Household Application Of Air Source Heat Pump For Floor Heating In Winter

According to the selection of winter heating mode in summer warm winter cold area in our country,a kind of winter heating method with air as heat source and floor buried pipe is put forward,and 93 days of field test are carried out.The results show that outdoor the range of the heat capacity of the heat pump unit is 3.82 ~ 10.06 kW,the average value is 6.21 kW.The heat pump compressor suction / exhaust pressure range is 0.4 ~ 0.78 MPa / 2.09 ~ 2.54 MPa,the average value of 0.55 / 2.28 MPa,compression ratio is small;EER range of 2.32 to 4.71,the average is 3.46,higher energy efficiency.At the same time,the temperature of 0.1,1,1.5,2m indoor was measured,the average value is 20.48,19.26,18.75,18.01?,showing a relatively stable temperature field of warm in low and cool in high.The results show that the average daily temperature difference between the two days is 17.21 ?,the warmest daytime heat capacity and the EER are 41.9% and 159% of the coldest day,respectively.The indoor temperature is relatively stable,indicating that the heat pump system has good adaptability and comfort.At the same time,the economic and environmental friendliness of air-source heat pump floor radiant heating,gas boiler heating,regional coal-fired boiler floor radiant heating were compared,the results show that: air source heat pump floor radiant heating the lowest annual operating costs,gas boiler heating and regional coal-fired boiler floor radiant heating of 40.7% and 69.2%.Taking into account the current multi-site air-source heat pump to support vigorously,the annual cost can be as low as ? 21.69/m2,the lowest of the three heating methods.And its heat source for renewable energy,the process of running only a small amount of energy consumption,environmental friendly are better.The simulation results show that during the daytime operation,the average temperature of the room from the floor height of 1.5m at night is 16.73 ?,and the average heating value is the average value of the heating capacity of the heat pump unit.The average heat capacityand EER are 8.21 kW and 3.82,and the mean value of EER increased by 0.36,compared with the indoor temperature drop of about 3? in the all-weather mode.In this mode,the performance of the heat pump unit is excellent,but at the time of environment temperature is lowoutdoors,thermal environment is pooron night indoors.The heat pump runs on the time of price in low daytime,the average heating value is 8.01 kW and the EER is 3.05.In this mode,the operation period of the heat pump unit mainly concentrates on the low outdoor temperature.Heat pump unit performance coef-ficient decreased,but the total electricity during this mode compared with all-weather operation mode to reduce the ? 840.6,reduce the proportion of 52%,the operation of a strong economy-save.