Theres a lot of high temp exhaust with Turbines . They are ALL Carnot Cycle and the efficiency is a result of high Combustion Temps and PRESSURES. I've NEVER seen any what you would call HIGH pressures in an aircraft jet engine and you only get IT at near PEAK REVS. Highest I've seen is an EPR of about 2.3. That's AXIAL flow . Multiple Stage, centrifugal ones could go higher but I know of NO examples. Turbines operated at Low Power and altitude have abysmal efficiency and non fan Turbines are a thing of the Past, in aircraft. Also like Many Turbo chargers they can quickly ruin your Hearing. Some LARGE Jet Aircraft engines HAVE been used in the ME to generate electricity but they sit on Lakes of OIL. They can be fired up and at full Power within Minutes. Pistons still remain the Most efficient Dinasaur derived Power Plant but their reliability Borders on Unacceptable some times.. Nev