We have seen that with reheating in Brayton Cycle, the net work output of the cycle increases. Due to metallurgical conditions the maximum temperature in the cycle is fixed, so the perfect reheating will be if we reheat the exhaust from the first stage turbine again to the maximum possible temperature. In the case of perfect reheating the conditions for the maximum work output is discussed in this lesson.
To minimize the compressor work, intercooling is used between the different stages of compressor. In intercooler, a heat exchanger, the compressed working fluid after the compression in the fist stage is cooled, which helps in decreasing the volume and the temperature of the working fluid. The working fluid is again compressed in the second stage of the compressor. Intercooling in the Brayton Cycle decrease the compression work but at the same time it increases the heat supply and the scope of regeneration in the cycle.
Perfect Reheating and Intercooling in gas turbine
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