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In modern Combined Cycle Power Stations, the exhaust gas from Gas Turbines, which contains significant amount of heat energy is diverted to water boilers to generate steam which in turn runs Steam Turbines. Usually Two or Three GT's exhaust gas is used to run a ST.
The significance of this is that, the otherwise wasted exhaust heat is intelligently used to generate power, thereby pushing the efficiency of a single GT of 25-30 % to a combined cycle efficiency of about 45-50 %.
Alternatively in some industries, the exhaust gas can also be used for process heating requirements.
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What is the difference between a pulse system and a constant pressure turbocharger?
Types of turbochargers Turbochargers are of two types and they are pulse and constant pressure type turbocharger. Pulse type turbocharger: In pulse type turbocharger, the exhaust gas directly enters the turbine side and drives the turbine with the exhaust gas energy. The connection from the exhaust side of an engine is directly connected to the turbine side of a turbo charger. The pipe connections from the exhaust gas towards the turbine side are generally small in length and exhaust grouping is provided to prevent the blowback of gases from one cylinder to another. Constant pressure type turbocharger: In constant pressure type turbocharger, the exhaust gases gets collected in a single exhaust gas reservoir, where the pressure is maintained constant so as to avoid any fluctuation in the exhaust gas energy pressure. The exhaust gas is introduced to the turbine side after maintaining the pressure inside the cylinder. Materials: Turbine and compressor blades: Steel or nickel alloy. Volute casing: cast iron Bearings: steel or gun metal.
Why does gas turbine trips on high exhaust tempr spread?
nozzle fouling, restricted cooling, component wear
Open cycle arrangement of a gas turbine?
1. The working gas is compressed in compressor and directed towards the heat exchanger (Air heater), where heat is being added to the compressed gas before it enters the turbine. 2. The heat is supplied by an external source such as a nuclear reactor, or some other heat source. 3. The hot gasses then expend and accelerate through a nozzle which drive the guide vanes of the turbine and then shaft. 4. At last, the remaining exhaust gasses pass through a cooler and directed towards the compressor inlet.
Why the temperature and the pressure of gas are decreasing after flowing out from turbine?
The gas (working fluid) having flown through the turbine does some work on the turbine, converting its thermal energy into mechanical work produced by the turbine and coming out as an expanding gas with lower temperature and pressure.
How do you use the word turbine in a sentence?
My dadd uses turbine to heat the gas of hiss engine after he stopped at the gas stop and didn't find any gas left. ( This may be a weird looking sentence for turbine,but at least I got an A on it. )
What property of the exhaust gas is being used to turn the turbine that runs the compressor?
At exhaust valve opening, pressurised gas reduces pressure by moving across the turbine blades and out of the exhaust pipe, the momentum of the moving gas is tapped by the turbine blades producing torque on the turbine shaft.
What is the difference between a pulse system and a constant pressure turbocharger?
Types of turbochargers Turbochargers are of two types and they are pulse and constant pressure type turbocharger. Pulse type turbocharger: In pulse type turbocharger, the exhaust gas directly enters the turbine side and drives the turbine with the exhaust gas energy. The connection from the exhaust side of an engine is directly connected to the turbine side of a turbo charger. The pipe connections from the exhaust gas towards the turbine side are generally small in length and exhaust grouping is provided to prevent the blowback of gases from one cylinder to another. Constant pressure type turbocharger: In constant pressure type turbocharger, the exhaust gases gets collected in a single exhaust gas reservoir, where the pressure is maintained constant so as to avoid any fluctuation in the exhaust gas energy pressure. The exhaust gas is introduced to the turbine side after maintaining the pressure inside the cylinder. Materials: Turbine and compressor blades: Steel or nickel alloy. Volute casing: cast iron Bearings: steel or gun metal.
What gas is used to turbo the cars?
Turbo chargers are driven by the exhaust gases exiting the engine - engine exhaust drives a turbine in the exhaust system which, in turn, turn the turbo compressor.
Why does gas turbine trips on high exhaust tempr spread?
nozzle fouling, restricted cooling, component wear
Why Gas Turbine Exhaust temperature is above 500 deg C?
The exhaust temperature of gas turbines is very high due to the large amount of energy input into the inlet air by the combustion of fuel in the combustion chamber.
Gas turbine generator?
gas turbine generator
What is pulse turbo charger?
Pulse turbocharger uses pressure pulse wave to expand the gas further at turbine nozzles and blades. Exhaust gases from each cylinder is is directly lead to turbine inlet.
What is open and closed cycle gas turbine?
In an open cycle gas turbine, the gases that are produced by combustion go directly into the atmosphere, though the heat produced can sometimes be reclaimed. In a closed cycle gas turbine, the gases produced are reused and are not emitted into the atmosphere.
What is vaccume breaker in steam turbine?
A vacuum breaker is a check valve installed on the exhaust casing of a turbine. It opens to prevent the collapse of the exhaust hood when the turbine cools and the condensing steam produces a vacuum.
How does the temperature vary across the gas turbine is there a formula for getting the work done in the turbine?
Read up on thermodynamics and then read the link concerning the Brayton Cycle. The temperature peaks just before it reaches the exhaust.
How does a turbo waste gate work?
A waste gate regulates the amount of exhaust gas that spins the internal turbine of a turbocharger based on a predetermined amount of pressure in the system to keep the turbo from continually building boost that is higher than the system can handle. When closed it allows the exhaust to pass over the turbine creating pressure on the cold side of the turbo. With the waste gate open it allows the gas to bypass the turbine stopping pressure buildup.
Why is the gas turbine called as the power plant?
A gas turbine is one type of power plant. It produces power by burning gas to turn the turbine.
