制冷技术Issue(3)：13-17,5.DOI:10.3969/j.issn.2095-4468.2012.03.103
家用空调微通道换热器流量分配特性研究
Flow Distribution Research of Microchannel Heat Exchanger in Domestic Air-conditioning System
李峰 1徐博 2杨涛 1汪年结 1陈江平2
作者信息
- 1. 四川长虹电器股份有限公司,绵阳 621000
- 2. 上海交通大学,上海 200240
- 折叠
摘要
Abstract
The impact of refrigerant properties on flow distribution was theoretically analyzed in this paper. Since the difference between gas and liquid phase on the density and viscosity of R290 is smaller than that of R22, R290 has theoretically a better flow distribution performance and smaller pressure-drop than R22. And with the increase of evaporating temperature, flow distribution performance of both refrigerants became better. According to the experimental study on two path arrangement samples of microchannel heat exchanger, R290 and R22 had close flow distribution performances, and R22 was better in 2-path sample, R290 was better in 4-path sample. Increasing the flow path from 2 to 4, flow distribution became better, the heat transfer of evaporator increased by 5%-6%, the heating capacity increased by 1.8%, and COP increased by 8%-10%. R290 showed a better flow distribution performance and had a bigger increase of heat transfer. Moreover R290 had smaller increase of pressure-drop. It is more suitable to multi-path heat transfer exchanger, to get more increase of COP.关键词
微通道换热器/热泵/R22/R290/流量分配Key words
Microchannel heat exchanger/Heat pump/R290/R22/Flow distribution引用本文复制引用
李峰,徐博,杨涛,汪年结,陈江平..家用空调微通道换热器流量分配特性研究[J].制冷技术,2012,(3):13-17,5.
