Steam Condensor

8/7/2019 Steam Condensor

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Madanjit r. tiwariEn. No.-086450319515


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The Rankine cycle is the standard forsteam power plants that are builtaround the world. The basic Rankinecycleconsists of four main

components:- Steam Generator

Turbine

Steam Condenser

Pump


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Aheat-transfer device used for condensingsteam to water by removal of the latent heat ofsteam and its subsequent absorption in a heat-

receiving fluid, usually water, but on occasionair or a process fluid.

condensers areheat exchangers whichconvertsteam from its gaseous to its liquid state at a

pressure below atmospheric pressure.


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In thermal power plants, the primary purpose ofa surfacecondenser is to condense theexhauststeam from a steam turbine to obtain maximum

efficiency and also to convert the turbineexhaust steam into pure water (referred to assteam condensate) so that it may be reused inthe steam generator or boiler as boiler feed

water.


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Theefficiency of the plant increases .

Power generation cost decreased due toreducing turbine back pressure.

Because ofcondenser temperature of feedwater is maintained so high generation rate ismaintained.

condenser decreases the necessity of newworking medium in cycle. So power generationcost is decreased.


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Direct condenser-Direct contact condenserscondense the turbineexhaust steam by mixingit directly withcooling water

Surfacecondenser- Theexhaust steam from theturbine flows on the shellside of thecondenser.Thecondensed steam from the turbine iscollected in the bottom of thecondenser,


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A direct-contact condenser intimately mixessteam and cooling water. In a barometric-typedirect-contact condenser, theequipment must beelevated highenough to drain by gravity. Alow-level barometric is drained bycondenser pumpsor other mechanical means.

Direct-contact condensers offer lower first cost,lower cooling requirements, low maintenance,

and can be used to scrub the fluid that is beingcondensed. However, they use a great volume ofwater, which must be discharged or treated.


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An indirect-contact surfacecondenser relies onmetal tubes or plates to prevent the mixing ofsteam and cooling media. In a vapor-in-shell

(water-cooled) surfacecondenser, water flowsthrough tubes, condensing steam, which is inthe shell of thecondenser, outside the tubes.

Surfacecondensers do not contaminatecooling

water and allow for recovery ofcondensate.


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Steam Condensor

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