The chemically recuperated gas turbine (CRGT) represents a novel

high-efficiency

and low-carbon power generation system

where appropriate design parameters are conducive to enhancing the cycle performance. This study models a CRGT cycle based on steam methane reforming

and employs energy and exergy analyses to elucidate the pivotal influence of key parameters on the cycle’s performance. Moreover

a comparative analysis is conducted with the steam injected gas turbine (STIG) cycle to highlight the distinctions. The results indicate that within a range of combustor outlet temperatures of 1 100~1 500℃ and pressure ratios of 10~30

the CRGT cycle exhibits a power generation efficiency approximately 0.20~1.21 percentage points higher than the STIG cycle

peaking at 51.84%. At a fixed combustor outlet temperature

the CRGT cycle shows marked superiority over the STIG cycle under low pressure ratio conditions. Importantly

the efficiency gains intensify substantially with higher combustor outlet temperatures. Compared with the STIG cycle

the cooling air flow ratio of the CRGT cycle is reduced by 0.5%~21.4%. Furthermore

the steam production of the CRGT cycle is lower than that of the STIG cycle

since more waste heat is converted into chemical energy within the fuel. The heat recovery steam reformer in the CRGT cycle can recover 65%~70% of exhaust exergy

which mitigates exhaust gas exergy losses

accounting for the fundamental reason for the enhanced cycle efficiency. Additionally

for every 10℃ increase in the equilibrium temperature interval of the chemical recuperation reaction

the cycle efficiency declines by roughly 0.02~0.13 percentage points. Therefore

it is critical to achieve efficient steam methane reforming reactions in the chemical recuperation reactor.