| The solar thermal utilization as a low-grade heat source sustainable energy-savingtechnologies,in line with the current direction to ease the energy shortage and environmentalpollution to seek new technologies,in recent years it has been a lot of attention. Use of solarenergy heating hot water is the most common form of solar energy heat utilization,but solarenergy dispersion, intermittent, and periodic etc disadvantage limits its application scope.Theuse of solar-heated hot water is the most common form of solar thermal utilization of solarenergy dispersion,intermittent and periodic shortcomings limit its scope of application. Thisarticle draws on the basic theory of the solar heat pump hot water system,on solar assisted airsource heat pump hot water heat storage system the study.This selection of simple structure,for a wide range of solar heat pump hot water system——direct expansion solar assisted heat pump hot water system (DX-ASHP),Choice ofrefrigerant R22as the working fluid of the DX-ASHP hot water system,take advantage of theSolkan calculate the physical properties and thermodynamic properties of the workingfluid,analyze the DX-ASHP hot water system works and the various components workworking mechanism,on this basis,to build a DX-ASHP water heater experimentaldevice,experimental study of the impact of the operation of the system parameters change、various parameters on the coefficient of performance (COP) and filling capacity on thecoefficient of performance (COP). The experimental results showed that:1. The solar radiation is not the stability of the resulting system the various operatingparameters in a dynamic change,it directly affect the system COP.2. Refrigerant filling capacity has an impact on the compressor power,the powerconsumption of the system and COP,when the filling capacity is1.29kg,heating hot watersystem used in the shortest time,the average COP largest and the system power consumption. |
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