The Impact of Heat Pump Water Heaters on Whole-House Energy Consumption 热泵热水器对全屋能耗的影响.pdfVIP

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The Impact of Heat Pump Water Heaters on Whole-House Energy Consumption 热泵热水器对全屋能耗的影响.pdf

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RESEARCH HIGHLIGHT December 2014 Technical Series 14-104 The Impact of Heat Pump Water Heaters on Whole-House Energy Consumption INTRODUCTION of air by the heat pump water heater may contribute to the Heat pump water heaters are one of the most energy- overall cooling of the house—and offset air-conditioning efficient water heating options currently available in the system operation. Canadian market. Heat pump water heaters operate by RESEARCH PROGRAM using electricity to circulate refrigerant in a loop to move heat from the surrounding air into the tank’s water. Since a The evaluation of the heat pump water heaters was carried heat pump water heater (HPWH) can deliver more heating out at the Canadian Centre for Housing Technology energy to the water than it consumes, the water heating (CCHT) in Ottawa, Canada. The unique nature of the efficiency, or coefficient of performance (COP) exceeds that CCHT twin house facility allows not only the examination of conventional storage hot water tanks. However, as of energy savings but also provides a complete picture of HPWHs draw energy from the indoor air, during the winter house performance. months, they add to the space heating load and in the summer months, reduce the air-conditioning loads. METHODOLOGY The purpose of this set of experiments was to examine the Two different heat pump water heater systems were installed whole-house impact of operating a heat pump water heater