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Design of Prototype Internal 20k Helium Gas Purification System for Helium Plant & Test Facility


Author(s):

Dhavalkumar B.Prajapati , L.D.College of Engineering; A. K. Sahu, Institute for Plasma Research; Dr.Prof.J.M.Patel, L. D. College of Engineering

Keywords:

Hydrogen Adsorption At 20K, Adsorber Bed, Helium Purification System, Tube-In-Tube Heat Exchanger, Filter

Abstract:

The Helium Refrigerator/Liquefier (HRL) plant being designed at IPR will have in-built helium purification system for removal impurities of hydrogen and trace of neon at 20K by using charcoal. To remove such impurities, adsorber bed is required to use at 20K, which, otherwise, can choke up of the pipe lines and valves leading to large pressure drop and inefficient liquefaction process, it may get condensed and frozen, which can destroy the blades of turbines of HRL. For the actual size purifier, the amount of inlet H2 impurity in the helium stream is about 100 PPM (parts per million) by volume and that at the outlet of the bed it should have less than 5 PPM. The design of this prototype purification bed will be done based on the design and analysis of the actual purification bed and associated filter elements done during 2013-2014. This prototype will include necessary heat exchangers required to reach a temperature in between 20K to 25K, along with the bed. Cold helium will be used to reach such low temperature. The adsorber bed design includes calculation & optimization of size of adsorber bed, the pressure drop and MTZ length calculation using Rosen Model and Axial Dispersion Model and Heat Exchanger design include calculation and optimization of its length, tubes’ diameter & Pressure drop across it. Veracity of this test facility design will be tested during experiment.


Other Details:

Manuscript Id :IJSTEV1I11112
Published in :Volume : 1, Issue : 11
Publication Date: 01/06/2015
Page(s): 510-528
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