Abstract Recently, natural gas-fired power generation has attracted more attention as it has lower specific CO2 emissions and higher operational flexibility than coal- and oil-fired power generation. In state-of-the-art gas-fired oxy-combustion cycles, combustion takes place at elevated pressure, which enables high efficiency and competitive economic performance. This review presents a new insight by summarising the main challenges associated with these types of cycles and covers: (i) O2 production methods and purity; (ii) types of exhaust gas recirculation; and (iii) operating pressure. The techno-economic evaluation of the state-of-the-art gas-fired power cycles showed that although the Allam cycle is superior among other cycles with an efficiency of 55.1%, its highly affected levelised cost of electricity by interest rate adds more uncertainty to investment decisions. Importantly, the progress towards the next generation of gas-fired oxy-combustion cycles will require the development of less complex cycles with more efficient and less energy-intensive O2 production.

中文翻译：

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电力的平准化成本各不相同，预计低于 40 英镑/兆瓦时，对接近零二氧化碳排放的燃气发电技术进行技术经济评估：综述

摘要 近年来，天然气发电由于比燃煤和燃油发电具有更低的二氧化碳排放量和更高的运行灵活性而受到越来越多的关注。在最先进的燃气全氧燃烧循环中，燃烧在高压下进行，从而实现高效率和具有竞争力的经济性能。本综述通过总结与这些类型的循环相关的主要挑战提出了新的见解，涵盖：(i) O2 生产方法和纯度；(ii) 废气再循环的类型；(iii) 操作压力。对最先进的燃气动力循环的技术经济评估表明，虽然阿拉姆循环在其他循环中更为优越，效率为 55.1%，其受利率影响的电费平准化成本增加了投资决策的更多不确定性。重要的是，下一代燃气氧燃烧循环的进展将需要开发复杂度较低的循环，从而实现更高效、能耗更低的 O2 生产。