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水素製造用50kW級PEM水電解システムの動的性能に関する実験研究

Experimental Study on Dynamic Performance of a 50 kW PEM Water Electrolysis System for Hydrogen Production (原題)

Guoqing Liu, Wei Xia, Guozheng Wang, Xiaojun Zhao, Song Hu, Haicheng Fu, Wenmiao Chen, Yangyang Li

Energies📚 査読済 / ジャーナル2026-08-17#水素経営インパクト: コスト削減対象セクター: hydrogen
DOI: 10.3390/en19163844
原典: https://doi.org/10.3390/en19163844
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🤖 gxceed AI 要約

日本語

本研究は、50kW級PEM水電解システムの動的挙動を実験的に解明した。負荷変動、圧力変化、冷間起動時の電圧・温度・ガス組成・消費電力の応答を測定し、電気的応答は速いが熱的応答は遅く、ガス組成は分単位の遅れがあることを示した。全負荷時の消費電力は69.7kWで、変動再エネ入力下での動的運転に有用なデータを提供する。

English

This study experimentally investigates the dynamic performance of a 50 kW-class PEM water electrolysis system. It measures responses of voltage, temperature, gas composition, and power consumption under load changes, pressure variation, and cold start. Results show fast electrical response but slow thermal and gas-composition dynamics, with total power consumption of 69.7 kW at full load, providing data for dynamic operation with variable renewable power.

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、再エネ水素の導入拡大を目指している。本研究成果は、変動する再エネ電源に追従する水電解システムの設計・運用に直接貢献し、国内の水素サプライチェーン構築やFIT/FIP下での再エネ水素コスト低減に有用な知見を提供する。

In the global GX context

Globally, green hydrogen is key to decarbonization, and PEM electrolysis is favored for its flexibility. This study provides rare system-level experimental data on dynamic behavior, which is crucial for integrating electrolyzers with variable renewables and for grid services. It supports the design of efficient and safe hydrogen production systems, relevant to global hydrogen strategies and renewable integration targets.

👥 読者別の含意

🔬研究者:Provides empirical dynamic response data for PEM electrolysis systems, useful for modeling and control research.

🏢実務担当者:Informs operational strategies for hydrogen plants to handle variable renewable input and optimize efficiency.

🏛政策担当者:Highlights the technical readiness of PEM electrolysis for renewable hydrogen production, supporting policy incentives.

📄 Abstract（原文）

With the acceleration of the global energy transition, hydrogen is increasingly considered a potential energy carrier for renewable-energy integration, large-scale energy storage, and industrial decarbonization. Proton exchange membrane (PEM) water electrolysis is well suited to variable renewable power because of its fast load response, wide operating range, and compact system structure. However, most existing studies focus on steady-state performance, materials, or model-based analysis, while system-level experimental data on the dynamic behavior of industrial-scale PEM water electrolysis systems remain limited. In this study, the dynamic performance of a 50 kW-class PEM water electrolysis system was experimentally investigated under stepwise load changes, pressure variation, and cold-start conditions. The responses of voltage, temperature, pressure, hydrogen-in-oxygen (HTO), oxygen-in-hydrogen (OTH), and system energy consumption were analyzed. The voltage followed current step changes within seconds, indicating a fast electrical response. In contrast, the thermal response was much slower, and the system required approximately 34 min to approach the rated thermal condition from a cold start. The gas-composition measurements exhibited minute-scale response delays and gradual settling after changes in operating conditions. When the operating pressure increased from 1.2 MPa to 2.9 MPa, the HTO content increased from 0.383% to 0.545%. When the current increased from 300 A to 1200 A, the OTH content decreased from 1001.77 ppm to 5.86 ppm. Energy-flow analysis showed that the total system power consumption under full-load operation was 69.7 kW, including the electrolyzer-related part and balance-of-plant consumption. These results clarify the different response time scales of electrical, thermal, and gas-composition variables in a 50 kW-class PEM water electrolysis system and provide experimental support for dynamic operation under variable renewable power input.

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