Predicting entropy generation of a hybrid nanofluid in microchannel heat sink with porous fins integrated with high concentration photovoltaic module using artificial neural networks

•Second law aspects of hybrid nanofluid in a MCHS whit porous fins are examined.•The water based silver/graphene hybrid nanofluid is used as coolant.•Frictional entropy generation augments by boosting the nanoparticle concentration.•By rising the flow rate, thermal entropy generation declines.•Artificial neural network is employed to obtain a model for the entropy generation.