Improving energy access and environmental sustainability in small communities through hydrogen integration

Relying on renewable energy for small communities is challenging due to intermittency, while hydrogen offers a reliable, long-term storage solution. Yet, there are questions regarding the involvement of hydrogen in the optimal renewable energy configuration. This paper develops a tri-objective optimization model for the selection and capacity allocation of energy technologies to minimize the annual costs, minimize environmental impact, and maximize social utility for small communities. The model assesses the role of hydrogen in a hybrid renewable energy system to evaluate grid reliability, its contribution to global warming mitigation, and the distinctive dynamics associated with community size. Liverpool in Nova Scotia, Canada, was chosen as a case study due to its promise of renewable energy advancement and inconsistent grid access. The initial results suggest a set of technologies such as wind turbines, combined heat and power, organic Rankine cycle, and the grid. By extending the analysis to 2050, it is projected that the utilization of wind turbines and fuel cells will double, while grid connection becomes unnecessary as hydrogen technologies mature. The matured hydrogen scenario shows a 63% reduction in environmental impact and a 4% improvement in social utility. • Develops a model to optimize renewable energy systems including hydrogen storage. • Integrates economic, environmental, and social sustainability in the model. • Advocates social and environmental advantages of hydrogen energy. • Evaluates different scenarios for the feasibility of hydrogen generation. • Outlines three strategic alternatives to mitigate global warming in this sector.