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首页> 外文会议>ASME(American Society of Mechanical Engineers) International Mechanical Engineering Congress: Advanced Energy Systems Division; 20031115-20031121; Washington,DC; US >CONFIGURATION ANALYSIS OF A NOVEL ZERO CO_2 EMISSION CYCLE WITH LNG CRYOGENIC EXERGY UTILIZATION
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CONFIGURATION ANALYSIS OF A NOVEL ZERO CO_2 EMISSION CYCLE WITH LNG CRYOGENIC EXERGY UTILIZATION

机译：利用液化天然气进行低温利用的新型零二氧化碳排放循环的构型分析

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摘要

A novel liquefied natural gas (LNG) fueled power plant is proposed, which has virtually zero CO_2 and other emissions and a high efficiency. Natural gas is fired in highly enriched oxygen and recycled CO_2 flue gas. The plant operates in a quasi-combined cycle mode with a supercritical CO_2 Rankine-like cycle and a CO_2 Brayton cycle, interconnected by the heat transfer process in the recuperation system. By coupling with the LNG evaporation system as the cycle cold sink, the cycle condensation process can be achieved at a temperature much lower than ambient, and high-pressure liquid CO_2 ready for disposal can be withdrawn from the cycle without consuming additional power. The net thermal and exergy efficiencies of a base-case cycle are found to be over 65% and 50% respectively, which can be increased up to 68% and 54% when reheat is used. Cycle variants incorporating reheat, intercooling, and reheat+intercooling, as well as no use of LNG coldness, are also defined and analyzed for comparison. The approximate heat transfer area needed for the different cycle variants is also computed. Besides electricity and condensed CO_2, the byproducts of the plant are H_2O, liquid N_2 and Ar.
机译：提出了一种新型的液化天然气（LNG）燃料发电厂，该发电厂的CO_2和其他排放量几乎为零，并且效率很高。用高浓度氧气和循环的CO_2烟气燃烧天然气。该设备以准组合循环模式运行，具有超临界CO_2类兰金循环和CO_2布雷顿循环，并通过换热系统中的传热过程相互连接。通过与作为循环冷阱的LNG蒸发系统耦合，可以在比环境温度低得多的温度下实现循环冷凝过程，并且可以在不消耗额外功率的情况下从循环中取出准备处理的高压液体CO_2。发现基本案例循环的净热效率和火用效率分别超过65％和50％，使用再热时可以提高到68％和54％。还定义并分析了结合了再热，中间冷却和再热+中间冷却以及不使用液化天然气冷度的循环变量，并进行了比较分析。还计算了不同循环变量所需的近似传热面积。除了电力和冷凝的CO_2外，工厂的副产品还有H_2O，液态N_2和Ar。

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