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中文摘要：
提出一种新型发电系统，通过煤和天然气的互补利用来减少能量转化过程的不可逆损失。煤气化炉采用空气和水蒸气做氧化剂，碳转化率约为60％，未转化部分形成半焦，半焦燃烧释放的热量驱动天然气重整反应，制取合成气。煤部分气化所得气化煤气和半焦燃烧驱动天然气重整所得合成气混合，作为联合循环的燃料。结果显示，新系统的热效率为51．5％，效率为50．3％，天然气折合发电效率为61％。新系统为高效合理利用煤和天然气提供了一种新途径。
英文摘要：
This paper proposes a new power generation system based on the moderate conversion of coal and natural gas. First about 60% of coal is gasified in a gasifier with air and steam as oxidant, then, the unconverted residuals （char） and natural gas are utilized synthetically based on the method of char-fired reforming to generate syngas, in which the combustion of char will drive the methane/steam reforming reaction. The fuel gas from the partial gasification of coal and syngas from char-fired reforming are mixed together and fed into a combined cycle for power generation. As a result, the thermal efficiency, exergy efficiency ,and the net efficiency of NG to electricity of the new system is about 51.5%, 50.3% and 61%, respectively. The results obtained here may provide a new way of using coal and natural gas more efficiently and economically.
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