Expansion for Heat Absorption

Thomas Yoon
 


Visitors: 829

In the refrigeration cycle, the refrigerant must undergo a change in state in order for the heat to be absorbed from the environment.

The refrigerant has the property of changing its state from liquid to vapor at normal room temperatures.

Have you ever felt your skin becoming cool whenever you put alcohol on it? Or even when a bit of petrol spilled onto your hands? It's because, the alcohol or petrol has evaporated when it comes in contact with your skin.

The result - heat is removed from your skin, and it feels cool!

In a closed-loop refrigeration circuit, the change of state from liquid to vapor is achieved mechanically by pressurizing the liquid at one end and forcing it through a small opening at another end.

Once the liquid comes out from the small opening, it expands into vapor. The effect is similar to the spray you get when you restrict the outlet of your garden hose. But water is not a refrigerant. It does not feel cold because it does not change to a vapor.

Bad example. But you get the idea? Pressurized restriction causes spray at the other end.

In many refrigeration circuits, the small opening is made in the form of a thermostatic expansion valve. Many other designs make use of small capillary tubes. In big chillers, orifice plates are common.

All of them achieve the same purpose - to expand the liquid to become vapor and to cause the evaporator tubes to become cold.

Until next time…

"Tap traditional but EFFECTIVE INFORMATION!" Magazines have more information that you can use. http://www.free-marine.com/linkmagazinecity.htm

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 ezine at mailto:facworld-subscribe@yahoogroups.com More information at http://www.free-marine.com and http://www.free-engineering.com

(340)

Article Source:


 
Rate this Article: 
 
More Evidence that Green Tea Blocks Fat Absorption
Rated 4 / 5
based on 5 votes
ArticleSlash

Related Articles:

Heat Strokes Treatment - Effective Home remedies for Heat Stroke

by: Lovel Rose (October 22, 2010) 
(Health and Fitness/Alternative)

Solar Panel / Heat Pump Renewable Heat Incentive

by: Jenny Pilley (February 11, 2011) 
(News/Energy)

Solar Air Heat Is an Easy and Inexpensive Way to Heat Your Home

by: Christopher Lollini (August 09, 2010) 
(Home Improvement/Energy Efficiency)

Radiant Floor Heat Is The Best Kind Of Heat

by: Jeremy Stevent (February 12, 2008) 
(Home Improvement/Flooring)

Vitamin B-12 Absorption

by: Gloria Ruffell (June 27, 2006) 
(Health and Fitness/Supplements)

Hypnotherapy - A State of Inner Absorption

by: Dane Bergen (July 24, 2008) 
(Self Improvement/NLP Hypnosis)

Absorption Rate and Months of Inventory

by: Marco Santarelli (August 12, 2008) 
(Investing)

Factors that Influence the Absorption of Hydroponics Nutrients

by: Jennifer Dsouza (April 24, 2012) 
(Home and Family/Gardening)

Improve Nutrient Absorption by Taking This Oil

by: John Goh (December 09, 2006) 
(Health and Fitness)

More Evidence that Green Tea Blocks Fat Absorption

by: Jon Stout (February 14, 2007) 
(Health and Fitness)