Performance characteristics of mobile heat pump for a large passenger electric vehicle |
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| Authors: | Dong-Yeon Lee Chung-Won Cho Jong-Phil Won Youn Cheol Park Moo-Yeon Lee |
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| Affiliation: | 1. School of Mechanical Engineering, Yeungnam University, 214-1, Dae-dong, Gyeongsan-si, Gyeongsangbukdo, 712-749, Republic of Korea;2. Korea Automotive Technology Institute, 74 Yongjung-ri, Pungse-Myun, Dongnam-gu, Chonan-si, 330-012, Republic of Korea;3. School of Mechanical Engineering, Jeju National University, Jeju-si, 690-756, Republic of Korea;4. School of Mechanical Engineering, Dong-A University, 37 Nakdong-Daero 550, Saha-gu, Busan, Republic of Korea |
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| Abstract: | In this study, the performance of a mobile heat pump for an electric bus, which uses the wasted heat of electric devices for a heating and air source for a cooling, was evaluated. Both cooling and heating performances of the mobile heat pump were tested under various experimental conditions, and then optimized by varying the refrigerant charge and the compressor frequency. The cooling capacity at all compressor frequencies was over 23.0 kW, which is sufficient for the cooling loads of an electric bus. The heating COP decreased but the heating capacity increased with the rise of outdoor temperature and the compressor frequency. The heating COP was 2.4 at an outdoor temperature of 10.0 °C. The observed heating and cooling performance characteristics of the mobile heat pump means it could be used for cabin heating and air conditioning of an electric vehicle with a short driving range. |
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