Air Products and Chemicals, Inc.

Apd Cryogenics, Inc.

Other

Longsworth, Ralph C.

Steyert, William A.

William A Steyert

Ralph C Longsworth

Guido Peter Pez

William N Lawless

Leslie E Cross

A counter flow heat exchanger comprising a plurality of tubes disposed in a bundle array or tube within tube configuration to enhance heat transfer between high and low pressure tubes in the array or tube in tube configuration. Also disclosed are a method of increasing the heat transfer capacity of a tube bundle heat exchanger and a liquid helium temperature refrigerator or a reliquefier utilizing the heat exchanger.

Parallel wrapped tube heat exchanger

A heat exchanger for a fast cooldown cryostat having high pressure and low pressure flow paths wherein a low pressure flow path is defined by a finely divided matrix which in turn defines a plurality of flow paths and said high pressure flow path is disposed in heat exchange relationshp to said matrix.

Heat exchanger for a fast cooldown cryostat

Fibrous material disposed in the Joule-Thomson orifice and/or the high pressure tube of a Joule-Thomson heat exchanger provides an effective flow restrictor in the orifice and means to prevent blockage because of contaminants in the fluid freezing and clogging the orifice. A Joule-Thomson device of this type can be fabricated for use as a cryostat to be disposed in confined space.

Joule-Thomson heat exchanger and cryostat

A counter flow heat exchanger comprising a central low pressure return tube deformed intermediate its ends to enhance heat transfer capability wrapped by a high pressure tube to conduct fluid to an expansion device. Also disclosed are a method of increasing the heat transfer capacity of a tube bundle heat exchanger and a liquid helium temperature refrigerator or a reliquefier utilizing the heat exchanger.

Hydrogen is stored at cryogenic temperatures by adsorption on porous carbon having a nitrogen BET apparent surface area above about 1500 m.sup.2 /g. Hydrogen can be adsorbed and desorbed in the context of a cryopump, having as the pumping element a panel, having large particles of pressed porous carbon thereon.

Method for adsorbing and storing hydrogen at cryogenic temperatures

A miniature apparatus for compressing gases is disclosed in which an elastomer disposed between two opposing electrostrictive or piezoelectric ceramic blocks, or between a single electrostrictive or piezoelectric ceramic block and a rigid surface, is caused to extrude into or recede from a channel defined adjacent to the elastomer in response to application or removal of an electric field from the blocks. Individual cells of blocks and elastomer are connected to effect a gas compression by peristaltic activation of the individual cells. The apparatus is self-valving in that the first and last cells operate as inlet and outlet valves, respectively. Preferred electrostrictive and piezoelectric ceramic materials are disclosed, and an alternative, non-peristaltic embodiment of the apparatus is described.

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Center Valley, PA, United States of America

William A Steyert