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On a novel carbon-negative IGCC system with cascade CO_2 combined cycle

机译：在具有Cascade Co_2组合循环的新型碳负IGCC系统上

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摘要

A novel carbon-negative integrated gasification combined cycle (NIGCC) is proposed. The chemical looping air separation technology, the supercritical CO2 Brayton cycle and an improved transcritical CO2 Rankine cycle are employed for efficient bio-power generation. The NIGCC system is then systematically modeled, with all the subunit models elaborated and validated against the reported data in literature. Thereafter, the effects of different key operation parameters on the system essential performance indicators are studied in terms of thermodynamics and economics. The exergy analyses for the NIGCC system are also implemented and the corresponding exergy Grassmann diagram are drawn. The net electric efficiency, CO2 emission rate and the levelized cost of electricity of the NIGCC system can reach 51%, -0.6 kg/kWh and 0.63$/kWh, respectively. The exergy efficiencies of the gasifier and gas turbine can be potentially improved so that the NIGCC performance can be further promoted.
机译：提出了一种新型碳负综合气化联合循环（NIGCC）。化学循环空气分离技术，超临界CO2 Brayton循环和改进的跨临界CO2 rankine循环用于有效的生物发电。然后系统地建模了NIGCC系统，所有子单元模型都详细阐述并验证了文献中报告的数据。此后，在热力学和经济学方面研究了不同关键操作参数对系统基本性能指标的影响。还实施了NIGCC系统的Deerteny分析，并绘制了相应的Deertgy Grassmann图。 NIGCC系统的净电效率，二氧化碳排放率和电力调平成本分别达到51％，-0.6千克/千瓦及0.63美元/千瓦时。可以潜在地改善气化器和燃气轮机的电渗效率，从而可以进一步提高NIGCC性能。

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