How induced draft cooling towers work?
“Induced draft” is a type of mechanical draft which uses a large fan on top of the tower to draw air up toward the ceiling. While the fan is larger than what you’d use on a forced draft tower, it uses a smaller motor to produce the same water-cooling capacity.
What is the difference between forced draft and induced draft cooling tower?
Forced-draft fans focus the pressure and volume at the outlet of the fan to push air through a system, creating positive air pressure. Industrial induced draft fans operate by focusing the pressure and volume at the inlet of the fan to pull air through a system.
Where forced draft cooling tower is used?
Forced Draft Cooling Towers These models will remove low-potential heat that is generated in the production process. A counterflow of air combined with hot water results in a transfer of heat in the cooling fill. Paper and chemical industry plants often prefer to used forced draft cooling towers.
Why it is called induced draft cooling tower?
As the water flows through the cooling tower, it is exposed to air, which is being pulled through the tower by an induced draft fan or pushed by a forced draft fan. The cooled water is then pumped back to the process equipment, where it absorbs heat.
What gas is released from cooling tower?
A common misconception is that they release pollution. In fact, what they actually release is water vapour – similar to, but nowhere near as hot, as the steam coming out of your kettle every morning. And this probably isn’t the only thing you never knew about cooling towers.
What is the principle of cooling tower?
Cooling tower systems work by using water to extract waste heat from a system and ejecting it into the atmosphere primarily through evaporation. The three key components of a cooling system are the cooling tower, recirculating pump, and heat exchanger. Water first passes through a heat exchanger where it absorbs heat.
What is APH boiler?
Air Preheaters (APH) are Shell and tube type heat exchangers installed in boilers to heat the air before using it for combustion. The main function of an air preheater is to extract the excess heat from the flue gases in the boiler.
What is SA fan?
The secondary air fans (SA fans) play an important supporting role in power plants. The secondary fan allows for complete combustion of the fuel inside the furnace. As and when required the SA fan is used to increase the air flow to improve the efficiency and avoid wastage of fuel.
What is induced fan?
An induced draught fan (ID fan) is provided to maintain a negative pressure in the furnace by sucking the products of combustion from it with a slight positive pressure at the discharge end vis-à-vis the bottom of the chimney/stack.