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Updated: Feb 28, 2026
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Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
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An Interactive Optimal Scheduling Method for Hydrogen Production System with Heat Recovery
Shengchen Li1, Wenbin Wu2, Zhenhang Wu3
1Qinghai Key Lab of Efficient Utilization of Clean Energy, School of Energy and Electrical Engineering, University of Qinghai, Xining 810016, China.
Entropy (Basel, Switzerland)
|February 27, 2026
Summary
This study introduces a novel thermodynamic cycle to recover waste heat from electrolytic hydrogen production, boosting efficiency and economic viability. The optimized system enhances hydrogen output by up to 9% using renewable energy sources.
Area of Science:
- Chemical Engineering
- Thermodynamics
- Renewable Energy Systems
Background:
- Renewable energy intermittency challenges the efficiency of electrolytic hydrogen production systems.
- Operating across multiple states reduces overall system performance and economic viability.
Purpose of the Study:
- To design and optimize a thermodynamic cycle for recovering electrolysis waste heat and integrating it with an alkaline electrolyzer.
- To enhance the exergy efficiency and economic performance of renewable-driven hydrogen production.
- To develop an optimal scheduling method for the heat-recovery system under fluctuating renewable energy supply.
Main Methods:
- Development of a detailed thermodynamic model for the hydrogen system and heat-recovery loop.
- Optimization of design and operating parameters for maximum exergy efficiency.
- Co-optimization of heat-exchanger structural parameters for economic viability.
- Implementation of an interactive optimization framework centered on the electrolyzer's temperature-efficiency curve.
Main Results:
- The proposed system with heat recovery significantly improves performance.
- Hydrogen production increased by up to 9% under wind scarcity conditions compared to systems without heat recovery.
- The interactive optimization framework effectively enhanced economic performance by jointly optimizing electrolyzer current and working-fluid mass flow.
Conclusions:
- The integrated heat-recovery system demonstrates practical viability for renewable-driven hydrogen production.
- Waste heat recovery is a crucial strategy for improving the efficiency and economics of intermittent renewable energy-powered electrolyzers.
- The developed scheduling method addresses the challenges of fluctuating renewable supply for enhanced hydrogen production.
Keywords:
alkaline electrolysereconomic analysisinteractive optimisationmulti-condition operationrenewable energy hydrogen productionwaste heat recoveryMore Related Videos
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