Design and Control of Atmospheric Water Electrolysis Systems for Green Hydrogen in Arid Environments
乾燥環境における大気水電解システムの設計と制御：グリーン水素製造 (AI 翻訳)
Elgamal G, El-Shabasy A, Abdelkhalek M, Hamed A, Abdelkader A
🤖 gxceed AI 要約
日本語
乾燥地域での水不足を解決するため、大気中の水分を利用した2つの水電解システム（直接空気電解と除湿機併用アルカリ電解）を設計・比較。カイロの低湿度条件で、直接空気電解はLCOH 4.7ドル/kg（フルコストで5.8ドル/kg）を達成し、除湿機方式より約15%低コスト。制御フレームワークとプロトタイプも提示。
English
This study designs and compares two atmospheric-moisture-based electrolysis systems for green hydrogen in arid regions: a Direct Air Electrolyzer (DAE) and a hybrid dehumidifier-alkaline electrolyzer (DH-AE). For Cairo's low humidity, the DAE achieves a levelized cost of hydrogen (LCOH) of 4.7 USD/kg (5.8 USD/kg fully loaded), about 15% lower than DH-AE. A closed-loop control framework and prototypes are presented, offering a water-independent pathway for decentralized green hydrogen.
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
日本は水素社会の実現を目指しており、海外でのグリーン水素製造技術の進展は、日本の水素サプライチェーン構築や国際協力に示唆を与える。特に、水不足地域での水素製造は、日本の技術輸出や国際的な脱炭素貢献の可能性を示す。
In the global GX context
This paper contributes to global green hydrogen research by addressing water scarcity in arid regions, a key barrier to scaling renewable hydrogen. The techno-economic analysis and control framework offer insights for decentralized hydrogen production, relevant to regions like MENA and Australia, and align with global efforts to reduce hydrogen costs and expand clean energy access.
👥 読者別の含意
🔬研究者:Provides a detailed comparison of atmospheric water electrolysis systems with efficiency and cost data, useful for advancing water-independent hydrogen production research.
🏢実務担当者:Offers a viable technology pathway for green hydrogen production in water-scarce regions, with cost benchmarks and control strategies that can inform project development.
🏛政策担当者:Highlights the potential of atmospheric water electrolysis to enable hydrogen production in arid regions, supporting energy security and decarbonization goals.
📄 Abstract（原文）
<title>Abstract</title> <p>Freshwater scarcity limits green hydrogen production in arid regions like the Middle East and North Africa (MENA), despite high solar potential. This study compares two atmospheric-moisture-based systems: a Direct Air Electrolyzer (DAE) using a hygroscopic H₂SO₄ electrolyte in a porous sponge, and a hybrid dehumidifier–alkaline electrolyzer (DH-AE) that condenses ambient moisture via vapor-compression refrigeration. Both are designed for Cairo's worst-case relative humidity (RH = 38.19%). The four-module DAE sizing is anchored to a platinum-referenced electrochemical ceiling (1.686 V per module, 87.8% energy efficiency, 97.3% electrolysis efficiency). For the SS‑904L stainless-steel prototype employed herein, an electrode-material correction (80–140 mV penalty) yields a realistic operating band of 1.766–1.826 V and an energy efficiency of 81.1–83.9%, which brackets the measured prototype range of 1.82–1.95 V. The DH‑AE achieves equivalent output at 68.5% overall efficiency. Thermal simulations (ANSYS) confirm safe operation of SS‑904L electrodes within the iso-corrosion envelope. A closed-loop control framework (humidity/temperature sensing, PID current regulation, SCADA) is proposed and validated in simulation, enabling autonomous operation. Techno-economic analysis for 50–1,000 kg·day⁻¹ shows a benchmark levelized cost of hydrogen (LCOH) of 4.7 USD·kg⁻¹ for the DAE at 1,000 kg·day⁻¹. When full maintenance, electrolyte replenishment, and long-term degradation are included, the fully loaded LCOH rises to approximately 5.8 USD·kg⁻¹—yet this remains roughly 15% lower than the comparable DH‑AE estimate. Prototype implementations are presented. Overall, atmospheric-moisture-based electrolysis offers a viable, decentralized, water-independent pathway for green hydrogen in arid environments.</p>
🔗 Provenance — このレコードを発見したソース
- Research Square https://doi.org/10.21203/rs.3.rs-9961794/v1first seen 2026-08-07 04:38:07
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