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Scientists Elucidate Heat Flows in Liquid Hydrogen Tanks

Hydrogen has been touted as the fuel of the future, but challenges remain in improving the storage efficiency of liquefied hydrogen fuel for large scale commercial transport and storage. Researchers from South Korea have conducted experiments and simulations to investigate the heat flows and phase changes within a cryogenic fuel...

Tackling the Rapidly Expanding Hydrogen Power Industry

PBS Velka Bites has been in the cryogenic business for more than 35 years. Today, its cryogenics engineering capabilities include everything from preliminary calculation through design, manufacturing and assembly, to testing and user optimization of its cryogenic products. Since the late ’80s, PBS has been developing and supplying cryogenic turbines...

Understanding the Origin of Matter with the CUORE Experiment

The Cryogenic Underground Observatory for Rare Events (CUORE) can search for these rare NLDBD processes using different nuclei. Scientists rely on complementarity among searches using different nuclei to have a better understanding of the underlying physics in the process. Complementarity in physics involves theories that contrast with each other but...

How the SpaceX Explosion Would Have Been Different in Florida

Shortly after SpaceX’s massive Starship launched from Texas on its first full test early Thursday, the 400-foot stack of hardware began to tumble until it broke apart in a fiery explosion over the Gulf of Mexico. The overall demonstration mission – a test of the new rocket’s ability to ignite and clear the pad’s 500-foot tower...

Svanehøj Acquires Complete Cryogenic Services

With its third company acquisition in just over two years, marine pump specialist, Svanehøj, continues to expand its service solution business, this time by taking over California-based Complete Cryogenic Services (CCS), a specialist in service and overhaul of submerged pumps on LNG tankers. The number of LNG tankers globally has grown...

Skyroot Aerospace and Dhawan-II’s More Powerful 3D-Printed Cryogenic Engine

In 2020, the world was introduced to Dhawan-I, a 3D printed cryogenic engine made by Skyroot Aerospace. Three years later, the Indian company has been working on a more powerful model, unveiling to the public the new and improved Dhawan-II, which is said to have successfully completed testing. Like its predecessor,...

Latest in Defining Cryogenics

Regenerators

Regenerators or regenerative heat exchangers are a key component of cryocoolers such as pulse tube cryocoolers (Cold Facts, August 2014). Regenerator performance greatly affects the coefficient of performance of cryocoolers. Improvements in regenerator design and, in particular, regenerator materials have been an important factor in the improvement of the performance...

Pulse Tube Cryocoolers

The development of pulse tube cryocoolers has been a significant topic of research and development over the past 20 or so years. Pulse tube cryocoolers have a number of advantages over other types of cryocoolers and are now available commercially. In order to understand pulse tube cryocoolers, it’s best to...

Thermal Expansion

Thermal expansion refers to the change in size (length or volume) that a material undergoes as its temperature changes. In cryogenic systems this effect can be quite large and must be allowed for in the design. In isotropic materials, which include most engineering materials, the thermal expansion is the same...

Latest in Cryo Central

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...

Latest in Ask the Experts

TS diagram for helium

Where can I obtain a really big, nice TS diagram for helium ?

Reliability and mounting of electronic substrates at low temperatures

I am currently working on the design of a focal plane assembly to be implemented on a small satellite (4 EMCCD detectors) to be operated at -80°C (which is not really cryogenic and likely still considered boiling hot for most of you :-). As it is passively cooled, the assembly...

Are 3D drawings included in the sale of a cryogenic plant?

I have a question concerning the 3D drawings of a cryogenic plant. The integration of the 3D drawings of a plant with the 3D main model of a new laboratory or a new facility can be a complex work that takes a lot of time. I would like to know...

Looking for a source of LOX impact testing to ASTM D2512

I have been looking for a source of LOX impact testing to ASTM D2512. I am aware of NASA and White Sands, but am looking for a commercial entity doing the work. No luck so far, even calling a lot of the folks on the CSA website. Any referrals will...

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