Refrigeration-+Rachael+Mostafa

Rachael Mostafa =Refrigeration=



**Refrigeration is the process that moves heat from one location to another. Heat transferring can be operated by magnetism, electricity, laser and/or other means. Refrigeration has many applications, including, but not limited to: household refrigerators, industrial freezers, cryogenics, and air conditioning. James Harrison was the first person who invented a vapor compression refrigeration system. He noticed that sulfuric ether left the object it was applied on freezing as it evaporated and used this effect to create a vapor compression refrigeration system. In 1856, he patented the vapor compression system that used ether, alcohol or ammonia. Prior to this invention, in 1851 he built a mechanical ice-making machine. By 1854 he was able to make a commercial ice-making machine as well. Commercial vapor-compression refrigeration was introduced to meat packing houses and breweries and by 1861 dozens of these systems were in use.** ** Refrigeration has had an immense impact on various aspects including: industries, agriculture, lifestyle, and settlement patterns. Refrigeration allowed settlers to expand westward in rural, unpopulated areas. All of applications that are fundamentally based on refrigeration are heavily used and completely revolutionized aspects of nutrition, living comfort, production, and many other aspects. Before this time, unpreserved food spoiled very quickly which limited the transportation and distribution of fresh meat, vegetables, and dairy. **


 * Explanation of how it works **
 * " **It's all based on the following [|physics] : - a liquid is rapidly vaporized (through compression) - the quickly expanding vapor requires kinetic energy and draws the energy needed from the immediate area - which loses energy and becomes cooler. Cooling caused by the rapid expansion of gases is the primary means of refrigeration today."

LB: Love this! Great job explaining the concept of refrigeration and then explaining how it works and how it was invented. Nice description of how it has affected life and other technologies.

http://en.wikipedia.org/wiki/Refrigeration http://inventors.about.com/library/inventors/blrefrigerator.htm http://museumvictoria.com.au/about/mv-news/2009/harrison-refrigerator-model/

Comments: -Very Factual, has a lot of information - Spacing out the information into paragraphs would have been easier to read and maybe more organized -more media to space out information -Dope. Thanks for the education on keeping my food good for a couple weeks.