Study on off-design performance of a hydrogen and electricity joint production system utilizing a very-high-temperature reactor

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Design Pub Date : 2025-03-14 DOI:10.1016/j.nucengdes.2025.113987

Hang Ni , Xinhe Qu , Ping Zhang , Ekaterina Sokolova , Han Zhang , Khashayar Sadeghi , Wei Peng

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Abstract

This study introduces a hydrogen and electricity joint production system that utilizes a very-high-temperature reactor and integrates the iodine–sulfur cycle with the steam Rankine cycle. The system can operate under off-design conditions by adjusting the helium mass flow rates in the main and secondary loops, using constant pressure operation (CPO) or sliding pressure operation (SPO) for the power generation loop. The system’s performance is investigated at partial reactor thermal power. The recommended reactor thermal power load ratios range from 63.90 % to 100 % for CPO and from 64.29 % to 100 % for SPO, with the lower limit determined by the steam generator’s hot-end temperature difference. The hydrogen production rate and the system’s electrical power output both decline with a lower load ratio. Within the recommended load ratios, the hydrogen production rates for CPO and SPO range from 129.44 mol/s to 200 mol/s. With a lower load ratio, the power generation efficiency declines, while the hydrogen-electricity efficiency and system’s exergy efficiency first rise and then fall. At a fixed load ratio, the power generation efficiency, hydrogen-electricity efficiency, and system’s exergy efficiency are higher using SPO than those using CPO, indicating better off-design performance using SPO.

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利用超高温反应器的氢气和电力联合生产系统的非设计性能研究

本研究介绍了一种氢气和电力联合生产系统，该系统利用一个超高温反应器，将碘硫循环与蒸汽朗肯循环整合在一起。通过调整主回路和副回路中的氦气质量流量，该系统可在非设计条件下运行，发电回路采用恒压运行（CPO）或滑动压力运行（SPO）。在部分反应堆热功率下对系统性能进行了研究。推荐的反应堆热功率负载率范围为 CPO 63.90 % 至 100 %，SPO 64.29 % 至 100 %，下限由蒸汽发生器的热端温差决定。氢气生产率和系统电力输出都会随着负载率的降低而下降。在推荐的负载率范围内，CPO 和 SPO 的制氢率从 129.44 摩尔/秒到 200 摩尔/秒不等。负载率越低，发电效率越低，而氢-电效率和系统放能效率则先升后降。在固定负载率下，使用 SPO 的发电效率、氢电效率和系统放能效率均高于使用 CPO 的发电效率、氢电效率和系统放能效率，这表明使用 SPO 的非设计性能更好。

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

Nuclear Engineering and Design 工程技术-核科学技术

CiteScore

3.40

自引率

11.80%

发文量

377

审稿时长

5 months

期刊介绍： Nuclear Engineering and Design covers the wide range of disciplines involved in the engineering, design, safety and construction of nuclear fission reactors. The Editors welcome papers both on applied and innovative aspects and developments in nuclear science and technology. Fundamentals of Reactor Design include: • Thermal-Hydraulics and Core Physics • Safety Analysis, Risk Assessment (PSA) • Structural and Mechanical Engineering • Materials Science • Fuel Behavior and Design • Structural Plant Design • Engineering of Reactor Components • Experiments Aspects beyond fundamentals of Reactor Design covered: • Accident Mitigation Measures • Reactor Control Systems • Licensing Issues • Safeguard Engineering • Economy of Plants • Reprocessing / Waste Disposal • Applications of Nuclear Energy • Maintenance • Decommissioning Papers on new reactor ideas and developments (Generation IV reactors) such as inherently safe modular HTRs, High Performance LWRs/HWRs and LMFBs/GFR will be considered; Actinide Burners, Accelerator Driven Systems, Energy Amplifiers and other special designs of power and research reactors and their applications are also encouraged.