AI 中文总结
针对寒冷地区大规模ReP2H工厂频繁启停的热应力等问题，提出全厂级热拓扑与分层电-热管理框架，通过双向热耦合实现预热等功能，可消除冷启动、提升产氢效率并降低成本。
AI 中文摘要
大规模寒冷地区的可再生电力制氢（ReP2H）工厂在频繁启停运行时存在启动时间长、反复受热应力影响的问题，碱性电解槽、工厂辅助系统（BoP）、工厂热公用工程系统（PTUS）及厂房之间缺乏协调的热管理，进一步加剧了该问题。本文提出一种全厂级热拓扑结构及分层电-热管理框架以解决上述问题：电解槽集群与PTUS间的双向热耦合可实现预加热、热待机及废热回收，同时将分钟级生产调度与秒级热调节相协调。基于中国北方一座80 MW工厂的案例研究表明，该框架可全年消除冷启动，使氢气产量提高1.50，能量效率和㶲效率分别提升0.99和4.33个百分点，氢气平准化成本降低3.22%，还能减少热疲劳损伤及启停导致的电压衰减。
英文摘要
Large-scale renewable power-to-hydrogen (ReP2H) plants in cold regions suffer from prolonged startup and repeated thermal stress during frequent startup-shutdown operation. The situation becomes worse due to the lack of coordinated heat management among the alkaline electrolysis stacks, balance of plant (BoP), plant thermal utility system (PTUS), and plant building. This paper presents a plant-wide thermal topology and a hierarchical electricity-heat management framework to address the issues. Bidirectional thermal coupling between the stack cluster and PTUS enables preheating, thermal standby, and waste heat recovery, while minute-scale production scheduling is coordinated with second-scale thermal regulation. Case studies based on an 80 MW plant in Northern China show that the proposed framework eliminates cold startups in year round, increases hydrogen yield by 1.50, improves energy and exergy efficiencies by 0.99 and 4.33 percentage points, respectively, and reduces the levelized cost of hydrogen by 3.22%. It also reduces thermal fatigue damage and startup-shutdown-induced voltage degradation.
