Advanced multi-recovery techniques for enhancing efficiency in hydrogen fuel cell-based energy systems: An empirical study

IF 10.9 1区工程技术 Q1 ENERGY & FUELS

Energy Conversion and Management Pub Date : 2025-06-02 DOI:10.1016/j.enconman.2025.120004

Zhipeng Hua , Jintao Wu , Jiong Tang , Xianguang Cao , Jingjing Xu , Shanshan Cai , Zhengkai Tu

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Abstract

Hydrogen fuel cell-based systems offer a promising approach for efficient hydrogen energy utilization. On the basis of the traditional cogeneration system focusing on the heat recovery of fuel cell stacks, the innovative multi-recovery technology proposed in this paper further comprehensively considers the recovery of the cathode exhaust total heat (including sensible and latent heat), exhaust kinetic energy, power conversion device heat, and auxiliary components heat. An experimental platform was established to evaluate these technologies, with a primary focus on assessing the impact of exhaust latent heat recovery on system performance—marking the inaugural evaluation in this context. Experimental results reveal that the exhaust total heat recovery achieves up to 10.75 kW at an 85 kW output power of fuel, which is 4.30, 10.24, and 3.41 times greater than the recovery of exhaust kinetic energy, power conversion device heat, and auxiliary component heat, respectively. Additionally, increasing the fuel cell output power from 21 to 124 kW resulted in a total heat recovery improve by 149.44 %, with latent heat contributing 25.21 %. A reduction in cooling water temperature by 4–7 °C further enhanced latent heat recovery by 10.62 % to 36.90 %. Regarding operational impact, the exhaust total heat recovery reduces operating power by only 0.18 kW. Ultimately, the integration of these technologies resulted in a total system efficiency improvement of 8.82 % to 11.53 %, with a peak value of 97.31 %.

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提高氢燃料电池能源系统效率的先进多重回收技术：实证研究

基于氢燃料电池的系统为高效利用氢能源提供了一种很有前途的方法。在传统热电联产系统以燃料电池堆热回收为重点的基础上，本文提出的创新多重回收技术进一步综合考虑了阴极排气总热（包括显热和潜热）、排气动能、动力转换装置热、辅助部件热的回收。建立了一个实验平台来评估这些技术，主要侧重于评估排气潜热回收对系统性能的影响-这是在此背景下的首次评估。实验结果表明，在85 kW的燃料输出功率下，尾气总热回收达到10.75 kW，分别是尾气动能、动力转换装置热量和辅助部件热量回收的4.30倍、10.24倍和3.41倍。此外，将燃料电池输出功率从21千瓦提高到124千瓦，总热回收率提高了149.44%，潜热贡献了25.21%。冷却水温度降低4-7°C进一步提高潜热回收率10.62%至36.90%。在运行影响方面，排气总热回收仅减少0.18 kW的运行功率。最终，这些技术的集成使系统总效率提高了8.82%至11.53%，峰值为97.31%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy Conversion and Management 工程技术-力学

CiteScore

19.00

自引率

11.50%

发文量

1304

审稿时长

17 days

期刊介绍： The journal Energy Conversion and Management provides a forum for publishing original contributions and comprehensive technical review articles of interdisciplinary and original research on all important energy topics. The topics considered include energy generation, utilization, conversion, storage, transmission, conservation, management and sustainability. These topics typically involve various types of energy such as mechanical, thermal, nuclear, chemical, electromagnetic, magnetic and electric. These energy types cover all known energy resources, including renewable resources (e.g., solar, bio, hydro, wind, geothermal and ocean energy), fossil fuels and nuclear resources.