Study the Eminent Temperature Impact on the Performance of the PV Module Based on an Empirical Correlation with Natural Convective Conditions

ghanim thiab hasan, kamil jadu ali, Ahmed Hasan Mohammed


Through some previous studies, it has been shown that the value of the conversion coefficient of solar energy determined by the manufacturer in the standard test conditions (STC) of the photovoltaic (PV) module (25 °C - 1000 W / m2) cannot be achieved in real conditions of exploitation. In this paper, the effect of the ambient temperature on the PV modules for different angles of inclinations and different intensities of the solar radiation on the surface of the PV module is considered by using empirical correlations for natural convection. An analytical model based on the energy balance equilibrium between the PV module and the environment conditions has been used .Also an expression for calculating the electric power of silicon PV modules in a function of the ambient temperature, the intensity of the solar radiation, the incident angle of the solar radiation to the surface of the PV module and the efficiency of the PV modules at STC conditions have been used. By comparing the obtained both results, it can be seen that the largest deviation between the power values obtained by the analytical model and expression is about (5 %). This process can be used for planning solar photovoltaic power plants or calculating the expected electric power in relation to the ambient conditions .The results obtained indicates that in the case of a small number of PV modules corresponding to the required number for an average household, it is more economical to invest additional resources in increasing the PV module's surface area than in case of the PV module with sun tracking system.


Photovoltaic module, temperature, efficiency, inclination angle, correlation

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