internal heat exchanger in the R134a vehicle air conditioning system can improve the cooling performance significantly,but many experimental studies demonstrates that the internal heat exchanger has a negative effect on the safety of the system. Therefore the advantage and the disadvantage trade off, which makes the merit not conspicuous. Aimed at this situation, the influence of different length of internal heat exchanger on the air conditioning system comprehensive performance is investigated in test bench in this paper. It shows that the adverse effects have certain relationships with the tube length on the basis of the experiments. In addition, this study also obtain a method to avoid adverse effects, by adjusting the expansion valve, condenser air flow and oil, which provides theoretical foundation for the matching of heat regeneration system.
出处
《制冷学报》
CAS
CSCD
北大核心
2016年第5期26-32,共7页
Journal of Refrigeration
基金
国家自然科学基金(51076048)资助项目~~
关键词
回热循环
汽车空调
回热管
R134A
优化
heat regenerative cycle
vehiele air conditioning system
internal heat exchanger
R134a
optimization
