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| Theoretical Analysis and Experimental Performance of a Hybrid Inverted Trickle Photovoltaic / Thermal (Pv/T) Solar System |
Rebhi A.Al-Mashaleh, Ali A.Badran
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Abstract:
A hybrid photovoltaic (PV/ T) solar collector was re-built, modified and tested in order to study its performance in the water heating mode where as the other mode was originally used for water desalination. The device consists of a PV module that acts as an absorber plate whose backside is covered with a jute layer. This is to facilitate the spreading of water that flows down this plate by gravity. The losses from the backside of the PV Module are used for domestic hot water heating.The system depends on the idea of the ??inverted trickle where a thin layer of water flows down the bottom of the absorber plate, and water is kept attached to it by surface tension.
The system was tested essentially using the ASHRAE 93-2003 standard for the determination of thermal performance. In addition, a simulation program was developed to predict the theoretical performance of the device using matlab program. It was found that a 28% increase in the efficiency of this system compared witha locally-made flat plate collectorwas obtained. The collector time constant was found to be 9 minutes which is less than that of the conventional one due to the low thermal mass. The incidence angle modifier for PV/ T was also relatively lower than the conventional one. The PV produced electricity at about 182 Watts in the presence of glass where the nominal capacity of the PV module is 250 watt.The maximum overall capacity of the PV/ T system was 82%.
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