寒冷地区空气源热泵制热性能试验研究OA

To optimize the operation strategy of the air-source heat pump heating system,a pilot experimental platform is established.Four different brands of heat pump units are combined and used in parallel.The influence of parameters such as outdoor temperature and humidity,supply and return water temperatures,and the energy efficiency coefficient(COP)of the units on the heating performance of the units is tested and analyzed.Three typical heating methods are selected for economic analysis.The results show that an increase in environmental temperature is beneficial to improving the heat exchange efficiency on the evaporator side,a decrease in relative humidity is conducive to slowing down the frosting speed of the evaporator fins,thereby facilitating the maintenance of the heat exchange efficiency of the evaporator,and the frosting speed of the evaporator fins has a significant impact on the heating performance of the unit.The closer the actual supply water temperature is to the set temperature and the more stable the temperature change is,the better the heating performance of the unit.A higher COP value of the unit and a more stable change in COP value are beneficial to improving the heating performance and economic efficiency of the unit.The energy cost of air-source heat pumps is moderate,but its standard coal consumption and CO2 emissions are the lowest.Compared with coal-fired boilers,it can save 964.100 kg of standard coal and reduce CO2 emissions by 2 506.700 kg.Compared with gas-fired boilers,it can save 772.600 kg of standard coal and reduce CO2 emissions by 2 008.800 kg.