Optimizing Analysis Of The Dual-Source Solar Assisted Heat Pump And Hot Water System

In this dissertation, a research has been made on the optimization design of dual-source solar assisted heat pump and hot water system based on the principle and characteristics of solar energy heat utilization system and air source heat pump system.Firstly in this paper, according to the model of solar radiation on the inclined plane and the optimization calculation, we can get the optimum tilt angle of the collector for the maximum collection solar energy in different areas in one year or a quarter of year. On this basis, the paper analyzes the solar collector heat transfer equation and the thermodynamic performance, the establishment of flat-plate solar collector's mathematical model for calculating the effective solar collector heat gain and collector efficiency.This paper analyzes the principles of solar assisted heat pump system, application of the three-way modulating control valve in the system, and the air source evaporator and the water source evaporator are connected in parallel. According to the different temperature at different times, the system automatically switches three-way valve to open and close to realize the system at different ambient temperatures continuous heating and ensure the stability of the system.This paper establishes the energy balance function of dual-source solar assisted heat pump system. Using BIN method the paper calculates required capacity of heat pump and auxiliary heater, energy consumption, load ratio, average COP, HSPF. From the perspective of obtaining maximum HSPF, this paper studies the optimum switching temperature of the system, calculate the required collector area and water capacity of heat storage water tank.Finally, the paper discusses the stability, energy saving, environmental conservation, technology and economy of the dual-source solar assisted heat pump, and further shows the economical efficiency and energy-saving benefits of the system.