Preliminary off-design performance evaluation of a P2G system coupled with renewables

In this study, the off-design performances of a Power-to-Gas process are predicted by means of a developed calculation model. The numerical code has been developed in commercial tool environments in order to carry out a preliminary analysis of the Power-to-Gas system. In addition, with the aim to predict co-electrolysis behaviour under several conditions, a specific calculation model has been integrated in the whole system model. Then, starting from a real wind production profile, two configurations (pressurized and at ambient pressure) of the Power-to-Gas system have been analysed, evaluating the weekly operating time of the integrated Power-to-gas/wind systems. The comparison has been made on the basis of the evaluation of the instantaneous and mean values of the considered performance parameters. The system at ambient pressure shows better performance from the point of view of the efficiencies, while the pressurized system presents a higher methane production.