Free Articles  >>  Technology >>  Page 198  >> 

Cooling Towers the Industrial Workhorses

Cooling Towers - the Industrial Workhorses   by Thomas Yoon

Industrial Processes usually produces a lot of heat. Air-conditioning also removes heat from the indoor areas through heat exchangers.

Where does all the heat go?

All these heat has to be removed. If you are not near the sea, you have to use cooling towers to cool down your warm water.

Cooling towers make use of air currents to cool warm water. However, a basic rule has to be made when you want to extract heat from any object, including water. Heat has to be taken from a higher temperature source to a lower temperature medium.

If the air is already warm, it will not be able to cool down the warm water. The temperature difference is very important.

Another important point in cooling tower efficiency is how much the water is exposed to the air. If the water is allowed to trickle down, and their contact surface with the air is made large, more heat exchange takes place.

Plastic diffusers designed with wavy patterns are inserted at cooling towers to increase the contact surfaces of the water when it meets with the cooling air stream.

There are several shapes of cooling towers, but they operate on the same principle.

There are basically 2 types airflow patterns in cooling towers:

The cross-flow type of cooling tower makes use of air flowing at right angles to the water dropping down. The fans are positioned so that the air stream flows through the cooling tower from the sides. Water is distributed at the top, and is allowed to drip down to meet with the air.

The characteristic shape of these cooling towers is usually rectangular shape. Depending on the design, there may be several small fans installed at the top of the cooling tower. However, the fan(s) may also be located at the sides of the cooling tower and the air may be ducted.

The counter-flow type of cooling tower makes use of air flowing in the opposite direction and against the flow of the water. In one design, water flows out through rotating spreader arms to distribute the water and let it drop through the plastic diffusers evenly.

In this design, the shape of the cooling tower is a bottle shape. It is fitted with one single large fan to suck the air to create the airflow. The diameter of the area where the heat exchange takes place is made larger so that more contact surfaces is exposed. The fan is heavy and huge. Its speed is usually made lower than that of the motor by the use of reduction gears.

There may be a few designs. Some use fans located at the bottom, some have fans at the top, some have large fans, some make use of several small fans.

The materials used in cooling towers have to be selected to be able to withstand ultraviolet ray exposure from the sun, moisture and other outdoor weather effects.

Cooling towers are truly rugged workhorses of industry.

Folks, be cool!

"Prepare MARKETING MATERIALS from the Source!"
Magazines provide more information for you.
<a href="https://">Magazines</a>

About Author Thomas Yoon :

Many years of working experience in Marine, Facilities, Construction has given the author material for writing e-books and articles related to engineering, and management. Subscribe to facworld ezineMore information at Marine and M & E

Article Source:
Article Url:

Other Articles by Thomas Yoon

Vital Chemicals for Cooling Towers
by Thomas Yoon Cooling towers are used to cool down hot condenser water taken from chillers of air conditioning systems. The cooling effect of cooling towers are attributed to the evaporation of the water when it is blown through by air from the fans.After some time of circulating through the cooling towers, the water becomes more and more concentrated with the dissolved salts in the water. The concentrated water has to be drained off and fresh new water added into the system to make it...

Condensers The Liquid Producers
by Thomas Yoon Some people call them capacitors. Others call them condensers. These components store electrical charges. Mechanical systems also have condensers. Condensers are found underneath steam turbines. Air-conditioning systems have condensers too.How this name came about is a mystery to me. Perhaps it is because the condenser is the place for converting vapor or gas into liquid - at least for mechanical systems.So it is a kind of heat exchanger. What is the cooling medium?For...

Cooling Down by Evaporating
by Thomas Yoon Evaporator coils of air conditioning systems are sometimes called cooling coils. But cooling coils are also used in air-handling units. These contain chilled water. These are completely different from those used in direct expansion air cond units.So cooling coils is not an accurate word to use in small air cond units. Evaporator coils should be used instead. Evaporator tubes must contain refrigerant liquid that can evaporate to become gas. In an air conditioning system, when...

How Big Buildings Circulate Air
? by Thomas Yoon How do big shopping complexes, offices and commercial buildings cool their indoor space? For big buildings, we need big cooling capacities. Central air-conditioning systems using chillers are used. Chilled water is the most convenient way to collect the heat from the indoor spaces. We just need pipes. Miles and miles of them.Chilled water from the chillers is about 44 degree Fahrenheit (about 7 deg C). In order for the room heat to be transfered to the water efficiently, the...

Oil or Grease Lubrication
? by Thomas Yoon A lubricating grease is usually a mixture of 85 to 90 percent mineral oil or synthetic oil together with a thickener. In a majority of all greases, the thickener is a metallic soap. One example is lithium stearate for lithium soap.The function of the thickener, the metallic soap, is to hold the lubricating oil in a semi-liquid state for easier handling.When there is rise in temperature, the oil bleeds out from the thickener and functions as a lubricating agent. When the...

Simple But Powerful Centrifugal Chillers
by Thomas Yoon Centrifugal chillers are used for cooling large buildings in a centralized air conditioning system. There are other types of chillers using screw compressors and reciprocating compressors. These are usually smaller in size. Today's topic is about centrifugal chillers - the ultimate choice for any air conditioning installations higher than 500 RT (refrigeration tons)Basically, centrifugal chillers use centrifugal fans to move the refrigerant within the chiller circuit. As with...

Simple Sealing Solution for Pump Shafts
by Thomas Yoon In this issue, we will focus on a much simpler way of sealing a rotating shaft of a pump. It's by using gland packing. This method of sealing has been in use for a very long time, and is still being used today.There are advantages and disadvantages in using them.Perhaps the first and foremost reason for replacing them with mechanical seals is because of the fact that gland packing needs a small amount of leak for cooling purposes.A person who installs a gland packing must...

Emergency Gas Fire
by Thomas Yoon WooooooooWooooThe siren sounded. All of us looked at each other with excitement. The time has come for us to go into action.From all over the building, we can see Emergency Response Team members coming out, some looking a bit dazed. A general alarm had been sounded and the ERT has been activated!At the command post, the Commander quickly briefed all the ERT members about the situation. There was a fire at the LPG storage tank, and there was an urgent need to put out the...

What Do You Mean by Four Stroke
? by Thomas Yoon What is a 4-stroke diesel engine?As the name suggests, these engines work on reciprocating actions of pistons. One stroke means one linear motion of the piston in one direction. When the piston moves in the opposite direction, that is counted as another stroke.For a 4-stroke engine, the piston has to move up, then down, then up again, and then down again to complete one cycle of the engine. In that 4 stroke of the piston, the crankshaft will have turned 2 revolutions.The 4...

How Often Do You Change Oil
? by Thomas Yoon In our previous issue, we discuss about the properties of lubricating oil and what to look for when buying or replacing them. Ezine ArticleToday, we want to find out as to when to replace the lubricating oil. If you have a large quantity of lubricating oil to change, it is going to burn a hole in your pocket. So most plant operators try to preserve the properties of the lubricating oil for as long as possible.One of the most important functions of lubricating oil is to...

Click here to see More Articles by Thomas Yoon
Publishers / Webmasters
Article ID: 23260
DELINK URL from Authors Bio
REMOVE Article
Tell A Friend
Leave A Comment!
Download this article in PDF
Report Article!
Search through all the articles:

192 Users Online!!
Related Articles:
Latest Articles:
Technology >> Top 50 Articles on Technology
Category - >
Advertising Advice Affiliate Programs Automobiles
Be Your Own Mentor Careers Communication Consumers
CopyWriting Crime Domain Names DoT com Entrepreneur Corner
Ebooks Ecommerce Education Email
Entertainment Environment Family Finance And Business
Food & Drink Gardening Health & Fitness Hobbies
Home Business Home Improvement Humour House Holds
Internet And Computers Kiddos and Teens Legal Matters Mail Order
Management Marketing Marriage MetaPhysical
Motivational MultiMedia Multi Level Marketing NewsLetters
Pets Psychology Religion Parenting
Politics Sales Science Search Engine Optimization
Site Promotion Sports Technology Travel
Web Development Web Hosting WeightLoss Women's Corner
Writing Miscellaneous Articles Real Estate Arts And Crafts

Disclaimer: The information presented and opinions expressed in the articles are those of the authors
and do not necessarily represent the views of and/or its owners.

Copyright AwareINDIA. All rights reserved || Privacy Policy || Terms Of Use || Author Guidelines || Free Articles
FAQs Link To Us || Submit An Article || Free Downloads|| Contact Us || Site Map  || Advertise with Us ||
Click here for Special webhosting packages for visitors of this website only!
Vastu Shastra

Linux Multi Domain Hosting Provided By AwareIndia

Company IDS