IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X, Volume 7, Issue 6 (Jul. - Aug. 2013), PP 33-36 www.iosrjournals.org www.iosrjournals.org 33 | Page Enhancement of Specific Power Output of a Gas Turbine Using Filtered Chilled Air S. Suneetha and A. V. Satyanarayana Dept., of Mechanical Engineering G. Pulla Reddy Engineering College. Kurnool-518007 Abstract: Conventionally the specific power output of the gas turbine can be increased using reheating and intercooling. The thermal efficiency can be improved by adding a regenerating at lower pressure ratios. In the present work the emphasis is given to enhance the specific power output by other means like reduction in the air temperature at the inlet duct. The power output of the gas turbine has been estimated by allowing air at reduced temperatures, step wise. The experiment is conducted till STP conditions are attained. The chiller coils are used for inlet air cooling. The variation of power output with respect to temperature is also studied. Keywords: Gas turbine, Inlet air cooling, cooling coil arrangement. I. Introduction Gas Turbine Cycle with Cooling System The gas turbine is an internal combustion engine that uses air as the working fluid. The engine extracts chemical energy from fuel and converts it to mechanical energy using the gaseous energy of the working fluid (air) to drive the engine and propeller, which, in turn, propel the airplane. The basic principle of the airplane turbine engine is identical to any and all engines that extract energy from chemical fuel. In the case of a piston engine, such as the engine in a car or reciprocating airplane engine, the intake, compression, combustion, and exhaust steps occur in the same place (cylinder head) at different times as the piston goes up and down. In the turbine engine, however, these same four steps occur at the same time but in different places. As a result of this fundamental difference, the turbine has engine sections called: 0.The inlet section, 0.1Air filter section, 0.2Cooling system, 0.3the compressor section, 0.4the combustion section (the combustor), 0.5the turbine (and exhaust) section. Figure 1: Gas Turbine Cycle with Cooling System The turbine section of the gas turbine engine has the task of producing usable output shaft power to drive the propeller. In addition, it must also provide power to drive the compressor and all engine accessories. It does this by expanding the high temperature, pressure, and velocity gas and converting the gaseous energy to mechanical energy in the form of shaft power. A large mass of air must be supplied to the turbine in order to produce the necessary power. This mass of air is supplied by the compressor, which draws the air into the engine and squeezes it to provide high-pressure air to the turbine. The compressor does this by converting mechanical energy from the turbine to gaseous energy in the form of pressure and temperature.