Estimation of monthly global solar irradiation using the Hargreaves–Samani model and an artificial neural network for the state of Alagoas in northeastern Brazil

The monthly global solar irradiation (H null null null null null null null null null null null null null null null null null null null null null null null g) was estimated using the Hargreaves–Samani model (HS) with three different approaches for determining the k null null null null null null null null null null null null null null null null null null null null null null null r coefficient and using an artificial neural network (ANN). The...