小型5kWアルカリ水電解槽プロトタイプのサイズと印加電圧による性能の実験的調査
Experimental Investigation of two low-cost 5 kW alkaline electrolyzer prototypes' performances depending on size and applied voltage (原題)
Rabillard, Lilian, Thappily, Praveen, Matheswaran, Priyadharshini, Inguanta, Rosalinda, Kim, Myeongsub, Lipkin, Michael, Kozlova, Tatyana V., Latieff, Farkad, Mandin, Philippe
🤖 gxceed AI 要約
日本語
本研究は、エネルギー転換に向けた水素製造技術の効率化を目指し、5kW級アルカリ水電解槽の性能を実験的に評価した。電極面積、電解質濃度、温度、電圧が水素生成量と効率に与える影響を分析し、400cm2スタックが高濃度で優れた電流密度を示すことを明らかにした。また、水素生成速度は電圧と濃度に比例して増加し、最大5SLPMに達した。これらの知見は、工業用水素製造用電解槽の設計最適化に貢献する。
English
This study experimentally evaluates the performance of 5 kW alkaline electrolyzers for hydrogen production, focusing on the effects of electrode area, electrolyte concentration, temperature, and voltage. The 400 cm2 stack achieved higher current density at high concentrations, and hydrogen production rate increased linearly with voltage and concentration, reaching 5 SLPM. These findings inform the design of more efficient and cost-effective electrolyzers for industrial hydrogen production.
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
日本は水素基本戦略を掲げ、水素供給網の構築を進めており、電解槽の効率向上は国産水素コスト低減に直結する。本研究成果は、国内の水素製造技術開発やグリーン水素導入促進に寄与する可能性がある。
In the global GX context
Globally, hydrogen is a key pillar of decarbonization strategies, and improving electrolyzer efficiency is critical for reducing green hydrogen costs. This experimental study provides insights into optimizing electrolyzer design, which is relevant for scaling up hydrogen production to meet climate targets.
👥 読者別の含意
🔬研究者:Provides experimental data on electrolyzer performance that can inform modeling and design optimization for hydrogen production systems.
🏢実務担当者:Offers practical insights into operating parameters that can improve efficiency and reduce costs in electrolyzer-based hydrogen production.
📄 Abstract（原文）
In light of the energy transition, developing efficient and scalable hydrogen production technologies is essential for reducing greenhouse gas emissions and meeting global energy needs. Studying the electrical performance of electrolyzers, this study examines the effect of various parameters such as surface area, electrolyte concentration, temperature, and applied voltage on hydrogen production and efficiency. The experimental setup involved the evaluation of five electrolyzer stacks with surface areas of both 400 cm2 and 825 cm2. The electrolytes were the NaOH aqueous solutions with mass concentrations of 1 wt%, 3 wt%, and 5 wt%. At the same time, the cell voltage varied between 10 V and 15 V. For the 400 cm2 stack, a 1 kW power output was achieved at a 5 wt% electrolyte concentration and a voltage range of 13 V–15 V. The 825 cm2 stack also reached a similar power output, but at a lower concentration of 4 wt%. At higher electrolyte concentrations, the 400 cm2 stack outperformed the 825 cm2 stack in terms of current density. With 0.181 A/cm2 at 15 V and 5 wt%, it exceeded the 0.1 A/cm2 benchmark for efficient operation. According to temperature analysis, the temperature increased linearly to 60 °C before approaching 90 °C asymptotically. To prevent boiling and possible system damage, safety procedures were put in place to cease operation at 85 °C. Concerning hydrogen production, the 400 cm2 stacks showed a linearly increasing volumetric flow rate with voltage and NaOH concentration, reaching a maximum of 5 SLPM at 15 V and 5 wt%. These findings carry crucial implications for the design of more efficient and cost-effective electrolyzers for industrial hydrogen production.
🔗 Provenance — このレコードを発見したソース
- base https://hdl.handle.net/10447/677128first seen 2026-09-01 12:05:05
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