A theoretical model for a gas injection heat pump used in electric vehicles

Jongho Jung, Dongwoo Kim, Jae Hwan Ahn, Yong Chan Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Since electric vehicles are handicapped by limited battery power, the HVAC system in electric vehicles significantly impacts its power consumption and driving range. This can be more serious in winter. A heat pump can be suggested for improving the heating performance of the HVAC system in an electric vehicle. In this study, a heat pump using gas injection technique with phase separator was investigated theoretically in the electric vehicle to improve the heating capacity and efficiency at low ambient temperature. A simulation model for this system was developed and validated with the experimental data. It was used to analyze the effects of gas injection technique on the system performance and compressor stability. The simulation results were consistent with the measured data. The results showed that the gas injection technique improved the performance and efficiency of the electric vehicle heat pump. The heating capacity and COP were improved by approximately 22% and 19%, respectively, at the outdoor temperature of -20°C due to the use of the gas injection technique.

Original languageEnglish
Title of host publicationACRA 2014 - Proceedings of the 7th Asian Conference on Refrigeration and Air Conditioning
PublisherSociety of Air-conditioning and Refrigerating Engineers of Korea, SAREK
Publication statusPublished - 2014
Event7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014 - Jeju Island, Korea, Republic of
Duration: 2014 May 182014 May 21

Other

Other7th Asian Conference on Refrigeration and Air Conditioning, ACRA 2014
CountryKorea, Republic of
CityJeju Island
Period14/5/1814/5/21

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Control and Systems Engineering
  • Mechanical Engineering

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  • Cite this

    Jung, J., Kim, D., Ahn, J. H., & Kim, Y. C. (2014). A theoretical model for a gas injection heat pump used in electric vehicles. In ACRA 2014 - Proceedings of the 7th Asian Conference on Refrigeration and Air Conditioning Society of Air-conditioning and Refrigerating Engineers of Korea, SAREK.