Techno-economic assessment of a commercial natural gas combined cycle with a chemical absorption plant using lean vapor compression modification

IF 6.9 2区 工程技术 Q2 ENERGY & FUELS
Fayez Alruwaili, Kevin J. Hughes, Derek B. Ingham, Lin Ma, Mohamed Pourkashanian
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Abstract

The primary challenge in integrating post-combustion CO2 capture (PCC) with natural gas combined cycle (NGCC) is the significant energy consumption and capital costs. The novelty of this paper lies in proposing for the first time an advanced novel configuration that combines lean vapor compression (LVC) for the PCC plant with the NGCC plant incorporating exhaust gas recirculation (EGR) and selective exhaust gas recirculation (SEGR). The simulation results illustrated that implementing 33 % EGR can increase the CO2 level in exhaust gas from a baseline of 4.2 to 6.3 mol%. In comparison, 53 % SEGR increased the CO2 concentration in the flue gas to 8.8 mol%. Among the different configurations examined, SEGR + LVC achieved the highest energy saving for reboiler duty, which was 14 % compared to the baseline. In contrast, the EGR + LVC recorded the highest enhancement in thermal efficiency by 0.7 % points compared to the reference case. The LVC alone resulted in approximately 0.4 % points improvement in thermal efficiency for all configurations evaluated when the gas turbine loads were reduced from 100 to 60 %. This indicates that LVC is effective under partial loads. Finally, SEGR + LVC results in the greatest cost reduction for the PCC plant equipment, lowering the cost by 26 % compared to the baseline. However, the SEGR has the highest total plant cost and total overnight cost due to additional costs for the CO2 membrane separation system.
工业天然气联合循环与化学吸收装置贫蒸汽压缩改造技术经济评价
将燃烧后二氧化碳捕集(PCC)与天然气联合循环(NGCC)相结合的主要挑战是巨大的能源消耗和资本成本。本文的新颖之处在于首次提出了一种先进的新配置,该配置将PCC装置的稀薄蒸汽压缩(LVC)与NGCC装置结合废气再循环(EGR)和选择性废气再循环(SEGR)。仿真结果表明,实施33%的EGR可以将废气中的CO2浓度从4.2 mol%的基线提高到6.3 mol%。相比之下,53%的SEGR将烟气中的CO2浓度提高到8.8 mol%。在测试的不同配置中,SEGR + LVC实现了再沸器工作的最高节能,与基线相比节省了14%。相比之下,EGR + LVC的热效率比参考案例提高了0.7个百分点。当燃气轮机负荷从100%降低到60%时,LVC单独导致所有配置的热效率提高了大约0.4%。这表明LVC在部分载荷下是有效的。最后,SEGR + LVC可以最大限度地降低PCC工厂设备的成本,与基线相比降低了26%的成本。然而,由于二氧化碳膜分离系统的额外成本,SEGR的总工厂成本和总过夜成本最高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Applied Thermal Engineering
Applied Thermal Engineering 工程技术-工程:机械
CiteScore
11.30
自引率
15.60%
发文量
1474
审稿时长
57 days
期刊介绍: Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.
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