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23 Cards in this Set
- Front
- Back
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Steam-water cyle |
A cycle where heat energy converted to steam energy then mechanical energy |
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1. Boiler 2. Turbine 3. Condenser 4. Boiler feed pump |
Major equipments of steam cycle |
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Boiler |
Where is the steam-water cycle start? |
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Condenser |
Where is the lowest point of pressure in the steam-water cycle? |
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Boiler |
An heat exchanger used to gradually raise the water temperature until it becomes superheated steam |
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Economizer |
First step in water temperature ladder. Used to heat feedwater entering the boiler. |
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Steam drum |
After leaving the economizer the water enters ______? The water and steam leaves through the top of this drum. This is where the steam separator and steam dryer are located. |
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Downcomer tubes |
Located outside or near the outside of the boiler as it is desirable to pickup much heat. |
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Drum manifold |
Acts as a distribute points rather than a place for solids to collect |
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Natural circulation |
Circulation is created when one side of this circuit is heated |
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Controlled circulation |
A circulation where the water in the downcomers is forced through the water walls of the boiler. It has boiler water circulating pump in the downcomer. |
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Water wall tubes |
The second step in water temperature ladder. It is the primary steam generator and the heat transfer here is by radiation. |
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Primary superheater |
The first step in the ladder of superheating. Located near the end of the flue gas path just before the economizer. It is in the conduction zone. |
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Headers |
It is a collection & distributing place. It's like a drum. |
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Conduction zone |
The area in the flue gas path that is out of the direct rays of fire. |
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Secondary superheater |
The second step in the ladder of steam. This superheater heats steam to final temperature before sending it to the turbine. |
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Pendant superheaters |
Used in most modern boilers. It is hung from the roof of the boiler down into the furnace. |
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Pendant platen superheaters |
A pendat superheater that has tubes arranged side to side to form a wall. The individual tube bundles are called platens. |
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Radiant superheater |
It is hung out in the primary furnace exposed to the fire, and forms part of the furnace wall. |
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Reheater |
This is where the steam that partially used by the turbine is sent back to the boiler and reheated. |
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Cold reheat line |
Line from the turbine going to the boiler for reheating. |
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Hot reheat line |
Line from the boiler going to the turbine after reheating. |
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Once through boiler |
A boiler with a long continuous tube with heat added all along the tube length. No boiler drum. |
