Experimental Research Of Domestic Shower Drain Source Heat Pump Water Heaters

With the improving of economic, the people’s demand of comfortable life isincreasing, and the amount of hot water used by residents is increasing progressively,especially bathing water. As the temperature of shower drain water is high, lots ofheat dischareged with the shower drain, using heat pump to recover the waste heatof shower drain can improve the energy efficiency. In recent years, the research ofusing heat pump recover sewage waste heat is increasing, but the research hasfocused on the large centralized user like community, bathing centers and hotels, theresearch of heat pump system which apply to small individual family and heatexchanger on the wastewater side is rare. Therefore, it is necessary to devise asewage collection equipment and a efficient heat exchanger on the wastewater sidewhich could be applied to domestic shower drain source heat pump water heatersthat combined the emission characteristics of domestic hot water and users’ habits inresidential buliding.A water heater system using shower waste water source heat pump for smallindividual family is put forward, which can utilize the energy of domestic showerdrain water and consume the energy at the same time. Designs a shower waste waterheat extracion device to which the pre-heated water loop is added for improvingsystem performance. In this system, the pump is canceled and uses the pressure ofwater pipe network as power source that reducing energy consumption andimproving energy utilization.This paper completes the design of the components of domestic shower drainsource heat pump water heaters and sets up a system test platform. Experimentaldata has been obtained in different experimental program and verify the operation ofthe test prototype. Various operating characteristics in different experimentalprogram are analyzed and summarized in the form of charts, the effects of someoperating parameters on perforemance of the system operation in differentexperimental program are investigated.This research is one sub-project of study on the key technique anddemonstation of green transformation of existing building in typical climate zones,supported by National Twelfth Five-year Technological Supporting Project fromChina Ministry of Science and Technology(MOST) and coded as2012BAJ06B02.