A hydrogen supply system utilizing PEMFC exhaust heat and modular metal hydride tanks for hydrogen-powered bicycles

IF 11 1区工程技术 Q1 ENERGY & FUELS

Applied Energy Pub Date : 2025-09-25 DOI:10.1016/j.apenergy.2025.126760

Shan Miao , Tomoya Ezawa , Masami Sumita , Koki Harano , Ayane Imai , Noboru Katayama , Kiyoshi Dowaki

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引用次数: 0

Abstract

A compact hydrogen supply system for thermally integrating metal hydride (MH) tanks with a proton exchange membrane fuel cell (PEMFC) for a hydrogen-powered electric-assist bicycle (H-bike) is proposed. The system recovers the exhaust heat generated by the PEMFC to sustain hydrogen desorption and improve the system's energy efficiency. The results demonstrate that the split-tank strategy decreases thermal and pressure gradients and enhances heat transfer and hydrogen release. The honeycomb tank configuration further improves hydrogen desorption by promoting uniform airflow distribution around each tank, thereby improving exhaust heat utilization from the PEMFC. It employs a layer-adjustable configuration, facilitating the flexible adaptation of MH cartridge quantities to meet hydrogen demand and prevailing road conditions in urban areas. Under a PEMFC power output of 215 W, the system maintains a stable hydrogen flow rate for over 30 min, with a heat recovery efficiency of 22.62 %. Furthermore, increasing the number of MH cartridge layers significantly improves the thermal utilization of the system, achieving a utilization efficiency of 39.90 % with two layers. These findings confirm the feasibility and scalability of the proposed system for H-bike, highlighting its potential as a decentralized hydrogen supply solution for lightweight mobility and urban transportation applications.

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氢动力自行车用PEMFC废热和模块化金属氢化物罐的供氢系统

提出了一种用于氢动力电动自行车（H-bike）热集成金属氢化物（MH）罐和质子交换膜燃料电池（PEMFC）的紧凑型供氢系统。该系统回收PEMFC产生的废热，以维持氢的解吸，提高系统的能源效率。结果表明，分罐策略减小了热梯度和压力梯度，促进了传热和氢气释放。蜂窝罐结构通过促进每个罐周围均匀的气流分布进一步改善了氢气的解吸，从而提高了PEMFC的废热利用率。它采用分层可调的配置，便于灵活调整MH药筒的数量，以满足城市地区的氢气需求和普遍的道路状况。在输出功率为215 W的PEMFC下，系统能保持30 min以上的稳定氢气流量，热回收效率为22.62%。此外，增加MH装药层数显著提高了系统的热利用率，两层MH装药的热利用率达到39.90%。这些发现证实了H-bike系统的可行性和可扩展性，突出了其作为轻型交通和城市交通应用的分散氢供应解决方案的潜力。

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来源期刊

Applied Energy 工程技术-工程：化工

CiteScore

21.20

自引率

10.70%

发文量

1830

审稿时长

41 days

期刊介绍： Applied Energy serves as a platform for sharing innovations, research, development, and demonstrations in energy conversion, conservation, and sustainable energy systems. The journal covers topics such as optimal energy resource use, environmental pollutant mitigation, and energy process analysis. It welcomes original papers, review articles, technical notes, and letters to the editor. Authors are encouraged to submit manuscripts that bridge the gap between research, development, and implementation. The journal addresses a wide spectrum of topics, including fossil and renewable energy technologies, energy economics, and environmental impacts. Applied Energy also explores modeling and forecasting, conservation strategies, and the social and economic implications of energy policies, including climate change mitigation. It is complemented by the open-access journal Advances in Applied Energy.