化工学报2025，Vol.76Issue(4)：1731-1741,封3,12.DOI:10.11949/0438-1157.20241053
基于液氖液氮梯级蓄冷的液氢储能中冷能回收利用研究
Research on cascade recovery and utilization of cold energy in liquid hydrogen energy storage based on liquid neon-liquid nitrogen
摘要
Abstract
To solve the problem of spatiotemporal mismatch of energy in liquid hydrogen energy storage and to preferentially match suitable application scenarios,the cold energy is recovered by the combined cascade storage of liquid neon,liquid nitrogen,carbon dioxide(CO2),and other working substances,and then the pre-cooled bypass hydrogen is incorporated into the liquefier to compensate the cold capacity and reduce the power consumption.Aspen HYSYS software is used to establish the processes of cold storage,cold release,and cold energy compensation.While giving priority to recovering cold energy in the low temperature zone,optimization is carried out from aspects such as coupling the waste heat utilization cycle of transcritical CO2 fuel cells.The results showed that the non-pressurized cold energy storage was better to directly compensate the liquefier,and the hydrogen outlet temperature reached 273.7 K,while exergy efficiency was 81.65%.After pressurization,it focused more on increasing output work,and expanders generated more cold energy at high-temperature zones.For example,under the condition of expansion at 130 K,the hydrogen outlet temperature was 299 K,while energy efficiency was 86.07%and exergy efficiency was 50.86%.The simulation of hydrogen liquefaction cycles of helium two-stage expansion Brayton cycle and hydrogen dual-pressure Claude cycle showed that compensating cold capacity could effectively reduce the energy consumption and increase the exergy efficiency.关键词
氢/液化/冷能回收利用/相变/二氧化碳Key words
hydrogen/liquefaction/cold energy recovery and utilization/phase change/carbon dioxide分类
能源与动力引用本文复制引用
张赵雪,李正宇,崔文慧,王倩,王志平,龚领会..基于液氖液氮梯级蓄冷的液氢储能中冷能回收利用研究[J].化工学报,2025,76(4):1731-1741,封3,12.基金项目
国家重点研发计划项目(2022YFB4002801) （2022YFB4002801）
