Abstract:

Utilization of air-conditioning condensing heat recovery in daily hot water preparation was propitious to energy conservation.Condensing heat recovery system based on thermal storage of phase change material was designed and analyzed in this paper.Related studies such as thermal storage and heat releasing experiment,comparison between air conditioning system with or without the thermal storage device,relationship between temperature rise and flow rate,making hot water during air-conditioning running were also conducted.It could be proved that sensible heat of condensation could be recovered effectively by the way of installing thermal storage device in this system.Air conditioning system kept in good situation with condensing heat recovery unit.Experiments showed larger flow rate lead to less temperature rise of cold water during the discharging process of thermal storage device.And that several air conditioning units run simultaneously could improve the temperature rise of cold water.