Pilot-scale hydrogen energy utilization system demonstration: A commercial building case study on on-site green hydrogen production and use

摘要

? 2022 Hydrogen Energy Publications LLCA demonstration of the Hydro Q-BiC?, i.e., a pilot-scale green hydrogen energy utilization system consisting of 64.75-kW photovoltaic (PV) panels, a 5-Nm3/h water electrolyzer, 40 Nm3 of metal hydride hydrogen storage, 14-kW fuel cells, and 20-kW/20-kWh Li-ion batteries, is discussed here. We set up our hydrogen system in front of a market administration building with demands that differ from those of a typical business building. The purpose of this study is to demonstrate the practicability of the green hydrogen system. The demonstration tests include 24-h experiments with various weather conditions: clear, cloudy, and clear to rainy; the CO2 reduction capability evaluation is based on the results. In all cases, the CO2 reduction capability is shown to be better than that of the PV-only system. However, the utilization of grid power for hydrogen production is proven to be of concern in the event of drastic and unexpected changes in weather conditions. Simulating annual CO2 emissions indicates that the Hydro Q-BiC? can reduce emissions by more than 50. We believe our findings can develop the practical application of hydrogen energy systems for buildings.