固体氧化物电解水制氢系统效率.docVIP

ISSN 100020054 CN 1122223?N 　清华大学学报(自然科学版) J T singhua U niv (Sci Tech) , 2009 年第49 卷第6 期 2009, Vo l. 49, No. 6 20?34 8682871 　 固体氧化物电解水制氢系统效率 刘明义, 　于　波, 　徐景明 (清华大学核能与新能源技术研究院, 北京100084) 收稿日期: 2008204223 基金项目: 教育部博士点专项新教师基金项目(No. 20070003033) 作者简介: 刘明义(1977—) , 男(汉) , 山东, 博士研究生。 通讯联系人: 于波, 助研, E2mail: cassy- yu@mail. tsinghua. edu. cn 摘　要: 电解水与高效清洁一次能源耦合制氢, 是理想的大 规模制氢技术。该文建立了电解水制氢系统效率评估模型, 并通过该模型对碱性、固体聚合物电解池(SPE) 及固体氧化 物电解池(SO EC) 制氢系统总制氢效率进行了计算与分析。 碱性制氢系统电解效率与总制氢效率均较低, 分别为56% 和 25%; SPE 制氢系统电解效率虽有提高约76% , 但其总制 氢效率仍较低约35%; 而SO EC 制氢系统电解效率可达90% 以上, 总制氢效率高达55% , 分别是SPE 与碱性制氢系统的 1. 5 和2 倍。高温气冷堆耦合的SO EC 电解制氢系统是目前 已知总制氢效率最高的大规模制氢系统。 关键词: 氢能; 电解水制氢; 效率分析; 碱性电解池; 固体 聚合物电解池; 固体氧化物电解池 中图分类号: TK 91; TQ 151 文献标识码: A 文章编号: 100020054 (2009) 0620868204 Ef f ic iency of sol id ox ide wa ter electrolys is system for hydrogen product ion L IU Mingyi, YU Bo, XU J ingm ing ( In stitute of Nuclear and New Energy Technology, Tsinghua Un iversity, Be ij ing 100084, China) Abstract: W ater electro lysis coup led w ith an efficient and clean p rimary energy source is an ideal large2scale hydrogen p roduct ion techno logy. A model was developed to p redict the efficiency of a water electro lysis system fo r hydrogen p roduction based on the overall efficiency of an alkaline electro lysis system, a so lid po lymer electro lyte (SPE) system, and a so lid oxide electro lysis cell (SOEC) system. The results show that bo th the electro lysis efficiency, 56% , and the overall efficiency, 25% , are very low. The electro lysis efficiency, 76% , of the SPE system is imp roved, the overall efficiency, 35% , is still low. However, the electro lysis efficiency of the SOEC ismo re than 90% and the overall efficiency is over 55% , bo th are much higher than the o ther system s. The overall efficiency of a h igh2temperature gas2coo led reacto r coup led w ith an SOEC system is the highest among all existing water electro lysis system s. Key words: hydrogen energy; water electro lysis; efficiency analysis