摘要
氢气压缩机和储氢容器的设备成本超过加氢站设备投资的50%,储存压力对两者选型和系统经济性有重要影响。为满足可再生能源制氢系统经济高效储氢的需求,针对构建的系统模型研究不同储氢压力等级对氢储能系统压缩能耗和初始投资的影响,在3和45 MPa两个压力等级之间选定5个储氢压力等级,分别为12、17、20、25、30 MPa,综合分析后采用20 MPa作为中间级储氢压力。同时,氢储能平准化电力成本随储能容量的增大呈快速下降趋势,适用于大规模储能场景。研究发现,氢储能对电价敏感,分析认为与“电—氢—电”系统中电解水制氢工艺耗电量大且系统效率较低有关。
The cost of hydrogen compressor and hydrogen storage vessel exceeds 50%of equipment investment of hydrogen refueling station,and storage pressure has a profound effect on their selection and the economy of this system.In order to study cost-effective hydrogen storage,which can meet the demand of producing hydrogen from renewable electricity system,the impact of different hydrogen storage pressure on the compressed energy consumption and initial investment of hydrogen energy storage system is studied.Five levels of hydrogen storage pressure are selected between 3 and 45 MPa,which are 12,17,20,25 and 30 MPa,respectively.It is found that 20 MPa can be used as the intermediate hydrogen storage pressure after comprehensive analysis.And the levelized cost of hydrogen energy storage shows a rapid downward trend with the increase of hydrogen storage capacity,which means it is suitable for large-scale energy storage scenarios.It is also found that hydrogen energy storage is sensitive to electricity price due to the large power consumption and the lower system efficiency of the water electrolysis process in the"electricity-hydrogen-electricity"system.
作者
牛天钰
蒋焱
NIU Tianyu;JIANG Yan(China Electronics Engineering Design Institute CO.,LTD,Beijing 100142,China)
出处
《洁净煤技术》
CAS
CSCD
北大核心
2024年第S02期613-617,共5页
Clean Coal Technology
关键词
氢储能
大规模储能
储氢压力
平准化电力成本
hydrogen storage
large-scale storage
hydrogen storage pressure
levelized cost of electricity(LCOE)
