考虑传播效应的2-氨基-2-甲基-1-丙醇/哌嗪燃烧后捕集天然气联合循环电厂最佳运行条件探索

IF 4.6 3区 工程技术 Q2 ENERGY & FUELS
Hirotaka Isogai, Takao Nakagaki
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引用次数: 0

摘要

将燃烧后二氧化碳捕集(PCC)技术整合到火力发电厂中可以减少二氧化碳排放,但会导致净热效率显著下降。优化PCC的操作条件,如液体流量与气体流量的比(L/G)和汽提塔底部温度,可以减少净效率损失。然而,以往的研究部分忽略了操作条件改变对工艺性能的传播效应,如L/G的改变和由此产生的流体速度变化对富贫溶液换热器的换热和压降的影响。本研究模拟了将胺基PCC集成到天然气联合循环中,综合考虑传播效应,探索了最佳操作条件。净效率损失被最小化到6.02%。汽提塔底温为130℃,L/G为0.82。同时,忽略L/G变化的传播效应会导致效率损失的低估和最佳运行条件的错误确定。本文提出的系统评价方法有助于正确优化PCC操作条件,并可广泛应用于采用新型胺溶液或工艺修改的胺基PCC研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Exploration of optimal operating conditions for a natural gas combined-cycle power plant integrated with post-combustion CO2 capture using 2-amino-2-methyl-1-propanol/piperazine considering the propagation effect

Integrating post-combustion CO2 capture (PCC) into thermal power plants can reduce CO2 emissions but results in a significant decrease in net thermal efficiency. Optimizing PCC operating conditions, such as the ratio of the liquid flow rate to the gas flow rate (L/G) and stripper bottom temperature, reduces the net efficiency penalty. However, previous studies partially neglected the propagation effects of altered operating conditions on process performance, such as the effect of altered L/G and resultant change in fluid velocity on the heat transfer and pressure drop in the rich and lean solution heat exchanger. This study simulated amine-based PCC integrated into a natural gas combined cycle and explored optimal operating conditions comprehensively considering the propagation effects. The net efficiency penalty was minimized to 6.02%-pts. at a stripper bottom temperature of 130 °C and L/G of 0.82 for PCC operation with CO2 compression. Meanwhile, neglecting propagation effects of altered L/G led to underestimation of the efficiency penalty and erroneous determination of optimal operating conditions. The system evaluation methods suggested in this paper contribute to correctly optimizing PCC operating conditions and can be broadly applied to amine-based PCC studies employing novel amine solutions or process modifications.

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来源期刊
CiteScore
9.20
自引率
10.30%
发文量
199
审稿时长
4.8 months
期刊介绍: The International Journal of Greenhouse Gas Control is a peer reviewed journal focusing on scientific and engineering developments in greenhouse gas control through capture and storage at large stationary emitters in the power sector and in other major resource, manufacturing and production industries. The Journal covers all greenhouse gas emissions within the power and industrial sectors, and comprises both technical and non-technical related literature in one volume. Original research, review and comments papers are included.
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