Construction-technical stimulation for
Because of the unresolved environmental problems of cement production and when
mining the building sand, completely new approaches must be taken in the construction sector
In analogy to the functional principle of a thermos I suggest the construction of static load-bearing wall elements.
The vacuum foils used in space travel also replace the storage mass customary for buildings and all insulating material materials. In space, these films actually preserve much higher temperature differences than they do on Earth.
But our terrestrial temperature differences can be isolated in the construction sector for a long time, if - applied in sandwich modules - whose cavity is held in the wave-breaking nothing of a rough vacuum. The enclosed in the cavity vacuum allows the complete creation of well insulated buildings!
Before the construction manual follows, I would like to mention the other advantages of these vacuum modules:
# The load-bearing capacity of one covered with sheet metal wall element, even for multi-storey buildings.
# In this way, it is possible to prepare in rational construction planning and to build resource-saving and cost-effective.
# Considerable energy-cost savings in winter heating or in the summer room cooling.
# For housing construction after war damage or after disasters and for the migration housing needs this approach allows a cheap and quickly buildable structure. Prefabricated, extremely lightweight components can be delivered in a space-saving stacking. They can be handled load-bearing and even grouted from four or more people, even without a construction crane.
# By cutting open the elastomer joints, such a building is quickly dismantled. After that, it can be rebuilt elsewhere with the same kind of jointing. Also these substantially resistant buildings offer a high long-term benefit.
# Expensive later renovations, such as Plaster renovation by scaffolding, omitted in this construction. Only one protective coating is needed.
# The walls are non-flammable and protect against lightning, all types of radiation and possibly termite infestation. For the storm resistance of the buildings connections to the deep-anchored point foundations or possibly to the building basement are sufficient. This construction results in a high earthquake resistance and it does not allow wet walls. Furthermore, the walls provide good noise protection for the residents.
# The transportable and lightweight modules with only ~ 15 kg / m² in their transom construction result in a self-supporting building statics, which grants the respective architectural design wide scope. On the surfaces of the buildings and the inner walls, you can apply any decorative weather and light resistant lacquered designs.
# If the façade surfaces are covered with PV foil, this results in a completely energy-self-sufficient building, whose power surplus even provides a charging station for e-mobility!
# U-values of 0.03 W / (m²K) are - also for the windows and doors - easily accessible.
# The long-term vacuum diffusion reduction can be readjusted via the modular valve.
# With lightweight wooden staircases instead of solid concrete steps, a renewable building material is also the better choice.
# With this isolation method, applications on pipelines as well as industrial and transport containers are possible and useful.
# The biggest advantage, however, is the global CO² reduction, which can be achieved by a paradigm shift in the construction industry.
# This construction approach can already be implemented by medium-sized craft enterprises.
With regard to the state of the art:
Already similar imaginary and manufactured products of some manufacturers are offered on the Internet. These panels cost, due to the complex processes of their production, per m² up to 100.- €. But they offer no static function and are not tight in the long term or their vacuum can not be readjusted. Static wall modules are not yet evident on the market. However, windows are already available in vacuum design.
My approach published here is a license-free innovation and thus at the same time "state of the art" - ie an object that can no longer be patented.
How are these components manufactured?
The module frames are occupied on both sides with galvanized metal sheets or glass panes. The inside of the metal sheets are covered with aluminum foil laminated cardboard. The voids between the upstanding posts carry horizontal lines of one above the other corrugated cardboard strips which protrude into the wall depth. Each corrugated cardboard strip is left and right with its ends angled away attached to the posts.
Each corrugated cardboard strip contains a split bamboo rod of approximately 4 x 4 mm every 16 cm. This is simply inserted into one of the wave arcs.
The cardboard lines form separate compartments with a parallel distance of 16 cm. These compartments are split in height and depth with an additional diagonal cardboard insert so that the remaining module air can only circulate thermally in tight triangular spaces. For further reflection, these cardboard strips are laminated with an aluminum foil.
Jointly build wooden skeleton, cardboard strips and the split bamboo or simelar rods the external pressure, which will load after the construction direction on the air-evacuated module surfaces.
The well-dried stands, cross braces and horizontal woods are held in minimal contact with the sheet metal surfaces by means of 3 mm narrow triangular profiles made from split bamboo. This also minimizes thermal transfer there. Finally, each module receives a packet of desiccant (zeolite).
The module frames, as a weak point of the insulation effect, consist of zapon-lacquer-sealed, only 6 mm thick plywood - in the width of the respective wall thickness. A 1 - 3 cm wide recirculating rebate of the metal sheets is elastomerically conected to the frame edges of each module. Thus, both sheets form a 100% dense sandwich to the frame. The joints of two modules are additionally insulated with externally and / or internally applied 30 x 60 mm thick PUR foam strips.
Statically planned, about 8 cm thick walls, slender partitions and floor-supporting walls from ~ 12 cm are so produced. Floor, floor slab, flat roof and other roof forms as well as all doors can be produced in this technique. As a static load only fractions of common wall weights are to included in the calculations.
For thermal renovations of conventional buildings, extra-thin, custom-made panels - space-saving and free of problematic substances - can be used as exterior or interior insulation. A honeycomb structure made of cardboard - with in corner placed bamboo sticks - here creates the distance to the all around soldered together sheets.
All elastomer-sealed module panels are pumped via their ball valve - with a rotary vane vacuum pump - an atmospheric height-dependent negative pressure (~ 80 - 95%). This happens after the modules have been grouted to a finished construction. The long-term vacuum diffusion reduction can be readjusted to the modules via the ball valves. Re-pumping is controlled by the manometer and could also be done with a manual pump *.
Between window panes or entire VSG walls, a corresponding number of transparent or acrylic spacers are placed on their surface. Like the walls, the windows can also be readjusted via their ball valves. UV films can reflect the excess of solar UV radiation. Optionally, outside sunblinds can be adjusted to the desired temperature by the sensor.
Cables and other installations are laid in separate shafts.
Attempting to enter such a building without permission is no more difficult or easier than in a normal building, where a window or door is a weak point for entry. The ground floor façade can also be stably covered.
What does a m² wall cost in this design?
2 m² lacquered, galvanized sheet metal, 0.6 mm 50, - €
3 m² aluminum-laminated corrugated cardboard 12, - €
2 lm squad + 1 lm plywood + elastomer ~ 14, - €
Working time of prefabrication per m² ~ 22, - €
- "- at the construction site in about 17.- €
in total about 115, - €
With the certainly still rising costs for building sand is a turning point in our building practice unavoidable. A change from cement, sand, styrofoam and reinforcing steel to wood, sheet metal, glass and cardboard as well as applied PV films would be sustainable and overall highly desirable. Clay-fired bricks are not an unlimited building material.
Here are on offer my approaches to vacuum components and massive solar wall storage heaters - free from obstructive patents and licenses.
It is necessary to reduce the CO²-polluting cement production and the ecological consequences of the construction-sand-overexploitation.
The food chain of earthly life begins with the micro-diversity, which predominantly on sandy seabed has its basis
Time is running out!
* Should a module implode, the inward vacuum force of 0.08 bar is released. The 2 x 4 tons of air pressure on each module m² would press the sheets together with a bang - but they probably do not cause any personal injury.
* * * * *
With a technically similar approach, sunlit, massive outer walls are able to heat the rooms behind them with the stored heat radiation from free solar energy.
These walls are clad on the outside with glass and inside with sheet metal and form the basis for a vacuum-controlled heat storage. This installation can be done on almost any building as a retrofit.
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 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 because I can not afford the necessary capital myself.
Your experience would be useful in the cause, and I ask you to share it with me: email@example.com.
Please pass on the suggestions with the link www.tubewaysolar.at to those interested. THANK YOU
Copyright 2008, Graz, Austria - updated: Vienna, Okt. 2018