Design of Pre-Cooler for Gas Turbine at Garri (1and2) Power Station by Using Vapor Compression Refrigeration System

Gas-turbine inlet air cooling has been considered for boosting the power output during hot seasons, the gas turbine being a constant volume-flow machine, the power of the gas turbine is directly proportional to the mass flow rate of air passing through it, which is directly proportional to sucked air density. A high ambient temperature reduces the air density. Gas turbines designed to operate at standard conditions of 15°C therefore gas turbine loose a significant portion of their generating capacity when installed in hot climates. Reduce the temperature of inlet air by using chilled water to the design condition increase output power by 8 MW for each turbine in Garri power plant these amount of power equals 25% of the rate power of turbine. This research is the trial to calculate the increase in output power from gas turbine by designing pre cooler system to increase the efficiency and output power of the turbine.