For the following questions answer them individually
During January, at a location in Rohtang, winds at $$-6^\circ C$$ can be observed. Several meters below the ground, the temperature remains at $$27^\circ C$$. A scientist claims to have devised a power cycle exploiting this situation that has a thermal efficiency of 10%. Whether the claim is true?
In an ideal gas turbine cycle with intercooling, reheating and regeneration as the number of compression and expansion states are increased, which of the following statements are correct?
I. The Brayton cycle reduces to Ericsson cycle.
II. The Brayton cycle reduces to Stirling cycle.
III. The cycle efficiency becomes equal to Carnot cycle efficiency.