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What do you mean by turbine synchronization?
During a typical power plant startup, all components of the power plant are started slowly. The turbine is first rolled at a slow rpm. Then the rpm is increased gradually to a point where it can match the frequency of the grid. At this point, the turbine can be synchronized with the grid and start outputting electricity into the grid.
What are the procedure for cold start-up of turbine?
The cold start-up procedure for a turbine typically involves several key steps. First, the system is inspected to ensure all components are in good condition and any necessary maintenance is performed. Next, the lubrication system is activated to ensure proper oil circulation before ignition. Finally, the turbine is gradually brought up to operating speed while monitoring parameters such as temperature and pressure to ensure safe and efficient operation.
Why is it necessary to open casing drains and drains on the steam line going to the turbine when a turbine is to be started?
To avoid slugging nozzles and blades inside the turbine with condensate on start-up; this can break these components from impact. The blades were designed to handle steam, not water.
What is a wet start in turbine engines?
Normally when starting a turbine engine, the starter is used to get the turbine up to operational speeds, then fuel is pumped in with the ignition active. A "wet start" is a start where the engine is being started with a quantity of fuel already pooled in the engine (perhaps the result of a previous failed start) or the pilot delays ignition beyond what is normal and allows fuel to pool in the engine before ignition. Wet starts can result in a fire plume or a loud bang, and may damage the engine. The most dramatic damage will be to the compresser turbine blades due to pressure and heat failure.
What is warm rolling of steam turbine?
You don't start a large turbine cold. Typically, the lubrication system is started, the turning gear is engaged and warming steam (a small amount of steam, not enough to turn the turbine) is admitted to the turbine to warm and initially expand the shaft and casing. If this isn't done, thermal shock from the admission of high pressure superheated steam into the cold turbine could damage it.
What is purpose to spray in exhaust hood of steam turbine?
The purpose of exhaust hood spray is to decrease the temperature of steam turbine last stage that is probably LP. This is operate on low load specially at start up and shut down of steam turbine when the temperature at the outer most edge of the turbine blades of that stage is very high and As we know that the steam flow also decrease The temperature of turbine blade.
What is turbine drain valve?
When steam is introduced to a turbine during start up, drain valves are fully open. They drain to the condenser until the turbine reaches a certain load. Once that load is reached, the valves are closed and turbine runs normally.
What are the turbine generator start up rmp for a cold start?
It may be depends on the Constructor/ Design of Turbine .
What steps needs for start a steam turbine from cold conditon?
steam turbine cold start up list:
Why used hogger and ejector in steam turbine?
A steam turbine condenser equipped with ejectors is usually fitted with two ejectors. The larger of the two is called the hogger and the smaller the huffer. Steam turbines are designed for efficiency and thus attempt to extract as much energy from the steam passing thru as is physically possible. Energy is extracted as both temperature and pressure decrease. The lower the temperature and pressure at the steam turbine's exhaust the more energy can be extracted from the steam. For this reason it is desirable for the steam turbine condenser (the exhaust) to be at the lowest temperature and pressure possible. The hogger, or hogging jet, is a large steam powered ejector that causes the steam condenser to operate under a near perfect vacuum whilst the steam turbine is in the start-up phase. In steady state operation the cooling effect of the condenser cooling water of the steam causes the condenser to operate under a nearly self sustained vacuum. The hogger is necessary in the start-up phase to prevent steam from condensing to water in the final stages of the turbine before the steam flow and cooling effect of the condenser can establish vacuum. The huffer or huffing jet runs continuously whilst the turbine is operating to remove any non-condensable gasses (i.e. air) that might leak into the condenser. It is nearly impossible to perfectly seal a condenser and turbine from air-in leakage. It should be noted that modern, large steam turbines do not employ steam ejectors to establish and maintain condenser vacuum. Modern designs utilize motor driven mechanical vacuum pumps.
What do you mean by turbine synchronization?
During a typical power plant startup, all components of the power plant are started slowly. The turbine is first rolled at a slow rpm. Then the rpm is increased gradually to a point where it can match the frequency of the grid. At this point, the turbine can be synchronized with the grid and start outputting electricity into the grid.
What causes white smoke to come from an diesel mondeo exhaust during the first start of the day?
If it is only at the start of the day and disappears shortly after startup, it is just condensation in the exhaust that is burning off. Pretty normal, especially in cold or rainy weather.
What was the temperature during Athens olympic marathon?
Temperature at the start of the MEN'S race was 80° Fahrenheit (26° celsius) with 40% humidity Temperature at the start of the WOMEN'S race was 86° with 50% humidity
What is boiling point in science?
during boiling,the temperature of a mixture is different at different times. during boiling,the temperature of a substance changes at the start then it becomes the same and constant.
What are the procedure for cold start-up of turbine?
The cold start-up procedure for a turbine typically involves several key steps. First, the system is inspected to ensure all components are in good condition and any necessary maintenance is performed. Next, the lubrication system is activated to ensure proper oil circulation before ignition. Finally, the turbine is gradually brought up to operating speed while monitoring parameters such as temperature and pressure to ensure safe and efficient operation.
What is Turbine cold start up?
cold start up of a steam turbine has to be done after a rather long period of shut down - when turbine case and chest temperature are fallen down dramatically. turbine constructor heating ramps mast be followed in order to avoid thermal stresses on the metal of turbine case , valve case and rotor to avoid also height differential expansion between rotor and case that could lead to contact between case and rotor because of the different thermal inertia of the two parts.when the heating is complited the turbine can be started checking closely the differntial expansion recorders.when at speed the unit can be sincronyzed (usually at 3000 rpm) and then loaded according to the related load ramp.(megawatts\ minute)
When does summer start in Chicago?
The average temperature in Chicago during the summer is around 72˚F
