| Title |
An Experimental Comparison Study of PVT Water and PVT Air Modules for Heat and Power Co-Generation |
| Authors |
이광섭(Kwang-Seob Lee) ; 앤드류(Andrew Putrayudha S.) ; 강은철(Eun-Chul Kang) ; 이의준(Euy-Joon Lee) |
| DOI |
http://dx.doi.org/10.6110/KJACR.2014.26.12.559 |
| Keywords |
태양광 ; 태양광열 ; 온도효율계수 ; 전력효율 ; 열효율 Photovoltaic ; Photovoltaic-thermal ; Efficiency temperature coefficient ; Power efficiency ; Thermal efficiency |
| Abstract |
The development of photovoltaic-thermal (PVT) technology has been introduced in recent years specifically to increase PV efficiency. One of the characteristics of PV systems is that the electricity generation increases as the solar radiation increases whereas the efficiency decreases because of high surface temperatures. Using a photovoltaic-thermal system, the surface temperature can be decreased by capturing the excess heat and the efficiency can be increased due to these characteristics. In this paper, three cases are introduced : 1) PV_r as the reference case, 2) PVT_a, which uses air as a heat source, and 3) PVT_w, which uses water as a heat source. Experiments were performed, analyzed, and compared to examine the effect of the PVT type on the efficiency of the system. The results showed that ETC(%/℃) efficiency of the PVT cases was increased versus the reference case due to decreasing surface temperature. Total efficiencies, which are electrical efficiency and thermal efficiency, for each PVT are tested and found to be 12.22% for PV_r, 29.50% for PVT_a, and 68.74% for PVT_w. |