The Inner Workings of

Old and Modern

RefrigeratorsEric Abercrombie

Levi Algozino

E-Design 100 Section 9

Pennsylvania State Universityhttp://upload.wikimedia.org/wikipedia/commons/3/36/ExpensiveRefrigerators.JPG

Refrigeration is the process of removing heat from an enclosed space generally by evaporating and condensing a substance (usually a CFC gas).

http://firstcoastac.com/faq/freon/

Several Types of Gases have been used in refrigeration systems as chemists discover more efficient systems.

http://upload.wikimedia.org/wikipedia/commons/thumb/3/34/Sulfur_dioxide.svg/467px-Sulfur_dioxide.svg.png

http://www.gcsescience.com/Ammonia-Molecule.gif

http://upload.wikimedia.org/wikipedia/commons/thumb/3/30/Methyl_Chloride.svg/261px-Methyl_Chloride.svg.png

Almost all have been phased out due to harmful effects to either the surrounding area or the o-zone layer.

Cooling both a freezer and a refrigerator involves the coolant previously mentioned (usually Freon), getting put through a short process.

1: Compression2: Release of heat3: Expansion4: Cooling of unit5: Back to compression

http://www.realsimple.com/food-recipes/tools-products/appliances/how-does-refrigerator-work-00100000087962/index.html

The interior refrigeration system

Substance vaporized

Heat absorbed

Substance liquefied

http://www.energyquest.ca.gov/how_it_works/refrigerator.html

If a temperature is set on a refrigerator, the cycle just continues until the desired temperature is reached.

When a special thermometer detects that the fridge has reached the proper temperature, it simply shuts off the motor and the refrigeration cycle is halted.

http://www.tmchallcrest.com/fridge-freezer-indicators.php

Works Cited:

http://www.energyquest.ca.gov/how_it_works/refrigerator.html

http://firstcoastac.com/faq/freon/

http://inventors.about.com/library/inventors/blrefrigerator.htm

http://www.realsimple.com/food-recipes/tools-products/appliances/how-does-refrigerator-work-00100000087962/index.html

http://home.howstuffworks.com/refrigerator4.htm