摘要
采用Aspen Plus软件建立固体氧化物电解池(SOEC)电解水制氢的热力学平衡模型,定量分析了给水预热温度和一次能源发电效率对系统制氢效率的影响,并重点研究了基于不同一次能源类型的制氢系统的效率及特点。结果表明:随着给水预热温度和一次能源发电效率的升高,系统制氢效率均显著提高;与给水预热温度相比,一次能源发电效率对系统制氢效率的影响更为显著。当电流密度在0.4~1.2 A/cm2之间时,基于不同一次能量类型的制氢系统的效率排序为:水电>核电>火电>风电>光热>光伏。基于火力发电的制氢系统效率在31.2%~36.03%之间,但面临着碳排放问题;基于水电的制氢系统效率可达58.02%,但存在明显的地域性,发展应用受限;基于风电、光伏、光热发电的制氢系统效率较低,但资源分布广泛,具有广阔的应用前景;基于核能发电的制氢系统效率较高,最高可达41.33%,同时不产生碳排放,对环境污染小,具有良好的推广前景。
A thermodynamic equilibrium model for hydrogen production by solid oxide electrolysis cell(SOEC)is established using Aspen Plus.The effect of water preheating temperature and power generation efficiency on hydrogen production efficiency are quantitatively analyzed.The efficiency and characteristics of hydrogen production systems based on different primary energy types are emphasized.The results indicate that the system efficiency significantly improves with an increase in water preheating temperature and power generation efficiency.Compared with water preheating temperature,the power generation efficiency shows greater impact.When the current density is 0.4-1.2 A/cm^2,the efficiency of hydrogen production systems based on different primary energy follows the order below:hydropower>nuclear power>thermal power>wind power>photo thermal>photovoltaics.The efficiency of thermal power based system is 31.2%~36.03%,but carbon emission remains a crucial problem.The hydropower based system characterizes a high efficiency of 58.02%,but is regional which limits its development and wide application.Hydrogen production from wind power,photovoltaic,and solar thermal power is promising due to its wide distribution,even though with lower efficiency.The nuclear power based system can achieve an efficiency up to 41.33%without carbon emission,and has good promotion prospect.
作者
杨勤
刘建国
张晨佳
张玉魁
YANG Qin;LIU Jian-guo;ZHANG Chen-jia;ZHANG Yu-kui(China Energy Corporation Group Co.,Ltd.,Beijing 100011,China)
出处
《电力电子技术》
CSCD
北大核心
2020年第12期28-31,36,共5页
Power Electronics
基金
北京市科技计划(Z191100004619009)。
关键词
制氢
固体氧化物
效率
hydrogen production
solid oxide
efficiency
