CERN marks latest milestone with ceremony
A brief ceremony in Geneva on November 7, 2007 marked the latest milestone for CERN's Large Hadron Collider (LHC), the world's most powerful particle accelerator.
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Two scientists join Argonne’s Center for Nanoscale Materials
Two scientists, Elena Rozhkova and Elena Shevchenko, have joined Argonne National Laboratory's Center for Nanoscale Materials.
AmSC and TECO-Westinghouse announce research joint venture
American Superconductor Corporation and TECO-Westinghouse Motor Company announced the formation of a research joint venture to develop high temperature superconductor (HTS) and related technologies for high-power, direct drive wind generators for offshore wind farms.
DNV approves FIBA for Manufacturer Certificate No. T-1142
Det Norske Veritas (DNV) has granted FIBA Technologies, Inc. approval of Manufacturer Certificate No. T-1142, which approves FIBA for the manufacturing of seamless gas bottles and pressure vessels of Class I and II. FIBA is one of only four companies in the world to be granted this approval.
Carl T. Johnson nominated for Administrator of PHMSA
Carl T. Johnson, former president of The Compressed Gas Association, has been nominated by President George W. Bush to be Administrator of the Pipeline and Hazardous Materials Safety Administration at the Department of Transportation.
James Fesmire gets promoted at NASA Kennedy
CSA Technical Director James Fesmire was recently promoted to the position of Senior Principal Investigator at the NASA Kennedy Cryogenics Test Laboratory.
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Cold Compressors
A common way to provide cooling below the normal boiling point of helium (4.2K) is to reduce the pressure above the bath of liquid helium, thus also reducing the bath’s equilibrium saturation temperature. For example, to produce a 1.8K bath of liquid helium, the saturation pressure has to be reduced...
Kapitza Conductance
Kapitza conductance refers to the heat transfer between a solid surface and a fluid that covers that surface. Fundamentally, it describes the inherent difficulty in transferring energy from a solid to the fluid covering the solid surface. This phenomenon was first observed by P. L. Kapitza in 1941 while studying...
Thermosyphons
A thermosyphon (or thermosiphon) is a device that transfers heat via natural convection in a fluid. The natural convection is driven by gravity with the colder, denser fluid flowing downhill and the warmer, less dense fluid flowing back up. Thus, thermosyphons connect an object to be cooled with a reservoir...
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...
Any experience with Tungsten or Tantalum metal springs in a low temp environment?
I would like to use metal springs made of Tungsten or Tantalum in low temperature environment. Does anybody have any experience with such springs? More precisely, I would like to make compression springs by rolling tungsten or tantalum wire on a rod. I expect that, typically, the spring constant will...
Standards & specifications for pipe & tube couplings
I am interested in finding out more about cryogenic applications and what standards, specifications and test methods (ASTM, etc.) are required for qualification of pipe and tube couplings.
Looking for a test house to test the static coefficient of friction under cryogenic conditions
I am looking to find a test house that is capable of testing the static coefficient of friction under cryogenic conditions. We can be flexible on most of the test parameters, including the test coupon configuration, but we’re looking for a test house that can provide the following test environment:...
Approximating pressure changes over time in cryogenic cylinders
I am an Air Resources Engineer with the California Air Resources Board (CARB). My senior management has asked me to investigate approximating pressure changes over time in cryogenic cylinders that contain LNG. So far, I have taken a stab at the problem, seeking to take a back-of-the-envelope approach (as directed...