A Compact and Fast Temperature-Response Heat Pump Water Heater
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A compact and fast temperature-response heat pump water heater was designed using multiple tanks and a sequential control device. The supply tank was heated as a priority by a freon-line switching device to increase the temperature recovery speed. A dual-tank prototype with 100-liter capacity was built and tested. The experimental results show that the time for temperature recovery of the supply tank from 42°C to 54°C reaches 10–20 minutes and COP reaches 2.0–3.0 during various seasons. The prototype tests show that an energy saving around 50%–70% as compared to the electrical water heater can be obtained. The hot water discharge efficiency of the heat pump is 0.912.
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2019 ◽
Vol 198
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pp. 111836
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2015 ◽
Vol 797
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pp. 185-191
2010 ◽
Vol 156-157
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pp. 1161-1164
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