HIM

HIM is an agent-based model for investment decisions in the German electricity and green hydrogen sectors. The included scripts allow the model to run without the GUI of Netlogo and multiple runs in parallel. It allows to generate the results from the paper Exploring the Scale-up of a Green Hydrogen Industry: An Agent-Based Modeling Approach in the International Journal for Hydrogen Energy.

The model distinguishes several agent types—such as electricity generators, electrolyzer investors, hydrogen purchasers, and potentially policy actors—that interact via market prices and investment signals. Each agent makes decentralized, bounded‑rational investment choices driven by techno‑economic conditions, expectations, and local constraints. Markets for electricity, hydrogen production, and electrolyzer capacity are interlinked: electricity supply and prices influence electrolyzer operation and profitability, while electrolyzer demand feeds back into electricity markets. HIM captures these dynamic feedbacks as agents iteratively adjust strategies and investments, producing path‑dependent scale‑up trajectories. Key outputs include time‑resolved trajectories of installed electrolyzer capacity, hydrogen production, market prices, and other indicators of industry expansion under varying assumptions, allowing analysis of how stakeholder behavior, market conditions, and policy measures affect the pace and feasibility of green‑hydrogen deployment.