Structural excitation for vacuum insulation modules
The fact that a tea or coffee in the pot does not cool for over 12 hours, together with an airtight, mirrored shell, makes the atmospheric negative pressure. That's why the thermos flask, designed by James Dewar in 1874, is so popular today. Already 2 - 3 mm are sufficient at wave breaking distance, for the separation of the temperature differences.
This principle can thus be applied to entire building creations!
According to this principle, hollow and air-evacuated sandwich walls insulate the temperature differences from cold to hot for a long time*.
Module frames are coated with galvanized, 1 mm thick sheets (or with glass panes) as panels. Sheet inside spread high-gloss aluminum foil is covered with a 3 mm-thick corrugated board location.
Prior to the elastomeric sealing of these wall modules, the statically planned uprights and frame timbers enter as well as large grid made of strong corrugated cardboard strips of a honeycomb lattice structure.
The honeycombs minimize the remaining convection of the residual air; and contain at the six corners and in the center half-cm² hardwood sticks as spacers. Both together distribute the forces of external pressure, which load on the surfaces of a module, on the linear and point contacts.
All cables and installations are pre-integrated in the design of a module.
A central, readjusting suction pump, which periodically keeps the fields at ~ 0.03 bar vacuum, complete the setup. U-values of 0.04 W / m²K are thus achievable.
Carrying wall statics forming Exterior walls with only 8 cm and partitions under 5 cm wall thickness are thus produced; Floor-bearing walls not less than 12 cm. Also floor, floor slab, flat roof and other roof forms are here isolated by vacuum volume.
For subsequent thermal building renovation even very thin, custom-made panels - space-saving and free of problematic substances - can be used as exterior or interior applied insulation.
The stands and cross members are installed in the intermediate wall vacuum area. The contact between wooden components and sheet metal surfaces is minimized by means of edge bridges or point contacts (as thermal bridges).
As a static load about 1 / 20th of the usual wall weight must be taken into account.
Defective individual fields can be pneumatically separated by the closure of in the frame built-in suction connections and then repaired, without taking the rest of the building insulation.
Between glass panes, a corresponding number of transparent acrylic spacers are placed on their surface. UV films here reflect the excess of solar radiation. Even outside sunblinds can control the desired temperature with auto-sensory control.
In this way, resource-saving, quick and extremely cost-effective construction and in the construction sector can be worked very efficiently. Finished with a heat exchanger and small additional air conditioner, a comfortable room climate as well as a low-energy building standard are already achievable.
These transportable and lightweight modules result in their stand construction, a self-supporting building statics, which also gives a great deal of flexibility to an architectural design.
Also, this type wall element construction in earthquake zones are safe. They are incombustible and safe from termites. And they replace the deficiencies: sand, cement and reinforcing steel !
The silicone jointing of the modules makes such a building quickly restructured. If necessary, it can easily be rebuilt elsewhere. Especially for the reconstruction of post-war damage, this results in a favorable scope of application.
With this method of insulation, of course, applications on pipelines as well as industrial and transport containers are possible. Also can be isolated with thin, custom-made plates for subsequent thermal renovations, free of problematic substances and very space-saving.
Already the energy-cost savings with daily heating or cooling of the rooms speaks for this construction method. In addition, the outer surfaces of the sheet metal - simply glued with PV foil - can result in a completely self-sufficient building.
To the state of technology see too >>
* These wall parts (modules) break sound and electromagnetic radiation waves, and even a lightning strike can not penetrate.
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With the same technical approach, massive outer walls located on the sunny side are able to heat the rooms behind with built-in thermal radiation.
These walls are clad on the outside with glass and inside with sheet metal and form the basis for a vacuum-controlled heat storage.
During the day - at normal pressure - the wall mass heats behind the glass. In the evening, the outer façade automatically adjusts to the vacuum insulation that was kept up during the day towards the inside of the room.
Now, distributed throughout the night, continuous heat dissipation in the spaces behind it is possible.
A (PV slats) sunblind placed on the outside prevents overheating or undesired warming of the storage wall by means of a thermo-control.
Both approaches can already be implemented in medium-sized craft enterprises.
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I could not test both approaches myself because of lack of funds. Your experience would be useful in the matter and solicit >> email@example.com. Please continue to link.
© 2008, Graz, Austria - aktualisiert, Vienna, January 2018