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Feasibility study of the 5 mm diameter tube-and-fin heat exchanger in automotive heat pump system.

[In Chinese. / En chinois.]

Author(s) : WEI W., ZHAO Y., CHEN J., et al.

Type of article: Article

Summary

The parallel flow microchannel (PFM) heat exchanger is widely used in automotive air conditioning system, but it has the disadvantage of frost easily and water draining is difficult during defrost. The traditional tube and fin heat exchanger can overcome the frost and defrost problem but has low efficiency. In this paper a 05 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 a benchmark test. Results show that the system with the 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 °C lower compressor discharge temperature in heat pump mode, which indicates that small diameter tube-and-fin heat exchanger is a promising solution for the automotive heat pump system of electric vehicles.

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Pages: 35-39

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