Structural excitation for negative pressure
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 0.5 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, air evacuated sandwich walls long term insulate the difference between cold and hot areas *.
Nothing is as good as a nothing - so a vacuum.
Module frames are coated with galvanized sheets (or with glass panes) as panels. Sheet inside spread high-gloss aluminum foil is covered with acorrugated 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.
A central, readjusting suction pump, which periodically keeps the fields at ~ 0.08 bar vacuum, complete the setup. U-values of 0.8 W / m²K and more are thus achievable.
Cables and other installations can be inside the building integrated into own ducts.
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.
Carrying wall statics forming Exterior walls with only 8 cm and partitions under 4 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.
Defective individual fields are pneumatically separable by closable suction connection and ball valve built into each frame. They can be repaired - without negative pressure loss in the remaining building **.
Between laminated safety windows or laminated safety glass walls, a corresponding number of transparent acrylic spacers are placed on their surface. UV films can also 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 (15 kg/m²) 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 humidity and termite infestation.
Also they replace climate-problematic deficiency building materials, such as sand, cement and reinforcing steel!
Over the grouting of the modules by means of roof-silicone such a building is also quickly restructured. If necessary, it can easily be rebuilt elsewhere.
Especially for housing construction rebuildings after war damage, this structural approach gives low applicable areas 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
To the state of technology see too >>
auch: Pilkington-Specia, Nippon Sheed Glass u.a.
* These wall parts (modules) break sound and electromagnetic radiation waves, and even a lightning strike can not penetrate.
** If a module implodes, the inward force of only 0.08 bar vacuum is released. Earlier TV heavy vacuum picture tubes made of glass stood as a real potential and far greater source of danger in our living rooms. The 2 x 4 t per m² of pressure on the module could tear both sheets with a loud bang, but very rarely hurt a person.
* * * * *
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