Performance Simulation Study of PV/T - Heat Pump - Valley Electric Heat Storage Heating System

To realize clean heating of buildings and peak and valley reduction of the power grid, this paper constructs a building heating system (PV/T-HP-VEHSH) with PV/T-heat pump combined with valley heat storage and proposes a system operation regulation and control strategy. Taking an office building as the research object, based on the time-by-time heat load and equipment start-stop control strategy, the simulation model of PV/T-HP-VEHSH is constructed by using TRNSYS software, and compared with PV combined air source heat pump heating system (PV-AHPH) and PV/T-heat pump building heating system without considering valley power heat storage (PV/T-HPH) to study the PV/T-HP-VEHSH heating performance, combined efficiency and economy of photovoltaic solar thermal. The results show that the monthly average COP of PV/T-HP-VEHSH is 2.8–3.2 during the heating season, the PV/T plate temperature is in the temperature range of 25–30 °C with high photoelectric conversion efficiency 84% of the time, and the PV/T photoelectric-photothermal integrated efficiency is more than 55%; after using valley electricity to store heat, compared with PV/T-HPH, the heating operation of PV/T-HP-VEHSH The cost can be reduced by 3.3 Yuan/m2 compared with PV/T-HPH.