Multi-objective optimization of the effects of superheat degree and blade pitch on the wet steam parameters

•GA optimizes superheat degree & blade pitch for maximum efficiency.•WF, MO, PL, and EC are the objective functions in the turbine blade.•The modified model to keep the inlet mass flow rate fixed is studied.•With the inlet steam superheat degree increasing, the condensation process weakens.•Optimization results in reduced wetness fraction, droplet radius, and pressure loss.