Expansion for Heat Absorption
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
All of them achieve the same purpose - to expand the liquid to
become vapor and to cause the evaporator tubes to become cold.
Discover the Best Kept Survival Secrets for Living and Working
in Extreme Temperature Conditions. Uses technologically advanced
electrostatic fabric that actually duplicates and enhances the
thermo-regulatory actions of the body. Keeps the wearer cool in
warm temperatures, and warm in cold temperatures, making it the
only multi-seasonal performance underwear.
Hi-Tech Thermal Underwear
About the Author
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
More information at Marine and M & E
Article Source: http://www.redsofts.com/articles/
More Articles from Technology Category:
How To Extend Licenses To Use Software With A Software License Agreement
Choose the Right Type of Flashlight
Access Control: What is Access Control?
Netflix vs Blockbuster: Which DVD Rental Service is King?
Rotary Tables and Rotary Stages
Is The Pace Of Technology Making Us Stupid?
Electric Linear Actuators - The Rotary Motion Producer
Robotic Arms and Robotics
Linear Stepper Motors Technology
Mp3 Players and Your Hearing Health
Why Should You Have a UPS Battery?
Scissor Lifts - Industry Operations
How to Find the Best Audio Equipment
Sound Proofing Techniques
How to Compare PDA’s