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Cooling Towers Data

Cooling towers work by using evaporation to reject waste heat from a water stream and lower its temperature. There are two main types - natural draft towers, which use convection to circulate air, and mechanical draft towers, which use fans. Common applications include cooling water in power plants, refineries, and building HVAC systems. Cooling towers vary significantly in size, from small rooftop units to very large hyperboloid or rectangular structures over 100 meters tall used in power plants.

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72 views8 pages

Cooling Towers Data

Cooling towers work by using evaporation to reject waste heat from a water stream and lower its temperature. There are two main types - natural draft towers, which use convection to circulate air, and mechanical draft towers, which use fans. Common applications include cooling water in power plants, refineries, and building HVAC systems. Cooling towers vary significantly in size, from small rooftop units to very large hyperboloid or rectangular structures over 100 meters tall used in power plants.

Uploaded by

Dhanush Bevara
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Cooling Towers:

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. 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
cool the working fluid to near the dry-bulb air temperature.

Principle:

Cooling tower works basically on the principle of


evaporation. In this process the sensible heat of hot water is
converted to latent heat of vaporisation. Thus reducing the
temperature of the exposed surface area of water to the air

Types of Cooling Tower:

There are two types.

1) Natural draught cooling tower.

2) Mechanical or Forced Draught Cooling Tower: In this


type of cooling tower, fan is used to circulate the air.
Common applications include cooling the circulating water
used in oil refineries, petrochemical and other chemical
plants, thermal power stations, nuclear power stations and
HVAC systems for cooling buildings. The classification is
based on the type of air induction into the tower: the main
types of cooling towers are natural draft and induced draft
cooling towers.
Cooling towers vary in size from small roof-top units to very
large hyperboloid structures (as in the adjacent image) that
can be up to 200 metres (660 ft) tall and 100 metres (330 ft)
in diameter, or rectangular structures that can be over 40
metres (130 ft) tall and 80 metres (260 ft) long. The
hyperboloid cooling towers are often associated with nuclear
power plants,[1] although they are also used in some coal-
fired plants and to some extent in some large chemical and
other industrial plants.

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