Numerical prediction of off-design performance for a Power-to-Gas system coupled with renewables. (15th April 2020)

• Record Type: Journal Article
• Authors: Ancona, M.A.; Bianchi, M.; Branchini, L.; Catena, F.; De Pascale, A.; Melino, F.; Peretto, A.
• Is Part Of: Energy conversion and management. Volume 210(2020)
• Publication Date: 2020-04-15
• Subjects: Power-to-Gas -- Co-electrolysis -- Methanation -- Storage system -- Off-design performance -- Renewables; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2020.112702
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: Innovative Power-to-Gas system with integration of co-electrolysis and methanation. Development of a model for the off-design operations of a Power-to-Gas process. Different configurations modelled and analyzed in commercial-tools environment. Integrated Power-to-Gas/wind system with real wind production profile. Effects of synthetic natural gas price in the economic evaluation. Abstract: In this study, the off-design performance of a Power-to-Gas process are predicted by means of a developed calculation model, implemented in commercial tool environments. With the aim to evaluate the behaviour of the several components in off-design conditions, specific calculation models have been integrated in the whole system model. Then, starting from a real wind production profile, four configurations of the Power-to-Gas system have been analysed, evaluating the annual operating time of the integrated Power-to-Gas/wind systems. In addition, in order to assess the cost effectiveness of the technology, a preliminary economic analysis has been performed. The results highlight that the most performant configuration is the one at ambient pressure, with the co-electrolyzer and the high temperature methanation section operating at the same temperature, showing a methane production of 184 ton/year and an overall efficiency of about 75%. At the current technology readiness level, the economic competitiveness of the process is strongly affected by the synthetic natural gas sell price.