how does a cooling tower work in power plant
These large towers recover the warmed water which then continues to be circulated where chemistry is permitting. Cooling towers may either use the evaporation of water to remove process heat and cool the working fluid to near the wet-bulb air temperature or in the case of closed circuit dry cooling towers rely solely on air to.
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Air enters the lower portion of the tower and contacts the water in a counter-current manner to help maximize heat transfer.
. The cooling towers work on the principle of evaporative cooling. The air when comes in the contact with the hot water It takes the latent heat of the water and makes it cool. Cooling towers work on the principle of psychometric properties of air.
Cooling towers are a special type of heat exchanger that allows water and air to come in contact with each other to lower the temperature of the hot water. Large cooling towers like those at nuclear power plants rely on a natural draft or flow of air through the cooling tower. Most cooling towers use an electrical fan motor to create an air draft or airflow through the cooling tower.
This type of cooling tower is called an Induced or Force Draft cooling tower. A part of the cooling water evaporates taking in Latent Heat from the water reducing its temeprature. How Cooling Towers Work.
A cooling tower is designed to remove heat from a building or facility by spraying water down through the tower to exchange heat into the inside of the building. Heat transfer related to changes in physical state. Water is pumped from the lake into the cooling tower basin.
The warmed water about 40C is pumped into the tower and sprayed out of a set of sprinklers onto a large volume of plastic packing where it is cooled by the air naturally drawn. The cooled water collects in a sump for return to the heat exchangers. The water is then sprayed through the hollow core of the cooling tower onto a grid in the center of the tower.
How does a cooling tower work. A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature. Air comes in from the sides of the tower and passes through the falling water.
Heat transfer related to changes in water temperature. The cooling tower is widely used in power generation plants. A properly sized Cooling tower can cool the incoming water to temperatures up to 3 C more than the ambient wet bulb temperature.
This is typically in the form of hot water that remains after the steam energy has been used to rotate the steam turbines and then condensed back to liquid state. In a cooling tower heat is transferred via sensible heat and latent heat. All power plants create heat as a byproduct of generating electricity.
With cooling towers most of the heat is transferred to the atmosphere through recirculating cooling water. This water then circulates through the plants condenser tubes absorbs heat from the steam and travels back to the cooling tower. To do this they have cooling towers of which at Drax there are 12.
Also after taking the heat from the hot water the temperature of the air increases and it makes some of the water evaporate and it further cools the water to lower temperature. Wet cooling towers or evaporative cooling towers operate on the principle of evaporative cooling. However this is only effective on certain very large cooling towers.
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