**5. Energy and exergy analysis of reverse Brayton refrigerator for gas turbine power boosting**

The use of reverse Brayton cycle to boost up the power of gas turbine power plants operating in hot humid ambiance is discussed in this chapter. The effects of irreversibilities in the system components (air compressor, combustion chamber, turbine, air cooler, expander and the mixing chamber) are evaluated along with the exergetic power gain ratio and the exergetic thermal efficiency change of the cycle. The dependency of the power gain, thermal efficiency and exergetic efficiency on the operation parameters are presented and analyzed.
