Two companies buy controlling interest in Acme Cryogenics
Gladstone Investment Corp., Acme Cryogenics' Senior Management Team, and Brant Point Partners bought controlling interest in Acme Cryogenics, Inc. from founder Roderic Fink.
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Praxair celebrates its 100th anniversary
Praxair, Inc. celebrated the 100th anniversary of its founding and its 15th year as a publicly-traded corporation on January 24, 2007.
Linde Hydrogen Center inaugurated in Munich-Unterschleissheim
The inauguration of the new Linde Hydrogen Center in Munich-Unterschleissheim in October marked Linde AG's commitment and support to a hydrogen economy.
Yoed Rabin leads cryosurgical research team
Carnegie Mellon University's Yoed Rabin is leading an interdisciplinary research team in developing a new computerized research tool to assist surgeons in planning cryosurgery.
NHMFL to build hybrid resistive/superconducting magnet
NHMFL has received an $11.7 million National Science Foundation grant to build an innovative, next-generation hybrid resistive/superconducting magnet that will potentially revolutionize a technique used to learn more about little-understood molecules.
Barber-Nichols celebrates its 40th anniversary
Barber-Nichols celebrated its 40th anniversary with an open house for customers, employees, vendors and alumni.
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Two-Phase Flows
Two-phase flows are those flows in which there is a mixture of two physical states (solid, liquid or vapor). In cryogenic applications, such flows are almost always a mixture of a cryogenic liquid along with its corresponding vapor. A mixture of liquid helium and helium vapor would be a typical...
Supercritical Fluids
A supercritical fluid is defined as a substance whose temperature and pressure exceed those of its critical point. Every pure substance has a critical point that is defined in thermodynamic space by a critical temperature and a corresponding critical pressure. For example, the critical point for helium has a critical...
Brayton Cycle
The Brayton cycle is one of the many thermodynamic cycles used to generate cooling at cryogenic temperatures. Strictly speaking, when referring to cooling we should call this the reverse Brayton cycle as the original Brayton cycle describes the process of power generation or propulsion via a gas turbine. In many...
Food Processing
Cryogenics and Food The industrial gas industry provides a host of products and services related to food. The various gases have useful and sometimes fascinating applications in food industry. “The food industry is not a homogenous industry. The needs of customers processing hamburger vs. poultry vs. strawberries vs. seafood, for...
Primary Standards
Elie K. Track Hypres, Inc. elie@hypres.com http://www.hypres.com/ Primary standards involve the exact definition and realization of units of measurement for various quantities, time, length, mass, voltage, resistance, current, etc. International agreements based on the latest scientific knowledge define those units, and their realizations vary depending on the unit itself. For...
Shrink Fitting
Robin A. Rhodes Cryogenic Institute of New England, Inc. rrhodes@nitrofreeze.com Shrink fitting, (or “compression fitting” as it is sometimes called), is a method used to insert a pin or bushing into a housing or other assembly requiring an extremely tight tolerance fit. It can be used as an alternative to...
Telecommunications
From the Winter 2004 issue of Cold Facts magazine The recent M-Calc IV — 4th Industry Assessment workshop discussing military and commercial applications for low-cost cryocoolers, held in November in San Diego, highlighted progress being made in cryogenics as applied in telecommunications. The reliability and long lifetime of projects now...
An Issue of Pressure and Flow Rate in a Supply Tank
Please help solve this problem: A supply tank requires a vaporizer to generate sufficient pressure to pump stored fluid up into a vehicle or tank. The available head is limited as the tank level falls and it is important to minimize the system pressure drop to maintain the desired flow...
Using MLI on VJ Line Joints or Cryo Storage Tanks
When installing Multi Layer Insulation (MLI) blankets on VJ line joints or cryo storage tanks should they be wrapped and tied down tight or loose? These are usually pre-cut to size. Also should they have an access hole at the point of where the molecular sieve is installed to help...
Separated layers of ice over a pipe
I want to know that why there are different layers of ice over a pipe carrying a cryogenic fluid, each layer separated with clear marks / lines? What do these layers signify?