Summary Of Research On Household Ground Source Heat Pump Heating System Based On Photovoltaic Power Generation Waste Heat

With the depletion of energy resources and the rapid deterioration of the ecological environment,the challenges faced by society are becoming more and more serious.Solar energy is a clean renewable energy source,which can be directly converted and utilized,and has the advantages of universality,harmlessness,long-term durability,and large reserves.However,there are some problems such as low energy conversion efficiency in photovoltaic power generation system using solar energy.In this paper,a household ground source heat pump heating system based on residual heat of photovoltaic power generation is proposed to improve solar photovoltaic utilization.And taking the Zhangjiakou area as an example,the operating characteristics of the system were studied in detail.Firstly,the heat transfer model of solar photovoltaic modules was established in combination with the theoretical knowledge of heat transfer.The structure and heat transfer characteristics of the photovoltaic module were introduced,and the temperature and photoelectric conversion efficiency of the typical solar cell module backplane were simulated.The temperature range of the back of the solar panel corresponding to the optimal photoelectric conversion efficiency was determined.Research to improve efficiency by controlling and reducing backsheet temperature.Secondly,this paper proposes a household ground source heat pump heating system based on photovoltaic power generation waste heat,introduces the working principle of the system,and analyzes the case of a rural house in Zhangjiakou area.Combining the climatic conditions and environmental factors of the area,the system Equipment selection.Finally,the system's TRNSYS model was established,and the system was simulated in combination with the actual building.During the non-heating season,under the control of different cooling flow,the cooling of photovoltaic panels,the power generation of photovoltaic panels,and the power consumption of cooling equipment were compared.The annual temperature change of soil temperature and the change of soil temperature after 20 years were simulated.Based on the maximum net power generation of photovoltaic panels,the cooling effect of the system and the cooling system of the heat pump unit,the total power generation and power consumption of the system are analyzed and compared.Finally,it is concluded that when the cooling flow rate is 4700kg/h,the photovoltaic panel has the largest net power generation.