실험을 통한 공기식 태양광·열 복합 이용 시스템의 열적 성능평가

The integration of PV modules into building envelope can cause the increase of module temperature that could decrease the power generation of PV system reduction of PV system's electrical power generation. Hot air can be extracted from the space between PV modules and building envelope, and used for heating in buildings. The extraction of hot air from the space will enhance the performance of BIPV systems. The solar collector utilizing these two aspects is called PV/T(photovoltaic/thermal) solar collector. This research is about the development of high efficient air-type PVT collector and solar roof system to apply into buildings. The experimental performance of PVT roof collector units shows that PVT models with radiant fins attached into the back side of PV modules with the average thermal efficiency of about 44%. A test cell experiment was performed with the PVT roof installed: It found that the hot air supply from the PVT air collector contributed to increase the heating efficiency. The experimental results shows that the roof air heating system outperformed over electrical heating system: for the design heating temperature of 25℃ the solar air heating system could save heating energy of about 2000kJ compared to the latter.