Articles Posted in the " Refrigeration " Category

  • FILL IN THE BLANKS FOR REFRIGERANTS

    FILL IN THE BLANKS FOR REFRIGERANTS

      FILL IN THE BLANKS FOR REFRIGERANTS The gas which is a working substance in a refrigerating system is called the ————————-. Refrigerant is used for producing———————in the evaporator. The chemical formula for R-22 is———————————. The gas which serves as a medium of transferring heat from one place to ——is called refrigerant. Ammonia boils at […]




  • REFRIGERATION, ITS MEASUREMENT AND SYSTEM——————-Fill in the blanks.

    REFRIGERATION, ITS MEASUREMENT AND SYSTEM——————-Fill in the blanks.

    REFRIGERATION, ITS MEASUREMENT AND SYSTEM——————-Fill in the blanks. Refrigeration is a process of ——————–. The process of refrigeration is used to protect —————–against spoilage. The growth of bacteria is greater in a ————————-atmosphere. The growth of bacteria can be stopped by ———————. Refrigeration is based on the principle that ————causes cooling. Refrigeration capacity is expressed […]




  • VAPOR ABSORPTION REFRIGERATION ———QUESTION ANSWERS FOR BETTER UNDERSTANDING

    VAPOR ABSORPTION REFRIGERATION ———QUESTION ANSWERS FOR BETTER UNDERSTANDING

    VAPOR ABSORPTION REFRIGERATION ———QUESTION ANSWERS FOR BETTER UNDERSTANDING It is a simple method. It is an economical method for producing refrigeration. It differs mainly with compression system that it uses heat energy instead of electric energy to change the state of the refrigerant to complete the refrigeration cycle.   The heat energy required can be obtained […]


  • REFRIGERATION————–LAWS OF REFRIGERATION

    REFRIGERATION————–LAWS OF REFRIGERATION

    REFRIGERATION————–LAWS OF REFRIGERATION LAWS OF REFRIGERATION Work is converted into as in vapor compression refrigeration as heat lost from the condenser is sum of heat gained in the evaporator from the products to be cooled and the work input in the compressor. Qcondenser =Cooling effect +work input to compressor=N+W Heat is converted into work as […]



  • CRYOGENICS—–Liquefaction of Helium and Magnetic Cooling —–SHEET 5

    CRYOGENICS—–Liquefaction of Helium and Magnetic Cooling —–SHEET 5

    CRYOGENICS—–Liquefaction of Helium, Magnetic Cooling and Nuclear demagnetization—–SHEET 5 Liquefaction of Helium by Collins’s Cryostat Principle (i)  Polytropic expansion for precooling Throttling for liquefaction. Liquifaction of helium(Fig.4) uses normal boiling liquid nitrogen for precooling before the helium enters the first cascade heat exchanger. Since helium liquefies at a lower temperature than that of even hydrogen, […]