이중 채널 및 반원형 난류 촉진체를 가진 공기식 PVT의 공기 유량에 따른 성능 평가

• Published in: 한국태양에너지학회 논문집 Vol. 44; no. 6; pp. 65 - 77
• Main Authors: 안병화(An Byeong-hwa), 김성빈(Kim Seong-bhin), 문광암(Moon Kwang-am), 최광환(Choi Kwang-hwan)
• Format: Journal Article
• Language: Korean
• Published: 한국태양에너지학회 01.12.2024
• Subjects: 기타공학; 태양광열 집열기(Photovoltaic thermal collector); 공기식 집열기(Air-type collector); 이중 채널(Dual channels); 실험(Experiment); 난류 촉진체(Turbulence promoter)
• ISSN: 1598-6411; 2508-3562

A photovoltaic thermal collector (PVT) is a system that regulates the temperature of photovoltaic (PV) module cells by means of a certain fluid flowing underneath them, thereby preventing their electricity efficiency from decreasing. Through this process, the fluid abducting heat from the PV module cells can also produce useful thermal energy. However, air-type PVTs have lower thermal efficiency than those of other types owing to the low thermal conductivity of air; hence, to improve their performance, various methods, such as attaching turbulence promoters or adding air channels, have been proposed. The system proposed in this study was evaluated by applying three different mass flow conditions, i.e., 0.0455, 0.0899, and 0.1189 kg/s, under actual weather conditions. Results showed that both the thermal and electrical efficiencies improved with increasing airflow rate. The highest average overall efficiency, i.e., 84.8% at an airflow rate of 0.1189 kg/s, was achieved by considering the thermal and electricity efficiencies. As the airflow rate increased, the average overall efficiency improved by 44.5%, from a minimum of 58.7% to a maximum of 84.8%. Overall, the PVT system with the turbulence promoter and dual-channel structure improves the thermal and electricity efficiencies as the airflow increases. KCI Citation Count: 0