热气旁通制冷系统除霜特性的仿真研究  

Simulation research on defrosting characteristics of hot gas bypass refrigeration system

作　　者：毕笑维 刘向农 冯小桃 何睿祺 董婷 Bi Xiaowei;Liu Xiangnong;Feng Xiaotao;He Ruiqi;Dong Ting(School of Automotive and Traffic Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学汽车与交通工程学院,合肥230009

出　　处：《低温与超导》2021年第5期91-96,共6页Cryogenics and Superconductivity

摘　　要：为了研究空气源热泵热气旁通在不同旁通阀开度下的除霜特性,以带热气旁通的汽车热泵空调系统为研究对象,结合实验数据建立系统稳态仿真模型,并通过模型仿真研究系统在一个除霜周期内不同开度下的除霜能量、除霜时间和平均COP。研究表明,除霜能量随开度增加呈现线性增大,当旁通流量为60%时,除霜能量可达321.7 W;除霜时间随开度增加而减小并趋于平缓;系统的最佳旁通开度为45%,此时系统在一个除霜周期内的平均COP可达1.957。In order to study the defrosting characteristics of the hot gas bypass of the air source heat pump under different bypass valve openings, an automobile heat pump air conditioning system with the hot gas bypass was taken as the research object, the experimental data was combined to establish a steady-state simulation model of the system, and through the model to research the system’s defrost energy, defrost time and average COP at different openings in a defrost cycle. The results show that the defrosting energy increases linearly with the increase of the opening. When the bypass flow rate is 60 %, the defrosting energy can reach 321.7 W;the defrosting time decreases with the increase of the opening and tends to be flat;the best bypass opening is 45 %, and the average COP of the system in a defrost cycle can reach 1.957.

关 键 词：空气源热泵 热气旁通 除霜 仿真 R134A制冷剂 

分 类 号：TB657.2[一般工业技术—制冷工程]