Studying On Control Strategy Optimization Of Solar Heat Pump Composite Hot Water System

In the current environment where fossil energy has been exhausted,solar energy,as a kind of clean and renewab le energy,has great development potential and economic value.Solar hot water system develops from appear till now,already formed a more perfect system,but the malpractice of solar water heater also appears gradually,the instability of solar radiation intensity and uncontrollable,bring about solar water heater to cannot satisfy hot water requirement sometimes.Then appeared the solar energy auxiliary heating system,with electric heating and air pump auxiliary heating.The coordination between the solar hot water and the air pump has been the focus of research for many years.Due to the unstable and uncontrollable characteristics of solar energy,the opening time of the heat pump is unreasonable,resulting in a waste of resources.Therefore,this paper focuses on the research on the heating control strategy of the composite hot water system.First,in view of the solar radiation intensity of uncontrolled hot spots,based on the wavelet neural network and BP neural network hybrid neural network to predict the radiation intensity of the solar surface,using the correlation analysis to determine the number of neuron network input and output layer of the sun by radiation sequence three layer wavelet decomposition,the decomposed component respectively as network input,the predictive value of each component of the stacking line by the sun radiation intensity.Secondly,the simulation model under the conventional control strategy was established for simulation to obtain the annual average solar energy collection,heat collection efficiency,COP and other performance parameters.Finally,according to the conventional control strategy under the collection efficiency,the COP data collection efficiency of the system to simulate expression and COP,and make use of solar radiation,solar radiation,the actual and estimated values,collection efficiency and the COP of heat pump,open the time delay and correction,establishing simulation model of energy saving control strategy,the simulation results show that than conventional control strategies under the annual energy consumption decreased by 10%,and the performance parameters are up slightly.