The energy production hierarchy: Which renewable technology should we install first?
エネルギー生産の階層構造：どの再生可能エネルギー技術を最初に導入すべきか？ (AI 翻訳)
Bashar Al Shawa
🤖 gxceed AI 要約
日本語
本研究はEU27か国を対象に、太陽光、風力、水力、地熱などの再生可能技術のエネルギー収支比（EROI）を比較。結果、8か国のみが最適な戦略（最高EROIかつ最大発電量の技術が最大シェア）を持つ。23か国は最低EROI（約15:1）を維持しつつ現在の電力需要を賄えるが、4か国は不可能で、協調的アプローチと社会のダウンスケーリングが必要と示唆。
English
This study compares the EROI of photovoltaic, wind, hydropower, and geothermal energy across EU27. Only 8 countries have an optimum renewable strategy where the highest-EROI technology also has the largest share. 23 countries can meet current electricity demand while maintaining a minimum EROI of ~15:1, but four cannot, supporting the need for collaborative energy transition and societal downscaling.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本は再生可能エネルギーの導入拡大を進めており、EROI概念はエネルギー計画の効率性評価に有用。本論文の手法を日本に適用すれば、各地域の特性に応じた最適な再エネ技術選定に貢献できる。
In the global GX context
EROI is a critical metric for the global energy transition. This paper provides a country-level EROI analysis for EU27, offering a replicable methodology for other regions. The finding that some countries cannot sustain the minimum EROI alone underscores the importance of cross-border cooperation and demand-side measures in achieving decarbonization.
👥 読者別の含意
🔬研究者:The EROI comparison methodology and country-level results provide a benchmark for further studies on renewable energy system efficiency.
🏢実務担当者:Utility and energy planners can use the EROI ranking to prioritize high-return technologies in their renewable energy portfolios.
🏛政策担当者:Policymakers should consider EROI alongside cost and capacity when designing renewable energy strategies, and recognize the need for regional collaboration and potential demand reduction.
📄 Abstract（原文）
To sustain modern society, the energy sector must maintain an Energy Return On Investment (EROI) ratio of ~15:1. With the imminent switch to renewable energy, this paper compares the EROI of photovoltaic, concentrated solar power, wind, hydropower, and geothermal energy for all European Union countries (EU27). The results show that only 8 countries currently have what could be described as an “optimum” renewable energy strategy – i.e., where the technology with the highest EROI <i>and</i> highest energy generation potential has the largest share of total renewable energy generation. More positively, 23 countries can produce their current electricity demand through renewable technologies whilst also maintaining the minimum EROI (~15:1). Notably, this entails that four countries are unable to do so – lending some support to the need for a collaborative approach in our energy transition and the necessity to “downscale” modern societies so that they can operate within their ecological ceiling.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.6084/m9.figshare.32819821first seen 2026-07-20 04:45:46 · last seen 2026-07-20 04:47:26
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