Abstract

This study evaluates the feasibility of a radiant floor heating system integrated with a photovoltaic-thermal (PVT) system in multi-family housing. The analysis compares the temperature of hot water in the thermal storage tank with the required supply water temperatures (45°C and 60°C), which were selected based on the typical heating demand and the expected output range of the PVT system. When the PVT output was insufficient to meet the supply temperature, a boiler was used as an auxiliary heat source. Simulation results showed that during certain periods, the storage tank temperature exceeded 45°C, indicating that the PVT system alone could satisfy the heating demand under the 45°C condition. In terms of energy performance, the 45°C case resulted in approximately a 15% reduction in energy consumption, whereas the 60°C case showed a reduction of about 1.5%. These findings suggest that PVT systems, which typically produce low-temperature water, are more feasible for low-temperature heating applications, and their feasibility improves as the required supply temperature decreases.