Research On Performance Of Combined Heating System Of Solar Energy And Electric Boiler

Increasing scarcity of energy resources and the gradual deterioration of ecological environment has become a serious challenge of human society.In this case,the search and use of clean energy has become a new trend,this paper presents a solar heating system driven by wind power.In addition,this paper has taken Zhangjiakou as an example to study the operating characteristics of the system in detail.Firstly,a thermodynamic model of flat-plate solar collector based on the thermodynamic theory has been performed.The various influence factors(environmental temperature,solar radiation intensity,installation angle,inlet temperature and inlet flow)has been simulated using MATLAB programming software to identify the most appropriate installation and operation mode in Zhangjiakou region.Secondly,this paper introduces the system principle,and a mathematical model for cost-objective optimization design of the heating system has been proposed.In this model,the economy is taken as optimization goals.The matching of solar heat and wind power and the optimal design parameters of each component have been analyzed by use of the model.This will help designers in the preliminary optimization of the heating system.Finally,six operation modes and corresponding principles of the heating system have been introduced based on the character of the fluctuations both of heat load and of meteorological parameters.Dynamic mathematical simulation models for this system has been proposed and the control strategies of the system among six operation modes have been generated.And then,the specific expressions of the model for water tank have been inferred for different operation conditions.Based on the target optimization results,the whole system simulation model and the system control strategy,this paper has taken a 10000m2 office building as an example to study the dynamic performance of wind power driven solar heating system in Zhangjiakou heating season.