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THERMAL CONDUCTIVITY OF THE REGENERATION WASTE TEXTILES USED TO THERMAL INSULATION

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Author(s): Gheorghe Horga | Mihaela Horga | Ioan Hossu | Dorin Avram | Florin Breaban

Journal: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork
ISSN 1843-813X

Volume: XIV;
Issue: 2;
Start page: 44;
Date: 2013;
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Keywords: thermal conductivity | textile fibers regeneration | consolidated textile layer | insulation of pipes | heat transfer.

ABSTRACT
This paper presents theoretical and experimental studies on the behavior thermal conductivity of textiles made from regeneration fiber used to make the shells for insulation of pipelines. Was investigated the behavior of textile fibers regeneration at densities, temperatures and different layer thickness, in two structures: material in the form of fibers in the form of flock, named blanket and textile material in the form of fiber layer consolidated named, no woven material.Measurements were carried out with modern equipment of high precision and standardized methods, in the laboratory LGCgELaboratoireGénie Civil et geo-Environnement, Université d'Artois, Faculté des Sciences Appliquées Béthune, France.Measurement of thermal conductivity is through "flow meter method" governed by ISO 8301: 1991“Thermal insulation - Determination of steady-state thermal resistance and related properties - Heat flux meter apparatus”. Flux meter method is based on determining unidirectional heat flow density, constant in time and uniform in space, which crossing simultaneous measuring the center of the test piece plane, between two flat surfaces isothermal, with temperatures set T1 and T2, such as T2< T1.Textile materials which have been tested, the layer obtained from regeneration fibers in the form of flock and the consolidated fiber layer used in the insulation thermic, may be a basic resource as the raw material which comes in large part from recycled textile and have thermal conductivity more little than 0,06 [W/mK].
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