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    초록·키워드

    The main objective of this work is to investigate the performance characteristics of a CO₂ heat pump system for the fuel cell electric vehicle. The heat pump system adopts an electrically driven compressor running with refrigerant CO₂ (R-744) and uses the ambient air as the heat source for the exterior heat exchanger(evaporator). The experimental work has done with the variation of the electric compressor speed and the interior air temperature. The heating capacity of the interior heat exchanger(gas cooler) was measured to be up to 6.8 kW and the interior heat exchanger outlet air temperature was up to 60°C.

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