Abstract
To introduce the renewable energy in regional communities, it is necessary to select a sustainable energy mix with low environmental impact from the complex viewpoints. The purpose of this study is to develop a tool to optimize and evaluate renewable energy composition in municipalities considering multiple environmental criteria. This tool was developed by creating a database of energy demand and renewable energy supply potential of all municipalities in Japan and designing functions as evaluators. The developed tool successfully calculated optimal solutions in scenarios with different constraints and objective functions, and demonstrated a trade-off between ecosystem conservation and economic benefit.