Articles Posted in the " liquefication of gases " Category

  • Liquefaction of Helium and Magnetic Cooling

    Liquefaction of Helium and Magnetic Cooling

    Liquefaction of Helium, Magnetic Cooling  Liquefaction of Helium by Collins’s Cryostat Principle (i)  Polytropic expansion for pre-cooling (ii) Throttling for liquefaction. Liquefaction of helium(Fig.4) uses normal boiling liquid nitrogen for pre-cooling before the helium enters the first cascade heat exchanger. Since helium liquefies at a lower temperature than that of even hydrogen, more number of […]


  • CRYOGENICS-LIQUEFACTION OF GASES-2

    CRYOGENICS-LIQUEFACTION OF GASES-2

    CRYOGENICS-LIQUEFACTION OF GASES-2 A modified Claude cycle is taken into consideration to design nitrogen liquefies to take the advantage of both the turbo-ex pander and Joule Thomson valve [Fig.3(a)]. Instead of three heat ex changers as in the Claude cycle, two numbers of heat ex changers are used in this liquefier. Last two heat ex […]


  • * Throttling and Free Expansion Processes

    * Throttling and Free Expansion Processes

    Throttling and Free Expansion Processes  Throttling Process This is an expansion process at constant enthalpy. That it is found refrigeration and air-conditioning where the LIQUID is throttled. Further, process is also found in the liquefaction of gases. Throttling is an irreversible process. No work is obtained at the decrease of pressure. Thus, it is not […]


  • ** Cryogenics- Liquefaction of Gases-1

    ** Cryogenics- Liquefaction of Gases-1

    Cryogenics- Liquefaction of Gases-1 Cryogenics  involves the study of temperatures below -1500 C, how to produce them, and which materials behave at those temperatures. There are many areas of interest where we need cryogenic temperatures such as (i)   Storage of large volumes of gases in small space in the liquefied form (ii)  Preservation of insemination […]