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Performance characteristics of a dual-evaporator heat pump system for effective dehumidifying and heating of a cabin in electric vehicles

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  • Ahn, Jae Hwan
  • Kang, Hoon
  • Lee, Ho Seong
  • Kim, Yongchan

Abstract

In electric vehicles, air-conditioning (AC) units and electric heaters have been used for dehumidifying and heating the cabin. However, the air heating process in the electric heater causes higher power consumption due to a lower air temperature entering the electric heater from the sensible cooling in the humidifying process. In this study, a heat pump (HP) and a dual-evaporator heat pump (DHP) combined with a heater are proposed as effective dehumidifying and heating units using waste heat recovery from the dehumidifying process. The performances of the AC, HP, and DHP systems were measured and compared by varying the indoor air wet bulb temperature and compressor speed ratio. Generally, the HP and DHP systems showed superior performance to the conventional AC system in the dehumidifying and heating operation. At the indoor air wet bulb temperature of 13°C, the DHP system showed 53% and 62% higher specific moisture extraction rate and COP, respectively, than the HP system.

Suggested Citation

  • Ahn, Jae Hwan & Kang, Hoon & Lee, Ho Seong & Kim, Yongchan, 2015. "Performance characteristics of a dual-evaporator heat pump system for effective dehumidifying and heating of a cabin in electric vehicles," Applied Energy, Elsevier, vol. 146(C), pages 29-37.
    • Handle: RePEc:eee:appene:v:146:y:2015:i:c:p:29-37
    DOI: 10.1016/j.apenergy.2015.01.124
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    References listed on IDEAS

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    Cited by:

    1. Jung, Jongho & Jeon, Yongseok & Cho, Wonhee & Kim, Yongchan, 2020. "Effects of injection-port angle and internal heat exchanger length in vapor injection heat pumps for electric vehicles," Energy, Elsevier, vol. 193(C).
    2. Weckerle, C. & Nasri, M. & Hegner, R. & Linder, M. & Bürger, I., 2019. "A metal hydride air-conditioning system for fuel cell vehicles – Performance investigations," Applied Energy, Elsevier, vol. 256(C).
    3. Qin, Fei & Zhang, Guiying & Xue, Qingfeng & Zou, Huiming & Tian, Changqing, 2017. "Experimental investigation and theoretical analysis of heat pump systems with two different injection portholes compressors for electric vehicles," Applied Energy, Elsevier, vol. 185(P2), pages 2085-2093.
    4. 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.
    5. Yoon Hyuk Shin & Seungkyu Sim & Sung Chul Kim, 2015. "Performance Characteristics of a Modularized and Integrated PTC Heating System for an Electric Vehicle," Energies, MDPI, vol. 9(1), pages 1-11, December.
    6. Srivastava, Raj Shekhar & Kumar, Anuruddh & Thakur, Harishchandra & Vaish, Rahul, 2022. "Solar assisted thermoelectric cooling/heating system for vehicle cabin during parking: A numerical study," Renewable Energy, Elsevier, vol. 181(C), pages 384-403.
    7. Zhang, Zhenying & Wang, Jiayu & Feng, Xu & Chang, Li & Chen, Yanhua & Wang, Xingguo, 2018. "The solutions to electric vehicle air conditioning systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 91(C), pages 443-463.
    8. Yoon Hyuk Shin & Seung Ku Ahn & Sung Chul Kim, 2016. "Performance Characteristics of PTC Elements for an Electric Vehicle Heating System," Energies, MDPI, vol. 9(10), pages 1-9, October.
    9. Qinghong Peng & Qungui Du, 2016. "Progress in Heat Pump Air Conditioning Systems for Electric Vehicles—A Review," Energies, MDPI, vol. 9(4), pages 1-17, March.
    10. Cai, Jingyong & Ji, Jie & Wang, Yunyun & Huang, Wenzhu, 2017. "Operation characteristics of a novel dual source multi-functional heat pump system under various working modes," Applied Energy, Elsevier, vol. 194(C), pages 236-246.

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    More about this item

    Keywords

    Dehumidification; Heating; Heat pump; Electric vehicle; R134a;
    All these keywords.

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