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eng.gas-turbine-Brayton-cycle Calculator
Calculates gas turbine Brayton cycle thermal efficiency, net work output, and heat rejection from compressor ratio and turbine inlet temperature. Thermal efficiency increases with compression ratio and turbine inlet temperature — modern industrial gas turbines reach 40–42% efficiency.
Inputs
T1 K
Reference formula or conversion factor shown for context.
T3 K
Reference formula or conversion factor shown for context.
Rp
Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
Eta C
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Eta T
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Results
thermal efficiency η_th
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
specific work output W_net (×Cp, K)
Sample size or count used in the calculation.
compressor exit T₂ (K)
Reference formula or conversion factor shown for context.
turbine exit T₄ (K)
Sample size or count used in the calculation.
ideal Brayton η = 1 − r_p^(−(γ−1)/γ)
Sample size or count used in the calculation.
back work ratio BWR
The proportional relationship between two quantities.