102069 20220426091137.0 doi 10.1016/j.ijhydene.2020.04.095 sideral 118226 ART-2020-118226 eng Romeo, L.M. Universidad de Zaragoza (orcid)0000-0001-7379-6159 Reducing cycling costs in coal fired power plants through power to hydrogen 2020 Access copy available to the general public Unrestricted The increase of renewable share in the energy generation mix makes necessary to increase the flexibility of the electricity market. Thus, fossil fuel thermal power plants have to adapt their electricity production to compensate these fluctuations. Operation at partial load means a significant loss of efficiency and important reduction of incomes from electricity sales in the fossil power plant. Among the energy storage technologies proposed to overcome these problems, Power to Gas (PtG) allows for the massive storage of surplus electricity in form of hydrogen or synthetic natural gas. In this work, the integration of a Power to Gas system (50 MWe) with fossil fuel thermal power plants (500 MWe) is proposed to reduce the minimum complaint load and avoid shutdowns. This concept allows a continuous operation of power plants during periods with low demand, avoiding the penalty cost of shutdown. The operation of the hybrid system has been modelled to calculate efficiencies, hydrogen and electricity production as a function of the load of the fossil fuel power plant. Results show that the utilisation of PtG diminishes the specific cost of producing electricity between a 20% and 50%, depending on the framework considered (hot, warm and cold start-up). The main contribution is the reduction of the shutdown penalties rather than the incomes from the sale of the hydrogen. At the light of the obtained results, the hybrid system may be implemented to increase the cost-effectiveness of existing fossil fuel power plants while adapting the energy mix to high shares of variable renewable electricity sources. info:eu-repo/grantAgreement/ES/MINECO-FEDER/ENE2016-76850-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 5.816 2020 CHEMISTRY, PHYSICAL 48 / 162 = 0.296 2020 Q2 T1 ENERGY & FUELS 37 / 114 = 0.325 2020 Q2 T1 ELECTROCHEMISTRY 9 / 29 = 0.31 2020 Q2 T1 1.212 2020 Condensed Matter Physics 2020 Q1 Renewable Energy, Sustainability and the Environment 2020 Q1 Fuel Technology 2020 Q1 Energy Engineering and Power Technology 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Peña, B. Universidad de Zaragoza (orcid)0000-0001-9967-5806 Bailera, M. Universidad de Zaragoza (orcid)0000-0002-9174-9820 Lisbona, P. (orcid)0000-0002-2306-6729 5004 590 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Máquinas y Motores Térmi. 45, 48 (2020), 25838-25850 Int. j. hydrogen energy International Journal of Hydrogen Energy 0360-3199 336541 http://zaguan.unizar.es/record/102069/files/texto_completo.pdf Postprint 1955153 http://zaguan.unizar.es/record/102069/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:102069 articulos driver 2022-04-26-08:54:11 ARTICLE