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The development of eco-friendly cars due to global warming. The main problem is the relatively short when compared to the existing mileage per charge of the electric vehicle is a problem. In this situation, because the electrical energy must be spent for heating electric vehicles reduced mileage per charge. Heating performance is studied for air heat source heat pump system. In this study, experiment to analyze heating performance characteristics with air heat source have been with various operating conditions, which are likely to match the air heat source Heat pump system operating conditions under cold ambient conditions, such as variation of compressor speed and interior air temperature. Ambient temperature down from 5℃ to –10℃ occurs reduction of heating capacity of inner condenser due to reduction of refrigerant flow rate in accordance with reduction of 45% density of refrigerant. Increasing compressor speed from 2000 RPM to 3,500 RPM occurs increasing of heating capacity of inner condenser. But COP of heat pump system is reduced 26% due to additional compressor power. It seems a good way to study for a plan to try to increase inner condenser air flow rate, inner heat exchanger area.

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UCI(KEPA) : I410-ECN-0101-2018-505-001063075