It can be shown that the thermal efficiency of a combined gas-steam power plant cc can be expressed in terms of the thermal efficiencies of the gas- and the steamturbine cycles as

Prove that the value of cc is greater than either of hg or s. That is, the combined cycle is more efficient than either of the gas-turbine or steam-turbine cycles alone.

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Mee = 1g + n. - ngns %3!