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1-air leaks in condencer from atmosphere at the joints of the partwhich are internalyy under a pressure less than that of atmoshere .the amount air leaking in mainly deend upon the accurate work man ship and can be reduced to a very small quantity
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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 is the role of gland condenser in steam turbine?
gland condenser is a type of condenser in which steam which is coming from d turbine is used for the heating of demineralised water and then this water is sent to the boiler so boiling of hot water consumes less coal and thus we get benifit of it
How do you make the air condenser work?
An air condenser takes in the surrounding air(at about 45-50 degree Celsius). The vapor at high pressure enters the condenser and accepts the latent heat of condensation from the hot airthereby rejecting heat to condensing coils. The vapor then becomes liquid.
What is ac condenser?
ac condenser means "Air Cooled Condenser". The cooling media is Air. The fluid or anything which is being circulated through (inside) the coils /tube being cooled by the exposed or forced air - which impinges over the outside of the coil / tubes. B.Kannan balakannan@live.com
What is the working principle of steam jet air ejector?
what is the woking principal of steam jet ejector? limitation of steam jet ejetor?
What is the Function of gland box in steam turbine?
Gland is used for the prevent leakage of oil from the gland box which is made up of copper or brass and gland box function is to support the glands which are made up of cast iron.This is called oil gland. steam gland is used for prevent the leakage of steam which exhausts air and which helps build up the vaccum in condenser is called steam gland.
What is the purpose of air ejector?
To remove air and noncondensable gases from a main steam condenser
Why the vacuum is maintained in condenser?
For increasing steam turbine efficiency. if vacuum is not maintained then, uncondensable gases and air in condenser will increase the condenser pressure.
Why the vacuum is maintained in Steam condenser?
It is important to maintain a vacuum in a condenser if you want it to work well.
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.
How does a tumble dryer condenser box work?
steam from the tumble dryer makes contact with the water inside the condenser box instantly turning back to water & releasing the warm air minus steam
What is the role of gland condenser in steam turbine?
gland condenser is a type of condenser in which steam which is coming from d turbine is used for the heating of demineralised water and then this water is sent to the boiler so boiling of hot water consumes less coal and thus we get benifit of it
How air ejector maintains vacuume in condenser in thermal power plant?
It is one of the types of air ejector which is used in the steam like near the condenser to remove the non condensable gases and some vapour entering into main condenser by an air ejector and it is cooled by the main condensate and released in the ejector condenser. A steam is used as the motive fluid to withdraw air and dissolved gases from the condenser by the ejector action. In each stage of the steam jet ejector, high pressure steam is expanded in a convergent /divergent nozzle. The steam leaves the nozzle at a very high velocity in the order of 1220 m/s and a proportion of the kinetic energy in the steam jet transferred by interchange of momentum to the body of air which entrained and passes along with the operating steam through a diffuser in which the kinetic energy of combined steam is re-converted to pressure energy. The maximum pressure ratio that can be obtained with a single stage is roughly 5:1 and consequently it is necessary to use two or even three stages in series to establish a vacuum in the order of 724mm of Hg with reasonable steam consumption.
Causes of corrosion in power plant?
Dissolved Oxygen (DO) and other gases are a major cause of corrosion in the steam cycle. Corrosion leads to forced outages and increased maintenance costs. A common misconception is that high DO is concurrent with high air in-leak; this is not always the case. High DO and condensate ammonia concurrent with low air in-leakage is an indication that the condenser configuration may be inadequate.
What is the function of gland steam in steam turbines?
Gland steam is steam supplied to the labyrinth glands of the low pressure turbine to prevent air entering in the exhaust side, which disturbs the vacuum (± 50 mbar absolute) in the condenser. Gland steam pressure is to supply at about 0,2 bar.
What is the function of the gland steam in steam turbine?
Gland steam is steam supplied to the labyrinth glands of the low pressure turbine to prevent air entering in the exhaust side, which disturbs the vacuum (± 50 mbar absolute) in the condenser. Gland steam pressure is to supply at about 0,2 bar.
What are the symptoms of an cooled Condenser when the air leaving the condenser is hitting a barrier and recirculating?
What are the symptoms of an cooled Condenser when the air leaving the condenser is hitting a barrier and recirculating?
