一种梯级利用LNG冷能的CO_(2)载冷系统
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摘要:摘要提出了一种采用多级冷能回收流程的载冷系统,可实现LNG气化冷能的梯级利用。该系统以CO2作为载冷剂,将LNG的冷能导出并输送至各用冷点如大中型规模的速冻、冻干、冷库、制冰等项目,在替代很多传统压缩式制冷系统运行的同时,可节省压缩制冷电力消耗,间接降低温室气..
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摘要提出了一种采用多级冷能回收流程的载冷系统,可实现LNG气化冷能的梯级利用。该系统以CO2作为载冷剂,将LNG的冷能导出并输送至各用冷点如大中型规模的速冻、冻干、冷库、制冰等项目,在替代很多传统压缩式制冷系统运行的同时,可节省压缩制冷电力消耗,间接降低温室气体排放与海水冷污染,经济效益和社会效益十分可观。该系统通过前级冷能回收流程额外回收一部分冷能用于冷却后级载冷剂并调控该冷能量的方式实现上下游用冷点用冷量波动时互不影响。采用两级冷能回收CO2载冷系统,使一用冷项目的压缩制冷电力消耗节省95%以上,LNG冷能利用效率由单级回收的65%提高到85.5%。A CO2 cold carrying system with multistage cold energy recovery process is proposed,which can realize the cascade utilization of LNG cold energy,and realize that the fluctuation of the cold requiring capacity of the former spot does not affect the latter cold requiring spot.Using CO2 as the refrigerating medium,the cold energy of LNG is exported and transported to various cold requiring spots,such as large and medium-sized quick-freezing,freeze-drying,cold storage,ice making and other projects.While replacing many traditional compression refrigeration systems,it can save more than 95%of the power consumption of compression refrigeration,and indirectly reduce greenhouse gas emissions,which brings considerable economic and social benefits.In this study,the cold energy recovery efficiency increases from 33%of the single-stage recovery to 39%by the cascade utilization of LNG cold energy. 出处《节能与环保》 2023年第8期41-45,共5页 |
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