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Solar Water Heater
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Heat Pump Water Heater
 
Heat Pump Water Heater

Working principle:

Air-source Water Heater is also known as Heat-pump Water Heater. The working element is as following: The heat in the low-temperature (low quality) heat source can be transferred to the high-temperature heat source by consuming a certain quantity of high quality energy. Then the total quantity of heat available includes the heat transforming from the high quality energy and the heat absorbed from the low-temperature heat source. The heat pump is not a transforming device of heat; it is a transferring device of heat, instead. So, the working efficiency is governed by the limit of transferring ratio (100% at most). The heat pump use the heat-absorbing medium (cold medium) to collect heat from the air or the environment, heat up the cold water through the heat-exchanger and give off cold air at the same time.