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Investigation on an improved heat pump AC system with the view of return air utilization and anti-fogging for electric vehicles.pdf
Applied Thermal Engineering 115 (2017) 726–735
Contents lists available at ScienceDirect
Applied Thermal Engineering
journal homepage: /locate/apthermeng
Research Paper
Investigation on an improved heat pump AC system with the view of return air utilization and anti-fogging for electric vehicles
Guiying Zhang a,b,c, Huiming Zou a,b,?, Fei Qin a,b,c, Qingfeng Xue d, Changqing Tian a,b
a Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China b Beijing Key Laboratory of Thermal Science and Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China c University of Chinese Academy of Sciences, Beijing, China d China FAW Group Corporation RD Center, Changchun, China
highlights
An improved EV AC system using return air with continuous anti-fogging was presented. Thermal model of electric vehicle on maximum return-air-using was established. Energy-saving potential of air source heat pump auxiliary PTC was predicted.
article info
Article history: Received 23 August 2016 Revised 26 December 2016 Accepted 31 December 2016 Available online 03 January 2017
Keywords: Heat pump Return air Electric vehicle Air-conditioning
abstract
Utilizing the return air and fresh air properly is a promising approach to meet the demand for anti-foggy and energy-saving at the same time in electric vehicle (EV). In this paper, a concept of applying a continuous anti-fogging air curtain for front windshield glass to realize the maximum-return-air utilization in winter is presented. Accordingly, heating demand model of EV is built up by taking account of the return air ratio (RAR). The research results indicate that the heating demand can be reduced by 46.4–62.1% compared to the all-fresh-air condition when the ambient temperature is à5 °C to à20 °C. And, air source heat pump (ASHP) system performance under different RARs is tested experimentally in à20 °C ambient temperature to predict
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