ZEMCH 2019 International Conference Proceedings April.2020 | Page 418
system, it was analyzed that even though solar radiation increased the electrical efficiency was kept
steady without degradation.
Figure 7. Effect of time on electrical efficiency and solar radiation of BIPVT and BIPV system
4.2. AHU system with BIPVT collecor
AHU system connected with BIPVT collectors was tested in the heating period, the graph (a) in
figure 8 shows the temperature of BIPVT collector and BIPVT outlet. The outlet temperature of the
BIPVT outlet is similar to middle temperature of the BIPVT collector. The PV module temperature of
the PVT collector was about 25~40 °C, depending on the change in solar radiation. In addition, the
extraction temperature preheated through the BIPVT collector was 22~38 °C, which was 10~20 °C
higher than the outside temperature In the graph (b) of figure 8, when the temperature of supply air
supplied to the room through the AHU system was about 40 C, the temperature of outlet air from the
BIPVT collector was about 32 °C. When the outlet temperature was 32 °C, the outdoor temperature was
17 °C which is lower 15 °C than the supplied air from BIPVT. In the existing AHU system, the cold
outdoor air (OA) come into the AHU unit then, it was heated to supply the warm air for the room. By
connecting the BIPVT collector with the AHU system, it can be supplied preheated air from the BIPVT
collector. And it was found that the healing energy of the AHU system can be saved by using BIPVT
collector.
(a) (b)
Figure 8. Operation mode of AHU system (a) Non‐heating season; (b) heating season
5. Conclusions
In this study, the air type BIPVT collector was manufactured then installed at the experimental
house, and its electrical performance and temperature characteristics were compared and investigated
with the BIPV system through the experiment. Also, the effect of energy‐saving was analyzed when the
BIPVT was connected with the AHU system.
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ZEMCH 2019 International Conference l Seoul, Korea