The gas turbines are one of the major resources of power generation in the world and its usage is increasing day by day. Although the gas turbines have several advantages over other systems (such as high power to weigh ratio, high rotational speed or fast activation capabilities) but they still waste the energy in the form of high temperature exhaust gases coming out of the gas turbine which pollute the atmosphere and affect the environment. A waste heat recovery system (WHRS) installed at Gas turbine exhaust helps not only to reduce the exhaust temperature of these gases emitting from the uptake into the atmosphere but also enables to produce useful steam for various processes.

The air mass flow rate which enters the compressor has a direct relation with the performance of gas turbine power plant. The volumetric efficiency of the gas turbines decreases with rise in the temperature of the inlet air. The increase in temperature will reduce the density which results in the reduction of gas turbine efficiency. In the present work the steam produced from WHRS has been used in the vapor absorption system of refrigeration. The refrigeration system is utilized to cool the air at the entry of the gas turbine compressor power plant. It was observed in gas turbine power plant that there is a 10% increase in thermal efficiency.