EVAPORATIVE HYDROPHILIC SURFACE FOR A HEAT EXCHANGER, METHOD OF MAKING THE SAME AND COMPOSITION THEREFOR

A heat exchanger/evaporator for transferring heat from a first heat exchange fluid to a liquid to be evaporated into a gaseous second heat exchange fluid that includes a thermally conductive element (30) separating a first flow path (34) for the first heat exchange fluid and a second flow path (36)...

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Bibliographische Detailangaben
Hauptverfasser:	MEISSNER, ALAN, P, PARKHILL, RICHARD, G
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OFGENERAL APPLICATION DIFFUSION TREATMENT OF METALLIC MATERIAL DYES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEAT EXCHANGE IN GENERAL HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT HEATING INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MECHANICAL ENGINEERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS WEAPONS
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Beschreibung
Zusammenfassung:	A heat exchanger/evaporator for transferring heat from a first heat exchange fluid to a liquid to be evaporated into a gaseous second heat exchange fluid that includes a thermally conductive element (30) separating a first flow path (34) for the first heat exchange fluid and a second flow path (36) for the second heat exchange fluid. A first surface is on the element (30) in heat exchange relation with the first flow path (34) and a second surface is on the element (30) opposite the first surface and is in heat exchange relation with the second flow path (36). A hydrophilic coating (50) is bonded on part of the second surface and includes a powder of nominally spherically shaped particles including nickel, chromium, aluminum, cobalt and yttrium oxide bonded together with a braze metal predominantly made up of nickel, chromium and silicon and diffused into the nominally spherically shaped particles and the second surface. Also disclosed is a composition useful in forming a hydrophilic surface and a method of making a heat exchanger/evaporator. L'invention concerne un échangeur de chaleur/évaporateur permettant de transférer la chaleur d'un premier fluide de transfert de chaleur vers un liquide destiné à être évaporé pour former un second fluide de transfert de chaleur gazeux. Cet échangeur de chaleur comprend un élément thermoconducteur (30) formant une séparation entre une première trajectoire (34) de circulation destinée au premier fluide de transfert de chaleur et une seconde trajectoire (36) de circulation destinée au second fluide de transfert de chaleur. Cet élément (30) comprend une première surface assurant un échange de chaleur avec la première trajectoire de circulation, et une seconde surface opposée à la première surface et assurant un échange thermique avec la seconde trajectoire (36) de circulation. Un revêtement hydrophile (50) est appliqué sur une partie de la seconde surface et comprend une poudre composée de particules essentiellement sphériques contenant de l'oxyde de nickel, de chrome, d'aluminium, de cobalt et d'yttrium assemblés mutuellement au moyen d'un métal de brasage composé majoritairement de nickel, de chrome et de silicium, et diffusé dans les particules essentiellement sphériques et la seconde surface. L'invention concerne également une composition servant à former une surface hydrophile et un procédé permettant de produire un échangeur de chaleur/évaporateur.