NL2008160C2 - ELEMENTS THAT MAKE USE OF AIRFLOW ALONG BUILDINGS TO DRAIN IRRADIATED SUN HEAT THROUGH THE SPOW. - Google Patents

Abstract

The invention relates to an outside wall cladding element for fastening on a wall (1), comprising a fastening system (3), outside wall cladding material (4) and an outside wall element having one or several openings which form a passage from the open air to a cavity which is formed between the outside wall cladding material and the wall, characterized in that the openings are slit-shaped and the outside wall element comprises a venturi element (7). The slit-shaped ventilation openings are provided with venturi elements which make efficient use of an air flow along the outside wall and the air pressure on the outside wall (7). Air flowing past improves the ventilation in the outside wall and dissipates heat from solar radiation via the cavity. The heat which is dissipated via the cavity reduces the temperature of the outside wall cladding materials and therefore does not contribute to heating up the inside of the building.

Description

Elements that use the air flow past buildings to dissipate radiated solar heat through the cavity.

5 Area:

This invention is related to elements that are mounted on or on buildings or elements that are integrated into facade materials. With these elements, the kinetic energy of air flows past buildings is converted into usable air flows. A preferred application of these elements is the use of these elements to dissipate the energy of solar radiation from the cavity of the facade, thereby reducing the energy consumption for cooling the building. The principle of these elements can also be applied, for example, to support the ventilation of the building, to cool photovoltaic elements, to harvest thermal energy, to generate electrical energy or for other applications that use air flows around buildings.

Background: 20 The physical benefits of ventilated facades are generally accepted. A ventilated façade consists of an inner shell on which insulation materials and vapor-open or vapor-retardant films are applied as required. This assembly is further referred to as the inner construction. Façade materials are installed for this interior construction. A ventilated cavity is normally provided between the inner construction and the facade materials. The air in the cavity is in open connection with the outside air. This cavity therefore allows a ventilation in the facade construction. Fresh outside air can move freely through the cavity and thereby remove moisture from condensation or inside leaked rain or inside leaked cleaning liquids in the form of vapor. The building physical advantage of this ventilated cavity is determined in particular by the drying effect of the ventilation air. Water and moisture that has penetrated into the interior through condensation, diffusion, cleaning or rain can be removed by the ventilation air after evaporation. In this way, even with small leaks or slight condensation problems, an accumulation of moisture in the facade can be prevented.

2

When designing a ventilated façade, it is important that the size and placement of the ventilation openings in the façade, the depth of the cavity, the fixings of the façade materials and the structure of the interior construction are well designed. Moisture problems may still arise with an improper design. For example, the local climate in which the façade is placed, the absorption coefficient for solar radiation of the façade materials and the orientation of the façade play a role in these building physical processes.

In many cases an improvement of the ventilation in the cavity will lead to an improvement of the lifespan and the performance of the entire façade construction and thus to an improvement of the performance of the entire building.

The disadvantage of the free air flow in the cavity is that in the event of fire, oxygen and hot gases can be transported through this cavity. Jan van den Akker has described in DE4036865 how fire behavior can be improved by closing the cavity in the event of a fire. DE4036865 describes elements that inhibit the air flow in the cavity in the event of a fire. This solution has not found a broad application due to the increased facade costs, the difficult assembly and the lack of evidence that the elements described still provide increased fire safety even after many years of use.

A facade receives at peak times up to around 1000 W / m2 of sunlight. Depending on the geographical location, the climate, the time of day, the orientation of the façade and shading by, for example, surrounding buildings and trees, a façade usually receives fewer, but still significant, amounts of solar radiation. This solar radiation is not completely absorbed by the facade. Part of the solar radiation is immediately reflected. Light colors usually reflect more than dark colors. Part of the solar radiation is removed by the wind and the free convection on the outside of the facade. However, part of the solar radiation is absorbed by the facade materials. On a sunny day, a façade can become warmer by around 40 degrees Celsius than the outside air due to this absorbed solar radiation. Since the heat flow through the facade construction to the interior of the building is proportional to the difference in temperature between the temperature in the cavity and the interior of the building, solar radiation on the facade leads to increased energy consumption for cooling the interior of the building.

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It should be noted that the higher the insulation value of the façade construction, the lower the energy flow to the interior of the building. Especially with well-insulated facades, the need for cooling will be less than with poorly-insulated facades.

5 The increase in energy consumption for cooling a building due to solar radiation varies, depending on a large number of variables, between 1 W / m2 and 300 W / m2.

A ventilated façade offers advantages over an unventilated façade because part of the solar energy that the façade materials absorb can be discharged through the ventilation air in the cavity. The air exchange in the cavity, which is created by wind and by free convection in the cavity, will dissipate part of the solar radiation. With a sunlit ventilated facade, the temperature in the cavity is lower than with an unventilated facade and therefore a building with a ventilated facade uses less energy for cooling than a building with an unventilated facade.

Because the ventilation openings in a ventilated façade are relatively small, often much less than 1% of the façade surface, and because the cavity with a normal cavity depth of 2 to 5 cm has a relatively high resistance to air flow, the contribution of cavity ventilation is for the heat dissipation in a ventilated facade is limited. As a result, the air in the cavity still warms up considerably when it is illuminated by the sun.

If the façade materials are mounted at a greater distance from the inner structure or if the façade openings are larger, there is less resistance to air flow and the temperature in the cavity will deviate less from the outside temperature in the shade. This then provides a reduced energy consumption for cooling the building. This configuration is not desirable because, for example, this leads to undesirably deep facades with high construction costs.

If facade elements are provided with photovoltaic functionalities, good ventilation is not only desirable to reduce the cooling load of the building, but also to reduce the temperature of these elements themselves. It is generally known that photovoltaic elements have a high absorption of solar radiation and that they have a lower energy efficiency at an elevated temperature. Cavity ventilation thus contributes to an increased electrical efficiency of the photovoltaic roof or facade panels. This effect on the photovoltaic efficiency is 4 independent of the insulation degree of the inner structure. This can only be related to the temperature of the photovoltaic elements themselves.

If photovoltaic elements are integrated into sloping or flat roofs, ventilation is also required. Not only to limit the cooling load of the building due to the dark photovoltaic elements, but also to reduce the temperature of these photovoltaic elements. Ventilation behind the photovoltaic elements mounted on a roof contributes to a higher electrical efficiency of these photovoltaic panels.

Many different methods are known for making useful use of the kinetic energy of 10 air flows. Most principles are based on the Bernoulli principles. A venturi, aerofoil and airplane wing are examples of elements that convert flowing air into directed air flows. These elements are often used to create a reduced pressure, but it is also possible to create an overpressure with these principles. By designing these elements in such a way that use can be made of the Coanda effect, the effectiveness of these elements can be further increased.

The conversion of kinetic energy from air flows into directed air flows with the help of a venturi has long been known. In US2005 / 0017514, Angus J. Tocher provides an overview of the use of this principle in engines, airplanes and in generating energy. He also describes the application of this principle when designing a machine with which wind energy can be converted into electrical energy.

In W02010 / 077150, Arvid Nesheim describes a similar machine with which wind energy can be converted into usable energy. His invention also makes use of pulse retention. He does not use venturi but aerofoil to harvest the kinetic energy of wind.

Angus J. Tocher describes the following advantages of using the venturi principle over the use of wind turbines for harvesting wind energy: • The machine is safe for humans and animals because it has no rotating parts.

• The machine makes few vibrations and makes few disturbing noises.

• The machine can use low to very high wind speeds.

5 • By choosing the dimensions properly, the machine can handle turbulent wind speeds well.

• The Tocher machine can be designed in such a way that it automatically turns towards the wind without assistance.

5 • The machine is cheap, robust and durable due to the lack of mechanical parts that are exposed to wind and weather.

In US20090060710, Gammack describes a fan that is marketed by the Dyson company under the name "table fan AM01 ™. This table fan is designed with an aesthetically appealing design that uses the Bernoulli law 10 to convert a small powerful air flow in a tube into a pleasant spatial air flow that serves to give rooms a lower feeling temperature. If wind blows freely through the annular opening of this fan in the right direction, an underpressure is created in the leg through which the air is supplied under normal use.

Roskey describes in US6239506 and US5709419 how wind energy plants can be designed that generate electrical energy with the help of the Bemoulli principles.

Nesheim describes in W02010077150 a wind power plant that applies the Bemoulli principles in an aerofoil arrangement to generate electrical energy.

Wight describes in US4963761 a wind power plant that can be integrated into the roof of a building to generate electrical energy.

Purpose The purpose of this invention is to design elements that can be used to apply the Bemoulli principles to convert the air currents around buildings into air currents that contribute to increased ventilation in the cavity, improved building physics and a reduced cooling load off the building. In addition, these air flows can contribute to an increased electrical efficiency of 30 photovoltaic modules mounted on or on the building by cooling them. By combining the elements with valves such as, for example, valves that control and close the air flow in the cavity as desired, the fire safety of ventilated facades can be increased. Optionally, the created air flow 6 can be used for other applications such as, for example, contributing to the ventilation or heating of the interior of the building or for generating energy. The energy can also be stored in the discharged air for use at times when the building has a heat demand.

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Advantage of the invention

A judicious application of this invention will lead to reduced energy consumption for cooling a building exposed to solar radiation and to increased fire safety. It is possible with this invention to reduce the energy consumption of fans in the building, to increase the electrical efficiency of photovoltaic elements and to reduce the energy consumption for heating the building.

15 Detailed description

For buildings with flat roofs, there is often a high air speed at the edge of the roof. Regardless of the exact wind direction, a high air velocity will prevail at the edge of the roof due to the shape of the building. It is therefore useful to install elements on the eaves that are shaped in such a way that passing air causes an overpressure or underpressure in these elements. When the Bemoulli principles are used, in a preferred embodiment an underpressure will arise in these elements. By connecting the underpressure in the roof edge elements with the air in the cavity of the facade, an underpressure will arise in the cavity of the facade. Because the façade cavity is ventilated, an air flow will arise in the cavity. The element on the roof edge will suck air out of the cavity. Fresh air is sucked into the cavity through the ventilation openings at other places in the facade, which air is led through the cavity to the venturi elements, whereby both moisture and unwanted solar heat can be removed from the facade. In this way, on a sunny day, warm air is drawn out of the cavity and replaced with cooler air, so that the energy consumption for cooling the building decreases.

Figure 1 shows an example of an element that uses the Bemoulli principle to extract air.

Figure 1 shows a simplified representation of a ventilated facade.

7

Number 1 is a simplified representation of the interior construction.

Number 2 is a simplified representation of the facade materials. Number 3 is a simplified representation of the cavity

Number 4 represents a bulge on the outside of the façade over which the air flowing past is accelerated, so that via the Bemouilli principles a local pressure is created that will suck air out of the cavity to dissipate heat. The thickening can be carried out both in point form and in longer strips.

Figure 2 shows a similar facade as in Figure 2. The bulge on the outside has now been replaced by a floor (number 5) in the facade surface. As a result, the speed of the air flowing past slows down and a local overpressure is created. In this way, outside air is blown into the cavity so that hot air is displaced from the facade construction through other openings.

Figure 3 shows a similar façade as in figure 1. Above the thickening, a plate is now mounted via local consoles (number 7) (number 6). This plate provides an improved speed increase between the plate and the thickenings and thus an increased suction effect of this element according to the Bernoulli principles.

Figure 4 shows a similar façade as in figure 1. A tube with openings facing the façade (for example, a gap or holes) is mounted 20 (number 9). This tube is in contact with the cavity of the facade via local channels (number 8). The air that flows along the tube is forced by a narrowing between the facade and the tube and thereby accelerated. The speed increase leads to a pressure reduction in the tube, which leads to a pressure reduction in the cavity via the local channels. This pressure reduction leads to improved ventilation of the cavity.

Figure 5 shows a similar façade as in Figure 1. The façade plating (number 10) has deformations that lead to an acceleration or deceleration of the air flowing past. The Bernoulli principle thus creates pressure differences over the surface of the facade. By making connections to the cavity at the location of the highest and / or the lowest pressures, ventilation in the cavity 30 can be promoted. Sloping the openings (high in the cavity, lower on the outside) can limit the rain.

Figure 6 shows an example of a non-return valve that can be used in a facade. A bullet (number 11) rests on a gasket (number 12). With an underpressure above the ball, the opening under the ball will be opened and air 8 can flow past. Without underpressure or with an overpressure above the ball, the ball will close the holes and no air can flow through the holes. This principle can be applied with balls or differently shaped shutters. It is possible to provide the shutter with shapes and aids that guarantee a long-term operation under extreme conditions, that open and close in the event of small pressure differences and that prevent the shutter from being permanently disturbed in storms, earthquakes or other extreme conditions.

Figure 7 shows an example of a non-return valve that can be used in a facade. A valve (number 13) rests against the facade materials. If the pressure 10 above the valve is lower than below the valve, the pressure difference will open the valve. The hinge (number 14) will contribute to smooth movement and prevent unwanted movements. If the pressure above the valve is lower or equal to the air pressure below the valve, the valve will close. This valve can be checked with springs and electrical control and adjusted to the wishes in the specific façade.

Wind flowing over a convex shape 1 will have a higher speed at the location of the bulge, resulting in a reduced pressure at this point. By making an opening to the cavity via this bulge, this reduced pressure can be used to forcefully change the air in the cavity.

20 If no special measures are taken, air will be sucked out of the cavity at times when there is no solar radiation on the façade but there is wind blowing along the façade. The outside temperature at these moments in the absence of solar radiation is almost the same as the temperature in the cavity. As a result, there is no net energetic effect on the cooling or heating load of the building. There will be an increase in the heat transfer coefficient between the inner structure and the cavity, but that effect is negligible compared to the total insulation value of the insulation materials in the inner structure.

It is possible to make the air flow in the cavity lockable or controllable with valves such as valves. The ventilation could hereby be reduced as desired and in the event of a fire the ventilation in the cavity can be completely closed off.

An element that works according to the Bernoulli principles has a self-locking principle. With a good design, the underpressure in the cavity will increase with increasing wind speed, but due to turbulence and other losses of efficiency, the underpressure in the cavity will never have to lead to unacceptably low pressures or high air velocities in the cavity even at high wind speeds. . Because the air speed on roof edges can fluctuate quickly and large air speed differences can occur locally on the roof edge, non-return valves can optionally be fitted in the elements to prevent "short circuits" in underpressure between the various openings in the elements. These non-return valves can be electrically or mechanically controlled, it is also possible to design the non-return valves self-regulating so that in the absence of sufficient underpressure the valves are closed. These non-return valves, just like the non-return valves in diaphragm pumps, can be self-regulating.

Although the eaves are a good place to place the Bernoulli elements, these elements can also be placed below or above window sections, below or above joints between sheet materials, vertically on building edges, on the roof or at any other random location on the facade or building placed. It must be ensured that the use of these elements does not lead to the sucking in or blowing in of unwanted quantities of rainwater or that these elements lead to an unacceptably increased mechanical wind load of the facade or roof on the structure with which it is mounted on the building. .

In a special embodiment, it is possible to combine the bernoulli elements with valves such as valves that control the ventilation flow in the facade and can close in the event of a fire. The valves can also be closed at times when solar heat can make a positive contribution to the heating of the building. After all, on sunny but cold winter days, solar heat can be useful if the ventilation in the facade is limited. These valves can be non-return valves that prevent short-circuit flows between the different elements.

It is also possible to provide the openings of the bemouilli elements with intumescent foams that close the openings in the event of a fire.

In a special embodiment, it is possible to make an additional cavity behind the insulating materials, between the inner shell and the insulating materials, which allows an accelerated cooling of the building. With a cooling requirement of a well-insulated building, it is difficult to quickly dissipate the heat to a colder outdoor environment because the insulation materials make it difficult to escape energy. A ventilated cavity between the insulating materials and the inner shell switches off the operation of the insulating materials and thus enables faster cooling. This could, for example, be used as night cooling. When closing the ventilation in this cavity behind the insulation materials, the insulation materials can again perform the insulating effect.

In a special embodiment, it is possible to combine the Bemoulli elements with an electric fan which, in the absence of air flows around the building, ensures sufficient ventilation in the cavity. It is even possible to ventilate the cavity with only a fan and without using Bemoulli elements.

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Examples of application of the invention:

A number of examples of possible manifestations are described below. This list is not exhaustive. More embodiments are possible within this invention.

Example 1:

A number of mushroom-shaped venturi elements are placed on a roof edge, each with a space of 1 meter, which are connected to the cavity between the facade materials and the insulation materials. These mushroom-shaped venturi elements display great similarities in design with the elements shown in US4963761. Regardless of the wind direction, the wind creates an underpressure on the suction side of this element. With this underpressure, the air in the cavity can be refreshed and solar heat removed. Optionally, a valve such as a valve can be placed in the cavity of this facade, which valve is automatically closed, just like in DE4036865, or which can be controlled mechanically or electronically to prevent excessive underpressure during storms or to limit the spread of fire. This valve can be mounted on any floor height as required.

Example 2:

Under the window parts of a building elements are mounted that have great similarity in design to the elements drawn in US 6239506, characterized in that these elements are only a few centimeters high. Wind and convective air currents cause an underpressure in these elements that create an air flow and thus a drainage of solar heat from the cavity. Optionally, a valve such as a valve can be placed in the cavity of this façade, which, like 11 in DE4036865, is closed automatically or which can be controlled mechanically or electronically to prevent excessive underpressure during storms or to limit the spread of fire. This valve can be mounted on any floor height as required.

Example 3:

A number of units are mounted on the roof of a building that resemble the Dyson fan AM01 ™ from US20090060710 from Gammack in terms of design, with the difference that this unit is designed in a different size, for example much larger. In the case of wind, unlike the Dyson fan, an underpressure will arise in the central tube at the bottom of this unit. By mounting an air distributor and hoses on this central tube, suction air flows can be created at any location on the façade. In this way it is possible to also create ventilation under windows or lower in the facade. By allowing this unit to be sucked exclusively on the south and west side of the facade (in the northern hemisphere where most of the solar radiation from the south is to be expected), it is possible to gain maximum benefit from the morning sun for heating the building. This unit can be used for cooling the building in the afternoon and in the evening. By placing a valve such as a valve in the central suction pipe of these units or by placing valves in the individual hoses or pipes, the air flow in the cavity can be regulated as required in the event of a storm or fire.

Example 4:

A roof trim is placed on the roof edge of a building that has a design that is strongly reminiscent of an airplane wing pointing downwards. In this roof trim at the height of the thickening in this wing shape a slot is provided or holes are provided which are connected to the cavity behind the facade. Air currents on the façade that have a vertical component will create underpressure in the cavity with which solar energy can be dissipated. Optionally, the trim can be equipped with a system that closes the holes or the slot in the cavity at high temperatures, thereby increasing the fire safety of the building.

Example 5:

Above windows, an elongated element is placed in the awning with a design that strongly reminds one of an airplane wing pointing downwards. In this element a slot is provided at the height of the thickening in the wing shape or holes are provided which are connected to the cavity behind the facade.

12

Air currents on the façade that have a vertical component will create underpressure in the cavity with which solar energy can be dissipated. Optionally, the trim can be equipped with a system that closes the holes or the slot in the cavity at high temperatures, thereby increasing the fire safety of the building.

Example 6:

An elongated element with a design that is strongly reminiscent of an airplane wing pointing downwards is placed under window parts. A slot is provided in this element at the location of the thickening in the wing shape or holes are provided which are connected to the cavity behind the facade. Air flows on the facade that have a vertical component will create a vacuum in the cavity with which solar energy can be removed. Optionally, the trim can be equipped with a system that closes the holes or the slot in the cavity at high temperatures, thereby increasing the fire safety of the building.

Example 7: 15 An elongated element is placed at the level of storey floors of buildings with a design that strongly reminds of an airplane wing pointing downwards. A slot is provided in this element or holes are provided that are connected to the cavity behind the facade. Air flows on the facade that have a vertical component will create a vacuum in the cavity with which solar energy can be removed. Optionally, the trim can be equipped with a system that closes the holes or the slot in the cavity at high temperatures, thereby increasing the fire safety of the building.

Example 8:

A number of rotatable elements 25 are placed on the ridge of a sloping roof of a building, which design resemble the element described in Tocher US20050017514. In the vertical tube at the bottom of this element an underpressure is created in the wind along this element which can be led to a distribution element. Pipes are mounted on this distribution element with which air can be drawn from the cavity behind the photovoltaic elements, as a result of which a part of the sun-heated air can be discharged. A thermally expanding foam is mounted in the cavity behind the photovoltaic elements that closes off the air flow in the event of a fire and thus increases fire safety.

Example 9: 13

Facade panels are mounted on a ventilated façade, the façade panels having a bumpy surface texture that is reminiscent of a wavy water surface. Small openings have been made at the location of the valleys and at the location of the tops of the texture, which are connected to the cavity behind the façade panels. As a result of the Bemoulli effect, a small underpressure will arise at the location of the tops at an air flow along these façade panels and a small overpressure will occur at the location of the valleys. This will ensure improved ventilation of the cavity behind the wall cladding and thus an improved removal of solar heat from the cavity. Optionally, the joints between the plates are closed, so that the openings in the facade cladding represent the only supply and removal option for fresh air in the cavity. By providing the openings in the facade cladding with a thermally expanding foam or with intumescent materials, such as intumescent coatings, the openings will close in the event of a fire and thus contribute to improved fire safety.

Example 10:

Under the overhang of a roof edge, elements are placed on the various wind directions of the building that resemble the element in WO2010077150 in terms of its design. The elements are all connected to each other via a pipe system. Because the elements only have a suction effect when the wind blows from the right direction, it is necessary that non-return valves are placed behind the elements. This is to prevent that false air is returned by sucking the unfavorably oriented elements instead of air from the cavity. The connected units are connected to a pipe system that extracts air from the facade.

Example 11:

The joints are closed as much as possible in a ventilated facade. Ventilation air can only be supplied via the bottom and discharged via Bernoulli elements. The air to be supplied is passed through a cooled pipe system before reaching the facade. This tube system can for instance be cooled by an underground tube system or by a water body. A condition for a useful effect is that the cooled air has a lower temperature than the outside temperature. Example 12:

A unit is placed on the roof of a building which, in terms of its embodiment, resembles the unit as described in US20050017514, US6239506, US5709419, WO2010077150 or US4963761. This suction line of these units is connected to the ventilation ducts of the building. This arrangement makes it possible to significantly reduce the energy consumption of the fans in the building because the units contribute to the desired ventilation flows in the building.

5 Optionally, a drain can be installed to allow excessive suction in the event of a storm or for other reasons to limit ventilation. Optionally, an adjustable valve is mounted in the suction line of the elements. The elements enable an energy-efficient high air flow that helps with night ventilation.

Example 13: 10 A number of units are placed on the roof of a building that extract warm air from the facade. By passing the warm extracted air over a thermally insulated water tank, heat exchanger or system with phase change materials (PCM), the heat can be stored and, if desired, used later to heat the building via the ventilation system or the heating unit.

Example 14:

With a ventilated façade, a dark color with a high solar absorption is chosen for the top meters of the building. This will cause the facade to become very hot locally. This creates a convective air flow both on the outside of the façade material and in the cavity. These convective air flows reinforce the cooling effect of the Bemoulli elements. This effect has been known since the time of the Romans and can be called a solar tunnel. In order to limit the negative effects of increased sun absorption, an increased thermal insulation value of the façade can be chosen at the location of the dark color.

Example 15: 25 For a slightly sloping roof, optionally with photovoltaic functionality, a construction is designed that makes it possible to blow or suck air between the roof surface and the insulation materials. A roof was fitted with Kingspan Energipanel ™ with elongated openings over the full length of the elements. By placing one or more elements on the roof that resemble the unit from US6239506 in terms of design, it is possible to suck the sun-heated air away from the roof and thus reduce the cooling demand of the building.

Example 16:

A fan is placed on the roof of a building that is connected to the cavity of the façade via a pipe or hose system. With high solar radiation, the fan is switched on to replace the sun-heated air in the cavity with cooler ambient air, thereby reducing the energy requirement for cooling the building.

Example 17: In a facade with facade cladding elements are placed in the joints between the individual panels that have a shape such that when air flows outside the facade surface, underpressure or overpressure is created in these elements. Because these elements are in direct connection with the cavity of the facade, air movements occur in the cavity with which warm air can be discharged.

Claims (24)

1 Façade covering element consisting at least of an inner wall, a cavity with a depth of at least 2 centimeters, ventilation openings, a fastening system, façade covering material and a façade element with one or more keyhole openings that provide a passage from the outside air to the cavity, characterized in that this façade element has the external shape of a venturi element. Facade cladding element as in 1, characterized in that the facade element has a convex shape at the location of the key-shaped opening. io 3 Façade covering element as in 1, characterized in that the façade element is integrated in a roof trim. Facade cladding element as in 1, characterized in that the facade element is integrated in a water hammer or leak sill. Façade covering member as in 1, characterized in that the façade element is installed in a joint between façade covering materials. Facade cladding member as in 1, characterized in that the facade element is formed from wall cladding materials. Facade cladding member as in 1, characterized in that the facade element is formed from aluminum, stainless steel, coated steel, plastic or composite material. Façade covering member as in 1, characterized in that the façade element has a hollow shape at the location of the key-shaped opening. Facade cladding element as in 1, characterized in that the facade element is integrated in a solar panel. 25 Facade cladding member as in 1, characterized in that the façade element contains intumescent or heat-foaming components. Facade cladding element as in 1, characterized in that the facade element comprises a valve. 12 Façade covering member as in 12, characterized in that the valve 30 is adjustable. Facade element as described in claim 1, characterized in that it comprises non-return valves. Facade element as described in claim 1, characterized in that a leak sill is placed above the passage. Facade cladding element as in claim 1, characterized in that the facade materials have a texture with openings with the shape of a venturi element Facade element as in 1, characterized in that the openings have a cross-section 5 that is smaller than 1 cm. 17 Façade covering element as in 1, characterized in that the façade covering materials consist of HPL compact, steel, aluminum, aluminum laminate, composite material, glass or ceramic materials. 18 Facade element as described in 1, characterized in that these are installed below and below windows. Façade covering member as in 1, characterized in that an electrically driven machine for moving air is connected to the air in the cavity. Facade element as in 1, characterized in that it is integrated in sun protection. 21 Facade element as in 1, characterized in that it is integrated in a window frame. 22 Facade element as in 1, characterized in that it is integrated in the joint between facade materials. 20 Facade element apparently intended for the manufacture of façade covering member as described in claims 1-13. A method for applying a wall cladding member wherein the wall cladding member is as described in claims 1-14.