DE2818474A1 - Solar energy conversion roof - with solar cells contained in individual tiles and coupled to bus bars (BR 21.8.79) - Google Patents

Abstract

A roof covering for the utilisation of solar energy consists of individual elements in the shape with the contours of an ordinary flat roofing tile which is laid in the conventional way on the roof laths. The exposed part of each tile is covered by a transparent pane and houses solar cells which convert solar radiation to electric current. The overlapping part of each tile includes grooves through which connecting cables can be led and coupled to a bus bar along the roof rafter. These tiles are inexpensive to produce and to install. They do not change the appearance of a roof and can be subsequently installed in existing roofs to replace the conventional tiles.

Description

"Roof cover, as well as the associated system or

Arrangement "The invention relates to a roof covering with built-in Elements that are used to convert the sunshades that have been radiated in or the radiated Sunlight are suitable in electrical energy. Werner relates the invention to associated arrangements or an associated system. for the exploitation solar energy to generate electricity by means of a roof cover are different Proposals known, but some of them are vulnerable in the structural design and also are complicated. In particular, these suggestions for building design, or the architectural design is not acceptable. You see relatively large panels in front of which there are electricity-generating elements. Such plates can be but not integrated into conventional roofs and therefore have a disruptive effect. you will be often not even from the building authorities because of this unsightly and annoying appearance authorized.

In contrast, the invention is based on the object of a roof covering of the type mentioned in such a way that they are at relatively low cost can be produced, a good and effective conversion of solar energy into electricity is achieved and one extensive adaptation to the usual architectural Design and appearance of tiled roofs allows, at the same time the associated Arrangement and installation of the roof cover can be carried out at low cost should, even when retrofitting to existing roofs. Finally, there is also a combination of means for converting solar energy in electricity with means for converting solar energy into warming aspired to a medium.

To solve this problem, the invention initially proposes that that the roof cover is designed as a roof tile, that the roof tile or one several of the elements mentioned and means for the transmission of the heat of the sonar and / or of sunlight au1 claus or the elements and that means for electrical Interconnection of the elements of a group of roof tiles are provided. That or the electricity generating elements, e.g., polycrystalline silicon, have a electrical line of e.g. 3V and 1 A per brick. With 1 m² brick surface you can So around 100 W of electrical power are created to drive a motor a pump, for charging a battery, for heating a boiler and the like can serve more. Roof tiles of this type are particularly advantageous for houses or house systems can be used that do not have a connection to the power grid, or where a backup power source is available in the event of a power grid failure should stand. As from the later Elaborate on in more detail the roof tile according to the invention can be produced at relatively low costs. The roofing tile can be laid by the roofer in the usual way, including on the battens of existing roofs. The connection of the electrical elements the brick. each other is possible in a simple manner from the j) axle chair. That same applies to the connection to a busbar or the like, which leads to a Battery, pump or the like leads. The aforementioned advantages are now with one Reached roof covering, which is designed in the shape of a tile, covering the entire surface or can only cover the partial area of a roof. She is different so far not of the conventional roof covering types and fits perfectly the architectural design of the house or of neighboring houses. she is can also be used successfully in smaller houses. The laying work The roofer deviates from the familiar laying work of conventional bricks not or only insignificantly, which is also cost-reducing. The roof tile can be made in the usual brick shapes such as beaver tail, alz, strand, pan and Pressed brick, as well as "monk and nun" should be executed. There could also be several bricks, z. P. arei brick, to be combined into a coarser, integral part, the thus it can be laid as one piece but the appearance of several, here three, bricks Has.

With a preferred embodiment of the invention it is proposed that the roof tile is hollow and that the top when installed Wall of the roof tile at least on part of their Transparent surface and that the element or elements are located within the hollow space and below the transparent surface. The almost unhindered by the transparent Solar energy flowing through the upper part of the wall is very efficient captured by the electricity-generating elements and converted into electrical energy.

However, it is also in the range according to a further embodiment the invention that the element, or the elements to be embedded in the material of the roof tile, z. B. vcm material of the roof tile to cast around, with dnr roof tiles as absorber works. It is also possible to have the element or elements in or on an absorber layer to be provided, which is located on the roof tile.

The roof tiles are usually made of a rigid material such as Clay, plastic, ceramic or the like. And because of their different Thermal expansions are laid on the battens in such a way that they move upwards and towards the Page can move relative to it. Therefore, according to another suggestion, are recommended of the invention for electrically connecting the electrical elements of a brick with the other tile flexible connection lines. The same goes for that electrical connection to a busbar or to a battery, one to be driven Engine and the like.

It is further proposed with a preferred embodiment of the invention, that the roof tile also has means for passing through and heating a gaseous or liquid medium. This gives you the opportunity to use the medium to absorb the sun's heat and store it in a storage tank, e.g. B. a Boller and by means of the electricity-generating elements, the desired electrical energy is supplied create, e.g. B. to drive an electric pump for circulation or transport of the medium. Such a combination is particularly recommended in cases where a power supply connection is not available or may fail. As far as the medium is liquid it can flow through the bricks in free fall without pressure. But it can also flow around with pressure within a closed system, whereby in or pipe sections exposed to the heat and carrying the medium on the bricks are located and the ends of these line sections connections, or Z circuit options to the other parts of the above System. The medium can be liquid, that is Water or a saline solution and the like. The medium can also be gaseous be e.g. B. Air to be heated from a warm air heating system. But instead of air, it could be another gas, e.g. B. a gas of high heat storage capacity can be provided. Despite these advantages of managing the medium in a closed system (such as a pipe or pipe system), the resulting additional costs are proportionate small amount. This will emerge from the later explanations in detail. In one In a closed pipe or line system, the medium can circulate under pressure. this is z. 13. Necessary for higher houses. The medium circulates practically lossless.

A roof tile of the type just described is also included of the electricity-generating elements with a relatively simple manufacturing process Effort and can be produced in the usual tile shapes mentioned (plain tile, etc.). The line sections can either be pipes laid in the brick or also Channels, bores, cavities or the like of the brick itself, the Brick itself can act as an absorber. As mentioned, the Iledium can be depressurized or with pressure from one brick into the other and from there into the entire pipe or Line system flow. These bricks according to the invention can also be used. one already existing or newly created battens are relocated according to the usual craft rules. The invention is therefore also particular in this embodiment for the design of existing houses and especially smaller ones Houses can be used and forms both the usual brick covering, which is architecturally not or only insignificantly different from the usual tile coverings than also the heat converter from the solar heat into the medium. It's a characteristic this invention that the brick is retained in its conventional form, So you adapt the olleKtortechnik to the roof tile technology, so that the roofer can work essentially as before.

The invention can also be used to provide basic heat in the water supply and the like to create.

Flexible connection lines with connections that are easy to manufacture, z. B. plug connections, ensure according to) a further proposal of the invention not just a quick and easy connection of the line sections of one Bricks to another, or from the bricks to the pipe or pipe system. they allow also the implementation of this connection work from the inside of the roof truss, there the pipes of the system and the connections of the bricks to the parts of the land or front edges of the bricks that are accessible from the roof truss. The same applies to the connection of the aforementioned electrical connection lines. This work can thus be carried out overall without risk and at relatively low costs. The flexibility of the lines enables the tiles to be moved towards one another, or to the roof structure without removing parts of the tiles or the pipe system to be damaged.

The arrangement of roof tiles on a house can be done with the invention therefore be so that the solar energy either only converted into electrical energy becomes, or else in electrical energy and at the same time in thermal energy one Medium, with both types of energy working together to operate an Elauses system can.

It is therefore also within the scope of the invention to have several different groups Provide roof tiles, the one group having only electrical elements and the other group electrical elements and means for converting solar energy in the heating of a medium possesses. After all, you could be a group of bricks, in which only a conversion of the sun's warmth in warming a Medium takes place. The existing roof tile groups can then can be functionally switched to a system, or act, whereby even in this bulging state, the electrical elements provide the possibility of Self-generated electricity creates independence from the power grid.

Further advantages and features of the invention are the dependent claims, as well as the following description and the associated drawings of the invention Refer to exemplary embodiments. In the drawings, which are essentially schematic shows: Fig. 1: A perspective view of a partial area of a brick according to the invention covered roof, Fig. 2: also in perspective an interior view of a roof structure it with bricks and switching arrangement according to the invention, Fig. 3: in a longitudinal section an embodiment of a brick according to the invention, Fig. 4: and 5 others Design possibilities of a brick in longitudinal section, FIG. 6: one possible embodiment the supply line in the brick according to a section along the line VI-VI in Fig. 1, Fig. 7 and 8, in cross section, further possible embodiments of the invention in others Types of bricks, Fig. 9: in a longitudinal section a further embodiment of the invention, in which the solar energy into electrical energy and the thermal energy of a medium Fig. 10: to 15, also in longitudinal section, embodiments of the implementation the solar energy in thermal energy of a medium, the medium being within a Line system is performed, Fig. 16: in a longitudinal section through the brick a Another embodiment of the invention, in which electrical elements and a heating of a fluid flowing through it in free fall are provided, FIG. 17: schematically a system operated with roof tiles according to the invention.

In the embodiment of Figures 1 to 3, roof tiles 1 are in the form So-called beaver tail tiles like usual roof tiles on the battens 2 of a roof truss 3 launched. In order to compensate for thermal expansion, the bricks can be moved relative to one another. In this embodiment, the part 1 'of the brick is covered with a transparent, z. B. made of glass Cover 4 provided in which a Luitraum 5 and below one or more elements 6 in the, which the sunlight or convert the sun's heat into electricity. The elements 6 can on rest on the lower wall 7 of the brick. It is understood that the elements 6 opposite the brick parts are electrically isolated. This also applies to the other exemplary embodiments In a recess 8 is the flexible inlet or outlet 9, which leads to a Busbar 10 leads. It is within the scope of the invention to have several of these Strora busbars 10 to be provided (see Fig. 2). The circuit of the elements 6 of the individual bricks in series or parallel to each other and the corresponding electrical circuit of the Stromsammelsehienen 10 can be varied, so that one can meet the requirements of System can adapt to voltage and current levels. So requires z. B.

Charging a battery a low voltage while the immediate Operation of a pump or a motor, in contrast, requires a higher voltage. The recesses of the slots 8, in which the lines 9 are located, can be on the top be sealed with an insulating compound 11 (Fig. 6).

According to the AusLührungsbeispiel of Fig. 4 is on a brick 12 is a dark heat absorber layer 13 brought on, in or under which the here from To simplify the drawing, elements not shown for implementation of heat are in electrical energy. At the Embodiment of the Fig., are the electrical Flernente indicated by 15 in the material of the roof tile 14 embedded, for. B. encapsulated by this material. In In this case, the roof tile, in particular its upper wall 16 itself, acts as a heat absorber, which passes on the solar heat radiated on it to the element 15. The electric Elements could also be used as a dark-colored or coated heat-absorbing layer be trained.

For the reasons mentioned, flexible training is recommended the electrical supply and discharge lines to or from the brick. The electrical connections are not only to the bus bars 10 but also to the power generating elements of one brick to those of the other brick can be produced. For this purpose, releasable Plug or clamp connections are used, e.g.

the plug-in openings 17 in the exemplary embodiments of FIGS 8, which hold the inserted lines 9 in an elastic manner. You could too lead out of the openings or recesses S flexible lines and at their Provide ends with kletrirt- or plug-in means.

The above using the example of roof tiles in the form of beaver tails explained and illustrated principle of the invention can analogously in the same Can also be used for differently shaped bricks.

Thus, Fig. 7 shows bricks in the form of "lionne" 18 and "Monk" 19. The top wall 20 of the "barrel" is transparent. Below her is in that formed cavity 21 a power-generating element 7. Fig. 8 shows so-called interlocking tiles 23 with an upper transparent wall 24. In the cavity 25 are electricity-generating Elements 26 are provided.

The bricks described last are also the same as in the exemplary embodiment Given the beaver tail brick every circuit option, z. B. from the top Bricks to the underneath, as well as to the neighboring bricks, etc. Also in the The latter embodiment, the electrical elements are insulated in the brick stored. You could e.g. B. in plastic and with this plastic in be glued into the brick.

The embodiment of FIG. 9 shows a brick 27 on Part of its upper surface when installed is transparent is. One or more elements are located under this transparent cover 29, which convert sunlight or solar heat into electrical energy. With 9 'are electr. Incoming or outgoing lines denotes that are located in a bore or Slit-shaped recess 8 'are located, which is covered on the top with a mass 11' can be.

As mentioned, the invention also relates to the combination of solar energy elements converting into electrical energy with means for passing through and heating one gaseous or liquid medium within one and the same Brick. In the embodiment of FIG. 9, a pipe 30 is provided for this purpose, those below the translucent cover 29 in a zigzag or meandering shape runs (No. 31 and see also Fig. 10).

An absorber layer is located below the line part 31 32, which collects the sun's heat and passes it on to line 31. The lower one Ziegelxvmnd is labeled 33. The absorber layer 32 can rest on it or are at a small distance from it (see drawing). In the figures 10 and 11 details of the means for guiding the medium are shown. the FIGS. 12 to 16 show longitudinal sections through bricks according to the invention further design options in the design of the brick for the purpose of leadership of a medium in a line or in a line or pipe system. Are there for the sake of drawing simplicity in FIGS. 10 to 15, the elements for converting solar energy into electrical energy not shown. It understands that all the elements can be used that are in the I fall within the scope of the invention and in particular such elements and element orders, which are shown and explained in the preceding exemplary embodiments. It can therefore features or parts of one embodiment with those of another Embodiment are combined.

The cold medium, e.g. B. water, in the example of FIGS. 9, 10 of a closed line or pipe system is supplied at 34. In this embodiment are the o. g in the brick. Supply pipe 34 and a discharge pipe 35, the both in groove-shaped recesses, possibly covered on their upper side 36 of the brick are arranged. The recesses 36 can with the recesses 8 must be identical and in addition to the pipes also the electrical supply and discharge lines 9 (see also Fig. 11, which shows a section along the line XI-XI in Fig. 10 represents).

It goes without saying that the pipe section 34, 31, 35 is preferably an in is one-piece tube.

The transparent covers in this and in the other embodiments can be made not only of glass, but also of plastic or plastic film.

Two such transparent panes can also be provided one above the other that form an insulating layer of air between them, which prevents the radiation of heat to the outside prevented.

By means of an easy-to-make and detachable connection, e.g. B. a plug connection 37, the discharge pipe 35 carrying the warm medium connected to a flexible or bendable connecting line 38. This in turn can Via a corresponding plug connection 37 to the supply pipe 34 of the neighboring Bricks are connected, etc. Likewise is by means of such connectors 37 also the connection to the other, not shown here lines of the in itself closed line or pipe system, connection to a pump, etc. possible.

The water heated in this embodiment can be used in a heat storage tank, the boiler of a heater, a heat pump and the like are supplied and although pressureless or with pressure.

The lower wall 33 of the brick can either form the absorber itself or be occupied with it. The last-mentioned embodiment is shown in FIG. 12, the absorber 39 being provided with cavities 4G through which the medium flows. the connections of the cavities 40 to the line system of the medium are in this Figure, as well as in the embodiments of FIGS. 13 to 15, the simplicity not drawn for the sake of

of Figures 9 and 12 is in each case between the transparent pane 28 and the absorber or the pipes or the like carrying the medium a cavity 41 is provided, which is heated by the sun's rays. The wheel 28 could also consist of a glass in which air or glass bubbles are enclosed.

A brick could also be composed of two panes or halves of glass with the lower one blackened and the upper one transparent and between both panes form a layer of air and lines or the like carrying the medium are located. The brick could also be of a material other than clay, e.g. made of metal.

Fig. 13 shows an embodiment of the invention in which in the material of the brick bores, channels or the like 42 are through which the medium flows. Such a brick can be fired from clay in the usual way or made of another weather-resistant material (e.g. glass, metal or the like, as mentioned above), on its upper side facing the sun kaim the brick can be covered with a dark absorber layer 43, e.g. B.

V2A steel, which transfers the heat to the entire brick material and thus passes on to room 42. The shape of the cavities or recesses 42 and their Any number per brick can be selected. If the layer 43 is omitted, it acts the brick with its wetness itself acts as an absorber.

According to FIG. 14, an absorber layer 44 made of a dark, weather-resistant material, e.g. B.

V2A steel can also be applied, in which one or more Channels or cavities 45 are located for the flow of the medium. In a modification this embodiment, according to FIG. 15, corresponding flow spaces, pipes or the like 45 'may be provided between the absorber layer 44' and the brick. In both of the aforementioned exemplary embodiments, there is a direct heat transfer from the absorber layer 44 or 44 'to that in the pipes, channels or the like 45, 45 'flowing medium.

In the exemplary embodiments of FIGS. 12 to 15, it is also possible the cavities, pipes or the like for guiding the medium zigzag or ra; to run in an aander-shaped manner, as is the case in the exemplary embodiment of FIGS. 9 to 11 is shown. In this case, the medium is transported by a pump necessary.

A l> umpenbetrieb could of course also with an apprenticeship the cavities, channels or the like according to FIGS. 12 to 15 can be provided.

If the pipes, channels or the like go through from top to bottom pass through the bricks, a liquid medium can fall freely, i.e. without pressure, flow through it (see also the example in FIG. 16).

Also these different possibilities of the flow of a medium can be realized with all other common forms of lying. So can with roof tiles in the form of "oench and nun" between the upper edges of the "L.-onne" a transparent wall can be provided on which the "monk" rests, whereby the upward-facing surface of the "nun" is provided with an absorbent layer is, in or on which there are pipes, lines or cavities for the passage of the Medium. If the roof tile is designed as a folded or extruded seam tile, A transparent wall or wall part is provided as a pressed brick or pan, under which there is a space. The one below this space, upward facing side of the lower brick wall is with the heat absorption layer provided on or in which the pipes, lines or cavities for passage of the medium.

The inlets and outlets of the pipes, channels or the like in bricks can not only be located on the front sides, as in the exemplary embodiments is shown, but also on the long sides of the brick. According to the respective local conditions, requirements and systems to be supplied with energy the bricks or a certain number of bricks are interconnected and form for themselves the heat source of a certain medium cycle. So z. B. a part of a roof surface for heating a swimming pool and the other part serve to heat a hot water boiler and the like.

Fig. 16 shows an arrangement of bricks in which a fluid, e.g. B. water, flows along the bricks in free fall and is heated by solar radiation is, while at the same time electrical elements to convert solar energy into electrical Energy are provided. Avoids the flow of the fluid in free fall, i.e. without pressure Sealing problems. The intended arrangement allows the bricks to be moved to each other to compensate for temperature fluctuations. According to Fig. 16 is the upper Wall 46 of the brick, or a part of it with two superimposed transparent Covers 47, 48 provided. There is an electricity generating element between them 49, e.g. B. a thin-film cell made of the materials CdS and CuS, or the like. The parts 47, 48 and 49 can be in gradations the inner circumferential Wall edge 50 be stored. A supply or discharge is indicated by section 51. For the rest, reference is made in this regard to the previous exemplary embodiments.

On the lower wall 52 of the brick is an absorber layer 53, Via which the fluid flows according to the arrows 54. The absorber layer is a dark one Layer, e.g. 13. Blackened aluminum that collects the heat from solar radiation. It can be seen that the brick with a liohlzapfen 55 in which the liquid leading space of the next brick engages with a game so that the brick can shift to each other by the necessary play. The fluid can be from a Cold water pipe not shown in the drawing come across several rows of bricks distribute it in a thin layer over the hot absorber or absorber sheets 53 and finally into a hot water collecting pipe at the bottom bricks run and from there to a boiler or the like.

The layer 48 protects the cells or electricity generating elements 49 of the influence of the fluid 54. It is expedient to only use the free, visible one Brick part, which corresponds approximately to the area of the transparent cover 47, transparent design, but not the further higher lying one from the one above Brick covered part of brick. The amount of time per unit of time over the absorber layer flowing liquid can adapt to the outside temperature and the extent of the respective solar radiation can be changed.

The above-described combination of a brick with im Free fall flowing through fluid and a power generating element can be used in others Brick shapes like "monk" and "nun" press bricks etc.

are used, which have already been used in detail in other exemplary embodiments are mentioned or described.

In any case, the optical effect is one designed according to the invention Roof tile and thus diqbptische effect of a roof surface formed with such tiles approximately the same as the effect of normal roof tiles or roof areas covered with them. The transparent roof tile parts are a bit lighter than the rest, not transparent parts. But they don't appear as bright or transparent as a normal one Glass bricks, since under them there are usually darker areas such as the absorber.

In Fig. 17, the embodiment of a system is shown in the solar radiation indicated by the arrow 56 with bricks according to the invention both in electricity and in the heating of a medium, e.g. B. water, is implemented. Bricks according to the embodiments of Figures 9 to 16 are combined to form a group 57, of which water heated via line 58 a memory (boiler) 59 flows with insulation and by means of a pump 60 over the line 61 is fed back to the top of the group of bricks 57. At 62 are Compensating vessels designated. The hot water 63 heated in the ßoiler is via line 64 of the Tap fed. At 65 a partial heating of the hot water can be provided be. The cold inlet to the boiler 59 is 66 and the heat exchanger located therein of the medium heated by the bricks is numbered 67.

The electricity generated by the bricks is connected to the dashed lines (e.g. 68) fed to both the motor of the pump 60 and an accumulator 69, which is available as a backup or emergency power source.

A line 70 leads from the battery to an immersion heater 71, the can also contribute to the heating of the domestic water 63. Electric return cables are of course available, but to simplify the drawing not shown.

Instead of one brick group 57, different brick groups could also be used be provided, with a brick group only generates electricity and the another group of bricks only serves to heat a medium.

A combination would also be possible in which only one group of bricks Generates electricity and the other group generates electricity and at the same time heats a medium.

With such a system you are within certain limits also from the local Power grid independent, because for the operation of the system, here especially the pump for the water circulation, the accumulator is available.

If there is a lot of sunshine, the in addition generated electrical energy can be used elsewhere, e.g. 13th for heating the boiler 59 by means of the immersion heater 71.

All features shown and described, as well as their combinations with one another are essential to the invention.

- sayings -

Claims (30)

Patent and protection claims 1. Roof cover with built-in elements, which convert the radiated solar heat or the radiated sunlight are suitable in electrical energy, characterized in that the roof cover is designed as a roof tile that the roof tile one or more of the above Elements and means for the transfer of solar heat and / or sunlight has the element or elements and that means for electrical interconnection the elements of a group of roof tiles are provided. 2. Roof covering according to claim 1, characterized in that the Roof tile (1) is hollow and that the wall that is at the top in the installed state of the roof tile is transparent at least on a part (1 ', 28, 47) of its surface and that the element or elements are located within the cavity (5, 41) and below the transparent surface. 3. Roof covering according to claim 1 or 2, characterized in that the element or elements is designed as a dark / colored heat absorber, or are. 4. Roof covering according to claim 1, characterized in that the Element, or the elements (15) embedded in the material of the roof tile (14), z. B. is or are encased by the material of the roof tile, the roof tile acts as an absorber (Fig. 5). 5. Roof covering according to claim 1, characterized in that the Element or elements are located in or on an absorber layer (13) which is attached to the upper surface of a roof tile (12) (Fig. 4). 6. Roof covering according to one or more of claims 1 to 5, characterized through flexible electrical connecting cables to the individual roof tiles and from the roof tiles to the plant. 7. Roof covering according to one or more of claims 1 to 6, characterized characterized in that the brick with plug-in or clamping means (17) for connecting the electrical connection lines is provided. 8. Roof covering according to one or more of claims 1 to 6, characterized in that the electrical connection lines from the bricks led out and at their ends with plug-in or clamping means for connection with other lines (9) are provided. 9. Roof covering according to one or more of claims 1 to 8, characterized by one or more busbars (1O) below the Bricks or a row of bricks are attached to the roof structure (2, 3) and connection means for have the electrical connecting lines (9). 10. Roof covering according to one or more of claims 1 to 9, characterized in that the roof tile also has means for passing through it and heating a gaseous or liquid medium. 11. Roof covering according to one or more of claims 1 to 10, characterized in that the electrical 29, 49 tric elements (6, 15, 22, 26, / and / or the medium on its own or combined with the energy supply of a house or a house Serve house plant. 12. Roof covering and associated system according to one or more of claims 1 to 11, characterized in that the electrical elements are optional on an accumulator (69), or to electrically operated components such as a pump motor (60) or an immersion heater (71) act, the immersion heater (71) for itself or in combination with a heat exchanger (61) through which the medium flows for heating a boiler (59) is used. Roof covering and associated system to one or more of the Claims 1 to 12, characterized in that several groups on a roof covering Roof tiles are provided, with the one group only elements to implement the Having solar energy in electrical energy, another group just for the implementation is formed by solar energy in heating a medium and / or another further group I) aciiziügel is provided which converts solar energy into both electrical I convert energy as well as the warming of a medium flowing through it can and that the aforementioned groups can optionally be switched to a house system. 14. Roof cover and associated arrangement according to one or more of claims 1 to 13, characterized in that a gaseous or liquid Medium flows into a closed cyst that ili or attached to the bricks, respectively exposed to the heat, the medium-conducting line sections are and that the Ends of these line sections connections or Establish connection options to other parts of the system. 15. Roof covering according to claim 14, characterized in that the line sections in the form of one or more bores, hollow channels, cavities or the like (42) are located in the brick material, the brick itself as an absorber works. 16. Roof covering according to claim 15, characterized in that an absorber layer (43) is located on its upper side. 17. Roof covering according to claim 14, characterized in that the Line sections (40, 45) are built into an absorber layer, the Absorber in a layer covered by a glass or the like (28) Cavity (41) is located (Fig. 12), or attached to the top of a brick is (Fig. 14). 18. Roof covering according to one or more of claims 11 to 17, characterized in that the absorber (43, 44) as dark colored and against Weather-resistant layer, e.g. B. V2A sheet metal on the above Brick wall is attached (Fig. 13 and 14). 19. Roof covering according to one or more of claims 11 to 17, characterized in that the absorber (32) is located on or near the bottom Brick wall (33) is provided that there is a medium leading Tube (31) is located, above an air-filled space (41) and above a transparent one Layer (28), e.g. B. glass, is provided (Fig. 9). 20. Roof covering according to one or more of claims 14, 16 to 18, characterized in that the cavities, pipes or the like (45 ') there is an absorber layer (44 ') on the underside for the medium to flow through, which is applied to the brick (Fig. 15). 21. Roof covering according to one or more of claims 14 to 20, characterized in that the lines such as pipes, channels, cavities or the like for the passage of the medium through the brick in a zigzag or meandering shape get lost. 22. Roof covering according to one or more of claims 14 to 21, characterized in that line or pipe sections, in particular feed and discharge lines (34, 35) to meander-like or zigzag-shaped pipe sections (31) in groove-like Recesses (36) of the tile are located. 23. Roof covering according to one or more of claims 14 to 22, characterized in that the input and output of the line sections of the brick either on a narrow side, or on a long side or on a narrow and one long side of the brick. 24. Roof covering and associated arrangement according to one or more of claims 14 to 23, characterized by slightly, for. B. by means of a plug connection (37) connectable, flexible connecting or connecting lines (38) for the medium from brick to brick, or from brick to pipe or pipe Piping system. 25. Roof covering and associated arrangement according to one or more of claims 14 to 24, characterized by regulating the amount of the circulating Medium by means of a pump. 26. Roof covering according to one or more of claims 14 to 25, characterized in that the roof tiles in the form of "monk and nun" between the A transparent layer (glass or the like) is provided on the upper edges of the "nun" is on de the "monk" is supported, whereby the upward-facing surface of the "nun" is provided with an absorption layer, in or on or under the pipes, Lines or cavities or the like are located for the management of the medium. 27. Roof covering according to one or more of claims 14 to 25, characterized in that when the roof tile is designed as a folded or extruded folded tile, Press brick or pan on the top a transparent wall or wall part is provided is, the one to the lower wall of the hollow brick Space forms, with the upturned surface of the lower brick wall with a heat absorption layer is provided on in or under the pipes, lines or cavities for the Guidance of the medium. 28. Roof covering according to one or more of claims 1 to 13, characterized in that the overhead wall of the roof tile in the installed state at least on part of its area is transparent and that it is in the installed state lower wall of the roof tile at least on part of its surface on its upper one Wall facing side as a heat absorber, z. B. in Iorm a dark or so black coating is formed, over which a fluid runs, the transparent and heat-absorbing wall parts are arranged one above the other and of which the The fluid-carrying space is separated from a space that converts solar energy into electrical energy Element is provided. 29. Roof covering according to claim 2S, characterized in that the transparent upper wall, or the upper wall part made of two transparent layers (47, 48), between which the power generating element (49) is provided. 30. Roof covering according to one or more of claims 1 to 29, characterized in that the electricity-generating elements are thin-film cells, z. B. from the materials CdS and CuS.