The increasing thermal requirements on a building´s surface increase the thicknesses of insulation and therefore of the entire wall up to 60 cm and more. Tests during the last years to use vacuum insulation paneels in the building construction for reducting the insulant thickness however failed because of the fact that it was not possible to fix this high-performance heat insulator to the surface areas of building parts. A further obstacle is the still high price per m². In addition all the fitting pieces are special productions impeding the efficient use of this technology in construction further on.
On the basis of a bivouac-box, project b1, all the development and calculation have been simulated. This box has been designed for a total weight of 2300 kg. Thus granting that in case of a realization the box may be transported by helicopter. The used new insulant technologies, applied for patent, (3 D roof system and mechanic attachment of the vacuum insulant), should be tested in a further step under extreme conditions like heat, cold and humidity for their capability in practice.
Objective of research workis the development of a mechanical attachment system for vacuum insulation panels. This system shall be used in new building as well as in sanitation independent of the building`s size and form. All types of façade design shall be enabled. At the same time a composite construction will be developed making unnecessary the fitting pieces for vacuum insulating panels and reducing the share of vacuum insulation panels by a middle U-value of 0,15 W/m²K at the wall piece reduced to 55%.
Method of processing
By means of simulating programs (WAEBRU, Euro-WAEBED and GEBA) the bivouac box and the building part constructions have been developed and tested for application in practice.
Project b1, documented in the report, has been designed for the site Schiestlhaus on the Hochschwab. The climate data are arithmetic values from Dr. Klaus Krec. The information of the block wood panel and the vacuum insulation panel, further named VIP, come from Fa. Auer Holzbau and Fa. Microtherm England.
The mechanical fastening system, applied for patent, for the first time enables to fasten a double-ply mechanic attachment for VIP to building part`s surface area and to provide them with any façade (plaster, metal, wood, etc.).
By the special arrangement of the particular high-performance insulant panels (in accordance with invention) building hydraulic proof was produced, that under inclusion and creation of stationary air space in the panel gap (cemented air interspaces) middle heat passing values are only insignificant worse than a patched construction with all therefrom resulting disadvantages in construction practice (low transversal strength of foil compound, not any more recyclable and replaceable etc.).
To further raising the vacuum insulation`s capability in practice has been developed a composite construction of VIP and marketable PUR-panels covered with aluminium. All the fitting pieces are produced from this conventional insulant and covered in the second layer with vacuum insulant panels. Thereby the thermal bridges are purposefully unarmed. The costs are reduced by this measures and the handling on the building site is simplyfied (ending of special formats of the VIP). With significant less than ten different ample VIP´s 90% of all ranges of application in building construction can be met. Total Insulation thickness of 5 cm enable U-values of 0,15 W/m²K with only 20 cm of total construction part thickness ( instead of previous usual 60 cm).
Comparative calculations with conventional wall constructions at a 230 m² single family house have shown that the combination of VIP and PUR-panels concealed with aluminium presents the, with distance most economic solution, taking the profit of usable floor space into account. In connection the 3 D roof system, also applied for patent, (reactive 2-component bitumen mass combined with VIP), it is possible now to efficiently insulate the whole building construction with high-performance heat insulators. How it is shown by the comparison an increase of usable living space and room height could be proved with building mass number of 15 % remaining the same.The calculated lifetime of VIP is approximately 100 years.
The mechanic attachment, simplyfied finish and maintanance possibility at any time will raise acceptance of vacuum insulation in new building as well as in sanitation.
First talks with processing industry and housing cooperations have confirmed the potential and market chances of this innovative technology.
|Project manager:||Otmar Essl
MAS Solar Ach.
gruppe blitzblau austria
Tel.: +43 699/1133 9140
Fax: +43 6232/6722
Mobil: 0676/70 17 357