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Performance improvement of a dehumidifying heat pump using an additional waste heat source in electric vehicles with low occupancy

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  • Ahn, Jae Hwan
  • Lee, Joo Seong
  • Baek, Changhyun
  • Kim, Yongchan

Abstract

A DHP (dehumidifying heat pump) has been proposed to save energy consumption in electric vehicles during the dehumidifying and heating operation. Since the mean occupancy rate in a vehicle is less than two people, it is required to optimize the performance of the DHP at low occupancy for an effective operation. The objective of this study is to investigate the performance improvement of a DHP by using the additional waste heat source in electric vehicles with low occupancy. The experiments on the DHP were conducted by varying operating modes, according to various numbers of passengers. Even though the air source DHP in an AL (alternating) mode showed 7.6% lower heating capacity on average, compared to that in the DH (dehumidifying and heating) mode, the COP improvement of the air source DHP in the AL mode against the DH mode was approximately 31% for one passenger. In addition, the dual source DHP in the AL mode showed 15.8% higher heating capacity and 5.2% higher COP on average, compared to the air source DHP in the AL mode.

Suggested Citation

  • Ahn, Jae Hwan & Lee, Joo Seong & Baek, Changhyun & Kim, Yongchan, 2016. "Performance improvement of a dehumidifying heat pump using an additional waste heat source in electric vehicles with low occupancy," Energy, Elsevier, vol. 115(P1), pages 67-75.
    • Handle: RePEc:eee:energy:v:115:y:2016:i:p1:p:67-75
    DOI: 10.1016/j.energy.2016.08.104
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    References listed on IDEAS

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    1. Ahn, Jae Hwan & Kang, Hoon & Lee, Ho Seong & Jung, Hae Won & Baek, Changhyun & Kim, Yongchan, 2014. "Heating performance characteristics of a dual source heat pump using air and waste heat in electric vehicles," Applied Energy, Elsevier, vol. 119(C), pages 1-9.
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    Cited by:

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    5. Han, Xinxin & Zou, Huiming & Wu, Jiang & Tian, Changqing & Tang, Mingsheng & Huang, Guangyan, 2020. "Investigation on the heating performance of the heat pump with waste heat recovery for the electric bus," Renewable Energy, Elsevier, vol. 152(C), pages 835-848.
    6. Pang, Liping & Luo, Kun & Yuan, Yanping & Mao, Xiaodong & Fang, Yufeng, 2020. "Thermal performance of helicopter air conditioning system with lube oil source (LOS) heat pump," Energy, Elsevier, vol. 190(C).
    7. Sun, X.Y. & Dai, Y.J. & Ge, T.S. & Zhao, Y. & Wang, R.Z., 2017. "Comparison of performance characteristics of desiccant coated air-water heat exchanger with conventional air-water heat exchanger – Experimental and analytical investigation," Energy, Elsevier, vol. 137(C), pages 399-411.
    8. Jiang, Qinhua & Zhang, Ning & Yueshuai He, Brian & Lee, Changju & Ma, Jiaqi, 2024. "Large-scale public charging demand prediction with a scenario- and activity-based approach," Transportation Research Part A: Policy and Practice, Elsevier, vol. 179(C).

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