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Investigation on the heating performance of the heat pump with waste heat recovery for the electric bus

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  • Han, Xinxin
  • Zou, Huiming
  • Wu, Jiang
  • Tian, Changqing
  • Tang, Mingsheng
  • Huang, Guangyan

Abstract

Efficient heating system is critical for electric vehicles to extend the driving range. In this paper, an air source heat pump system with waste heat recovery (WHR) for the electric bus was proposed to improve the heating performance. According to the experimental results of the prototype, it’s found that the pressure drop of waste heat exchanger (WHX) has great effects on the heating performance and the heat exchanger is required to be optimized. The simulation model of this series system was developed and validated to study the heating performance of the series waste heat recovery system with low pressure drop WHX. The simulation results showed that heat recovery can improve the heating performance at the ambient temperature of −5 °C. Compared with the vapor injection heat pump without WHR, the heating capacity and COP of the heat pump at 2 kW waste heat were increased by 1.61% and 1.38%, respectively. The improvements of heating capacity and COP at 6 kW waste heat were 5.12% and 2.56%, respectively. As the ambient temperature is lower than 0 °C, the heating performance of heat pump system with 2 kW waste heat is better than that of system without WHR. However, as the ambient temperature rises, the heating performance of heat pump with WHR becomes worse.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:152:y:2020:i:c:p:835-848
    DOI: 10.1016/j.renene.2020.01.075
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    References listed on IDEAS

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    6. Tong-Bou Chang & Jer-Jia Sheu & Jhong-Wei Huang, 2020. "High-Efficiency HVAC System with Defog/Dehumidification Function for Electric Vehicles," Energies, MDPI, vol. 14(1), pages 1-12, December.
    7. Najmi, Aezid-Ul-Hassan & Wahab, Abdul & Prakash, Rohith & Schopen, Oliver & Esch, Thomas & Shabani, Bahman, 2025. "Thermal management of fuel cell-battery electric vehicles: Challenges and solutions," Applied Energy, Elsevier, vol. 387(C).
    8. Yulong Song & Hongsheng Xie & Mengying Yang & Xiangyu Wei & Feng Cao & Xiang Yin, 2023. "A Comprehensive Assessment of the Refrigerant Charging Amount on the Global Performance of a Transcritical CO 2 -Based Bus Air Conditioning and Heat Pump System," Energies, MDPI, vol. 16(6), pages 1-21, March.
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