Apparatus and method for providing condensation-and...

F - Mech Eng,Light,Heat,Weapons – 16 – L

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F16L 59/14 (2006.01) B05B 1/00 (2006.01) F16L 53/00 (2006.01) F16L 59/16 (2006.01) F17C 13/10 (2006.01) F17D 1/05 (2006.01) G01J 5/02 (2006.01)

Patent

CA 2696611

Apparatus that prevents the buildup of frost or ice on plumbing in a cryogenic delivery system (10) and on cryogenically cold surfaces (14a) exposed to ambient air. The plumbing is sealed within a casing that includes a microporous membrane (14). A purge gas stream is fed into the casing at an effective pressure, causing the purge gas to diffuse through the microporous membrane (14) and prevent frost or ice formation on an exterior surface (14a) of the apparatus or around a cryogenic discharge nozzle (420).

L'invention concerne un appareil qui empêche l'accumulation de givre ou de glace sur les tuyauteries dans un système de distribution cryogénique (10) et sur les surfaces qui sont à des températures cryogéniques (14a) exposées à l'air ambiant. Les tuyauteries sont enfermées hermétiquement à l'intérieur d'une enveloppe qui comprend une membrane microporeuse (14). Un courant de gaz de purge est introduit dans l'enveloppe à une pression efficace, ce qui permet de diffuser le gaz de purge à travers la membrane microporeuse (14) et empêche la formation de givre ou de glace sur une surface extérieure (14a) de l'appareil ou autour d'une buse de décharge cryogénique (420).

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