When you choose a career in HVAC repair, you have a wealth of knowledge to learn before you are ready to jump into the field. Someday you will be able to enter a home and solve a radiator problem or air conditioning malfunction, but before that happens you must internalize information regarding the three most important areas of HVAC repair information. These areas include heat transfer, thermodynamics, and fluid mechanics.
Although repairs like these may seem daunting now, they should pose no more of an intimidation than any other unknown vocabulary. Once these definitions have been explained and demonstrated, they will simply become descriptions of well-understood procedures.
It has been said that the very best place to start is the beginning. Heat transfer encapsulates the heart of repairs like these, and so it is fitting to consider this procedure the beginning of the journey. The process of heat transfer occurs naturally in nature, and can be reproduced by people in order to control temperatures of certain environments. In this industry, you will encounter various types of heat transfer. These types of heat transfer include radiation, heat convection, and heat conduction.
The next stop on the journey to becoming a technician will familiarize you with the world of thermodynamics. Basically, thermodynamics is the science behind heat transfer, and therefore, HVAC repair. It is important to understand thermodynamics so that the principles behind a working heating or cooling system do not remain a mystery. If the study of thermodynamics particularly appeals to you, then you can reach beyond the repair and become the thermodynamics engineer who develops the heating and cooling systems of the future.
Finally it will be time to focus on fluid mechanics. When studying fluid mechanics, a student will begin to understand the way that various forces affect fluids such as liquids, plasmas, and gases. Fluid mechanics includes the areas of fluid motion, fluids at rest, fluid dynamics, and fluid kinematics. Because fluids play an integral role in this process, it is crucial to understand basic elements about them.
Although all of this information may seem overwhelming, it is simply a matter of spending some time figuring out what it is all about. Before you know it, you will be the one to save the day when the mall’s air conditioning system breaks. A job like this can be very demanding , one that interrupts your sleep, your vacations, and your holidays. However, the service that you will be providing to others makes it all worthwhile.
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* 133 – Second Law of Thermodynamics
In this video Paul Andersen explains how the second law of thermodynamics applies to reversible and irreversible processes. In a reversible process the net change in entropy is zero. In and irreversible process the entropy will always increase in a closed system. The entropy measures the disorder in the entire system and will move in the direction of time’s arrow. Several example videos of increasing entropy are included.
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Title: String Theory
Artist: Herman Jolly
All of the images are licensed under creative commons and public domain licensing:
Ebeling, ESA/Hubble, NASA and H. English: At First Glance, the Scatter of Pale Dots on This NASA/ESA Hubble Space Telescope Image Looks like a Snowstorm in the Night Sky. But Almost Every One of These Delicate Snowflakes Is a Distant Galaxy in the Cluster MACS J0717.5+3745 and Each Is Home to Billions of Stars., August 16, 2010. http://spacetelescope.org/images/potw1017a/. http://commons.wikimedia.org/wiki/File:Cluster_MACS_J0717.5%2B3745.jpg.
Second Law of Thermodynamics