Theoretical Study on the Energy Supply System Employing Pvt Roof in Heat Pump

Abstract

This research proposes a novel energy supply system integrating a PVT roof into a heat pump system, capable of providing both electricity and heat. This research introduced the design scheme of energy supply system and the integrated construction form of PVT module and building roof. Analyzing the heat transfer mechanism and establishing a mathematical model demonstrates the system's functionality. Evaluation of the system's capacity and energy consumption characteristics, along with an analysis of its impact on cooling load and heat gains, reveals promising results. The results reveal that the system achieves a heating guarantee rate of 97%, meeting most of the residential heat demand in winter, while 63% of the electricity consumption requires an external grid supply. In summer and transitional seasons, the system not only meets the electricity requirements of the residence and heat pump unit but also feeds excess electricity to the grid. Comparatively, the PVT roof effectively delays and reduces peak roof cooling load and heat gains in summer compared to traditional roofing. These findings offer insights for optimizing energy supply systems and advancing the integration of photovoltaic and thermal technology into building design.

Keywords: Energy supply system, PVT heat pump system, PVT roof, Thermal performance, power performance