化工学报 ›› 2010, Vol. 61 ›› Issue (12): 3142-3148.
熊永强,华贲
XIONG Yongqiang,HUA Ben
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冷转换为电能。研究结果表明，集成后动力系统中LNG冷的利用效率从34.9%提高到
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Abstract:
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.
Key words:
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