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Este coeficiente varía con las condiciones … Este coeficiente varía con las condiciones del material (humedad que contiene, temperatura a la que se hace la medición), por lo que se fijan condiciones para hacerlo, generalmente para material seco y 15 °C y en otras ocasiones, 300 K (26,84 °C). En el Sistema Internacional de Unidades (SI) se mide en vatios / (metro × Kelvin) (W/(m·K)), en kilocaloría / (hora × metro × kelvin) (kcal/(h·m·K)) en el sistema técnico, y en BTU / (hora × pie × Fahrenheit) (BTU/(h·ft·°F)) en el sistema anglosajón. (BTU/(h·ft·°F)) en el sistema anglosajón.
, El coeficient de conductivitat tèrmica és … El coeficient de conductivitat tèrmica és una característica de cada substància i expressa la magnitud de la seva capacitat de conduir la calor. El seu símbol és la lletra grega . Al Sistema Internacional d'Unitats (SI) es mesura en watt / metre × kelvin (W/(m·K)), en kilocaloria / hora × metre × kelvin (kcal/(h·m·K)), al i en BTU / hora × peu × Fahrenheit (BTU/(h·ft·°F)), al sistema anglosaxó. El coeficient de conductivitat tèrmica expressa la quantitat o flux de calor que passa a través de la unitat de superfície d'una mostra del material, d'extensió infinita, cares i gruix unitat, quan entre les seves cares s'estableix una diferència de temperatures igual a la unitat, en condicions estacionàries. Aquest coeficient varia amb les condicions del material (humitat que conté, temperatura a la qual es fa la mesura), pel qual es fixen condicions per fer-lo, generalment per material sec i 15 °C (temperatura mitjana de treball dels materials de construcció) i en altres ocasions, 300 K (26,84 °C).ó) i en altres ocasions, 300 K (26,84 °C).
, In heat transfer, the thermal conductivity … In heat transfer, the thermal conductivity of a substance, k, is an intensive property that indicates its ability to conduct heat. For most materials, the amount of heat conducted varies (usually non-linearly) with temperature. Thermal conductivity is often measured with laser flash analysis. Alternative measurements are also established. Mixtures may have variable thermal conductivities due to composition. Note that for gases in usual conditions, heat transfer by advection (caused by convection or turbulence for instance) is the dominant mechanism compared to conduction. This table shows thermal conductivity in SI units of watts per metre-kelvin (W·m−1·K−1). Some measurements use the imperial unit BTUs per foot per hour per degree Fahrenheit (1 BTU h−1 ft−1 F−1 = 1.728 W·m−1·K−1).it (1 BTU h−1 ft−1 F−1 = 1.728 W·m−1·K−1).
, Ouvrages, sites internet
* (en) Yeram Sar … Ouvrages, sites internet
* (en) Yeram Sarkis Touloukian, R. H. Powell, C. Y. Ho et P. G. Klemens, Thermal Conductivity - Metallic Elements and Alloys, vol. 1, IFI/Plenum Press, 1970 (ISBN 0-3066-7021-6, lire en ligne)
* (en) Yeram Sarkis Touloukian et Y. S. DeWitt, Thermal Conductivity : Nonmetallic Solids, vol. 2, IFI/Plenum Press, 1970 (ISBN 0306-67028-3, lire en ligne)
* (en) Yeram Sarkis Touloukian, P. E. Liley et S. C. Saxena, Thermal Conductivity. Nonmetallic Liquids and Gases, vol. 3, IFI/Plenum Press, 1970 (ISBN 0-3066-7023-2, lire en ligne)
* (en) Yeram Sarkis Touloukian, R. W. Powell, C. Y. Ho et M. C. Nicolaou, Thermal diffusivity, vol. 10, IFI/Plenum Press, 1974 (ISBN 0-306-67020-8, lire en ligne)
* (en) John R. Rumble (Directeur de publication), « CRC Handbook of Chemistry and Physics 102nd Edition Online » (consulté le 13 avril 2022)
* Marble Institute of America (deux valeurs sont données : les plus élevées et les plus basses)
* HyperPhysics, aussi d'après Young, Hugh D., University Physics, 7th Ed. Table 15-5. (les données de HyperPhysics devraient toutes être à 20C)
* Hukseflux Thermal Sensors
* Engineers Edge
* GoodFellow
* Physical Properties and Moisture Relations of Wood
* Conductivité thermique de l'air en fonction de la température : (en) « Air - Thermal Conductivity », sur The Engineering TollBox
* Thermal Properties - Silica Aerogels
* Machinery's Handbook - properties of materials p404
* (en) Greg Becker, Chris Lee, and Zuchen Lin, « Thermal conductivity in advanced chips — Emerging generation of thermal greases offers advantages », Advanced Packaging, juillet 2005, p. 2–4 (lire en ligne, consulté le 4 mars 2008)
* Frequently Asked Questions About Forest Lightning - Forest Fire in Canada - The Earth's Electrical Structure
* Alumina ( Al2O3 ) - Physical, Mechanical, Thermal, Electrical and Chemical Properties - Supplier Dat
* EngineeringToolbox.com
* Calcul de la conductivité thermique
* Portail de la physique
* Portail des sciences des matériaux
* Portail de l’énergiences des matériaux
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| rdfs:comment |
El coeficient de conductivitat tèrmica és … El coeficient de conductivitat tèrmica és una característica de cada substància i expressa la magnitud de la seva capacitat de conduir la calor. El seu símbol és la lletra grega . Al Sistema Internacional d'Unitats (SI) es mesura en watt / metre × kelvin (W/(m·K)), en kilocaloria / hora × metre × kelvin (kcal/(h·m·K)), al i en BTU / hora × peu × Fahrenheit (BTU/(h·ft·°F)), al sistema anglosaxó.eit (BTU/(h·ft·°F)), al sistema anglosaxó.
, In heat transfer, the thermal conductivity … In heat transfer, the thermal conductivity of a substance, k, is an intensive property that indicates its ability to conduct heat. For most materials, the amount of heat conducted varies (usually non-linearly) with temperature. Thermal conductivity is often measured with laser flash analysis. Alternative measurements are also established. Mixtures may have variable thermal conductivities due to composition. Note that for gases in usual conditions, heat transfer by advection (caused by convection or turbulence for instance) is the dominant mechanism compared to conduction.dominant mechanism compared to conduction.
, Ouvrages, sites internet
* (en) Yeram Sar … Ouvrages, sites internet
* (en) Yeram Sarkis Touloukian, R. H. Powell, C. Y. Ho et P. G. Klemens, Thermal Conductivity - Metallic Elements and Alloys, vol. 1, IFI/Plenum Press, 1970 (ISBN 0-3066-7021-6, lire en ligne)
* (en) Yeram Sarkis Touloukian et Y. S. DeWitt, Thermal Conductivity : Nonmetallic Solids, vol. 2, IFI/Plenum Press, 1970 (ISBN 0306-67028-3, lire en ligne)
* (en) Yeram Sarkis Touloukian, P. E. Liley et S. C. Saxena, Thermal Conductivity. Nonmetallic Liquids and Gases, vol. 3, IFI/Plenum Press, 1970 (ISBN 0-3066-7023-2, lire en ligne)
* (en) Yeram Sarkis Touloukian, R. W. Powell, C. Y. Ho et M. C. Nicolaou, Thermal diffusivity, vol. 10, IFI/Plenum Press, 1974 (ISBN 0-306-67020-8, lire en ligne)
* (en) John R. Rumble (Directeur de publication), « CRC Handbook of Chemistre publication), « CRC Handbook of Chemistr
, Este coeficiente varía con las condiciones … Este coeficiente varía con las condiciones del material (humedad que contiene, temperatura a la que se hace la medición), por lo que se fijan condiciones para hacerlo, generalmente para material seco y 15 °C y en otras ocasiones, 300 K (26,84 °C). En el Sistema Internacional de Unidades (SI) se mide en vatios / (metro × Kelvin) (W/(m·K)), en kilocaloría / (hora × metro × kelvin) (kcal/(h·m·K)) en el sistema técnico, y en BTU / (hora × pie × Fahrenheit) (BTU/(h·ft·°F)) en el sistema anglosajón. (BTU/(h·ft·°F)) en el sistema anglosajón.
|
| rdfs:label |
Liste de conductivités thermiques
, Coeficiente de conductividad térmica
, List of thermal conductivities
, Coeficient de conductivitat tèrmica
|
