Enhancing solar-powered hydrogen production efficiency by spectral beam splitting and integrated chemical energy storage

IF 10.1 1区工程技术 Q1 ENERGY & FUELS Applied Energy Pub Date : 2024-07-09 DOI:10.1016/j.apenergy.2024.123833

Juan Fang , Miaomiao Yang , Junpeng Sui , Tengqi Luo , Yinsheng Yu , Yunjin Ao , Ruifeng Dou , Wenning Zhou , Wei Li , Xunliang Liu , Kai Zhao

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Abstract

Solar energy-powered electrolytic water splitting represents a promising avenue for hydrogen production. However, current technologies for solar-driven hydrogen generation still face the challenges such as low efficiency and significant fluctuations in solar energy availability. This paper proposes a full-spectrum solar hydrogen production system integrated with spectral beam splitting technology and chemical energy storage to address these issues. The high-grade solar energy is allocated for generating electricity through photovoltaic cells, while the low-grade solar energy is utilized in the dry reforming of methane (DRM) process to produce syngas, which in turn is used for flexible electricity generation. Dispatchable electricity converting from syngas, along with intermittent electricity form photovoltaic cells, powers a solid oxide electrolysis cell (SOEC) to produce hydrogen. The results demonstrate that the energy efficiency is 32.08%. In addition, more than half (56.6%) of the electrolysis capacity can be utilized during night hours due to thermochemical energy storage (syngas). In addition, a year-long operation simulation showed that the system can diminish CO₂ emission by 25.7% to produce the same amount of hydrogen. The full-spectrum solar hydrogen production system provides a viable option for the transition from fossil energy to renewable energy.

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通过光谱分束和集成化学储能提高太阳能制氢效率

太阳能驱动的电解水分裂是一种前景广阔的制氢途径。然而，目前的太阳能制氢技术仍然面临着效率低、太阳能可用性波动大等挑战。本文针对这些问题，提出了一种集成了光谱分束技术和化学储能的全光谱太阳能制氢系统。高品位太阳能通过光伏电池用于发电，而低品位太阳能则用于甲烷干重整（DRM）工艺，生产合成气，进而用于灵活发电。由合成气转化而来的可调度电力与光伏电池产生的间歇性电力一起为固体氧化物电解池（SOEC）提供动力，以生产氢气。结果表明，能源效率为 32.08%。此外，由于热化学储能（合成气）的作用，超过一半（56.6%）的电解能力可在夜间使用。此外，长达一年的运行模拟显示，在生产相同数量氢气的情况下，该系统可减少 25.7% 的二氧化碳排放。全光谱太阳能制氢系统为化石能源向可再生能源过渡提供了一个可行的选择。

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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.