| 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?5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 |
| DOI： |
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| 基金项目: |
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| Feasibility Study of the Ø5 Tube-and-fin Heat Exchanger in Automotive Heat Pump System |
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Wei Wei1, Zhao Yu1, Chen Jiangping1, Song Ji2, Gao Yifeng2
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| (1.Inst. of Refrigeration and Cryogenics, Shanghai Jiao Tong Univ.;2.International Copper Association Shanghai Office) |
| 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 ?5 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 temperature in heat pump mode, which indicates that small diameter tube-and-fin heat exchanger is a promising solution to the automotive heat pump system of electric vehicle. |
| Key words: electric vehicle air conditioning heat pump small diameter tube-and-fin heat exchanger electric compressor COP |
