Table of Contents
What is gas turbine and how it works?
A gas turbine is a combustion engine at the heart of a power plant that can convert natural gas or other liquid fuels to mechanical energy. This energy then drives a generator that produces the electrical energy that moves along power lines to homes and businesses.
What is the process of gas turbine?
The basic operation of the gas turbine is a Brayton cycle with air as the working fluid: atmospheric air flows through the compressor that brings it to higher pressure; energy is then added by spraying fuel into the air and igniting it so that the combustion generates a high-temperature flow; this high-temperature …
What is false start in gas turbine?
During the starting sequence of the turbine engine, a false start may occur in which fuel is introduced into the gas turbine engine but the engine does not begin self-sustaining combustion within a predetermined period of time.
How does a gas turbine locomotive work?
A GTEL uses a turbo-electric drivetrain in which a turboshaft engine drives the electric generator or alternator via a system of gears. The electric current is distributed to power the traction motors that drive the locomotive.
How does a gas turbine jet engine work?
All jet engines, which are also called gas turbines, work on the same principle. The engine sucks air in at the front with a fan. As the jets of gas shoot backward, the engine and the aircraft are thrust forward. As the hot air is going to the nozzle, it passes through another group of blades called the turbine.
Why is Gas turbine efficiency so low?
The decrease in the compressor airflow rate results in a decrease in the compressor power absorbed. Similarly, the reduction in the turbine flow also results in a decrease in turbine power. The compressor efficiency decrease is due primarily to the effects of compressor fouling.
How Gas turbine is shut down?
Explanation: The only way to stop a running Gas turbine is by cutting off the fuel supply so that the various processes in the cycle are stopped.
How to troubleshoot gas turbines?
Troubleshooting Gas Turbines 1 The thermodynamic gas path; 2 Turbine vibration and instability; 3 Lubricant and lubrication system condition; 4 Parameters for online condition monitoring; and 5 Scheduled inspection and proactive maintenance activities.
What is the control system of this gas turbine?
The control system of this gas turbine is a digital control system ( Fig. 1 ), named Speedtronic Mark IV system ( Johnson et al., 1983 ), which provides the analog and digital signals required to control and protect the operation of the gas turbine. Fig. 1. Basic block diagram of Speedtronic Mark IV control system.
What are the most common problems with gas turbine bearing?
Bearing problems in gas turbines are related to lubricant quality, contaminants, wear, temperature, and vibration. Gas turbines run at high speed; aero-derivatives run at speeds that range from 9,000 to 20,000 RPM, while heavy industrials operate at speeds in the 3,000 to 12,000 RPM range.
What are the objectives of gas turbine maintenance?
Photo Credit: Getty Images. The objective of gas turbine maintenance is to maximize performance, improve maintainability and reliability, and reduce downtime. The objective can only be achieved by preventing turbine systems deterioration with an effective condition monitoring and maintenance program.