渠秀媛, 李青山, 余潜跃, 等. 面向海上风电的碱性电解水制氢系统热力学分析与优化设计[J]. 中国舰船研究, 2024, 19(X): 1–10. doi: 10.19693/j.issn.1673-3185.03658
引用本文: 渠秀媛, 李青山, 余潜跃, 等. 面向海上风电的碱性电解水制氢系统热力学分析与优化设计[J]. 中国舰船研究, 2024, 19(X): 1–10. doi: 10.19693/j.issn.1673-3185.03658
QU X Y, LI Q S, YU Q Y, et al. Thermodynamic analysis and optimization design of alkaline water electrolysis to hydrogen production system for offshore wind[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–10 (in Chinese). doi: 10.19693/j.issn.1673-3185.03658
Citation: QU X Y, LI Q S, YU Q Y, et al. Thermodynamic analysis and optimization design of alkaline water electrolysis to hydrogen production system for offshore wind[J]. Chinese Journal of Ship Research, 2024, 19(X): 1–10 (in Chinese). doi: 10.19693/j.issn.1673-3185.03658

面向海上风电的碱性电解水制氢系统热力学分析与优化设计

Thermodynamic analysis and optimization design of alkaline water electrolysis to hydrogen production system for offshore wind

  • 摘要:
    目的 为了最大化利用电能与海水资源,针对海上风电的碱性电解水制氢系统进行热力学分析和优化设计,研究工作压力、工作温度、碱液流量等对系统运行特性的影响。
    方法 基于热力学、电化学及质量平衡模型,通过Aspen Plus软件建立碱性电解水制氢的热力学平衡模型,并与实验结果进行对比验证。
    结果 结果表明,此方案碱性电解水制氢系统最佳工作压力和工作温度分别为9 bar和70 ℃,最佳碱液流量为1 600 t/h。系统能量损失和㶲损随输入电流密度的增加而增加。AWE输入电流密度为3 000 A/m2时,系统能量效率和㶲效率分别为63.58%和57.27%,系统能量损失占总能量投入的26%,其中电解槽㶲损最高,占系统总㶲损的93.39%。
    结论 通过该参数优化方法,可以得到合适的工作参数范围,能够为海上风电制氢参数选择提供参考。

     

    Abstract:
    Objectives In order to fully leverage electricity and seawater resources, a thermodynamic analysis and optimal design of the electrolytic water hydrogen production system for offshore wind power are conducted. The study focuses on the impact of operating pressure, temperature, and lye flow rate on the operational characteristics of the system.
    Methods Thermodynamic, kinetic and flux balance analyses were carried out to develop a thermodynamic equilibrium model for hydrogen production by alkaline water electrolysis using Aspen Plus software, which was validated in comparison with Experimental results.
    Results The results show that the optimum working pressure and temperature of the alkaline water electrolysis hydrogen production system of this scheme are 9 bar and 70 ℃, respectively, and the optimum lye flow rate is 1600 t/h. The system energy loss and yield loss increased with the increase of input current density. When the AWE input current density was 3000 A/m2, the system energy efficiency and yield efficiency were 63.58% and 57.27%, respectively, and the system energy loss accounted for 26% of the total energy input, of which the yield loss of the electrolyzer was the highest, which accounted for 93.39% of the total yield loss of the system.
    Conclusions Through this parameter optimisation method, a suitable range of operating parameters can be obtained, which can provide a reference for the selection of offshore wind power hydrogen production parameters.

     

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