Research On Simulation And Optimization Of Solar Energy And Ground Source Heat Pump Combined Energy Supply System For Rural Houses In North

In rural areas in northern China,coal is the main energy source for traditional heating methods.As people continue to improve the comfort of their living environment,the demand for heating energy consumption is also increasing.In view of the rich solar and geothermal energy characteristics in northern rural areas,solar energy technology and ground-source heat pump systems are combined for heating.TRNSYS simulation is mainly used to study the following aspects of the combined heating system:DeST building energy consumption simulation software was used to dynamically simulate the thermal environment of the building,and the hourly heat load was obtained throughout the year.The heating index of the building air-conditioning heating was 26.66 W / m2,and the heating period was set from November 15 to January 15 of the following year.During this period,the total building energy consumption was 22770.2k Wh.Provide a basis for determining the design parameters of heating systems.Based on theoretical calculations,7 sets of design parameters are obtained,and the ratio of the volume of the hot water storage tank to the area of the solar collector is defined as VAR.The 7 sets of VAR are 0.46 m,0.236 m,0.158 m,0120m,0.099 m,0.083 m,0.073 m.Use TRNSYS simulation software to build a simulation system and simulate the effective solar heat collection,heat collection efficiency and ground-source heat pump unit heating and power consumption of the seven groups of VARs.The guarantee rate determines the system's best VAR = 0.073 m.Under this parameter,the annual cost value is 14,476 yuan / year,and the solar guarantee rate is above 50%.According to the determined optimal optimization parameters,the combined heating system is calculated and analyzed from the aspects of economic benefits,energy saving and environmental protection benefits.The economical aspects are compared with fuel oil boilers,gas boilers,and solar-electric auxiliary heating heating systems.The results show that:This article uses TRNSYS simulation software to study and analyze the combined heating system of solar energy and ground source heat pump,and optimizes its design parameters,which has reference significance for the selection and design of heating systems in northern rural areas...