Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Study on the Heating Performance Characteristics of a Vapor Injection Heat Pump for Electric Vehicles

가스 인젝션을 적용한 전기자동차용 히트펌프의 난방성능 특성에 대한 실험적 연구

  • Kim, Dongwoo (Graduate School of Mechanical Engineering, Korea University) ;
  • Jung, Jongho (Graduate School of Mechanical Engineering, Korea University) ;
  • Kim, Yongchan (Department of Mechanical Engineering, Korea University)
  • 김동우 (고려대학교 기계공학과 대학원) ;
  • 정종호 (고려대학교 기계공학과 대학원) ;
  • 김용찬 (고려대학교 기계공학과)
  • Received : 2014.01.16
  • Accepted : 2014.05.08
  • Published : 2014.07.10
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Abstract

A heat pump has been considered as a thermal management unit for electric vehicles, including the heating and cooling of the cabin. However, the heat pump shows performance degradation at low outdoor temperatures or high compressor speeds. In this study, a R-134a heat pump for an electric vehicle was designed to improve system efficiency, by applying vapor injection with an internal heat exchanger. The heating performance characteristics of the vapor injection heat pump were analyzed at various compressor speeds and outdoor temperatures. The vapor injection heat pump showed 13.3% COP improvement over the non-injection heat pump, when the heating capacity was fixed at 5.2 kW. In addition, the heating capacity of the vapor injection system increased by 9.6%, as compared to the non-injection system.

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References

  1. Choi, Y. C., Lee, W. S., Park, M. H., and Choi, Y. H., 2011, Heating performance evaluations for development of heat pump system on battery electric vehicle, Proceedings of the KSAE 2011 Autumn Annual Conference, Vol. 11, pp. 559-563.
  2. Kim, K. Y., Kim, S. C., and Kim, M. S., 2012, Experimental studies on the heating performance of the PTC heater and heat pump combined system in fuel cells and electric vehicles, International Journal of Automotive Technology, Vol. 13, No. 6, pp. 971-977. https://doi.org/10.1007/s12239-012-0099-z
  3. Lee, D. Y., Cho, C. W., Won, J. P., Park, Y. C., and Lee, M. Y., 2013, Performance characteristics of mobile heat pump for a large passenger electric vehicle, Applied Thermal Engineering, Vol. 50, No. 1, pp. 660-669. https://doi.org/10.1016/j.applthermaleng.2012.07.001
  4. Woo, H. S., Ahn, J. H., Oh, M. S., Kang, H., and Kim, Y. C., 2013, Study on the heating performance characteristics of a heat pump system utilizing air and waste heat source for electric vehicles, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 25, No. 4, pp. 180-186. https://doi.org/10.6110/KJACR.2013.25.4.180
  5. Xu, X., Hwang, Y. H., and Radermacher, R., 2011, Refrigerant injection for heat pumping/air conditioning systems: Literature review and challenges discussions, International Journal of Refrigeration, Vol. 34, No. 2, pp. 402-415. https://doi.org/10.1016/j.ijrefrig.2010.09.015
  6. Heo, J. H., Jeong, M. W., Baek, C. H., and Kim, Y. C., 2011, Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection, International Journal of Refrigeration, Vol. 34, No. 2, pp. 444-453. https://doi.org/10.1016/j.ijrefrig.2010.10.003
  7. Kim, M. S. and Kim, M. S., 2013, A study of the comparison between vapor injection heat pump systems using a sub-cooler and a flash tank in the performance improvement potential for electric vehicle heating, Proceedings of the KSAE 2013 Spring Annual Conference, Vol. 2013, No. 5, pp. 682-682.
  8. Heo, J. H., Kang, H., and Kim, Y. C., 2012, Optimum cycle control of a two-stage injection heat pump with a double expansion sub-cooler, International Journal of Refrigeration, Vol. 35, No. 1, pp. 58-67. https://doi.org/10.1016/j.ijrefrig.2011.09.005
  9. Feng, C., Jiyou, F., Ziwen, X., and Liansheng, L., 2009, Study on performance of a heat pump water heater using suction stream liquid injection, Applied Thermal Engineering, Vol. 29, No. 14-15, pp. 2942-2948. https://doi.org/10.1016/j.applthermaleng.2009.03.001
  10. Roh, C. W., Yoo, J. W., and Kim, M. S., 2014, Vapor refrigerant injection techniques for heat pump systems: the latest literature review and discussion, International Journal of Air-Conditioning and Refrigeration, Vol. 22, No. 1, pp. 1430002-1-1430002-9. https://doi.org/10.1142/S201013251430002X
  11. Aikins, K. A., Lee, S. H., and Choi, J. M., 2013, Technology review of two-stage vapor compression heat pump system, International Journal of Air-Conditioning and Refrigeration, Vol. 21, No. 3, pp. 1330002-1-1330002-14. https://doi.org/10.1142/S2010132513300024
  12. Heo, J. H., 2010, The heating performance improvement of two-stage heat pumps with the vapor injection technique, Ph.D. thesis, Korea University, Seoul, Korea.

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