Articles Posted in the " Refrigerants " Category

  • FILLING BLANKS- REFRIGERANTS

    FILLING BLANKS- REFRIGERANTS

    https://www.mesubjects.net/wp-admin/post.php?post=7449&action=edit   BLANKS – REFRIGERANTS Filling blanks about refrigerants makes understanding clear and deep. Filling blanks of refrigerants will further increase knowledge of refrigeration. The gas which is a working substance in a refrigerating system is called the ————————-. Refrigerant is used for producing———————in the evaporator.  Chemical formula for R-22 is———————————.  Gas which serves as […]


  • Azeotropes

    Azeotropes

     Azeotropes  Definition Azeotrope is a refrigerant. It is a mixture of two or more components in a fixed proportion by mass. It behaves as a pure refrigerant by evaporating and condensing at fixed temperatures. For example R500, R-501, R-502, R-503. The very first Azeotrope found was named as R-500. Next azeotrope found was named as […]


  • mcq: Refrigerants

    mcq: Refrigerants

    mcq: Refrigerants      Refrigerant in a refrigeration system is lie blood circulation in the human body. It causes cooling by latent heat of vaporization. Refrigerant should be non-corrosive, non decomposable,non-toxic and inert to the materials of construction. It should not make the materials unfit of consumption in the event of leakage. it must be […]


  • * Interview Short  Question Answers on Refrigerants

    * Interview Short Question Answers on Refrigerants

    Interview Short Question Answers on Refrigerants What is a refrigerant? What are types of refrigerants? Refrigerant is a working substance in a refrigeration system. It absorbs heat at the lower temperature because of its very low boiling point. It loses heat to the surroundings at high temperature. This high temperature is reached with the help […]


  • * Short Interview Question Answers on safety of Refrigerants

    * Short Interview Question Answers on safety of Refrigerants

    Short Interview Question Answers on safety  List the safety devices / safety precautions for a refrigeration unit? Low voltage: Use a low voltage cut out and cut-in. High voltage: use a high voltage cut-out and cut-in. Insufficient refrigerant : Check for leakage if any, repair leakage and fill more refrigerant Voltage fluctuations: Use a voltage stabilizer Frequent starts: […]


  • * Refrigerant – Selection

    * Refrigerant – Selection

    Refrigerant–Selection A single refrigerant cannot be applied to all the applications. It is because that all the desirable properties are not possessed by any single substance over a wide range of temperature applications. Therefore, selection is made based on the best combination of properties possessed by a refrigerant for a particular application. DESIRABLE PROPERTIES OF A […]


  • Refrigerant Leakage and leak detection

    Refrigerant Leakage and leak detection

    Refrigerant Leakage TYPES OF LEAKAGES IN REFRIGERATION There are two types of leakages. (i)  External leakage (ii) Internal leakage External leakage: This leakage takes place when internal pressure is greater than atmospheric pressure which is quiet common. In this leakage, refrigerant goes out to atmosphere. If the leakage is not detectable (with most Freon’s) by […]


  • Specific Refrigerants

    Specific Refrigerants

    Specific Refrigerants  SPECIFIC REFRIGERANTS CFC (Cloro- Fluoro- Carbon) refrigerants.  CFC (Fully Clori-fluorinated Hydrocarbon) Refrigerants like R-12, R-13—banned since 1996 Have longer life. Not flammable or non-explosive Low toxicity, noncorrosive, and compatible with other materials Heat or high temperatures can cause these to break down into their elements (harmful to humans-respiratory system especially). Harmful to environment […]


  • Numbering and Nomenclature of Refrigerants

    Numbering and Nomenclature of Refrigerants

    Numbering and Nomenclature of Refrigerants NUMBERING OF REFRIGERANTS (i)For saturated hydrocarbons and their derivatives– three digit number First digit                         = C – 1   = one less than the ‘C’ atoms in the compound Second digit                    = H + 1=one more than the ‘H’ atoms in […]


  • * Refrigerant Classification

    * Refrigerant Classification

    Refrigerants Classification REFRIGERANT The working substance in a refrigeration unit is called a refrigerant. IDEAL REFRIGERANT A refrigerant which has all the desirable properties and can be used in every refrigeration unit is called an ideal refrigerant. But there is no such refrigerant in actual practice.  TYPES OF REFRIGERANTS ON THE BASIS OF THEIR APPLICATION […]