The ongoing energy transition has accelerated renewables integration within many sectors requiring addressment of their intermittency challenges. Implementing hydrogen energy storage with renewables is a solution; however, Renewable-Hydrogen hybrid systems come with their effective sizing and energy management challenges. This paper reports the development of an effective capacity sizing and energy management model of hybrid Photovoltaic-Hydrogen energy system for grid-connected buildings to ensure reliable buildings sector decarbonization. The developed model was implemented on one of Robert Gordon University buildings, on the North-East coast of Scotland, as a case-study. From the results the best-suited PV system size was found to be 4.31-MW, designed using 14368 PV modules each rated 300-W and 4 inverter units each rated 1-MW, with 23.5 km2 installation area required. Simulation results showed the output energy from this PV system allowed supplying around 38% of building demands with green energy. The size of the hydrogen energy storage system components suited to support this PV system intermittency was found to be 2.28-MW electrolyser, 500-kW fuel cell and 1331 kg gaseous hydrogen storage tank. Mathematical modelling was developed for simulating this hydrogen energy storage system operation. An energy management model was then developed within MATLAB environment to schedule the operation of the proposed hybrid PV-H2 system components and the grid in supplying the building demands. Results have indicated that integrating the proposed hydrogen energy storage system with the PV system has improved the solar energy utilization by about 57% and raised the building green energy supply to around 59% resulting into reduction of grid power import equivalent to 612,005.76 kgCO2e/year.
ATTEYA, A.I., ALI, D. and HOSSAIN, M. 2022. Developing an effective capacity sizing and energy management model for integrated hybrid photovoltaic-hydrogen energy systems within grid-connected buildings. In Proceedings of the 11th International conference on Renewable power generation (RPG 2022): meeting net zero carbon, 22-23 September 2022, London, UK: [virtual event]. New York: IET [online], pages 204-212. Available from: https://doi.org/10.1049/icp.2022.1823