Abstract The Allam cycle is one of the most promising oxy-combustion systems and has attracted much attention from the energy industry. A novel layout of the Allam cycle, which combines a reheating configuration with the original Allam cycle, was proposed in the present study. The effects of key variables on the net cycle efficiency and net specific work of the new system were investigated. The Allam cycle with reheat was optimized to maximize the cycle efficiency and compared with other cycles. The results showed that the minimum cycle temperature and the outlet temperature of the second combustor have significant effects on the cycle performance, while the maximum cycle pressure has minimum effect on the cycle performance. The highest exergy destruction of the optimized cycle is contributed from the two combustors, which accounts for 25.42% of the total input exergy. The net efficiency of the optimized Allam cycle with reheat is up to 49.32%, a little higher than those of other oxy-combustion cycles and about 5 percentage points lower than that of the original Allam cycle. However, the net power output and net specific work are up to 904.6 MWe and 606.2 kJ/kg for this novel system, about 2.1 times and 2.2 times of those of the original Allam cycle, respectively.

中文翻译：

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具有再加热配置的阿拉姆循环的热力学分析和优化

摘要 阿拉姆循环是最有前景的富氧燃烧系统之一，受到能源行业的广泛关注。本研究提出了一种新的 Allam 循环布局，它结合了再加热配置和原始的 Allam 循环。研究了关键变量对新系统的净循环效率和净特定功的影响。再加热的阿拉姆循环进行了优化，以最大限度地提高循环效率，并与其他循环进行比较。结果表明，最小循环温度和第二燃烧室出口温度对循环性能影响显着，而最大循环压力对循环性能影响最小。优化循环的最高火用破坏来自两个燃烧器，占 25 个。总输入火用的 42%。优化后的再热阿拉姆循环的净效率高达49.32%，略高于其他全氧燃烧循环，比原阿拉姆循环低约5个百分点。然而，该新型系统的净功率输出和净比功高达 904.6 MWe 和 606.2 kJ/kg，分别约为原始阿拉姆循环的 2.1 倍和 2.2 倍。