الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The photovoltaic panel efficiency is sensitive to the panel temperature and decreases when the temperature of the panel increases. One of the ways for improving the system operation is cooling of the photovoltaic panel. This study is divided into two parts the first part introduces the effect of fixed and tracking PV system simulation with and without cooling. The second part investigates the experimental implementation of the PV modules system with and without cooling for both fixed and tracking mechanical control.
First the numerical study is carried out by using the Comsol Multiphysics (Version 4.2) and Matlab (2010), the validity of the present Comsol model done by comparing the results with Kerzmann and Schaefer [37]. The predicted module output power, electrical efficiency, output temperatures, thermal efficiency and total efficiency for fixed and tracking with or without cooling are calculated by using Comsol [36].
In the second part of the current work, a fixed and one axial Sun-tracking system has been employed to study the effect of solar radiation concentrations on the PV performance. A fixed system stopped in the best position to facing the Sun at noon 12:00 pm. The tracking system used motor to move the PV modules. The movement of a photo-voltaic modules are controlled to follow the Sun„s radiation using a data acquisition card (DAQ) unit, Finally an active cooling system is designed and conducted to cool the tracking module at which an absorber system consists of copper pipe welded with aluminum plate is attached underneath the PV modules to allow water flowing below the module surface, The heat from the PV modules transferred to the copper pipes which have a cooling liquid (water)to reduce the PV modules temperature.