Simulation Analysis Of Solar Heating With Thermal Seasonal Storage System In Zhongyuan Region

Energy is a necessity in our life.Accompany with the energy crisis and pollution,came the renewable energy.Many countries are working hard to promote the application of renewable energy.Solar energy storage system is a novel system,which can effectively improve the utilization of solar energy.Regrettably,solar energy storage technology is not extensive application in Zhongyuan region.So,a model of solar energy heating with seasonal storage system is established,and the application performance in Zhongyuan region is analyzed in this paper.First,the theoretical knowledge of solar energy and the commonly used solar energy storage system is introduced in this paper.And the hot-water storage system is chosen.Taking a 200m2 rural residence in Zhengzhou area as research objects,and the hourly heat load of the building is calculated by De ST software.Based on this,the components were selected and designed preliminarily.Then,the simulation model of the solar heating with thermal seasonal storage system is established by using TRNSYS software,and the accuracy of the model is ensured by the experimental data that have been mentioned in other reference.The influence of solar collector area,volume and height-to-diameter ratio of the pool in the solar energy heating with seasonal storage system are analyzed by the validated model.Finally,this research obtained the following conclusions,the heat storage capacity of the system increases with the height-to-diameter ratio increasing,and has achieved the maximum value during 1.6~1.8.The area of collector issuitable for 35~40m2,and the corresponding pool volume is 50~60m3.In this condition,the heat storage is 36~39GJ,the solar fraction is 63% to 72% under the meteorological conditions in Zhengzhou city.The system saves a total of 18362 yuan in the life period,and the payback period is 9 years.Finally,based on the performance analysis of the system in Zhongyuan region,the system performance in Harbin,Changchun,Nanjing and Fuzhou is analyzed.And the cities are selected according to the district of “ thermal design specification of civil building”.The solar fraction of these four regions is 49%,51%,77% and55% respectively.It lays a theoretical foundation for the popularization and application of this solar energy heating with seasonal storage system in China.