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Researches on heat pump system using rotary compressor in electric vehicle.

Number: pap. 2132

Author(s) : SHI J., GAO T., LU B., et al.

Summary

In China, electric vehicles (EVs) are becoming increasing popular. With several years practical operation experiences, a lot of news reports reveal the existing electrical supplementary heating can dramatically impact the driving range of EVs under cold weather in north China. The high efficient electric heat pump (HP) system has become the research hotspot, but previous researches show the heat pump operation could supply adequate heating capacity only in mild weather conditions when the working fluid is R134a. Since the user can’t change environment temperature, choosing a high pressure working fluid to have better heating performance become a realistic choice. Now the aluminum scroll compressor is wildly used in EVs, but because of the material and structure, it can’t endure the long term high pressure operation. This paper adopts the low cost steel rotary compressor and high pressure working fluid to build the EV HP system. The heat pump cycles using R134a, R407c, and R290 have been theoretically analyzed. Simulation results show, compared to R134a, using R290 the heating capacity can dramatically improve 51.3% and COP can improve 3.7%. Using R407c, the heating capacity also can increase 46.1%. The 24 cc R134a rotary compressor EV HP system and 21 cc R407c rotary compressor EV HP system has been built, the experiment results the heating capacity of R407c increased by 21.6~31.3%, and the COP of R407c increased by 34.3~37.5% under different conditions. The 21 cc R407c system under -10°C ambient temperature can have heat capacity of 2.59 kW and COP of 1.88 at 6000 RPM.

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Pages: 9 p.

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Details

  • Original title: Researches on heat pump system using rotary compressor in electric vehicle.
  • Record ID : 30018824
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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