Organic Rankine Cycle Utilization for Green Hydrogen Production in Geothermal Power Plants: Review
地熱発電所における有機ランキンサイクルを利用したグリーン水素製造：レビュー (AI 翻訳)
Yanuar Rachmat, Mochammad Resha
🤖 gxceed AI 要約
日本語
本レビューは、地熱発電所における有機ランキンサイクル（ORC）技術を活用したグリーン水素製造の統合について包括的に検討。作動流体の選択、ORC構成、地熱流体温度などの性能要因を分析し、水素製造コストが1.1～4.2 USD/kg H₂と経済的に競争力があることを示す。廃熱を利用した電解槽予熱が効率向上に有効であり、再生可能エネルギー変動対策として期待される。
English
This review comprehensively examines the integration of Organic Rankine Cycle (ORC) technology in geothermal power plants for green hydrogen production. It analyzes key factors such as working fluid selection, ORC configurations, and geothermal fluid temperature. Hydrogen production costs range from 1.1 to 4.2 USD/kg H₂, demonstrating economic competitiveness. Utilizing waste heat for electrolyzer preheating significantly improves efficiency, offering a promising solution for renewable energy intermittency.
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
日本は地熱資源を有しながら開発が限定的であり、本レビューは地熱発電の付加価値向上と水素サプライチェーン構築に示唆を与える。2050年カーボンニュートラル目標に向け、SSBJやGX政策との連動が期待される。
In the global GX context
This review is globally relevant as it addresses the integration of geothermal base-load power with hydrogen production, a key challenge in renewable energy systems. It provides techno-economic benchmarks for ORC-electrolyzer systems, informing ISSB-aligned climate disclosures and transition finance assessments for geothermal-hydrogen projects worldwide.
👥 読者別の含意
🔬研究者:Provides a systematic overview of ORC-geothermal-hydrogen integration, identifying critical design parameters and cost ranges for further optimization studies.
🏢実務担当者:Offers a clear framework for evaluating technical and economic feasibility of green hydrogen production from geothermal plants, useful for project development and investment decisions.
🏛政策担当者:Highlights the potential of geothermal-ORC-hydrogen pathways to support energy storage and decarbonization, which can inform national hydrogen strategies and renewable energy subsidies.
📄 Abstract（原文）
The global shift towards renewable energy necessitates solutions for intermittency and energy storage. This review comprehensively examines the integration of Organic Rankine Cycle (ORC) technology in geothermal power plants for sustainable green hydrogen production. Geothermal energy provides a stable, base-load heat source, which the ORC effectively converts into electricity to power water electrolysis, overcoming the variability of other renewables like solar and wind. The analysis highlights that the choice of organic working fluid (e.g., R245fa, R123, Isobutane) is critical for system performance, hydrogen production rate, and economic feasibility. Furthermore, advanced ORC configurations (e.g., regenerative, dual-pressure) generally yield higher efficiency and power output, albeit with increased complexity and cost. The temperature and flow rate of the geothermal fluid are identified as paramount factors, where higher temperatures typically increase hydrogen output and reduce costs, though an optimal balance must be found to avoid escalating operational expenses. A key strategy for improving economic performance is utilizing waste geothermal heat to preheat water for electrolysis, significantly reducing its electrical energy demand. Thermoeconomic assessments indicate that this integrated approach can be economically competitive, with reported hydrogen production costs ranging from approximately 1.1 to 4.2 USD/kg H₂ and attractive payback periods. In conclusion, coupling geothermal-powered ORC systems with electrolyzers represents a promising and synergistic pathway for producing green hydrogen, enhancing the viability of geothermal plants and contributing to the clean energy landscape.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.58451/ijebss.v3i8.293first seen 2026-05-15 19:33:19
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