作　　者： ; ;

机构地区： 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室

出　　处： 《化工学报》 2010年第12期3142-3148,共7页

摘　　要： 为提高液化天然气(LNG)冷能的利用效率和CO2近零排放动力循环的发电效率、降低CO2减排的能耗,在对CO2近零排放动力循环利用LNG冷能进行火用分析的基础上,提出了一个以天然气为介质的Rankine循环与CO2近零排放动力循环进行集成的动力系统模型,可以在保持CO2预冷和液化所需冷能不变的情况下,将深冷部分的LNG冷火用转换为电能。研究结果表明,集成后动力系统中LNG冷火用的利用效率从34.9%提高到55.7%,整个动力循环的火用效率可达到57.9%。同时,对影响以天然气为介质的Rankine循环发电效率的参数进行了分析。 For improving cold energy utilization of liquefied natural gas（LNG） and power generation of CO2 near-zero emission power cycle and reducing energy consumption of CO2 emission reduction,the exergy analysis of LNG cold energy utilization in CO2 near-zero emission power cycle was performed.A natural gas Rankine cycle with integrated CO2 near-zero emission power cycle was proposed.While maintaining the necessary supply of cold energy in pre-cooling and liquefaction of CO2,the deep cryogenic exergy of LNG in CO2 near-zero emission power cycle was converted to power by the natural gas Rankine cycle.The results showed that with the integration of the two above-mentioned power cycles,the exergy efficiency of LNG cold energy utilization could be increased from 34.9% to 55.7%,and the exergy efficiency of the entire integrated power cycle reached 57.9%.Meanwhile,the influences of some parameters of the natural gas Rankine cycle on power generation efficiency were analyzed.

关 键 词： 液化天然气 冷能利用 捕集 集成 火用分析

领　　域： [化学工程] [一般工业技术]