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PV 모듈의 셀 면적 비에 따른 공기식 PVT 컬렉터의 열 및 전기성능 비교·분석 연구
이길선(Lee Kil-Seon),유지숙(Yu Ji-Suk),김진희(Kim Jin-Hee),김준태(Kim Jun-Tae) 한국태양에너지학회 2021 한국태양에너지학회 논문집 Vol.41 No.1
The air-type photovoltaic / thermal (PVT) collector is a solar collector that acquires heat generated from the back of the PV module through the circulation of air behind the collector, while the PV module uses solar energy to produce electrical energy. In this process, electricity is produced through PV modules, and heat energy is produced through a heat collection process using air as the heat medium. According to the PV cell ratio, air-type PVT collectors differ in the collector’s thermal and electrical performance. The higher the PV cell ratio of the PV module, the more is the ratio of PV cells per unit area, thereby increasing the total electricity generation of the collector. However, when the PV cell ratio is lowered, the glass to back sheet (GtoB) transparent type PV module increases the area of the light-permeating part. Therefore, the air heat behind the PV module increases, thereby improving the thermal performance of the collector. In this study, outdoor testing was conducted in accordance with the test conditions of ISO9806:2017 to investigate the thermal and electrical performance of an air-type PVT collector. A comparative experiment was carried out for: (i) Case 1 (PV cell ratio of 0.9) with a perforated baffle, and (ii) Case 2 (PV cell ratio of 0.67) with a lower PV cell ratio to improve thermal performance. Based on the inlet flow rate and the PV cell ratio of air-type PVT collectors, the thermal and electrical efficiencies were analyzed and compared.
타공 베플이 적용된 공기식 PVT 컬렉터의 실험을 통한 열·전기성능 평가 연구
유지숙(Yu Ji-Suk),이길선(Lee Kil-Seon),김진희(Kim Jin-Hee),김준태(Kim Jun-Tae) 한국태양에너지학회 2021 한국태양에너지학회 논문집 Vol.41 No.1
BIPV (Building Integrated Photovoltaic) is a building envelope technology that converts solar energy into electrical energy, but heat is dissipated at the back of the BIPV module during the production of electrical energy. However, PVT collectors are devices that produce electricity on the front of the PV and concurrently use heat generated from the back of the PV module. Therefore, in buildings that require heating loads, the PVT system can use both electrical and thermal energies directly; hence, its solar energy utilization rate is higher than that of the BIPV and solar thermal systems. In this study, a new PVT collector using air as the heating medium was newly designed and fabricated, and the thermal and electrical performances were analyzed through outdoor experiments. A baffle applied to the air layer in the collector was designed earlier to improve the thermal performance through CFD simulation analysis. This study analyzed the thermal and electrical characteristics according to the inlet flow rate, solar radiation intensity, and temperature at the back of the PV module of a new type of air-type PVT collector. Consequently, when the inlet flow rate of the collector increased to 100 ~ 200 ㎥/h, it was confirmed that the thermal efficiency was 22.7 ~ 50% and the electrical efficiency was 15.75 ~ 16.54%.