Application of air-source heat pump heating systems to rural residences in Tianjin

In order to study the change of residents’ thermal comfort demand when air-source heat pump heating instead of coal-fired heating and the heating effect of different heating terminals in rural areas of Tianjin, conducts a thermal comfort survey in a rural area of Tianjin, and tests the on-site performance of radiators/fan coils combined with an air-source heat pump. To compare the heating effect of two heating terminals, establishes an energy consumption model by the simulation software. The survey results show that 90% residents in rural areas of Tianjin can accept the operating temperature range of 16.4-19.2 ℃ during winter heating. The measured results show that the indoor air temperature of the fan-coil users is higher than that of the radiator users, and the average daily heating power consumption per unit area is almost the same as that of radiator users. The energy consumption simulation results also show that on the premise of indoor comfort，the required supply and return water temperature of the fan-coil heating system is lower than that of the radiator heating system, and the heating power consumption is less.