METHOD FOR MAKING A QUASI INCOMPRESSIBLE PHASE CHANGE MATERIAL WITH LOW THERMAL CONDUCTIVITY, AND RESULTING PRODUCT
The invention concerns a method for making a quasi incompressible phase change material (PCM) having low thermal conductivity, the resulting products and their uses. The method consists in combining with a phase change material (PCM) in liquid state a thickening agent selected to reduce significantl...
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Sprache: | eng ; spa |
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Zusammenfassung: | The invention concerns a method for making a quasi incompressible phase change material (PCM) having low thermal conductivity, the resulting products and their uses. The method consists in combining with a phase change material (PCM) in liquid state a thickening agent selected to reduce significantly thermal convection, the formed material having, depending on the combinations performed, a gelled structure or a colloidal dispersed system. The PCM consists of a mixture of chemical compounds of the family of alkanes, paraffins, waxes, fatty alcohols, fatty acids and the like, and the thickening agent can be organic (aromatic ureas), organometallic (alkaline or alkaline earth soaps) or purely inorganic (silica, silico aluminates such as bentonite made oleophilic). The invention is useful for thermal isolation of containers or ducts, and in particular for thermal insulation of hydrocarbon ducts.
La invencion concierne a un metodo para elaborar un material de cambio de fase cuasiincomprimible (PCM) que tiene una baja conductividad termica, los productos resultantes y sus usos. El metodo consiste en combinar, un material de cambio de fase (PCM) en estado liquido, con un agente espesante seleccionado para reducir significativamente la termoconveccion, el material formado tiene, dependiendo de las combinaciones llevadas a cabo, una estructura gelificada o un sistema disperso coloidal. El PCM consiste de una mezcla de compuestos quimicos de la familia de los alcanos, parafinas, ceras, alcoholes grasos, acidos grasos y similares, y el agente espesante puede ser organico (ureas aromaticas) , organometalico (jabones alcalinos o alcalinoterreos) o puramente inorganico (silice, aluminatos de silicio como bentonita transformada para conferirle caracteristicas oleofilicas). La invencion es util para el aislamiento termico de contenedores o conductos, y en particular, para el aislamiento termico de ductos de hidrocarburos. |
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