车用热泵用小管径管片式换热器性能研究.PDF

34  Vol.34,No.1 第 卷 第 期 车用热泵用小管径管片式换热器性能研究 203 2 February. 2013 年 月 0253-4339 2013 01-0035-05 文章编号： ( ) - doi：10.3969/j.issn. 0253 4339. 2013. 01. 035 车用热泵用小管径管片式换热器性能研究 韦 伟1 赵 宇1 陈江平1 宋 吉2 高屹峰2 (1 上海交通大学制冷与低温工程研究所 上海 200240；2 国际铜业协会上海代表处 上海 200020) 摘 要 目前车用空调冷凝器均为平行流冷凝器，作为热泵蒸发器时易结霜，且化霜时排水不畅。而圆管翅片换热器换热性 能较差，难以满足结构布置要求。开发了Ø5管径的小管径换热器，与平行流换热器进行了性能对比测试。结果表明:采用小 管径管片式换热器时，制冷模式下COP提高了17.4%~23.7%，热泵模式下COP提高12.6%~35.8%，且在热泵模式下可降低压 缩机排气温度15~28℃。小管径管片式换热器在电动汽车热泵系统应用前景广阔。 关键词 电动汽车空调；热泵；小管径管片式换热器；电动压缩机；COP 中图分类号：U463.851; TB657.5 文献标识码：A Feasibility Study of the Ø5 Tube-and-fin Heat Exchanger in Automotive Heat Pump System Wei Wei1 Zhao Yu1 Chen Jiangping1 Song Ji2 Gao Yifeng2 (1. Inst. of Refrigeration and Cryogenics, Shanghai Jiao Tong Univ., Shanghai, 200240, China; 2. International Copper Association Shanghai Office, Shanghai, 200020, China) Abstract The parallel flow microchannel (PFM) heat exchanger is widely used in automotive air conditioning system, but it has the disadvantage of easy-frost and difficult in water-drain in defrost . The traditional tube and fin heat exchanger can overcome the frost and defrost problem but has low efficiency. In this paper a Ø5 tube and fin heat exchanger is developed for the automotive heat pump. Performances of small diameter tube-and-fin heat exchanger and PFM heat exchanger are compared based on benchmark test. Results show that the system with small diameter tube-and-fin heat exchanger has 17.4%~23.7% higher COP in air conditioning mode, 12.6%~35.8% higher COP and 15~28 ℃ lower compressor discharge t