DE102019120652A1 - ROOF ELEMENT FOR BUILDING ROOFS - Google Patents

Abstract

Roof element for building roofs, containing an elongated, extruded multi-chamber hollow profile, which is provided with an upper side, a lower side and side walls extending between them, with solar elements being provided on the upper side and at least one of the chambers of the multi-chamber hollow profile being designed as a cooling channel, the multi-chamber hollow profile in the area its underside and, if necessary, parts of the side walls can be brought into operative connection with insulating means.

Description

The invention relates to a roof element for building roofs.

The DE 10 2007 027 984 A1 a profile made of a light metal material with at least one pipe element running on the profile for the transport of heat-carrying media on buildings has become known, the profile having a roof plate and foot profiles protruding from this on one side, delimiting a space between them and at least one inside the space Tubular element is formed on the inside of the roof panel.

The DE 10 2007 047 693 A1 discloses a facade or roof element for attachment to a building with an outer wall, an inner wall and with a thermal latent storage arranged between the outer and inner wall, the outer wall being designed as transparent thermal insulation and a fluid-carrying line being arranged in the latent storage . The latent storage comprises at least one thermally conductive, open-pored lightweight construction panel which contains a storage medium, preferably a phase change material (PCM), and wherein the lightweight construction panel is in thermal contact with the fluid-carrying line.

The CH 707930 B1 discloses a facade or roof element comprising one or more photovoltaic solar cells or modules. With the solar cells or modules, at least one thermally conductive layer is provided, which is designed to dissipate heat occurring in the solar cell or module or modules. Furthermore, thermal insulation is provided, which is arranged on the surface of the thermally conductive layer opposite the solar cells or modules.

The aim of the subject matter of the invention is to provide an alternative roof element that is simple in construction and can be used universally not only for new buildings but also for roof renovations.

In addition, a building roof containing such a roof element is to be provided.

Finally, a building is to be provided which is provided with a building roof of this type, comprising a plurality of continuous roof elements that are operatively connected to one another.

This object is achieved by a roof element for building roofs, comprising an elongated, extruded multi-chamber hollow profile which is provided with an upper side, a lower side and side walls extending between them, with solar elements being provided on the upper side and at least one of the chambers of the multi-chamber hollow profile being designed as a cooling chamber The multi-chamber hollow profile can be brought into operative connection with insulating means in the area of its underside and, if necessary, also parts of the side walls.

Advantageous further developments of the roof element according to the invention can be found in the associated subclaims.

The object is also achieved by a building roof covered with roof elements according to one of claims 1 to 18.

Finally, the object is also achieved by a building, in particular a warehouse, provided with a building roof according to claim 19.

The building is advantageously provided with at least one storage facility for the electricity generated by the solar elements.

The multi-chamber hollow profile can consist of aluminum or an aluminum alloy.

Alternatively, there is also the possibility of using a plastic profile, in particular made of thermoplastic materials. In plastics processing, the term extrusion is known as extrusion.

In general, the term extrusion belongs to pressure forming according to applicable standards. The advantages of extrusion are, in particular, the possibility of producing profiles in complicated shapes. The extrusion is usually used to produce continuous material that can be cut to the desired length if necessary. Thus, roof elements can be generated in the subject matter of the invention, which are adapted to the respective length of the building roof to be covered with them. Building roofs can be horizontal or inclined.

The top of the roof elements that are used and can be detachably connected to one another by a plug connection, for example, is covered with solar elements. Here, the solar elements can be detachably connected, if necessary, by screwing them to the surface of the respective roof element, if necessary over its entire length.

Alternatively, there is also the possibility of applying the solar elements to the top of the roof elements by gluing.

Bifacial PV solar cells should preferably be used as solar cells. Bifacial solar cells are double-sided cells that can use the incident light not only from the front, but also from the rear. A second pane of glass on the rear side of the module ensures that indirect light through reflected sun rays reaches the cells from behind. Alternatively, this effect can also be produced by the bare surface of the extruded aluminum profile, so that the glass pane can be dispensed with. Through this measure, the respective module achieves a higher level of efficiency.

Various measures can be taken to dissipate the heat that is used below the solar cells.

One measure is seen in the form of heat conducting plates formed on the multi-chamber hollow profile, which are preferably arranged in that chamber of the multi-chamber hollow profile used for cooling purposes.

Alternatively or in addition, pipelines can also be provided which are filled with a suitable coolant that is moved in a circulation process. If necessary, suitable heat exchangers or the like are used here.

There is also the option of providing a so-called latent heat storage (also phase change or PCM storage). Latent heat storage systems are characterized by the fact that they store a large part of the thermal energy supplied to them in the form of latent heat. Latent heat storage systems work by utilizing the enthalpy, the thermodynamic change in state of a storage medium. A common principle here is the use of the solid-liquid phase transition and vice versa.

In analogy to CH 707930 B1 the roof element according to the invention can be releasably or firmly brought into operative connection with insulating means in the region of its underside. If necessary, the insulating means can fill at least one of the chambers of the multi-chamber hollow profile.

If stronger insulation is desired, a correspondingly thick insulation layer can also be provided on the underside of the multi-chamber hollow profile, if necessary.

In order to be able to ensure optimal heat dissipation from the area of the solar elements, an active control of the cooling is provided.

As already mentioned, the same can be perceived through the cooling channels with a suitable coolant.

In addition, air cooling can alternatively or additionally be used, a controllable flap being provided at least in the area of one of the ends of the roof element.

To cover a building roof in a horizontal or inclined form, a plurality of roof elements corresponding to the respective area of the building roof to be covered are brought into operative connection with one another in a detachable, in particular pluggable form. The respective plug-in or click connection is to be designed in such a way that no water can enter between the individual roof elements after the respective building roof has been occupied.

Roof elements according to the invention can thus already be provided with corresponding active or passive cooling systems, the solar cells and the thermal insulation at the factory, so that the roof element can then be installed on the construction site without problems.

Each roof element has a groove at least in its lower section. Suitable fastening means, e.g. gutter profiles, can be inserted here and thus detachably connected to the respective roof element.

• - Luft- und/oder Wasserkanäle eingebracht sind,
• - Solarelemente vorgesehen sind,
• - eine Wärmedämmung gegeben ist.

The roof element according to the invention forms a multifunctional roof element in which

• - Air and / or water channels are introduced,
• - solar elements are provided,
• - there is thermal insulation.

• - Entfall von Mittelfetten, Sparren, Konterlattung, Unterspannbahnen, Dachpfannen,
• - Eliminierung der Gefahr von Sturmschäden,
• - Reduzierung des Montageaufwandes und der Montagezeit.

The following advantages are given compared to conventional roofs with tiles:

• - Elimination of central greases, rafters, counter battens, underlays, roof tiles,
• - Elimination of the risk of storm damage,
• - Reduction of the assembly effort and assembly time.

• 1 Prinzipskizze eines geneigt verlaufenden Gebäudedachs, belegt mit erfindungsgemäßen Dachelementen;
• 2a und 2b Unterschiedliche Darstellungen eines erfindungsgemäßen Dachelements im Querschnitt;
• 3 Räumliche Darstellung eines einzelnen erfindungsgemäßen Dachelements;
• 4 Räumliche Darstellung des Dachelements gemäß 3 in seiner Vorderansicht;
• 5 Räumliche Darstellung eines Teilbereichs des erfindungsgemäßen Dachelements mit angedeutetem gesteuertem Kühlsystem;
• 6 Prinzipielle Darstellung eines Gebäudes mit Wärmeleittechnik;
• 7 Prinzipielle Darstellung eines Dachelements.

The subject matter of the invention is shown in the drawing using an exemplary embodiment and is described as follows. Show it:

• 1 Basic sketch of an inclined building roof, covered with roof elements according to the invention;
• 2a and 2 B Different representations of a roof element according to the invention in cross section;
• 3 Spatial representation of a single roof element according to the invention;
• 4th Spatial representation of the roof element according to 3 in its front view;
• 5 Spatial representation of a part of the roof element according to the invention with indicated controlled cooling system;
• 6 Basic representation of a building with thermal conductivity technology;
• 7th Basic representation of a roof element.

1 shows a building roof as a basic sketch 1 , for example a hall roof, in an inclined shape. Purlins are recognizable 2 . Several roof elements according to the invention are also indicated 3 that are arranged side by side on the purlins 2 rest and are firmly connected to the same. A gutter profile can also be seen 4th that is in operative connection with the lower area 5 of the roof elements 3 stands. The length L. the roof elements used 3 corresponds to the desired length of the respective building roof 1 . The roof elements 3 are formed by elongated, extruded multi-chamber hollow profiles, which will be explained in more detail below. Every roof element 3 is with solar elements only indicated here 6 provided, which will also be explained in more detail later. The roof elements 3 consist in this example of an Al alloy and are designed as multi-chamber hollow profiles (extruded profiles).

Due to the high inherent stability, central purlins, rafters, counter battens, underlays and roof tiles are no longer necessary. There is also no need for a roof rack for solar mounting.

The 2a and 2 B show the roof element according to the invention 3 in cross section. The structure of both figures is identical, so that the same components are provided with the same reference symbols. The extruded roof element designed as a hollow chamber profile 3 should in this example consist of an aluminum alloy. The roof element 3 has a top 7th , a subpage 8th as well as side walls 9 , 10 , 11 on. The side walls 9 and 10 form the outer side walls of the roof element 3 . The roof element shown here 3 has four chambers 12 , 13 , 14th , 15th on. Depending on the application, more chambers can also be provided if necessary. On the surface 7th of the roof element 3 are bifacial solar cells in this example 6 glued. In 2a it can be seen that the chambers 14th and 15th with an insulating material 16 , for example styrofoam, glass or rock wool, PU foam or the like are filled, in particular foamed.

The chambers 12 , 13 form so-called cooling channels through which the solar elements 6 generated heat can be transported away directly or indirectly. In the roof element 3 are in the chambers 12 , 13 protruding heat conducting elements 17th molded. To several of the roof elements 3 To be able to position next to each other on the roof surface to be covered, the outer side walls 9 , 10 profiled approaches 18th , 19th so that the individual roof elements can be brought into operative connection with one another by means of a plug-in or click connection. As a result of the selected approach shape, it is avoided that entering water can penetrate the building roof. In this example both are at the top 7th as well as at the bottom 8th Grooves 20th , 21st formed, which can be used to accommodate, for example, gutters or the like. This is described in more detail in the following figures.

As already indicated corresponds to 2 B the structural design of the 2a . Another insulating body is indicated by dashed lines 22nd , the one with the bottom 8th of the roof element 3 connected is.

Alternatively, of course, the chambers could also be used 14th , 15th be provided in enlarged form. Such a measure makes sense when increased thermal insulation is required.

3 shows a roof element according to the invention 3 in a perspective view corresponding to the 2a or 2 B can be constructed. The chambers are recognizable 12 , 13 , 14th , 15th who have favourited Solar Bifacial Elements 6 as well as a gutter profile 4th as it was already in 1 is indicated. The gutter profiles 4th are over so-called gutter iron 23 held, which in turn (not visible here) in the grooves 21st ( 2a) are guided and attached.

Air ducts are only indicated 24 , the chambers designed as cooling channels 12 , 13 are in operative connection and are in operative connection, for example, with a heat exchanger or a heat pump.

4th shows the roof element 3 according to 3 in its front view. The gutter element is recognizable 4th including gutter iron 23 . Here is shown in more detail how the free end area 25th of the gutter iron 23 in the groove 21st the bottom 8th is led. Via fastening means not shown can the end area 25th in the groove 21st be releasably attached.

5 shows another example of a roof element according to the invention 3 in perspective view. The roof element 3 is - as described above - with bifacial solar cells 6 covered over a large area. The chambers are recognizable 12 , 13 , 14th , 15th . Alternatively to the 2a and 2 B is in the chambers 12 , 13 a pipeline system 26th integrally formed, which is used to hold and guide a coolant or PCM. The controlled cooling system introduced here can generate heat that is below the solar elements 6 arises, are discharged, which is explained in more detail in the next figure.

6 shows a building as a basic sketch 27 , including a building roof 1 , which is formed by a plurality of roof elements according to the invention strung together 3 . As in 5 shown include the roof elements 3 also here molded pipelines 26th that with a heat exchanger system 28 are in operative connection. Excess energy from the roof elements 3 can for example be a heating system 29 are fed.

7th shows a partial area of the roof element according to the invention as a schematic diagram 3 . To generate a controlled cooling of the solar elements, not shown here, the end area is in one 30th of the roof element 3 a controllable flap 31 provided around a hinge point 32 can be swiveled around partially or completely, so that an air flow can be generated that is adapted to the respective temperature below the solar cells. As already mentioned, the heated air can be made available to a heat exchanger or the like.

List of reference symbols

1

Building roof

2

Purlin

3

Roof element (multi-chamber hollow profile)

4th

Gutter profile

5

lower area roof element

6th

Solar element (bifacial)

7th

Top of roof element

8th

Underside of roof element

9

Side wall

10

Side wall

11

Side wall

12

chamber

13

chamber

14th

chamber

15th

chamber

16

Insulation material

17th

Heat conducting element

18th

profiled approach

19th

profiled approach

20th

Groove

21st

Groove

22nd

Insulating body

23

Gutter iron

24

Air duct

25th

End area of gutter iron

26th

Pipeline

27

building

28

Heat exchanger

29

Heating system

30th

lower end area roof element

31

controllable flap

32

Pivot point

L.

Length of roof element

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102007027984 A1 [0002]
• DE 102007047693 A1 [0003]
• CH 707930 B1 [0004, 0023]

Claims (21)

Roof element for building roofs (1), containing an elongated, extruded multi-chamber hollow profile which is provided with an upper side (7), an underside (8) and side walls (9,10,11) extending between them, with solar elements on the upper side (7) (6) are provided and at least one of the chambers (12,13) of the multi-chamber hollow profile is designed as a cooling channel, the multi-chamber hollow profile in the area of its underside (8) and, if necessary, also parts of the side walls (9,10) with insulating means (16,22) can be brought into operative connection. Roof element after Claim 1 , characterized in that the solar elements (6) are releasably connected to the top (7) of the multi-chamber hollow profile. Roof element after Claim 1 , characterized in that the solar elements (6) are connected to the top (7) of the multi-chamber hollow profile by gluing. Roof element according to one of the Claims 1 to 3 , characterized in that the solar elements (6) are designed as bifacial solar cells. Roof element according to one of the Claims 1 to 4th , characterized in that the solar elements (6) extend essentially over the entire length (L) of the upper side (7) of the multi-chamber hollow profile. Roof element according to one of the Claims 1 to 5 , characterized in that at least the chamber (12, 13) designed as a cooling channel is provided with integrally molded heat conducting elements (17). Roof element according to one of the Claims 1 to 6 , characterized in that at least the chamber designed as a cooling channel (12, 13) is provided with molded-on channels or pipelines (26) for receiving and guiding a coolant or PCM. Roof element according to one of the Claims 1 to 7th , characterized in that at least one further chamber (14, 15) is provided in the area of the underside (8) of the multi-chamber hollow profile for receiving the insulating means (16, 22). Roof element according to one of the Claims 1 to 7th , characterized in that the insulating means (22) can be releasably or firmly brought into operative connection with the underside (8) of the multi-chamber hollow profile. Roof element according to one of the Claims 1 to 9 , characterized in that a controlled cooling device for the respective cooling medium can be used to dissipate heat from the area of the solar elements (6) in the area of the associated cavity (12, 13). Roof element according to one of the Claims 1 to 10 , characterized in that controllable flaps (31) are provided in at least one of the end regions (30) of the multi-chamber hollow profile. Roof element according to one of the Claims 1 to 11 , characterized in that the multi-chamber hollow profile consists of aluminum or an aluminum alloy. Roof element according to one of the Claims 1 to 11 , characterized in that the multi-chamber hollow profile is made of plastic, in particular of thermoplastic materials. Roof element according to one of the Claims 1 to 13 , characterized in that the length (L) of the multi-chamber hollow profile corresponds essentially to the length of the building roof to be covered with it. Roof element according to one of the Claims 1 to 14th , characterized in that the respective multi-chamber hollow profile is provided with profiled attachments (18, 19) in the area of its outer side walls (9, 10) for detachably stringing together a plurality of roof elements (3). Roof element according to one of the Claims 1 to 15th , characterized in that the individual roof elements (3), viewed over their length (L), can be releasably brought into operative connection with one another by a plug-in or click connection. Roof element according to one of the Claims 1 to 16 , characterized in that the multi-chamber hollow profile is provided with grooves (21) for receiving fastening means, at least in the area of its underside (8). Roof element according to one of the Claims 1 to 17th , characterized in that the groove (21) for laying gutters (4) is provided in the lower end region (30) of the respective roof element (3). Building roof covered with roof elements (3) according to one of the Claims 1 to 18th . Building, in particular warehouse, provided with a building roof (1) Claim 19 . Building after Claim 20 , equipped with storage means (28) for electricity generated by the solar elements (6).

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