ZEMCH 2019 International Conference Proceedings April.2020 | Page 416
Open voltage
Short current
Collector size
19.05 V
8.61 A
1584 ൈ 1031 ൈ 84.5 mm
3.2. AHU system with BIPVT collectors
38.53 V
9.05 A
1084 ൈ 1031 ൈ 84.35
BIPVT collectors that were installed in the experimental building were connected in the AHU
system. The heated air through the BIPVT collectors pass the outlet and enter in supply air of AHI. It
was controlled with the fan and damper and there are two operation modes as shown in figure 4. When
the heating for space is not required like summer season, the damper between the PVT collector and
AHU blocked, and the heated air is exited outdoor. The exiting the heated air to outdoor can prevent
to overheat of the PV module, also can improve the electrical efficiency of the PV module by decreasing
the temperature of the PV module in summer. In the winter when the heating required, the damper is
opened then the heated air enter into the AHU as supply air. By using the warmed air as supply air of
AHU, it can reduce the energy to heat the cold outdoor air in the AHU system. In order to analyze the
energy saving for the AHU system, the test was conducted in the heating season. For the test the
temperature of the outlet of PVT collector, supply air for the room, outdoor air was measured.
(a) Non‐heating period
(b) Heating period
Figure 4. Operation mode of AHU system (a) Non‐heating season; (b) heating season
4. Results and discussion
For the analysis, the experimental data were collected in the heating period from February to
march. When BIPVT and BIPV system was compared, the heated air of the BIPVT collector was
extracted outdoor in BIPVT system. During the experiment of the AHU system with the BIPVT
collector, the AHU system with the BIPVT collector was run by the heating mode. The air heated by
BIPVT collectors was entered into the OA of the AHU unit instead of the cold outdoor air.
4.1. Performance of BIPVT collecor
The daily electricity yield of BIPVT collector and BIPV is shown in figure 5. When solar radiation
was lower than 600 W/m2 it shows the PV power of BIPV was higher than BIPVT collector. However,
when solar radiation increased more than 600 W/m2, the PV power of PVT was confirmed to increase
than the BIPV. Especially, it was found that when the highest solar radiation in midday (12~2 pm), the
difference of PV power generation between BIPVT and BIPV was generated at the largest amount.
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ZEMCH 2019 International Conference l Seoul, Korea