WO2011057316A2

WO2011057316A2 - Solar collector system

Info

Publication number: WO2011057316A2
Application number: PCT/AT2010/000436
Authority: WO
Inventors: Herbert Huemer
Original assignee: Xolar Renewable Energy Gmbh
Priority date: 2009-11-13
Filing date: 2010-11-12
Publication date: 2011-05-19
Also published as: WO2011057316A3; AT512837A1; AT512837B1; DE112010004370A5

Abstract

The invention relates to a solar collector module (2) for arrangement on a substructure (4), in particular on the roof or the façade of a building, comprising an absorber element (8) that can be exposed to solar radiation (5) and an interface (11) formed by a thermally conducting element (14) on the rear (12) of the solar collector module (2) facing the substructure (4) for transferring thermal energy between the solar collector module (2) and a heat transport system (3) arranged on the substructure (4) or forming the substructure (4). The interface (11) comprises at least one contact surface (14) on the thermally conducting element (14) that can be brought into areal and detachable contact with the heat transport system (3).

Description

Solar collector system

The invention relates to a solar collector module according to the preamble of claim 1, a heat transport system according to the preamble of claim 16, a solar collector system according to the preamble of claim 21 and the use of solar collector modules according to the invention and a heat transport system according to the invention or a solar collector system according to the invention. For the replacement of fossil fuels, there have long been reasonable and useful approaches and solutions for the use of solar energy for the energy supply of buildings. For example, concentrating collectors or conventional flat-plate collectors have now reached a level of technical maturity that already makes significant contributions to saving fossil heat carriers from an economic point of view.

The commonly used in the market solar collectors are already prepared ready for installation in the factory, but they still have very large dimensions in most cases, which is why such solar panels can be installed only with suitable roof shapes and roof dimensions with reasonable effort and further including the visual impression of such solar panels equipped building is usually very much changed.

To solve this problem, there are already various approaches to make the covering of a roof skin so that thereby the function of solar collectors is achieved. For example, from DE 26 42732 C2 a solar roof is known, are formed in the roof tiles as a small solar panels with absorber and heat transfer and sealingly connected by means of connectors to ducts having battens. Such roof tiles in the form of small solar panels are structurally very complex and it must be given to each of the many tiles used a reliable, liquid-tight seal the interface between the roof tile and batten, which represents a variety of possible sources of error in practice.

The object of the invention is to provide a solar collector module that is easy to assemble and can be produced with little effort. The object of the invention is achieved by a solar collector module having the characterizing features of claim 1, according to which the interface comprises at least one contact surface, which can be brought into contact with the heat transport system in area-contacting and detachable contact, on a heat-conducting element. The heat exchange between the heat conducting element of the solar collector module and the heat transport system is based on heat conduction and heat transfer at the interface, but not on an exchange of a heat transfer fluid between the solar collector module and the heat transport system. As a result, a possible source of error due to leaks at the interface is eliminated; on the other hand, the solar collector module can thereby be constructed very simply and be manufactured at low unit costs. A possibly lesser due to the simple structure

Efficiency of a single solar collector module can be compensated by increasing the number of modules and thereby increased area for the energy consumption. The replacement of individual modules requires no knowledge of line installation, since there is a purely mechanical contact between the solar collector modules and the heat transport system without mass transfer. For good heat exchange, the contact surfaces of the heat-conducting element and the heat-transport system, which interact at the interface, have the best possible thermal conductivity.

A possible embodiment of the solar collector module is the contact surface of a heat conducting element from the rear side surface of the absorber element in the direction of

Thickness of the solar collector module to be spaced apart by a distance, wherein the distance is preferably a multiple of the thickness of the absorber element. Due to the good thermal conductivity of the Wärmeleitelements, which is in contact with the heat transport system on the substructure, arises at a temperature difference between Ab sorberelement and the Wärmeträgerfmid the heat transport system by heat conduction, a strong heat transfer to the heat transport system, even if the heat conducting element has a greater distance from the absorber element. Due to the nature of the spacing in the direction of the thickness of the solar collector module, the direction of the heat conduction is not oriented in extension of the absorber surface, but in the direction of the substructure or the building and thus there is greater flexibility in the design of the solar collector module as well as in the arrangement and Execution of the cooperating transport system. Since the solar collector module, in particular the absorber element with reduced or no heat dissipation through the heat transport system can have very high idle temperatures at full solar radiation, it is advantageous if the absorber element and / or the heat conducting element made of metal, in particular selected from a group comprising at least copper , Aluminum, steel, stainless steel, plastic and carbon nanotubes, is made or produced using such a material. In addition to the good temperature resistance of metals or corresponding high-temperature-resistant plastics, these have a good thermal conductivity, in particular greater than 15 W / mK, and thereby cause a high from the absorber element or heat conduction to the heat transport system and vice versa transferable heat output. In addition to these advantageous thermal properties, in particular, an absorber element made of metal also has high mechanical strength and furthermore has high weather resistance.

To improve the heat transfer between the absorber element on the outside and the heat-conducting element on the back of the solar collector module, these may be integrally connected or by means of a connecting element made of a material having a thermal conductivity of at least 15 W / mK, in particular metal, which may be formed as a separate component can, or is formed by at least a portion of the absorber element and / or the heat conducting element, be connected. In all three variants mentioned, a high heat output from the solar collector module to the heat transport system is possible by the good heat-conducting connection between the absorber element and the heat conducting element.

If the absorber element and / or the heat-conducting element are made of sheet metal, it is also possible to form the connecting element by forming one of the two elements, for example by a bending process on a bending press. Of course, a production of the absorber element, the heat conducting element or the connecting element in each case as separate components by bending operations or other forming processes made of sheet metal economically advantageous.

One possibility to produce an absorber element with internal fluid channels is to produce this medium by means of a so-called roll-bonding method, in which two sheets, preferably aluminum sheets, are rolled flat over one another at high pressure, wherein areas or zones are produced between the sheets prior to rolling, in which no joining between the sheets takes place by the rolling operation and these zones are expanded after rolling by a controlled inflation to channels in the interior between the joined sheets. In the area of the later channels, the sheets are provided with local recesses before being joined together or with

Release agent pretreated. The inflation process takes place in particular in special forms in which the surface of the sheets in the region of the channels receives a predefined shape. This production method is used very frequently for evaporators of refrigerators and can also be advantageously used for the production of absorber elements for the solar collector modules. The channels may in particular be arranged in the absorber element such that a heat transfer fluid contained therein due to local heating zones on the irradiated surface of the absorber element and local cooling zones in the region of the heat conducting element, similar to a thermosiphon due to density differences performs natural Umwälzbewegungen. In this case, the heated and therefore lighter heat transfer fluid flows upwards in the channels, while the heavier heat transfer fluid cooled by the heat-conducting element sinks downwards in the channels and is thereby supplied to the heating zone. Heat-conducting element and also a possibly provided connecting element can also be connected in one piece with this embodiment of the absorber element.

The connecting element thus serves for heat conduction between the absorber element and the heat-conducting element. The metallic cross-section of the connecting element in the direction of the heat conduction should therefore not be designed so small that quasi a heat accumulation occurs at the absorber element, through which its temperature rises unnecessarily high, although heat from the heat transport system due to the temperature differences could be absorbed.

An alternative embodiment of the solar collector module can consist in that the absorber element and the heat-conducting element adjoin a cavity which is formed between them and formed in the interior of the solar collector module and filled with a heat transfer fluid. In this case, the heat transfer between the absorber element and the heat-conducting element does not take place by means of a metallic connecting element but via the cavity contained in the cavity and both to the absorber element and to the heat transfer element. Meleitelement adjacent heat transfer fluid. The heat transfer takes place both by Wärmeleitvorgänge within the heat transfer fluid and by convection of the heat transfer fluid within the cavity. As a heat transfer fluid, for example, a water-antifreeze mixture is used, which is particularly suitable by high temperature resistance, a high boiling point, a low freezing point, high chemical stability, etc. The adjoining the cavity inner surfaces of the absorber element and the heat-conducting element are, in order to achieve the highest possible heat transfer performance, as large as possible and can by ribs or the like have an enlarged surface. The convection of the heat transfer fluid within the cavity is due to the thermosiphon effect caused by density differences within the heat transfer fluid at a cavity with greater vertical extent stronger, therefore, this embodiment of the solar collector module is recommended rather for inclined and vertical attachment and less for horizontal attachment. A solar collector module embodied in this way is similar to an absorber element described above, produced by a roll-bonding method, and both variants represent solar collector modules with self-contained heat transfer fluid circuits, with which large amounts of heat can be transported within the solar collector module.

In order to minimize heat losses during the transfer of heat between the absorber element and the heat-conducting element, it is advantageous if the absorber element on its not irradiated by solar radiation rear side and the heat-conducting outside of the heat transport system contacting heat conduction surface and the connecting element or the cavity of a thermal insulation material with a thermal conductivity of max. 0.1 W / mK are surrounded or enveloped. As a result, the heat generated by the solar radiation in the absorber element is effectively forced to propagate through the connecting element or the cavity with the heat transfer fluid to the heat-conducting element and possible heat losses on the back or underside of the solar collector module by convection or radiation are reduced. The temperature of the heat-conducting element is kept at the highest possible level by these and other measures, whereby a high heat output can be transmitted even with relatively small dimensions of the heat transport surface contacting the heat transport system. In this case, all conventional heat-insulating materials which have sufficient resistance in the expected temperature range and can be produced economically and attached to the solar collector module can be considered as thermal insulation material. When the thermal insulation material surrounds these components, there may be a small distance between the components and the thermal insulation material, which is filled approximately by air, but small enough to avoid convective heat transfer into the thermal insulation material. In one of the components absorber element, heat conducting element and, if present, connecting element enveloping thermal insulation material, this borders directly on their not intended for heat transfer surface and can either be supported by this themselves or vice versa for this exercise a support function. This is particularly advantageous if absorber element, connecting element or boundary surfaces of the cavity and the heat conducting element are made of thin, less rigid material and the thermal insulation material has a certain inherent rigidity. In order for no disadvantageous changes to the thermal insulation material to occur in the absence of heat dissipation from the solar collector module and thereby caused high idle temperatures, it is advantageous if this mineral fibers and / or mineral foam comprises or is made entirely from such materials. For example, glass wool or rock wool can be used as thermal insulation material, which are mentioned as examples of soft thermal insulation materials which are supported by the absorber element, the connecting element and the heat-conducting element. As an example of a mechanically stable thermal insulation material, which causes a support function for absorber element, connecting element and heat-conducting element here is a mineral insulation of foamed calcium silicate hydrate (trade name: Multipor ®) called. The thermal insulation materials mentioned are resistant to temperatures beyond 300 ° C and therefore well suited for this purpose. Solar collector modules in which the absorber elements do not reach such high idle temperatures may also be provided with polymer-based or natural-based thermal insulation material such as high temperature plastic foams or wood fiber materials or plastic wood composites.

In order to perform the absorber element and the heat-conducting relatively thin and thus easy, it is advantageous to arrange as possible, the absorber element and the heat-conducting on a supporting body, which has a thermal conductivity of max. 1 W / mK. This increases the mechanical load capacity of the solar collector module, but prevents or reduces due to its relatively low thermal conductivity, the undesirable outflow of heat to the environment. To ensure that the majority of the solar energy absorbed by the absorber element is supplied to the heat transport system, the solar collector module is advantageously designed so that the thermal conductivity of the absorber element and the heat conducting element is at least 10 times higher than the thermal conductivity of the body, in particular greater 40 W / m , The thermal conductivity of the material constituting the main body is in particular less than 1.0 W / mK. Together with the relevant for the heat conduction cross sections of the heat conducting, absorber element, possibly also the connecting these two connecting element, and the body are Wärmeleitwiderstände of the individual components, whereby the cross sections are chosen so that the Wärmeleitwiderstand for the heat conduction from the absorber element through the body to the environment is significantly greater than the thermal resistance for the heat conduction from the absorber element to the heat conducting element. Mineral material such as lightweight concrete, clay materials, etc., as well as natural materials such as wood, wood-based materials or plastics such as thermosets, high-temperature thermoplastics, ABS, PVC, plastic foams, mineral foams, polymer-bound wood fiber materials and composite materials the above-mentioned in question, which usually have a thermal conductivity less than 1.0 W / mK and can endure the weather influences occurring at the solar collector module as well as temperature effects without adverse changes. A rational and economical production of the solar collector module is also possible if the base body is produced by a primary molding method, in particular an injection molding method or an extrusion method, wherein the preferably usable method essentially depends on the geometry of the basic body. Thus, for example, a base body made of plastic material can be produced in an injection molding process, wherein a high freedom of design with respect to the mold and the body in a single process step essentially receives its finished shape, while an extrusion process is suitable for the economic production of a large amount of semi-finished parts from de- NEN be prepared by cutting and possibly further completion basic body for solar collector modules.

For the economical production of the flat absorber element and / or the metal heat conduction element, preferably forming processes are used with which specially shaped components for the solar collector module are produced from sheet metal blanks. In this case, tensile forming or bending forming processes can be used as the forming process, which can also be used for the production of connecting elements between the absorber element and the heat conducting element.

If the absorber element is covered on the outside of the solar collector module with a cover element that is at least partially transparent to solar radiation, an undesired convective heat emission to the outside environment can be reduced, whereby the absorber element can deliver a higher power to the heat transport system by increasing the same solar radiation output to a higher one Starting temperature is heated and, accordingly, more heat energy is transferred to the heat transport system. As a cover, for example, a transparent glass or a transparent plastic of appropriate thickness and mechanical resistance can be used. Such a cover allows most of the solar radiation to reach the absorber element, but inhibits the release of heat to the outside environment by convection or heat radiation. The cover element is at least partially transparent, which in this context is to be understood as meaning that it allows a maximum of the solar radiation energy to pass through to the absorber element during normal operation, but also that in certain operating states the permeability for solar radiation is temporally and may be limited in intensity. This is possible, for example, by an embodiment of the cover element with variable or controllable light transmission.

In addition to the conversion of solar energy into heat energy, which is supplied to a heat transport system, the solar collector module may additionally comprise a photovoltaically active solar cell arrangement with which a conversion of solar energy into electrical

Energy is possible. This may be advantageous if the need for thermal energy of the building is met, but solar energy is sufficiently available for the generation of electrical energy. The arrangement of the solar cell array can be next to the Be absorber element, so that the solar radiation can irradiate both the absorber element and the solar cell array at the same time, but alternatively also so that the solar cell array is disposed outside of the absorber element and the absorber element only meets the proportion of solar radiation, which is not taken up by the solar cell array becomes. In particular, the solar cell arrangement can also be part of the transparent cover element or act as such.

The amount of solar radiation impinging on the absorber element can thereby also be actively influenced by a transparent design of the cover element or the solar cell arrangement with variable light transmittance, for example to lower the idle temperature of the absorber element, in return the idle temperature of the overlying cover element or the solar cell arrangement is raised. In a further embodiment, a heat pipe, which is also referred to as a heat pipe, may be arranged in the cavity for heat transfer to the heat-conducting element, in which a liquid is vaporized in the region of the warmer absorber element and by condensation in the region of the cooler heat-conducting element considerable amounts of heat to this can be transmitted. The condensed liquid is then recycled back to the evaporation zone at the absorber element, which in particular gravity effect or capillary action can be used. As a liquid, for example, water, alcohol or any other liquid can be used, which allows use at the given temperature spread between absorber element and heat conducting element. For this purpose, in particular liquids with a boiling point preferably between about see about 20 ° C and 100 ° C can be used.

The invention further relates to a heat transport system according to the preamble of claim 16 for the transfer of heat from or to solar collector modules, in particular solar collector modules according to the invention. According to the invention, the interface for transporting heat is provided by at least one heat collecting surface (15), which can be brought into surface contact and releasable contact with at least one solar collector module (2) and is arranged on a straight pipe section (26) made of a material with a thermal conductivity of at least 15 W / mK , in particular of metal. The heat exchange between In this case, the solar collector module and the heat transport system are in turn based on heat conduction and heat transfer at the interface, but not on an exchange of a heat transfer fluid between the solar collector module and the heat transport system. This eliminates a possible source of error due to leaks at the interface, and the heat transport system can be very simple and inexpensive

To reduce energy losses, the pipe of the heat transport system may have on its outer circumference a heat-insulating layer which is interrupted in the region of the heat collecting surface. As a result, it is largely prevented that heat energy transferred from the solar collector module can be released from the pipeline as heat loss to the environment. The thermal insulation of the pipeline is also particularly advantageous if the heat transport system acts as part of a heat pump system, with the solar collector modules or their absorber elements environmental heat should be collected, which is transmitted via the absorber element and the heat-conducting to a heat transfer fluid at a lower temperature.

To be able to transfer as much heat energy per unit length of the heat transport system, it is advantageous if each of the heat collecting surface extends over a large part of the length of a straight pipe section. As a result, it is also possible to install solar collector modules at arbitrary positions along the straight pipe section, thereby providing greater flexibility in laying the collector modules. It is thus possible to pre-assemble the straight pipe sections of the heat transport system, such as roof battens of a roof construction or on a facade construction, and to add, for example by hose connections, to a meandering heat transport system, and subsequently to mount the solar collector modules at arbitrary positions along the straight pipe sections. An advantageous embodiment of the heat transport system is that a straight pipe section provided with a heat collecting surface is formed by a metal pipe to which the thermal barrier coating is applied by an extrusion process. The production of such sections of pipe in the form of piece goods can be very economical and can be cut from the semi-finished products depending on the requirements of the mounting location straight pipe sections with the required length. The metal tube has a high thermal conductivity, whereby a good heat transfer to the therein given heat transfer fluid is given, while the externally mounted heat-insulating layer limits the heat exchange substantially to the heat collecting contacted by the heat collecting surfaces. As a thermal barrier coating mainly come polymer foams or extrudable wood fiber polymer foams in question.

An alternative embodiment of the heat transport system is that a straight pipe section is formed in each case by an extruded plastic tube with heat collecting surfaces on their own insert elements of good heat conducting material. By using a plastic pipe for the straight pipe section, in turn, the heat output from the heat transport system is reduced to the environment and can be optionally dispensed with an external thermal barrier coating by this design. In order nevertheless to enable a good heat exchange with the solar collector modules, the plastic pipe has one or more insert elements made of a material with a thermal conductivity of at least 15 W / mK, in particular of metal, which serve as heatable in contact with the heat-conducting elements and a good Have thermal conductivity.

The invention further relates to a solar collector system according to the preamble of claim 21, comprising a heat transport system with a heat transfer fluid, a plurality of solar collector modules with an absorber element and an interface for the transmission of heat energy between the heat transport system and the solar collector modules. According to the invention, the solar collector modules are formed according to the previous embodiments and the heat transport system is also formed according to the previous embodiments and are the heat-conducting elements of the solar collector modules surface contacting and releasably in contact with the heat collecting surfaces of the heat transport system. Such a solar collector system is characterized by the fact that after installation of the heat transport system only simple installation of the solar collector modules is carried out without installation work and due to the simple structure and large roofs or facade surfaces for the collection of solar energy or environmental energy or as a heat exchanger system for air conditioning can.

For the use of the solar collector system on roofs or facades, the heat transport system can be an arrangement of parallel and in, preferably regular distance zuei- comprise mutually extending, horizontal pipe sections, wherein each solar collector module at least one of these pipe sections with a heat conducting surface contacting and releasably contacted the heat collecting surface. The heat transport system is thus designed as a kind of pipe register, wherein the distance between the individual pipe sections is adapted to the dimensions of the solar collector modules.

If the pipeline sections are designed to be structurally stable, and the solar collector modules have attachment projections for suspension at the pipeline sections on their rear side, additional substructures in the form of battens or the like on the roof surface or facade surface can be dispensed with. In particular, the heat conducting elements can be arranged on the suspension projections of the solar collector modules, whereby the contact with the heat collecting surfaces at the pipe sections is supported by the weight of the solar collector modules.

An alternative embodiment of the solar collector system according to the invention is that the heat transport system is designed as an arrangement of sloping or falling perpendicular to a roof construction or facade construction or vertical parallel and preferably regularly spaced pipe sections and bridge the solar collector modules a horizontal distance between two adjacent pipe sections and with two spaced apart in the horizontal direction of heat conduction elements on two adjacent pipe sections in planar, touching and releasable contact with the heat collecting surfaces are. In this embodiment of the solar collector system, the straight pipe sections, in particular the function of vertical uprights on a facade construction or inclined rafters of a

Accept roof construction on which the solar collector modules, such as facade panels or tile elements, are arranged.

If the heat transport system or its straight pipe sections are not designed for static loads, the solar collector modules can be arranged on conventional substructures, such as roof battens or other slatted substructures. If a plurality of solar collector modules are arranged adjoining or overlapping along a straight pipeline section, and the heat-conducting elements of the solar collector modules cover at least approximately the entire heat collecting surface on this pipeline section, a large contact area is available for the heat exchange between the solar collector modules and the heat transport system, which alone By heat conduction processes a large heat output can be transmitted. In this case, the strip-shaped heat collecting surface on the pipe sections is contacted by the individual, strip-shaped heat-conducting elements of the solar collector modules as completely as possible.

The heat-conducting surface of the heat-conducting element and the heat collecting surface of the heat transport system can be designed as flat contact surfaces, whereby a good contact and thus a good heat transfer are ensured even with slight relative displacements between solar collector modules and heat transport system. At the same time flat contact surfaces are easy to prepare and the cooperating contact surfaces can be additionally provided with thermal grease, whereby air gaps between the cooperating contact surfaces, which inhibit the heat transfer, are prevented.

In a heat transport system with high pipe sections made of metal pipes, the heat-conducting element may advantageously also have a cylinder-shaped contact surface which rests over the entire surface of the outer shell of a metallic pipe section, whereby the attachment or production of their own heat collecting surfaces can be omitted on the pipe sections, as this formed by the outer shell of the pipe sections are.

To avoid undesirable heat exchange with the environment, it is advantageous if the heat-conducting elements of the solar collector modules which are in contact with one another and the heat-collecting surfaces of the heat transport system are enveloped in the connections to the solar collector element or to the pipe section by a heat-insulating layer. This heat-insulating cladding of the interface can in particular be designed such that a recess present in the heat-insulating layer of the heat transport system in the region of the thermal samarium surface is largely closed by a heat-insulating element on the solar collector module when the solar collector module is mounted. In In this embodiment, this heat-insulating element is penetrated only by the connecting element, at the end of which the heat-conducting element is arranged.

For good thermal insulation at the interface between the solar collector module and the heat transport system, it is furthermore advantageous if, when the solar collector module is mounted, a thermal insulation material or thermal insulation element surrounding the heat-conducting element is pressed against the thermal insulation layer of the heat transport system. The compliance of contiguous thermal insulation materials is chosen such that the contact between the heat-conducting element and the heat-collecting surface is not appreciably reduced.

The mechanical contact between the heat-conducting and the heat collecting surfaces can be reliably ensured by hooks, tongues, pins or similar fastening projections are formed on the heat conducting elements or on the heat collecting surfaces, which engage positively in the assembled state in openings on the heat collecting surfaces and the heat conducting elements. Such hooked solar collector modules remain reliably fixed in heat-conducting contact on the heat transport system, but may also be assembled or disassembled without tools by a suitable relative displacement.

The mounted solar collector modules preferably also form a roof-tile-like roof or a flat facade outer skin, whereby the cost of a conventional roof or facade can be omitted. The solar collector module according to the invention and the heat transport system according to the invention or the solar collector system according to the invention can, as already explained, advantageously serve for the absorption of solar energy and ambient heat and supply to a heat cycle or be used for the release of heat from a cooling circuit to the environment. Accordingly, the invention can also be used for heating and heating purposes but also for cooling purposes.

For a better understanding of the invention, this will be explained in more detail with reference to the following figures. Each shows in a highly schematically simplified representation:

Fig. 1 shows a section through an inventive solar collector system with a

Heat transport system contacting solar collector module;

2 shows a cross section through a modular solar collector system in another

Embodiment as the roofing;

3 shows a cross section through a further embodiment of a solar collector system with a heat transfer fluid in the solar collector module.

4 is a partial view of another embodiment of a solar collector system used as a facade on a building;

5 shows a section along line V - V through the solar collector system of FIG. 4;

FIG. 6 shows a section according to line VI-VI through the solar collector system according to FIG. 4; FIG.

7 shows a section through a further embodiment of a solar collector system in FIG

Area of interface for heat transfer between solar collector module and heat transport system;

8 shows a section through a further embodiment of the solar collector system in FIG

Area of interface for heat transfer between solar collector module and heat transport system and

9 shows a cross section through a further embodiment of a solar collector system with the use of a heat pipe in the solar collector module and a cover element above the absorber element.

By way of introduction, it should be noted that in the differently described embodiments, the same parts are given the same reference numerals or the same component designations, the disclosures contained throughout the description being applied mutatis mutandis to the same. che parts with the same reference numerals or the same component names can be transferred. Also, the position information selected in the description, such as top, bottom, side, etc. related to the immediately described and illustrated figure and are to be transferred to a new position analogous to the new situation. Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

All statements on ranges of values in the description of the subject should be understood to include any and all sub-ranges thereof, e.g. the indication 1 to 10 should be understood to include all sub-ranges, starting from the lower limit 1 and the upper limit 10, i. all subregions begin with a lower limit of 1 or greater and end at an upper limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.

Fig. 1 shows a cross section through an embodiment of a solar collector system 1, comprising a solar collector module 2 and a heat transport system 3, which is arranged on a substructure 4, not shown, such as a building or a separate frame. The solar collector module 2 serves to absorb solar radiation 5 indicated by dashed arrows and to supply the heat transport system 3 in the form of heat. The heat transport system 3 is part of a heat cycle and comprises a flowed through by a heat transfer fluid 6 pipe 7. The solar collector module 2 comprises at least one absorber element 8, which is arranged on the solar radiation 5 exposed outside 9 of the solar collector module 2 and by receiving solar radiation 5 th experiences a heat supply. The absorber element 8 is preferably formed of metal with a thickness of a few millimeters and, in order to reduce heat radiation, which increases sharply with an increase in temperature of the absorber element 8, may have a selective coating 10, which will not be explained in detail here. The heat energy absorbed by the solar collector module 2 is transmitted to the heat transport system 3 via an interface 11 in the region of the rear side 12 of the solar collector element 2 facing the substructure 4. The interface 11 is formed by a arranged on the back 12 of the solar collector module 2 heat-conducting element 13 which is in contact with a contact surface 14 in planar, touching and releasable contact with a heat collecting surface 15 on the pipe 7. In the exemplary embodiment shown, the contact surface 14 has a spacing 16 from a rear side surface 17 in the direction of the thickness 18 of the solar collector module 2. The distance 16 preferably corresponds to a multiple of the thickness of the absorber element eighth

The absorber element 8 and / or the heat-conducting element 13 are preferably made of metal, for example of copper, aluminum, steel or stainless steel, for reasons of good heat conductivity and good temperature resistance. Furthermore, the absorber element can also be produced using carbon nanotubes with extremely high absorptivity and thermal conductivity. High-temperature-resistant plastics can also be used.

The heat transfer from the absorber element 8 to the heat transport system 3 is effected by this distance 16, ie substantially by heat conduction in the direction of the thickness 18 of the solar collector module 2. In order to achieve a good heat conduction between the absorber element 8 and the heat-conducting element 13, in the illustrated embodiment between these two at least one connecting element 19 is provided, which consists essentially of material having a thermal conductivity of at least 15 W / mK, whereby at a temperature difference between the absorber element 8 and heat conducting element 13, the heat transferred is transferred to a substantial lent share via the connecting element 19. As shown in FIG. 1, the connecting element 19 may be formed as a separate component, which is fastened with both ends to the absorber element 18 or the heat-conducting element 13 or formed by at least one section of the absorber element 8 and / or the heat-conducting element 13. if they have such extensions, which can serve as a connecting element 19 have.

The solar collector module 2 according to FIG. 1 comprises, in addition to the components which effect the heat conduction, the absorber element 8, the connection element 19 and the heat-conducting element 13 Base body 20, which provides in addition to the other components for the required strength of the solar collector module 2, and preferably has a relatively low thermal conductivity, whereby the main body 20 is involved in heat transfer processes of the solar collector module 2 only to a relatively small extent and absorbed by the absorber element 8 thermal energy is transmitted mainly to the heat-conducting element 13, as long as there is a temperature difference between these two.

The main body 20 may in particular consist of a thermal insulation material 21 with a thermal conductivity of at most 0.1 W / mK, whereby the absorber element 8 thermal energy absorbed from the solar radiation 5 substantially only by heat radiation and convection on the outside 9 and by heat conduction to the heat-conducting 13 can deliver. If the temperature of the heat transfer fluid 6 of the heat transport system 3 is already close to the temperature of the absorber element 8, only very little heat output is transmitted via the interface 11, and accordingly the temperature of the absorber element 8 increases again until a balanced heat balance is established again , Since the absorber element 8 of the solar collector module 2 assumes very high temperatures with strong solar radiation 5 and reduced heat dissipation to the heat transport system 3, the thermal insulation material 21 may preferably comprise mineral fibers and / or mineral foams. Glass wool, rockwool, porous concrete, porous brick, etc. are examples here.

In order to reduce heat losses through the heat transport system 3, the pipe 7 is carried out on its outer circumference even heat-insulating or provided with a thermal insulation, the heat collecting surface 15 from the outside for the contact surface 14 of the solar collector module 2 is accessible. In the exemplary embodiment according to FIG. 1, the pipeline 7 is formed in the region of the solar collector module 2 by a metal tube 22 which is surrounded on its outer periphery by a thermal insulation layer 23. This thermal barrier coating 23, similar to the base body 20, preferably consists of thermal insulation material with as low as possible a thermal conductivity, preferably less than 0.1 W / mK. The thermal insulation layer 23 has only in the area of the heat collecting surface 15 a recess through which it can come into contact with the solar collector module 2. As can be seen in FIG. 1, the thermal barrier coating 23 can extend to the main body 20 or to the thermal insulation material 21 of the solar collector module 2, whereby the interface 11 is at least approximately completely surrounded by poorly heat-conducting material and unwanted heat losses are largely avoided.

2 shows an embodiment of a solar collector system 1 in the form of a roof covering 24, in which the solar collector modules 2 assume the function of roof tiles or roof tiles, and the heat transport system 3 performs the function of roof battens. In this case, the heat transport system 3 comprises an arrangement of parallel and regularly spaced horizontal pipe sections 26, to which the individual solar collector modules 2 are fastened. The solar collector modules 2 have on their outer side 9 again an absorber element 8, which is preferably formed by a metal sheet and at a temperature difference between the absorber element 8 and the heat transfer fluid 6 in the pipe sections 26 by thermal conduction via the interface 11 thermal energy to the heat transfer system 3 transfers ,

The interface 11 comprises on the side of the solar collector module 2, a heat-conducting element 13 made of metal, which is thermally conductively connected via a connecting element 19 with the absorber element 8. This heat-conducting element 13 contacts a heat-collecting surface 15 on the pipe section 26 with a contact surface 14, thereby forming the interface 11 for heat transfer 11. The pipe section 26 comprises a metal pipe 22, on which the heat collecting surface 15 is arranged made of metal and which is surrounded at its outer periphery by its thermal barrier coating 23, except in the region of the heat collecting surface 15. Metal tube 22 and the surrounding thermal barrier coating 23 are in the illustrated embodiment in one U-shaped carrier profile 27 was added, which allows the required approximation of the contact surface 14 of the solar collector module 2 to the heat collecting surface 15 of the pipe section 26. As indicated in FIG. 2, the carrier profile 27 can also assume the statically supporting function of a roof batten which supports the solar collector module 2. The solar collector module 2 preferably again has a base body 20 with a thermal insulation material 21 on the rear side surface 17 of the

Absorber element, whereby a possible heat radiation in the direction of substructure 4 is largely suppressed and thereby the temperature of Absorberele- ment 8 at a higher level, whereby the heat transfer to the heat transport system 3 is enhanced.

In Fig. 2, the connecting element 19 is integrally formed on an end portion 28 of the absorber element 8, for example by a bending process and is coated on both sides with thermal insulation material 21, whereby heat losses during heat transfer to the contact surface 14 are largely prevented. In addition, it would be possible for the heat-conducting element 13 to be produced by a further bending operation on the connecting element 19 and thus the absorber element 8, the connecting element 19 and the heat-conducting element 13 with the contact surface 14 are produced from a sheet metal blank.

FIG. 3 shows a further embodiment of the solar collector system 1, which can be used as a facade system or, as shown, as a roof covering 24. In this exemplary embodiment, the solar collector module 2 with the outer absorber element 8 and the contact surface 14 distanced therefrom by the distance 16 has a base body 20 in which a cavity 29 is formed, which is connected both to the rear side surface 17 of the absorber element 8 and to the Wärmeleitelement 13 is adjacent and filled with a heat transfer fluid 30. The heat conduction from the absorber element 8 to the heat-conducting element 13 thus takes place in this embodiment by the heat transfer fluid 30 by heat conduction and Konvektionsvorgänge within the heat transfer fluid 30 in the cavity 29. Depending on the design of the cavity 29 and the heat transfer fluid 30 contained can be the proportion of convection or outweigh the heat conduction.

As indicated in dashed lines in FIG. 3, in addition to the heat conduction via the heat carrier fluid 30, an additional connecting element 19 may be provided, which may additionally be involved in the heat transfer between absorber element 8 and contact surface 14.

The solar collector elements 2 are also arranged in this exemplary embodiment on straight pipe line sections 26 of the heat transport system 3. The pipe 7 is again formed by a metal tube 22, which is provided on its outer periphery with a thermal barrier coating 23. The mechanical support of the solar collector module 2 takes place again in the illustrated embodiment by a carrier profile 27, the hereby bei- is playfully formed by an angle steel 31 and secured with suitable fasteners on the roof substructure. For the mechanical connection between the solar collector module 2 and the carrier profile 27, as in FIG. 2, the solar collector module 2 has a suspension projection 32 with which the solar collector module 2 can be suspended from the pipe section 26 like a roof batten.

In the exemplary embodiment according to FIG. 3, the heat-conducting element 13 is arranged on the rear side 12 of the solar collector module 2, while it is arranged on the insertion projection 32 in the exemplary embodiment according to FIG. The pipe 7 with the heat collecting surface 15 may be supported elastically yielding by the heat-insulating layer 23, whereby in the assembled state of the solar collector module 2 advantageously a contact pressure between the heat-conducting element 13 and the heat-collecting surface 15 prevails, which ensures the heat transfer between these two elements. FIGS. 4, 5 and 6 show a further embodiment of a solar collector system 1 arranged on a substructure 4, for example a facade of a building. The arranged on the building heat transport system 3 comprises an array of vertical parallel and preferably at a regular distance 33 extending to each other, straight pipe sections 26. The pipe sections 26 include here again a pipe 7, which has a heat-insulating layer 23 on its outer periphery. This thermal barrier coating 23 is interrupted in the region of Wärmesammeiflächen 15, whereby they are accessible to the contact surfaces 14 of the solar collector elements 2. In FIG. 4, such a recess 34, which extends slit-like along the pipe 7, is shown. At the portions of the heat collecting surface 15, which are not in contact with a solar collector element 2, it is provided that the heat insulation layer 23 is supplemented by corresponding insulating elements within the recess 34 in order to avoid heat losses at these points.

In FIG. 4, for the sake of simplicity, only one solar collector module 2 is shown in the assembled state, it being understood that a solar collector module 2 bridges the distance 33 between two adjacent pipe sections 26 and is strip-shaped and at each end has a heat-conducting surface 14 having the heat collecting surface 15 of a pipe section 26 contacted surface and releasably. In this case, the recess 34 of a pipe section 26 has a width which allows side by side to receive two contact surfaces 14 of two adjacent to each other at their front ends in the longitudinal direction of the solar collector modules 2. This can be seen in particular in FIG. 5, which shows a cross section along the line V - V in FIG. The angled part of a solar collector module pointing in the direction of the heat transport system 3 thereby fulfills approximately half of the recess 34 in the thermal barrier coating 23 of the straight pipe section 26 and the second half is filled by an adjacent solar collector module 2, not shown. In FIG. 4, the strip-shaped contact surfaces 14, which almost completely cover the heat collecting surface 15, are indicated in dashed lines. In the embodiment according to FIG. 4, with a temperature difference between the absorber element 8 and the heat collecting surfaces 15, heat is dissipated to both sides, indicated by the arrows 35. The straight pipe sections 26 can be produced, for example, by a metal pipe 22 Extrusion method, an outer thermal barrier coating 23, for example, made of a plastic foam or a mineral foam is attached. The straight pipe sections 26 are cut from such semi-material in the required length; the connection at joints 36 between two front ends of straight pipe sections 26 to be joined is preferably carried out by means of a plug connection element 37 which comprises, for example, a short piece of pipe which is inserted into the two ends of pipes 7 to be joined. Preferably, such a connector element 37 is provided with a thermal barrier coating 38.

FIG. 5 shows in dashed lines a thermal insulation element 39, with which regions of the heat collecting surface 15 of a pipeline section 16, which are not covered by a contact surface 14 of a solar collector module 2, can be heat-sealed. In order to ensure a low-loss heat conduction from the absorber element 8 to the heat conductor element 13 or its contact surface 14, in this embodiment, the rear side surface 17 of the absorber element, the heat-conducting element 13, as well as the two connecting connecting element 19 in a support body 20 with poor thermal conductivity, in particular So a thermal insulation material 21 included. The heat collecting surface 15 is realized in this embodiment by a flat U-profile 40, wherein its base on the outside of the profile cross section, the heat collecting surface 15, while the upstanding from the base legs are thermally conductively connected to the pipe 7 in the form of a metal tube 22 , In an alternative embodiment, it would be possible for the heat collecting surface 15 to be formed by a flattening on a metal tube 22.

The embodiment of the heat-collecting surface 15 shown in the exemplary embodiment according to FIGS. 5 and 6 results in a cavity 41 between the base of the U-profile 40 and the metal tube 22, which cavity can be used as follows:

On the heat conducting element 13 a plurality of fastening extensions 42 are arranged distributed in the direction of the pipe axis, which protrude through openings 43 in the underlying cavity 41 and hintergrei- after Relatiwerschiebung the solar collector module 2 openings 43. In the illustrated embodiment, the attachment extension 42 is formed by a mushroom pin whose thickened end engages behind the U-profile 40 adjacent to the opening 43. Alternatively, instead of a mushroom plug, a hook, a tongue or another fastening extension 42 may be provided, which ensures a positive connection between the heat-conducting element 13 or its contact surface 14 and the heat-collecting surface 15.

In order to effect the best possible heat conduction of the absorber element 8 to the heat collecting surface 15, the length of the strip-shaped contact surface 14 is at least approximately equal to the width 44 of such a solar collector module 2. It is also advantageous if the provided for the heat conduction cross sections of the connecting elements 19 equal or greater than the effective cross-section of the absorber element 8, and in particular the heat resisting starting from the absorber element 8 to the pipe 7 of the heat transport system 3 as possible not increase, but preferably decrease and thereby the temperature of the absorber elements 8 can be kept low and concomitantly reduced losses due to heat radiation are. In order to be able to transmit the largest possible heat outputs between solar collector modules 2 and the heat transport system 3, the heat collecting surface 15 extends as far as possible over a large proportion of the length of a straight pipe section 26. FIG. 7 shows a further exemplary embodiment of an interface 11 between a solar collector module 2 and a heat transport system 3 with a pipeline 7, which is preferably again formed by a metal tube 22 and provided with a thermal barrier coating 23 on its outer circumference. In this embodiment of the heat transport system 3, the heat collecting surface 15 is formed by the outer surface of the pipe 7 and therefore not formed by a flat surface as in the previous embodiments but has the shape of a cylinder portion. This eliminates the production of its own separate heat collecting surface 15 by flattening or attaching a suitable profile. Through the recess 34 in the heat-insulating layer 23, the heat-conducting element 13 of the solar collector module 2 can be brought into contact and detachable contact with the heat-collecting surface 15 with its contact surface 14. The heat-conducting connection of the heat-conducting element 13 to the absorber element 8, not shown, takes place in this embodiment again by means of a connecting element 19 made of metal. The contact surface 14 opposite the back of the heat-conducting element 13 and the connecting element 19 are to avoid heat loss back in one

Body 20 embedded with poor thermal conductivity or directly wrapped with thermal insulation material 21. The shape of the base body 20 or the thermal insulation material 21 is in this area complementary to the recess 34 in the thermal barrier coating 23, resulting in a continuous thermal insulation for the interface 11 when the solar collector module 2 is mounted. The contact surface 14 of the Wärmeleitelements is to a good

Heat transfer to the pipe 7 to ensure, also cylindrical section and formed with the same radius of curvature as the heat collecting surface 15 on the outer surface of the pipe 7. 8 shows a cross section through a further embodiment of an interface 11 between a solar collector module 2 and a heat transport system 3. A straight pipe section 26 of the heat transport system 3 is formed here by a pipe in the form of a plastic tube 45, which due to the poor thermal conductivity of the plastic itself, the thermal barrier coating 23 of the pipe 7 represents. The plastic pipe is produced by an extrusion process and, as shown in FIG. 8, may have approximately rectangular cross-section and have flange-like fastening extensions 46 for easier assembly. The heat collecting surface 15 is formed in this embodiment by one or more insert elements 47 made of metal, whose outer surfaces relative to the Plastic pipe 45 protrude slightly outside and the inner sides of the heat transfer fluid 6 adjacent. The metallic insert element 47 has a good thermal conductivity, whereby a good heat transfer to the heat transfer fluid 6 can take place from the contact surface 14. The insert element 47 may extend in the shape of a strip in the longitudinal direction of the plastic tube 45 or else be formed by a multiplicity of relatively short rectangular or round metal platelets. The one or more insert elements 47 may be incorporated in the course of an extrusion process or else subsequently inserted into corresponding openings in the plastic tube 45. With regard to the embodiment of the solar collector module reference is made at this point to the embodiments described above. Due to the shape of the base body 20 with poor thermal conductivity material or the use of thermal insulation material 21, the interface 11 is enveloped in this embodiment with material with poor thermal conductivity, whereby heat losses are largely avoided. The embodiment of the insert elements 47 in the form which project their heat collecting surfaces 15 with respect to the outer surface of the plastic pipe 45 also reduces the thermal loading of the plastic pipe 45, which is why materials with lower service temperatures can be used for this purpose.

9 shows a cross section through a further embodiment of a solar collector system 1 with use of a heat pipe 48, frequently also referred to as a heat pipe, in the solar collector module 2. The structure is similar to the embodiment according to FIG. 3, wherein in a cavity 29 a heat pipe 48 is arranged in the solar collector module 2, which contains a liquid in its interior and extends from an evaporation zone 49 adjacent to the absorber element 8 to a condensation zone 50 adjacent to the heat-conducting element 13. The liquid contained in the heat pipe 48 is vaporized in the region of the evaporation zone 49 by the hot absorber element 8 and condenses with heat release to the heat-conducting element 13 in the condensation zone 50. The condensed liquid is then returned to the evaporation zone, for example by gravity. The heat pipe 48 thus serves as the connecting element for improving the heat transfer between the absorber element 8 and the heat-conducting element 13.

9 further shows that the solar collector module 2 can also comprise a transparent covering element 51 which covers the absorber element 8 on the outside facing the solar radiation and thereby significantly reduces its heat emission to the outside environment can, whereby the recorded and can be dissipated to the heat transport system 3 heat energy can be significantly increased. The covering element 51 may be formed, for example, by a glass panel 52 and may be held by the base body 20 or else by a housing 53 of the solar collector module 2.

Such a cover 51 may of course be provided in the embodiments described with reference to the other figures.

The solar collector module 2 can be used in addition to the recovery of thermal energy at the same time or alternatively for the photovoltaic extraction of electrical energy, if it also includes a solar cell array 51, which is part of the cover 51, for example, as in the embodiment of FIG.

The embodiments show possible embodiments of the solar collector system, it being noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but also various combinations of the individual embodiments are possible with each other and this possibility of variation due to the teaching of technical action by representational Invention in the skill of those skilled in this technical field. Thus, all conceivable variants of the invention which are possible by combinations of individual details of the illustrated and described embodiment variant are also included in the scope of protection.

For the sake of order, it should finally be pointed out that, for a better understanding of the construction of the solar collector system, this or its components have been shown partially unevenly and / or enlarged and / or reduced in size.

The task underlying the independent inventive solutions can be taken from the description.

Above all, the individual in Figs. 1; 2; 3; 4, 5, 6; 7; 8th; 9 embodiments form the subject of independent solutions according to the invention. The relevant Chen, tasks and solutions according to the invention can be found in the detailed descriptions of these figures.

Reference Signs Solar Collector System 41 Cavity

Solar collector model 42 Fastening system Heat transport system 43 Opening

Substructure 44 Width

Solar radiation 45 Plastic pipe Heat transfer fluid 46 Fastening piping 47 Insert element Absorber element 48 Heat pipe

Outer side 49 Evaporation zone Selective coating 50 Condensation zone Interface 51 Cover element Rear side 52 Glass panel

Wärmeleitelement 53 housing

Contact surface 54 Solar cell arrangement Heat collecting surface

distance

Rear face

thickness

connecting element

body

thermal insulation material

metal pipe

thermal barrier

roofing

distance

Pipeline section

carrier profile

end

cavity

Heat transfer fluid

angle beam

Einhängevorsprung

distance

recess

arrow

joint

Connector element

thermal barrier

thermal insulation element

U-profile

Claims

Patent claims

1. Solar collector module (2) for arrangement on a substructure (4), in particular on the roof or the facade of a building, comprising an absorber element (8) which can be charged with solar radiation (5) and an interface (11) formed by a heat-conducting element (14) on the rear side (12) of the solar collector module (2) facing the substructure (4) for transferring heat energy between the solar collector module (2) and a heat transport system (3) arranged on the substructure (4) or forming a substructure (4) in that the interface (11) comprises at least one contact surface (14) which can be brought into contact with the heat transport system (3) in contact and releasable contact with the heat-conducting element (14).

2. Solar collector module (2) according to claim 1, characterized in that the contact surface (14) of the rear side surface (17) of the absorber element (8) in the direction of the thickness (18) of the solar collector module (2), in particular by a distance (16). , which corresponds to a multiple of the thickness of the absorber element (8), is arranged at a distance.

3. solar collector module (2) according to claim 1 or 2, characterized in that the absorber element (8) and / or the heat-conducting element (13) for the most part of a material or a material combination selected from a group comprising at least copper, aluminum, steel, Stainless steel, plastic, carbon nanotubes exists.

4. solar collector module (2) according to one of claims 1 to 3, characterized

, characterized in that the absorber element (8) and the heat-conducting element (13) are connected in one piece or with a connecting element (19) made of a material having a thermal conductivity of at least 15 W / mK, in particular of metal, and the connecting element (19) as its own Part formed or by at least a portion of the absorber element (8) and / or the heat conducting element (13) is formed.

5. Solar collector module (2) according to one of claims 1 to 3, characterized in that the absorber element (8) and the heat-conducting element (13) extending to a extending between these, in the interior of the solar collector module (2) and with a heat transfer fluid (30 ) filled cavity (29).

6. Solar collector module (2) according to one of claims 1 to 5, characterized in that the absorber element (8) on its not irradiated by solar radiation (5) rear side (17) and the heat-conducting element (13) outside of the heat transport system (3) Contact surface (14) of a thermal insulation material (21) with a thermal conductivity of a maximum of 0.1 W / mK are surrounded or enveloped.

7. Solar collector module (2) according to one of claims 4 to 6, characterized in that the connecting element (19) or the cavity of a thermal insulation material (21) with a thermal conductivity of a maximum of 0.1 W / mK are surrounded or enveloped.

8. Solar collector module (2) according to claim 6 or 7, characterized in that the thermal insulation material (21) comprises mineral fibers and / or mineral foam.

9. Solar collector module (2) according to one of the preceding claims, characterized in that the absorber element (8) and the heat-conducting element (13) are arranged on a supporting base body (20) made of material having a thermal conductivity of at most 1.5 W / mK.

10. Solar collector module (2) according to claim 9, characterized in that the thermal conductivity of the absorber element (8) and the heat-conducting element (13) is at least ten times higher than the thermal conductivity of the base body (20), wherein in particular the thermal conductivity of the absorber element (8) and of the heat-conducting element (13) is greater than 40 W / mK, and the thermal conductivity of the material constituting the base body (20) is less than 1 W / mK.

11. Solar collector module (2) according to claim 9 or 10, characterized in that the base body (20) is produced by a primary molding process, in particular an injection molding process or an extrusion process.

12. Solar collector module (2) according to any one of the preceding claims, characterized in that the absorber element (8) and / or the heat-conducting element (13) ren with a forming process, in particular Zugdruckumformverfahren or a Biegeumformverfah-, or a roll-bonding process from Sheet metal blanks are made.

13. Solar collector module (2) according to one of the preceding claims, characterized in that the absorber element (8) on the outside of the solar collector module (2) with a solar radiation (5) at least partially transparent cover member (51) is covered.

14. Solar collector module (2) according to one of the preceding claims, characterized in that the solar collector module (2) comprises a photovoltaically active solar cell arrangement (54).

15. Solar collector module (2) according to one of the preceding claims, characterized in that the absorber element (8) and the heat-conducting element (13) are connected to a heat pipe (48).

16. Heat transport system (3) for the transfer of heat from or to solar koUektormodulen (2), comprising one of a heat transfer fluid (6) through, at least partially straight running pipe (7) with at least one interface (11) for heat transfer, characterized in that the interface (11) can be brought into contact with at least one solar collector module (2) which can be brought into surface contact and releasable contact with a heat pipe surface (15) made of a material with a thermal conductivity of at least 15 W and arranged on a straight pipe section (26) / mK, in particular of metal, is formed

17. Heat transport system (3) according to claim 16, characterized in that the pipe (7) has on its outer circumference a thermal barrier coating (23) which is interrupted in the region of the heat collecting surface (15).

18. Heat transport system (3) according to claim 16 or 17, characterized in that the heat collecting surface (15) extends over a majority of the length of a straight pipe section (26).

19. Heat transport system (3) according to any one of claims 16 to 18, characterized in that a provided with a heat collecting surface (15) straight Rohrlei tion- portion (26) is formed by a metal tube (22) on which a thermal barrier coating (23) is attached by an extrusion process.

20. Heat transport system (3) according to any one of claims 16 to 19, character- ized in that the straight pipe section (26) by an extruded plastic tube (45) having at least one heat collecting surface (15) on an insert element (47) made of a material with a thermal conductivity of at least 15 W / mK, in particular of metal, is formed.

21. Solar collector system (1) comprising a heat transport system (3) with a

Heat transfer fluid (6), a plurality of solar collector modules (2) each having an absorber element (8) and an interface (11) for transmitting heat energy between the solar collector modules (2) and the heat transport system (3), characterized in that the solar collector modules (2) one of claims 1 to 15 are formed, the heat transport system (3) according to one of claims 16 to 20 is formed and the heat-conducting elements (13) surface contact and releasably in contact with the Wärmesammeiflächen (15).

22. Solar collector system (1) according to claim 21, characterized in that the heat transport system (3) comprises an array of parallel and in, preferably regular, spacing (25) mutually extending horizontal pipe sections (26) and each solar collector module (2) at at least one of these pipe sections (26) with a heat-conducting element (13) contacting the heat-collecting surface (15) in a surface-contact and detachable manner.

23. Solar collector system (1) according to claim 22, characterized in that the pipe sections (26) are carried out statically stable and the solar collector modules (2) on its rear side (12) Einhängevorsprünge (32) for suspension to the pipe sections (26).

24. Solar collector system (1) according to claim 23, characterized in that the heat-conducting elements (13) are arranged on the suspension projections (32) of the solar collector modules (2).

25. Solar collector system (1) according to claim 21, characterized in that the

Heat transport system (3) comprises an arrangement of parallel and preferably at regular intervals (33) parallel to each other extending pipe sections (26) in the fall line on a roof construction or facade construction and the solar collector modules (2) the horizontal distance (33) between two adjacent pipe sections ( 26) and with two spaced apart in the horizontal direction Wärmeleitflächen (14) at two adjacent pipe sections (26) in surface contact and detachable contact with their Wärmesammeiflächen (15).

26. Solar collector system (1) according to one of claims 21 to 25, characterized in that along a straight pipe section (26) a plurality of solar collector modules (2) are arranged adjacent to each other or overlapping, wherein the heat-conducting elements (13) of the solar collector modules (2) at least approximately Cover entire heat collecting surface (15) at this pipe section (26).

27. Solar collector system (1) according to one of claims 21 to 25, characterized in that the heat-conducting surfaces (14) of the heat-conducting elements (13) and the heat collecting surface (15) of the heat transport system (3) are designed as flat surfaces.

28. Solar collector system (1) according to one of claims 21 to 26, characterized in that the heat-conducting element (13) has a cylinder-shaped contact surface (14).

29, solar collector system (1) according to any one of claims 21 to 28, characterized in that the mutually contacting heat conducting elements (13) of the solar collector modules (2) and the heat collecting surfaces (15) of the heat transport system (3) except in the connections to Solar collector element (2) or to the pipe section (26) by thermal insulation material (21) or a thermal barrier coating (23) are enveloped.

30. Solar collector system (1) according to any one of claims 21 to 29, characterized in that in one of the heat transport system (3) mounted solar collector module (2) a thermal insulation material (21) surrounding the heat-conducting element (13) is pressed against the heat-insulating layer (23) of the heat-transport system (3).

31. Solar collector system (1) according to any one of claims 21 to 30, characterized in that on the heat-conducting elements (13) or on the heat collecting surfaces (15) fastening extensions (42) in the form of hooks, tongues, pins or the like are formed, which in the assembled state engage positively in openings (43) on the heat collecting surfaces (15) or on the heat conducting elements (13).

32. Solar collector system (1) according to any one of claims 21 to 31, characterized in that the mounted solar collector modules (2) form a roof tile-like roofing or a flat facade outer skin.

33. Use of a solar collector module (2) according to any one of claims 1 to 15 and a heat transport system (3) according to any one of claims 16 to 20 or a solar collector system (1) according to any one of claims 21 to 32 for the absorption of solar energy and ambient heat and supply in a heat cycle or the release of heat from a cooling circuit to the environment.