Cryogenic data poster
I would like to get several copies of the wonderful “Cryogenic Data” poster that was produced by the Culham Laboratory in 1970. Does anyone know from whom they can be obtained?
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Thermal conductivity of zirconia and Y-stabilized zirconia
We have been searching for information about the low temperature (4K -> 77K) thermal conductivity of zirconia and Y-stabilized zirconia without much success. Is anyone aware of sources for this information?
Portable equipment for an iqf system?
We are interested in purchasing small portable equipment for an iqf system. We want to process between 500 to 1000 Kg/day of berries and strawberries. Can you please let us know about equipment that can meet our requirements? Please specify the installation area we will need plus additional facilities and...
Transporting tank for Liquid Helium with special option for filling cylinders with gaseous helium
We are looking for a transporting tank for Liquid Helium with the special option for filling cylinders with gaseous helium. This unit should transport LHe and have the ability to fill 40-liter cylinders with helium at pressures up to 150-200 bar.
Industrial cryogenic pump manufacturers?
I am working on a cryogenic plant project and looking for industrial cryogenic pump manufacturers. Any guidance would be greatly appreciated.
University programs for PhD in cryogenic rocket engines?
I have completed a Masters in Cryogenic Engineering after my Bachelors degree in Mechanical Engineering from Gujarat University (India).
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Refrigerators and Liquefiers
Two of the most common terms used in cryogenics are “refrigerator” and “liquefier.” These terms describe similar and, as will be seen, in some cases identical components. A refrigerator provides cooling (that is, absorbs heat) at cryogenic temperatures. Refrigerators typically put a working fluid (such as helium) through one of...
Air Separation
Air separation is one of the largest, as well as earliest, industrial applications of cryogenics. In this process, cryogenic temperatures are used to separate air into its constituent gases: nitrogen (78.08%), oxygen (20.95%), argon (0.93%) and carbon dioxide (0.3%). Trace gases such as krypton, neon, xenon and helium total far...
Coefficient of Performance and Figure of Merit
The coefficient of performance (COP) is used to describe the effectiveness of refrigerators, including those operating at cryogenic temperatures. The COP is defined as the amount of heat removed at the cryogenic operating temperature of the refrigerator divided by the amount of work that must be applied to remove the...
Air Separation and Liquefaction
by Nils Tellier, PE, President, EPSIM Corporation (CSA CSM) nils@epsim.us All illustrations courtesy EPSIM Corporation Background History of Air Separation and Liquefaction This section builds on a rich history of methods to develop deep refrigeration and cryogenic liquefaction during the 19th Century. You are encouraged to read Cryo Central’s History...
Bose-Einstein Condensate
A Bose-Einstein condensate, first proposed in 1925 by Albert Einstein based on work done by Satyendra Nath Bose (the same Bose from whom the term boson is derived), is a super-cold state of matter in which almost all of the individual atoms have “condensed” down to the lowest possible quantum...
Cold Technology for Pest Control
While it does not reach temperatures cold enough to be called cryogenic, carbon dioxide snow is at the heart of a new way of dealing with unwanted pests. It utilizes a quick freezing process that takes advantage of the properties of carbon dioxide snow and has a number of benefits...
Cryogenic Finishing
The following 3 articles discuss the uses and procedures of various type of cryogenic finishing. 1) By Robin A. Rhodes, Cryogenic Institute of New England, Inc. rrhodes@nitrofreeze.com Cryogenic Deflashing is employed to remove undesired residual mold flash that remains on molded parts after they are removed or ejected from the...
Convert PSI or Torr to Degrees Kelvin?
When using helium vapor bulbs under 30K, what is the formula to convert from PSI or Torr to degrees Kelvin?
Searching for a company to make a specific kind of cryogenic chamber
I am writing a proposal to do some deep space simulations of mechanical vibrations at cryogenic temperatures. For the research, I will need to obtain a chamber that has a space of approximately 1700 cubic inches (or a 12in. cube) that also has an optical viewing window.
Cryogenic cooling as possible treatment of aluminum parts for semiconductor industry
I’m interested in cryogenic cooling as a possible treatment of aluminum parts for the semiconductor industry.