Info and Resources

  

Uline Refrigerators

Refrigeration


Refrigeration (from the Latin ''frigus'', frost) is generally the cooling of a body by the transfer of a portion of its heat away from it. Applications include conservation, especially of food, and lowering the temperature of drinks to one that is more agreeable for consumption. Domestic refrigerators are common in kitchens, with separate sections or separate machines for cooling and freezing. Cooling of something hot is often done by means of material at ambient temperature, for example the fan cooling of computer equipment. Where temperatures below that of any available natural cooling agent are required, refrigerators are used to produce the required cooling effect by taking in heat at low temperatures and rejecting it at temperatures somewhat above that of the natural cooling agent, which is generally water or air. The function of a refrigerating machine, therefore, is to take in heat at a low temperature and reject it at a higher one, using external energy to drive the process. A refrigerator is effectively a heat pump, a heat engine running in reverse. It is also possible to use eutectic salts.

Thermodynamics of refrigerators

Most home and automotive refrigerators qualify as phase change heat pumps. They convert a refrigerant from gas to liquid and back again by compression in a refrigeration cycle. In principle, any endothermic process could be used provided it is balanced by an exothermic in another physical location so that it can operate in a cycle. For example, absorption of gaseous ammonia into water is used in most gas absorption refrigerators, and the Einstein Refrigerator is a version of this which contains no moving parts — the cooling effect in this case coming from the heat absorbed by the ammonia when it evaporates from the water. Other processes which have been used on a small scale include the Peltier effect for thermoelectric cooling.

History of refrigeration

  • Ice houses
  • Making

    Refrigeration


    Thanks, Anome. It's a real cool article (brr!) ---- I can see that the article is unfinished. I look forward to when it's frozen. ---- The article on James Harrison says that he had a patent for a ''ether liquid-vapour compression refridgeration system'' in 1855. This article says 1876 by Karl von Linde. Which is it? Auric The Rad 19:27, Jan 21, 2004 (UTC)

    Refrigerant


    A refrigerant is a compound used in a heat cycle that undergoes a phase change from a gas to a liquid and back. The two main uses of refrigerants are refrigerators/freezers and air conditioners. The ideal refrigerant has good thermodynamic properties, is noncorrosive, and safe. The desired thermodynamic properties are a boiling point somewhat below the target temperature, a high heat of vaporization, a moderate density in liquid form, and a relatively high density in gasous form. Since boiling point and gas density are affected by pressure, refrigerants may be made more suitable for a particular application by choice of operating pressure. Corrosion properties are a matter of materials compatibility with the components used for the compressor, piping, evaporator, and condenser. Saftey considerations include toxicity and flammability. Until concerns about depletion of the ozone layer arose in the 1980s, the most widely used refrigerants were the halomethanes R-12 and R-22, with R-12 being more common in automotive air conditioning and small refrigerators, and R-22 being used for residential and light commercial air conditioning, refrigerators, and freezers. Some very early systems used R-11 because its low boiling point allows low-pressure systems to be constructed, reducing the mechanical strength required for components. R-134a and certain blends are now replacing chlorinated compounds.

    Numbering

    The R-# numbering system was developed by DuPont and systematically identifies the molecular structure of refrigerants made with a single halogenated hydrocarbon. The meaning of the codes is as follows:
  • ''Rightmost digit'' - Number of fluorine atoms per molecule.
  • ''Tens digit'' - One plus the number of hydrogen atoms per molecule.
  • ''Hundreds digit'' - The number of carbon atoms minus one. Omitted for methyl halides, which have only one carbon atom.
  • ''Thousands digit'' - Number of double bonds in the molecule. This is omitted

    Refrigerator


    :''Freezer redirects here. Freezer is also the Japanese name for Articuno, a Pokémon.'' A refrigerator (often shortened to fridge) or freezer is an electric appliance that uses refrigeration to help preserve food. A domestic refrigerator is present in 99.5% of American homes. It works using phase change heat pumps operating in a refrigeration cycle. An industrial refrigerator or industrial freezer is simply a refrigerator used in an industrial setting, usually in a restaurant or supermarket. They may consist of either a cooling compartment only (a larder refrigerator) or a freezing compartment only (a freezer) or contain both. The dual compartment was introduced commercially by General Electric in 1939. Some refrigerators are now divided into four zones for the storage of different types of food:
  • -18°C or 0°F (freezer)
  • 0°C or 32°F (meats)
  • 4°C or 40°F (refrigerator)
  • 10°C or 50°F (vegetables), for the storage of different food types. The capacity of the refrigerator (freezer and/or fridge) is measured in litres (or cu. ft.). Typically the freezer volume is 100 litres (this will vary) and the fridge 140 litres.

    Types

  • Freestanding
  • Built under: fridges and freezers which can be installed under the counter top.
  • Integrated.
  • In-Column fridges or freezers: these are built into a tall cabinet in your kitchen furniture. The appliance is built in to your kitchen so that it looks like a normal cupboard. Getting the right size fridge is very important when choosing integrated.
    Freezer situation
  • Eye level freezer refrigerator (or top mount).
  • Bottom freezer refrigerator (or bottom mount). The freezer is generally bigger and the refrigerator has two independent motor-compressors.

    Features

    Some newer refrigerators may feature:
  • An LCD suggesting what types of food should be stored at what temperatures and the expiry date of the food stored.
  • Filter

    Refrigerator


    Moved here from Domestic refrigerator because only 6 or 7 articles linked directly to that article, while the vast majority linked here. Plus, Wikipedia articles are named according to common usage, and calling this device a "refrigerator" is orders of magnitude more common than call it a "domestic refrigerator". It doesn't matter if "domestic refrigerator" is more correct, or if you think the article ''should'' be there. All that matters is commonness. This title is much much much more common than that one, so it gets to host the article. --brian0918™ 13:55, 5 May 2005 (UTC) :As I understand it, there are domestic and industrial fridges. I know nothing about the latter, but I'll fix the intro to explain that. --SPUI (talk) 16:29, 5 May 2005 (UTC)

    Sub-Zero Refrigerator


    Sub-Zero Refrigerators In 1945, the Sub-Zero Freezer Company was founded by Wesyte F. Bakke in Madison, Wisconsin. The company has since become the Lexus of luxury kitchen appliances. Sub-Zero invented the concept of built-in design and dual refrigeration. The latter provides clean air flow, resulting in fresher and longer lasting food. In the 1990's, Sub-Zero invented refrigerator drawers, wine coolers and aquired Wolf Appliance, the luxury cooking appliance manufacturer of ranges, cooktops and grills. Sub-Zero began to define the commercial look with professional style kitchen appliances. From Brad Pitt to Bill Clinton, and to almost every home on MTV's Cribs, Sub-Zero refrigerators, freezers and wine storage units are the anchor in luxury kitchens across America. As Owen Wilson says in the classic comedy 'Meet the Parents,' "I have the twin stainless steel Subz refrigerators..." The appliances are known as the definative kitchen appliance. http://www.subzero.com It wasn't until the late 1990's when similar competitors began entering the built-in refrigerator market. These include GE Profile, GE Monogram, Thermador, Viking Range, LG, Jenn-Air and Dacor. However, even with the Sub-Zero clones, the company continues to define the best refrigeator. As they invented the built-in style, people still associate the look with Sub-Zero. As in "I want a Sub-Zero style refrigerator and a Viking style range." They are also the only appliances included in real estate ads, as in "Includes a Sub-Zero refrigerator." The value of these appliances help increase home value.

  • http://www.fresherfood.com Fresher Food
  • http://www.subzeropro48.com Sub-Zero PRO 48 Refrigerator
  • http://www.hypnoticnet.com/best_kitchen_appliances.html Best Kitchen Appliances


    Universal Stainless | Vancouver | Vintage Baseball Hats | Wart Removal | West Nyack | Windows Andersen | Ws 65511 | 002 | 4 Less | Adidas Clothes | Alliance Imaging | Antidepressions | Ash Furniture | Auto Barriers | Banding Tools | Bed And Breakfast Charlottesville Va | Biotech India | Book Keeper | Brush Truck | Ca Smog Check
    Uline Refrigerators
    Ultra Bath | Ultra Thin Watch | Ultralight Airplane | Ultralight Tarp | Ultrasonic Dog Repellent | Ultrasonographers | Umatilla Florida | Umax Astra 4400 | Umbrella | Umbrella Bags | Umbria Italy | Umpire Shirts | Unbottle | Uncensored Newsgroup | Unclaimed State | Uncle Sam Costume | Unclogging Arteries | Under 10 | Under Coating | Underage Drinking And Driving

    Uline Refrigerators
    • Uline Refrigerators

    © THIS PAGE ON Uline Refrigerators, COPYRIGHT 2004 ALL RIGHTS RESERVED -- Some Segments Used from Wikipedia under the GNU Free Documentation License