Research On Operating Performance And Optimization Of Solar Energy Inter-seasonal Heat Storage Heating System

In view of the current lack of energy and the deterioration of the climate,the depletion of national energy is always a wake-up call to mankind.Facing this situation,experts and scholars from all over the world are committed to promoting and studying renewable energy.The heating mode of solar energy cross season heat storage is a way that can make full use of solar energy and improve the utilization rate of solar energy.However,due to the technical difficulties and the large investment cost in the early stage,this paper uses TRNSYS software to build the heating model of solar energy cross season heat storage,and analyzes the operation performance of the system in Jinan City,Shandong Province,through the optimization of the control scheme to the built The system is optimized.This paper introduces the current situation of the world's energy,points out the trend of renewable resources solar energy utilization,introduces the research direction and content of relevant scholars at this stage,and then points out the research direction of this paper.By analyzing the solar energy resources,climate conditions and soil characteristics of Jinan City,Shandong Province,the feasibility of solar energy cross season heat storage heating system in this area is proved.This paper uses heat storage tank to store heat,plate collector to collect heat,and air source heat pump to assist heating.Taking the 18 storey residential building in Jinan City,Shandong Province as the research object,the simulation studio in TRNSYS simulation software is used to simulate the hourly thermal load of the building,and the thermal load is352 kw,and the thermal index is 29.3w/m2,on the one hand,the load is used as the basis to determine the selection of various components of the system,on the other hand,the hourly heat load will be directly applied to the later simulation model built by TRNSYS.Analyze the experimental conditions,input the parameters of the experimental conditions into the model,simulate the model,analyze the simulation results,analyze the error causes,and verify the accuracy of the system.The simulation and analysis of the operation performance of the research case,and the optimization of the system case in the end.The results show that when the volume of the heat storage tank and the area ratio of the collector are 1800 L / m2 and the area ratio of the collector is 789.75 m2,the maximum temperature of the system's heat storage tank is 93?,and the temperature change of the heat storage tank is stable;the month with the highest heat storage capacity and heat collection efficiency appears in April,and the heat loss of the water tank reaches the maximum in April;for the residential building with 12000 m2 heating area,the system operates for one supply The energy consumption of the heating cycle is 179457.82kw·h,and the cop of the integrated heating season system is 3.03.Based on the control scheme of the system,the optimized analysis shows that when the difference between the outlet temperature of the collector and the bottom temperature of the heat storage tank is 6 ?,the energy consumption of the system is the least,177341.47kw·h,2116.35kw·h is saved,and the cop of the whole heating system in a heating season is 3.07.At the same time,by changing the start time of heat storage,the simulation results in this case Under the model selection,the effect of annual heat storage is the best and the energy consumption is the least.