Study On Energy Saving And Comfort About Radiant Heating And Air Cooled Heat Pump Matched

Experiments prove that energy-saving effect of air-cooled heat pump is veryobvious. Compared with the traditional radiator heating, there is30%of energy-savingoverall. Therefore, air-cooled heat pump radiant heating system is widely used at homeand abroad. The matching problem of air-cooled heat pump and radiant heating systembecome the focus of study in the field.A problem is the matching of power output and heating heat load. In the case offloor radiation heating, compared with three methods of calculating ground effectiveheat release, it is found that the Japanese manual method is more accurate when floorheating heat load is calculated.Another is the matching of power output and water supply temperature. Becausepower output of units is affected by environmental temperature and defrosting; thepaper uses DeST software to simulate floor heating heat load on a single apartment forthe whole year, and the unit is matched. It is analyzed that the power output of unitsimpacts on water temperature changes of the system.Water supply temperature directly impacts the indoor thermal comfort. Under thecondition of meet the indoor thermal comfort, the paper simulates the temperature fieldrespectively on the walls, roof and floor heating. The results show that the comfort offloor radiant heating is better than walls and roof; and the refrigeration on roof is bettercomfort.With the decay of the COP, the system of water supply temperature will graduallyreduce, so it can not meet the indoor thermal comfort. In order to achieve thermalcomfort requirements, it can improve the unit capacity, or set auxiliary heating. It willlead to the increase of energy consumption. So, heat source of radiation heating systemcan choose the CO2air source heat pump. There is not only environmentalprotection,but also water supply temperature can reach to60℃above. When thewater temperature is45℃and60℃, by the simulation and analysis of indoortemperature field, it is found that CO2air-cooled heat pump heating system is morecomfortable and more efficient.