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The startup sequence of a gas turbine engine, provided that all environmental systems are working (fuel supply, battery power/pneumatic pressure etc.) are available, is basically as follows:
- energize starter
- observe RPM is increasing
- once lightup RPM is reached, energize ignition system
- open start fuel valve or (if no dedicated start fuel system present on particular machine) main fuel valve at minimum flow
- observe increase of exhaust gas temperature (EGT) or whatever combustion-related temperature is displayed on particular machine (TIT, ITT)
- once combustion is established, increase main fuel flow, carefully observing that temperature limits aren't exceeded
- monitor RPM and EGT and modulate fuel flow for smooth acceleration without excessive temperatures
- once self-sustain speed is reached, de-energize ignition system and starter
- continue to monitor RPM and temperature until idle speed is reached
- make sure that at specified RPM, the required minimum oil pressure is present
On modern engines, this procedure is programmed into a sequencer that will take care of everything until idle speed is reached. Any malfunction will cause the startup cycle to be terminated. Usually, engines equipped like this are just started by pushing a switch and observing the instruments.
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoGenerally it refers to a drawing which shows the building and equipment position in a gas turbine power plant.
the designer consider the function of each building and equipment and their requirement and economical condition and prepare this drawing.
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What is difference between radial flow turbine and axial flow turbine?
in a radial flow turbine the steam enters the turbine in the direction of its radius and leaves it in the direction of the axis of the shaft. in a axial flow turbine the steam enters the turbine in the direction of the axis of the shaft and leaves the turbine in the same direction.
What is surge in gas turbine?
Surging in gasturbine means that the pressure at the delivery end of the gas turbine compressor becomes very high (as a result of reduced flow at the compressor outlet). When this happens, the compressor pressure at the delivery end increases as the flow decreases upto an extent after which the pressure does not increase and there is a flow reversal. This flow reversal releases the sudden pressure that developed on account of reduced flow. The flow reversal is accomplanied with a loud noise and tremendous vibration. Surging affects the whole machine and if it is of high magnitude, the gas turbine can be ripped apart. Anti-surge devices (Bleed valves) are installed which do not allow the flow to reduce even on low speeds and keep a certain air flow from the compressor during times of low air requirement (startup and shutdown) Surging in gasturbine means that the pressure at the delivery end of the gas turbine compressor becomes very high (as a result of reduced flow at the compressor outlet). When this happens, the compressor pressure at the delivery end increases as the flow decreases upto an extent after which the pressure does not increase and there is a flow reversal. This flow reversal releases the sudden pressure that developed on account of reduced flow. The flow reversal is accomplanied with a loud noise and tremendous vibration. Surging affects the whole machine and if it is of high magnitude, the gas turbine can be ripped apart. Anti-surge devices (Bleed valves) are installed which do not allow the flow to reduce even on low speeds and keep a certain air flow from the compressor during times of low air requirement (startup and shutdown)
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 the liquid flow meter is working?
The turbine flow meter translates the mechanical action of the turbine rotating in the liquid flow around an axis into a user-readable rate of flow. The turbine tends to have all the flow traveling around it. The turbine wheel is set in the path of a fluid stream. The flowing fluid impinges on the turbine blades, imparting a force to the blade surface and setting the rotor in motion. When a steady rotation speed has been reached, the speed is proportional to fluid velocity. Turbine flow meters are used for the measurement of natural gas and liquid flow
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. )
Diagram of gas turbine?
A diagram of an impulse turbine is in related links.
What is the length of an blade for a gas turbine?
The length of a blade depends on the style (impulse or reaction), the overall size of the turbine, whether it is an axial flow or radial flow turbine, and where the blade is located within turbine of an axial flow turbine. One thing that is constant: the length of the blade increases from the steam or gas inlet to the discharge of the unit. The profile will gradually increase in diameter from inlet to discharge.
What is the Tangential flow in turbine?
When flow of water on turbine is tangential, flow is tangential flow
How you increase load electrically in Gas turbine plants?
By increasing the flow rate of the natural gas being used as the fuel.
What is difference between radial flow turbine and axial flow turbine?
in a radial flow turbine the steam enters the turbine in the direction of its radius and leaves it in the direction of the axis of the shaft. in a axial flow turbine the steam enters the turbine in the direction of the axis of the shaft and leaves the turbine in the same direction.
Gas turbine generator?
gas turbine generator
How gas turbine work?
Gas turbine works with the use of many kinds of fuel to run a compressor. The compressor will bring the atmospheric air flows through its highest pressure and with the addition of fuel into the air it will ignite and then the combustion will generate a high-temperature flow.
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.
What is surge in gas turbine?
Surging in gasturbine means that the pressure at the delivery end of the gas turbine compressor becomes very high (as a result of reduced flow at the compressor outlet). When this happens, the compressor pressure at the delivery end increases as the flow decreases upto an extent after which the pressure does not increase and there is a flow reversal. This flow reversal releases the sudden pressure that developed on account of reduced flow. The flow reversal is accomplanied with a loud noise and tremendous vibration. Surging affects the whole machine and if it is of high magnitude, the gas turbine can be ripped apart. Anti-surge devices (Bleed valves) are installed which do not allow the flow to reduce even on low speeds and keep a certain air flow from the compressor during times of low air requirement (startup and shutdown) Surging in gasturbine means that the pressure at the delivery end of the gas turbine compressor becomes very high (as a result of reduced flow at the compressor outlet). When this happens, the compressor pressure at the delivery end increases as the flow decreases upto an extent after which the pressure does not increase and there is a flow reversal. This flow reversal releases the sudden pressure that developed on account of reduced flow. The flow reversal is accomplanied with a loud noise and tremendous vibration. Surging affects the whole machine and if it is of high magnitude, the gas turbine can be ripped apart. Anti-surge devices (Bleed valves) are installed which do not allow the flow to reduce even on low speeds and keep a certain air flow from the compressor during times of low air requirement (startup and shutdown)
Why velocity of flow will decrease with increase in peripheral speed of francis turbine?
the peripheral velocity of the turbine is the around velocity. the increase in the velocity of the peripheral will decrease the velocity of the flow towards the turbine
When was Gas Turbine Research Establishment created?
Gas Turbine Research Establishment was created in 1959.
Why the gas turbine needs 3 bucket stages only in 110MW TURBINE?
because all gas turbine has three stage buckets
