ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel
  • »
  • Home»
  • Home Appliances»
  • Kitchen Appliances

What is Exactly a Refrigeration or Air Conditioning system?

Updated on August 26, 2017

Definition of Refrigeration System.

The basic idea of Refrigeration first came from the 2nd Law of Thermodynamics. Which states that "Its Impossible to transfer heat form a lowers temperature body to a higher temperature body without the help of any third agent". This law introduced the idea of Refrigeration and need of a refrigerant to transfer heat from the hot body to cold body.

The refrigeration was once a part of Thermodynamics but the field became so vast that it became an individual subject then. As the increase of use of refrigeration system it is now a very rich subject worldwide.

For clear understanding its necessary to know what is a Refrigeration system, it is defined as a system which can reduce the temperature or heat of a substance under a controlled condition. So from the definition we can see that its purpose is to reduce heat form any required substance.But its impossible if you try to achieve if normally, because you can't keep a substance under atmospheric temperature without heat reduction from that substance.

For example if a body at lower temperature than atmosphere it will gain heat from the atmosphere until it achieve the same temperature. Similarly if a hot body is kept in the open atmosphere it will lose its heat until it achieve the atmospheric temperature. So the difference is heat gain and heat lose. Cold body gains heat, and hot body loses it. The refrigeration is the system which keeps the cold body at its cold state which is obtained by the processing the refrigerant. The refrigerant is the "Third agent or external agent" which absorbs the heat and releases to the atmosphere and keep the body or substance at cold state.


Unit of Refrigeration: The unit of Refrigeration is is called Tonne of Refrigeration. A tonn of refrigeration means The cooling effect obtained by the melting of 1000kg of ICE from 0°C to 0°C water. For practical use 1 tonne of Refrigeration= 210 kJ/min or 3.5kW.

Source
Source
Source

Classification of Refrigeration system.

Refrigeration system Mainly work on Reversed Carnot cycle. Its the reversed system of Heat Engine as it's input is work and output is cooling effect. So total heat reduction is proportional to the work input given to the system according to the 1st law of thermodynamics.

The basic Refrigeration system which is called "Vapour Compression system" it operates on Reverse Carnot cycle and its the most simple one and this method is widely used for its simplicity, efficiency and Compactness. This system uses different refrigerant according to the requirements. The most widely used refrigerant's are Ammonia, Carbon-di-Oxide, Freon's.

This system consists 4 main part's : 1: Compressor: It compresses the refrigerant to a particular pressure and temperature and reduces the volume.

2:Condenser: It reduces the heat of the refrigerant as it was at high pressure and temperature. The pressure does not reduce in condenser.

3: Expansion Valve: It reduces the condensed refrigerants pressure and as suddenly the refrigerant depressurize the temperature reduces drastically.

4: Evaporator: Here the refrigerant absorb the required heat from the body or substance to be cooled, and become vaporized and ready to go to the compressor for next cycle.



Another most Popular Refrigeration method is "Vapor Absorption Refrigeration System", this is mainly developed to reduce the compression work on Vapor compression cycle. This system replaces compressor with another subsystem which contains a Pump, Absorber, Pressure reducing valve and a Generator. Other part's are similar to Vapor compression system.

This system uses ammonia solution as refrigerant. The 3rd image shows the whole system of the vapor absorption refrigeration system. The high pressure ammonia vapor Goes to condenser and become cold then the liquid ammonia goes through expansion valve where it depressurize and become more cold then it moves toward the evaporator and here it absorbs heat from the body which to be cooled. Then the low pressure vapor ammonia moves toward the absorber which absorbs the ammonia and make a strong solution which is then pumped toward the generator, this generator generates vapor of ammonia using steam or heat supply. This vapor again goes to the condenser and the procedure repeats. its bit complicated but it has good efficiency.

It mainly used for industrial purposes, rather than Domestic purpose.

Comments

    0 of 8192 characters used
    Post Comment

    • profile image

      muzafar ali 2 years ago

      Really here is a good knowledge to learn..

    • profile image

      pavan 2 years ago

      i like this very much

    • profile image

      Kennedy 3 years ago

      I like all this much will like to learn more about refrigeration thank you.

    working

    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, hubpages.com uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at: "https://hubpages.com/privacy-policy#gdpr"

    Show Details
    Necessary
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the googleapis.com or gstatic.com domains, for performance and efficiency reasons. (Privacy Policy)
    Features
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Marketing
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Statistics
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)