Research on Optimal Configuration of Multi-source Coupled Heat Supply System Based on Phase-Change Heat Storage

Aiming at the shortcomings of solar air source heat pump in the heating process, which is inefficient and limited by geography, this paper proposes a multi-source coupled heating system based on phase-change heat storage device. The system is configured with a solid-liquid phase change thermal storage device based on time-sharing control on the basis of the traditional PVT collector-air source heat pump, and establishes a flexible and variable energy supply system in the park through the addition of a thermal storage system, which realises that the heat in the park can be “shifted to fill in the peaks and valleys”, and further improves the reliability of the park's energy supply and environmental friendliness. At the same time, the simulation model of PVT collector-heat storage-air source heat pump system is constructed based on TRNSYS software, comparing the performance difference between ordinary heat storage tank and phase change heat storage tank. The analysis results show that the performance of the system improves significantly in terms of power generation and heat collection efficiency and energy consumption after using the phase-change water tank as the heat storage tank.