Articles Posted in the " Cryogenics " Category


  • 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, […]



  • CRYOGENICS—-LIQUEFACTION OF AIR–LINDE’S AND CLAUDE’S PROCESSES —- SHEET3

    CRYOGENICS—-LIQUEFACTION OF AIR–LINDE’S AND CLAUDE’S PROCESSES —- SHEET3

    LIQUEFACTION OF GASES Principle of Liquefaction Liquefaction of gases is achieved by employing. Joule Thomson expansion alone as in Linde’s process  or Isentropic expansion as well as Joule Thomson expansion as used in Claude’s process Liquefaction of air Linde’s process Claude’s process Linde’s (or hampson) air liquefaction method Principle – Uses only Joule Thomson expansion […]



  • REFRIGERATION CRYOGENICS—INTRODUCTION AND PRACTICAL APPLICATIONS OF CRYOGENICS—-SHEET 1

    REFRIGERATION CRYOGENICS—INTRODUCTION AND PRACTICAL APPLICATIONS OF CRYOGENICS—-SHEET 1

    REFRIGERATION CRYOGENICS—INTRODUCTION AND PRACTICAL APPLICATIONS OF CRYOGENICS  —-SHEET 1 INTRODUCTION Cryogenics involves the study of temperatures below -1500C.  It also deals with how to produce these temperatures, and how materials behave at those temperatures. There are many areas of interest where we need cryogenic temperatures such as storage of large volumes of gases in small […]


  • Applications of Cryo-genics

    Applications of Cryo-genics

    DEFINITION OF CRYOGENICS It is a science which deals with creating and maintaining temperatures lower than -1500C. Liquefaction of air at -1910C Liquefaction of hydrogen at -2530C Magnetic cooling 0.001 K APPLICATIONS OF CRYOGENICS 1.Industrial applications i. Shrink fitting of metals ii. Liquid oxygen is used in welding iii. Liquid oxygen is used in the […]




  • * Air Liquefaction—Linde’s and Claude’s Air Liquefaction Method

    * Air Liquefaction—Linde’s and Claude’s Air Liquefaction Method

      Air Liquefaction—Linde’s and Claude’s Air Liquefaction Method AIR LIQUEFACTION–Linde’s Process PRINCIPLE OF LIQUEFACTION Liquefaction of gases is achieved by employing. Joule Thomson expansion alone   or isentropic expansion as well as Joule Thomson expansion Liquefaction of air a)   Linde’s process b)   Claude’s process Linde’s (or hampson) air liquefaction method Principle – Uses only Joule […]