Performance optimization of solar heating system based on concentrated photovoltaic solar thermal
Taking an office building in Beijing as the heating object,a clean heating system coupled by a concentrating photovoltaic solar thermal unit,a photovoltaic unit and an air source heat pump(CPVT-PV-ASHP)is proposed.Based on the Trnsys and Grasshopper platforms,the dynamic simulation model and optimization model of the system were constructed,and the area of CPVT photovoltaic panels was used as the decision variable,and the over-volume calculation method(HypE)was used to solve the problem to explore the balance between energy saving,economy and improved heat pump performance.The results show that the optimal solution is obtained when the area of photovoltaic panels in cold CPVT and water-cooled CPVT is 10.9 m2 and 2.3 m2,respectively.At this time,the primary energy consumption of the system is-1 016.1 kg of standard coal,the average COP of the heat pump is 3.72,and the payback period is 2.95 years.Compared with other systems,the CPVT-PV-ASHP system has significant advantages in saving energy consumption and improving the performance of heat pumps.
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