Study On The Optimum Ratio Of Wind-solar Complementary In Low Temperature Heating

As a multi-source complementary system,the wind solar complementary system has obtained some breakthrough research in recent years.Its research content and theme mainly involve the utilization,collection and mutual conversion of electric en-ergy,and less focus on the complementary heating system.According to the charac-teristics of the wind and solar resources in Zhangbei District of Zhangjiakou,this pa-per designs a suitable wind solar hybrid heating system.Taking the minimum annual cost as the objective function,this paper studies the wind solar ratio of the system in different years,and carries out the TRNSYS simulation study on the design of the wind solar complementary heating system.The main achievements of this paper are as follows:1.Through the analysis and calculation of investment cost and operation and maintenance cost of wind solar hybrid heating system,the heating area is 60m²Taking solar collector area A,wind turbine power Pw and electricity consumption of auxiliary heat source Q_AUX as constraints,the system operation period n is set as 10～20 years,and the genetic algorithm is used to optimize the model.The results show that in different operation periods of the system,when the solar collector When the area is 30.38 m²and the wind turbine power is 0.3 k W,the economy of the system is optimal.With the increase of operation cycle,the annual average initial investment,maintenance cost and heating cost per unit area of the system are reduced year by year,and the economy of the system is getting better and better.2.With the help of TRNSYS platform,the construction and operation simulation of wind solar hybrid heating system model are carried out.The optimized solar col-lector area and wind turbine power are taken as the parameters of collector and wind turbine,and the operation state of the system in the whole heating season is simulated and analyzed.The results show that the heat from solar collector accounts for 85%of the total heat generated by the system,the effective heat from wind turbine accounts for 6%of the total heat generated by the system,and the auxiliary heat source ac-counts for 9%of the total heat generated by the system,and can fully meet the heat demand of the target building in the heating season.