Long-term PV system performances evaluation by only the main weather parameters data uses. Case of study: Desert and arid climate

The Main objective of this work consist to evaluate the long-term performances of a photovoltaic systems according to the φ-f-chart concept in where only monthly mean values of the main weather parameters are used. Then, based on different equation representing the retained method and those leading reconstituting the monthly mean daily and hourly solar radiation data, a MATLAB program is developed and theoretical investigation of its accuracy was made by comparing the long-term performances of a proposed PV system evaluated by the developed MATLAB program to those presented in literature. Thus, from the obtained results it is observed that the developed program calculates the photovoltaic system performances with a good accuracy and can used as tool for such study of any climate. As application, the developed program was used to evaluate the long performances of a PV system used to cover an electrical load relative to 10 individual houses situated in remote site of Ghardaia region. Ghardaia is situated in the north of Algerian´s Sahara and characterized by a desert and arid climate. among the obtained results, the PV array and the storage size effect on the PV system performances has been lighted, a PV solar system dimensions for a total load covertures is proposed and that leading optimizing the PV array is presented for a partial electrical load covertures is presented also.