| With the development of economy and the enhancement of living standard, the demand for hot water by inhabitants living in both city and countryside increases, which contributes to a consuming market of hot water, with a large quantity and extensive scale. Air-source heat pump water heater is becoming popular in the global market because of its high efficiency and flexibility in the view of energy utilization. This paper concentrated on system performance optimizing and researching on the refrigerant flux characters of air-source heat pump water heater for residential requirement.The principle and process of air sourced heat pump water heater (ASHPWH) are introduced in this paper, and a mathematical model is built simultaneously. Some factors in real heat pump cycle are discussed, such as liquid subcooled, gas superheated, heat exchanging, pressure loss and non-condensable gas, according to the heat absorbed, system COP, and compressor power input of the heat pump. Thermaldynamic analysis was done focusing on the air source heat pump water heater. |
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