Einfluss von Hohlräumen auf die Wärmeleitfähigkeit von ausgewählten Holzwerkstoffen für den Baueinsatz
| Author(s): |
Matúš Joščák
Walter Sonderegger Peter Niemz Thomas Schnider Reinhard Oppikofer Laura Lammar |
|---|---|
| Medium: | journal article |
| Language(s): | German |
| Published in: | Bauphysik, February 2012, n. 1, v. 34 |
| Page(s): | 32-37 |
| DOI: | 10.1002/bapi.201200005 |
| Abstract: |
Influence of the air cavities on thermal conductivity of selected wood based materials and their application for building industry.On selected wood-based materials (beech veneer, MDF and particle board), the influence of inserting air cavities on the thermal conductivity was investigated. For the tests, the particular boards (board thickness: 2.7 to 5 mm according to the material) were layered in multiple layers by varying the assemblies and using boards with and without cavities. Additionally, aluminium foils (low emissivity) were inserted to investigate the influence of heat radiation in the cavities. It can be stated that inserting air cavities (approximately 46 % of core material) results in a reduction of thermal conductivity up to 51 %. An additional insertion of aluminium foils perpendicular to the direction of heat flow reduces the thermal conductivity once more significantly (up to 64 %) due to a strong reduced heat radiation within the cavities. This is particularly pronounced in the constructions with larger air cavity thicknesses. Additionally, a proposal of a new product based on wood has been presented to develop the potential of inserting cavities for timber construction. |
| Keywords: |
timber construction heat conductivity thermal conductivity wood construction insulating materials air cavities air spaces new products degree of reflection energy saving
|
| Available from: | Refer to publisher |
- About this
data sheet - Reference-ID
10066753 - Published on:
05/09/2012 - Last updated on:
13/08/2014
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