One of the most important difficulties in using
photovoltaic systems is the low energy conversion
efficiency of PV cells and, furthermore, this efficiency
decreases further during the operational period by
increasing the cells temperature above a certain limit.
To increase the efficiency of PV systems during
operation period cooling systems are employed in the
experimental work, three cooling systems: film water
cooling, direct contact back water cooling and
combining film - back cooling are presented and
analyzed. The Infrared Camera used to obtain the
module surface temperatures distribution.
Experimental measurements for the three cooling
experiments indicate that the temperature of the cooling
photovoltaic module is lower up to 16, 18, 25 ºc for film
cooling module, back cooling module and combined film
– back cooling module, respectively compared to noncooling
module. Reducing the module surface
temperature causes an increase in module output power
and module efficiency. The results show that the daily
output power of the PV cooling module increased up to
22 %, 29.8% and 35% for film cooling, back cooling
and combined film – back cooling module, respectively
compared to non-cooling module. |
