Abstract The integration of solar photovoltaic (PV) cell and high-temperature electrolysis cell to produce hydrogen is a promising means of solar energy storage and hydrogen harvesting. In this paper, a novel hydrogen production system is proposed by combining PV cell and photon-enhanced thermionic emission cell (PETE) with the solid oxide electrolysis cell (SOEC). The inlet steam of SOEC could be heated to a high temperature ranging from 800 °C to 1000 °C by the waste heat recovery of the PV cell and PETE module. The high-temperature steam and the electricity produced by PV cell and PETE module are fed into the SOEC together for H2 generation. High temperature electrolysis could decrease the Gibbs free energy required in water splitting, leading to less electricity cost at the expense of consuming more heat. PV cells can also be more efficient in a relatively low operation temperature by the waste heat recovery, and more electricity would be generated for hydrogen production. The first-law thermodynamic efficiency, solar exergy efficiency and solar-to-hydrogen efficiency (STH efficiency) of this proposed system could reach 77.05%, 55.99%, and 29.61%, respectively, which are expected to provide a theoretic basis for the research and application of convenient and efficient solar hydrogen generation.

中文翻译：

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光伏电池/光子增强热电子发射与高温电解槽一体化高效太阳能制氢系统的可行性

摘要 太阳能光伏（PV）电池和高温电解电池集成制氢是一种很有前景的太阳能储存和氢气收集手段。在本文中，通过将光伏电池和光子增强热离子发射电池（PETE）与固体氧化物电解电池（SOEC）相结合，提出了一种新型制氢系统。通过光伏电池和 PETE 组件的余热回收，SOEC 的入口蒸汽可以加热到 800°C 到 1000°C 的高温。光伏电池和PETE组件产生的高温蒸汽和电力一起送入SOEC用于制氢。高温电解可以降低水分解所需的吉布斯自由能，从而以消耗更多热量为代价降低电力成本。光伏电池还可以通过废热回收在相对较低的运行温度下更高效，并且可以产生更多的电力用于制氢。该系统的第一定律热力学效率、太阳能火用效率和太阳能制氢效率（STH效率）分别达到77.05%、55.99%和29.61%，有望为研究提供理论依据。和应用方便高效的太阳能制氢。