Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers
Online ISSN : 2185-789X
Print ISSN : 1344-4905
ISSN-L : 1344-4905

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Study of Power-saving Effect of EV Heat Pump System Study of Power-saving Effect of EV Heat Pump System
Isao TSUNODAYu SASAKI
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JOURNAL FREE ACCESS Advance online publication

Article ID: 21-16_OA

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Abstract

In this study, we demonstrated the superiority of a heat pump system in heating an electric vehicle over an electric heater supported with other energy-saving measures; an EV heated with a heat pump system consumed less power and enabled better mileage than one heated with an electric heater. We developed a heat pump system which had enough heating efficiency for this experiment, installed it in an EV and measured the heating capacity and the energy consumption. As for an electric heater, we calculated its power consumption based on the measured figures of the EV with the heat pump system, setting the conditions of no ventilation and low temperature respectively as energy-saving measures. We compared the following four figures: the power consumption of heating with an electric heater, heating with an electric heater plus no ventilation, heating with an electric heater plus low temperature, and heating with a heat pump system. The comparison showed that a heat pump system consumes the least energy.

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