Volume 61

Performance Evaluation of a Solar Assisted Heat Pump System for Year-Round Climate Control of an Office Building Mahmut Sami Büker, Veli Can Güran, Halil İbrahim Dağ

Abstract

This study presents the design, implementation, and performance evaluation of a solar-assisted heat pump system integrating photovoltaic (PV) and photovoltaic–thermal (PV/T) technologies to meet the thermal and electrical energy demands of an administrative building with an area of 1637 m². The proposed system combines PV and PV/T collectors with an air-source heat pump to provide space heating, cooling, and electricity generation, aiming to improve energy efficiency and reduce carbon emissions.
Stable year-round operation is achieved through seasonal control strategies, including hot water circulation for snow removal on PV/T collectors in winter and active collector cooling when surface temperatures exceed 40 °C in summer. System operation is constantly monitored by a SCADA system. Long-term operational data show that the integrated system increases overall energy efficiency by approximately 66% and reduces CO₂ emissions by about 65% compared to conventional fossil fuel–based systems.
The results confirm that PV and PV/T-assisted heat pump system, supported by smart control strategies, provide an effective solution for increasing renewable energy use in buildings, reducing dependence on energy imports, and supporting the transition toward low-carbon and positive-energy building concepts.

Keywords PV, PV/T, Heat Pump, Energy efficiency