09-10-2014, 12:19 PM
CONDENSER IN POWER PLANT
CONDENSER.doc (Size: 344 KB / Downloads: 81)
Introduction:
Steam Condenser: It is a device or an appliance in which steam condenses and heat released by steam is absorbed by water.
PARALLEL-FIOW TYPE OF JET CONDENSER:
The exhaust steam and cooling water find their entry at the top of the condenser and then flow downwards and condensate and water are finally collected at the bottom.
LOW LEVEL JET CONDENSER (COUNTER-FLOW TYPE JET CONDENSER)
Figure Shows, L, M and N are the perforated trays which break up water into jets. The steam moving upwards comes in contact with water and gets condensed. The condensate and water mixture is sent to the hot well by means of an extraction pump and the air is removed by an air suction pump provided at the top of the condenser.
REGENERATIVE TYPE:
This type is applied to condensers adopting a regenerative method of heating of the condensate. After leaving the tube nest, the condensate is passed through the entering exhaust steam from the steam engine or turbine thus raising the temperature of the condensate, for use as feed water for the boiler.
EVAPORATIVE TYPE:
The principle of this condenser is that when a limited quantity of water is available, its quantity needed to condense the steam can be reduced by causing the circulating water to evaporate under a small partial pressure.
The exhaust steam enters at the top through gilled pipes. The water pump sprays water on the pipes and descending water condenses the steam. The water which is not evaporated falls into the open tank (cooling pond) under the condenser from which it can be drawn by circulating water pump and used over again. The evaporative condenser is placed in open air and finds its application in small size plants.
CONCLUSION
As from this we know all the functions of different types of steam condenser that are used in Thermal Power plant. We know how Jet Condenser works and how a steam condenser works. And also we know different challenges found in a power plant related to condensers. From this we know all about the uses and function of steam condenser in thermal power plant.