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The Saharan medium by its arid nature and the availability of solar immense in our country, 7.8 kWh/m 2 /day can return the application of the water pumping via photovoltaic (PV) pumping system. However, due to their relatively high cost, the sizing of these systems implies the use of an accurate tool. In this paper, a new practical formulation is proposed, in order to predict the daily pumped water quantity (Qd) for a given daily array energy output (Epv) profile and any total manometric head (H). The model based on the linear interpolation/extrapolation, called: translation of the Epv-Qd characteristics of pumps. This technique has been developed based on experimental study. This makes practical translation procedure much easier; only four pv-Qd characteristics measured at any Epv and H can be used as the reference Epv-Qd characteristics. The calculated the Qd over a wide range of Epv and H well agree with experimental results of PV pumping system. These results indicate that the translation of the Epv-Qd characteristics based on this method is effective for estimating the performance of the PV pumping system under various climatic conditions.

A Simplified but Accurate Prevision Method for A Stand -Alone Photovoltaic Pumping System using Linear Interpolation/Extrapolation