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Effects of syngas type on the operation and performance of a gas turbine in integrated gasification combined cycle

机译：综合气化联合循环中合成气类型对燃气轮机运行和性能的影响

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摘要

We investigated the effects of firing syngas in a gas turbine designed for natural gas. Four different syngases were evaluated as fuels for a gas turbine in the integrated gasification combined cycle (IGCC). A full off-design analysis of the gas turbine was performed. Without any restrictions on gas turbine operation, as the heating value of the syngas decreases, a greater net system power output and efficiency is possible due to the increased turbine mass flow. However, the gas turbine is more vulnerable to compressor surge and the blade metal becomes more overheated. These two problems can be mitigated by reductions in two parameters: the firing temperature and the nitrogen flow to the combustor. With the restrictions on surge margin and metal temperature, the net system performance decreases compared to the cases without restrictions, especially in the surge margin control range. The net power outputs of all syngas cases converge to a similar level as the degree of integration approaches zero. The difference in net power output between unrestricted and restricted operation increases as the fuel heating value decreases. The optimal integration degree, which shows the greatest net system power output and efficiency, increases with decreasing syngas heating value.
机译：我们研究了在为天然气设计的燃气轮机中燃烧合成气的效果。在集成气化联合循环（IGCC）中，评估了四种不同的合成气作为燃气轮机的燃料。对燃气轮机进行了完整的非设计分析。在燃气轮机运行方面没有任何限制，随着合成气发热量的降低，由于增加的涡轮机质量流量，可能会产生更大的净系统功率输出和效率。但是，燃气轮机更容易受到压缩机喘振的影响，叶片金属变得更加过热。这两个问题可以通过减少两个参数来缓解：燃烧温度和流向燃烧室的氮气。受浪涌裕度和金属温度的限制，与无限制的情况相比，净系统性能下降，特别是在浪涌裕度控制范围内。当集成度接近零时，所有合成气案例的净功率输出收敛到相似的水平。随着燃料发热量的降低，无限制运行和受限运行之间的净输出功率之差会增加。最佳集成度（表示最大的净系统功率输出和效率）随着合成气发热量的降低而增加。

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