水素製造における水電解の非再生可能および再生可能エクセルギー費用
Non-renewable and renewable exergy costs of water electrolysis in hydrogen production (原題)
Lima, Alessandro José, Torrubia, Jorge, Valero, Alicia, Valero, Antonio
🤖 gxceed AI 要約
日本語
水電解による水素製造のエクセルギー費用を、非再生可能と再生可能に分解して評価。4種類の電解槽と複数の電力源シナリオを分析し、電力源が費用の大部分を占めることを示した。インフラの非再生可能エクセルギー費用の重要性と、材料リサイクルの必要性を強調。
English
This study evaluates the exergy cost of hydrogen production via water electrolysis, disaggregating into non-renewable and renewable contributions. Analyzing four electrolyzer types and various electricity scenarios, it finds electricity sources dominate costs. It highlights the significance of non-renewable exergy costs in infrastructure and the need for cleaner production and recycling.
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
日本の水素戦略（水素基本戦略、グリーンイノベーション基金）に示唆。電解槽のインフラ資源制約と再生可能度評価は、国内の水素サプライチェーン構築やLCA評価に有用。
In the global GX context
This paper contributes to global hydrogen economy discussions by quantifying the renewability of electrolytic hydrogen, relevant for certification schemes and lifecycle assessments under EU and international frameworks.
👥 読者別の含意
🔬研究者:Provides a methodological framework for assessing the true renewability of hydrogen production, useful for LCA and energy system modeling.
🏢実務担当者:Informs technology selection and supply chain decisions for hydrogen projects, highlighting material constraints and grid dependency.
🏛政策担当者:Supports policy design for clean hydrogen standards and recycling mandates, emphasizing the need to consider infrastructure exergy costs.
📄 Abstract（原文）
Hydrogen production via water electrolysis and renewable electricity is expected to play a pivotal role as an energy carrier in the energy transition. This fuel emerges as the most environmentally sustainable energy vector for non-electric applications and is devoid of CO2 emissions. However, an electrolyzer’s infrastructure relies on scarce and energy-intensive metals such as platinum, palladium, iridium (PGM), silicon, rare earth elements, and silver. Under this context, this paper explores the exergy cost, i.e., the exergy destroyed to obtain one kW of hydrogen. We disaggregated it into non-renewable and renewable contributions to assess its renewability. We analyzed four types of electrolyzers, alkaline water electrolysis (AWE), proton exchange membrane (PEM), solid oxide electrolysis cells (SOEC), and anion exchange membrane (AEM), in several exergy cost electricity scenarios based on different technologies, namely hydro (HYD), wind (WIND), and solar photovoltaic (PV), as well as the different International Energy Agency projections up to 2050. Electricity sources account for the largest share of the exergy cost. Between 2025 and 2050, for each kW of hydrogen generated, between 1.38 and 1.22 kW will be required for the SOEC-hydro combination, while between 2.9 and 1.4 kW will be required for the PV-PEM combination. A Grassmann diagram describes how non-renewable and renewable exergy costs are split up between all processes. Although the hybridization between renewables and the electricity grid allows for stable hydrogen production, there are higher non-renewable exergy costs from fossil fuel contributions to the grid. This paper highlights the importance of non-renewable exergy cost in infrastructure, which is required for hydrogen production via electrolysis and the necessity for cleaner production methods and material recycling to increase the renewability of this crucial fuel in the energy transition.
🔗 Provenance — このレコードを発見したソース
- base http://zaguan.unizar.es/record/153089first seen 2026-09-06 06:05:33 · last seen 2026-09-07 05:37:33
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