Environmental Engineering Reference
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Figure 5.3.1
Modified PV/T dual systems provided with twoTMS (Arif Hasan and Sumathy, 2010).
during the summer. Also, Tripanagnostopoulos et al. (2001a) carried out a comparison
between different types of air PV/T systems. PV module provided with a float glass on
either sides of a tedlar integrated to the rear end of the PV module and compared its
performance to a pc-Si PV module using transparent tedlar on the front where only
float glass is integrated to the rear end of the PV module. The experimental work
revealed that the latter system has a higher electrical efficiency by reducing the temper-
ature of the PV significantly. They also presented hybrid PV/T systems with dual heat
extraction modes (Tripanagnostopoulos et al., 2001b). Three different design modes
of PV/T systems were tested, with (i) a heat exchanger element was provided on the
rear surface of the PV module, (ii) heat exchanger element provided in the middle of
an air channel, and (iii) heat exchanger element provided on an opposite air channel
surface. Results show that for both air and water circulation, PV with a heat exchanger
on its rear surface produces the best thermal performance of the system.
Joshi et al. (2009) evaluated a hybrid photovoltaic thermal (glass-to-glass) system.
They compared the performance of two types of photovoltaic module, which were
PV module with glass-to-glass and glass-to-tedlar respectively. In the glass-to-glass
case, the insulated base has both a black surface and solar cells to absorb the solar
radiation, and then the heat from both the black surface and solar cell is transferred
to the flowing air underneath the insulated base. In the glass-to-tedlar case, both the
solar cell and the ethylene vinyl acetate absorb the solar radiation, and then transfer
the heat to the flowing air underneath the base of the tedlar for thermal heating. The
results obtained from both PV modules compared for a composite climate show that
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