基于核能制氢的氢电联产系统能量梯级利用研究

Study on Energy Cascade Utilization of Hydrogen-electricity Cogeneration System Based on Nuclear Hydrogen Production

氢气是一种清洁、安全的能源,有助于解决未来许多重要的能源挑战。利用核能制氢可实现无碳排放的大规模工业制氢。本文提出一种基于热化学分解碘硫循环制氢工艺的高温气冷堆氢电联产方案。氢电联产方案能充分利用高温堆的高品位能源,其中高品位的热用于碘硫循环制氢,低品位热用于发电,实现氢气和电同时输出。本文建立了全面的[火用]分析模型,并对氢电联产系统的关键部件进行[火用]分析,得出系统中的[火用]损失分布及薄弱环节。同时探讨了氢电比对系统性能的影响,得到了不同氢电比下系统[火用]损失的变化规律。本文研究结果为进一步的氢电联产系统优化奠定了基础。

Hydrogen is a kind of clean and safe energy,which can help solve many important energy challenges in the future.Nuclear hydrogen production can achieve a large-scale industrial hydrogen production without carbon emission.This paper proposed a hydrogen-electricity cogeneration plan,which coupled with high temperature gas-cooled reactor and based on the thermochemical water-splitting iodine-sulfur process.The hydrogen-electricity cogeneration plan can make full use of the thermal energy derived from reactor.The high-temperature heat is used to hydrogen production from the iodine-sulfur process,and the low-temperature heat is used to generate electricity to achieve the simultaneous output of hydrogen and electricity.A comprehensive exergy analysis model was also established,exergy analysis was performed on the key components of the hydrogen-electricity cogeneration system,and the distribution of exergy loss and the weak parts in the design of the system were obtained.At the same time,the influence of hydrogen-electricity ratio on system performance was explored,and the change of exergy loss of the system was obtained under different hydrogen-electricity ratios.The results in this paper will lay a foundation for further optimization of hydrogen-electricity cogeneration system.