ZEMCH 2019 International Conference Proceedings April.2020 | Page 392
Figure 7. Yearly variations of electrical efficiency of PV/T system with glass to glass and glass to tedlar
cases.
Figure 8. Yearly variations of total thermal efficiency of PV/T system with glass to glass and glass to
tedlar cases.
Considering cumulative weather conditions, the yearly (breakdown into months) variations of
overall exergy efficiency for both cases are presented in Figure 9. The yearly average exergy efficiency
for glass to tedlar and glass to glass cases are 13.82% and 14.23%, respectively. Since the electrical output
from both PV/T configurations is in the form of exergy energy, therefore, the electrical part is more
related to it than the thermal part. Due to this reason, the overall exergy efficiency variation pattern is
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