EP2823238A1 - A solar collector and solar panel with solar cells for the roof of a building - Google Patents

A solar collector and solar panel with solar cells for the roof of a building

Info

Publication number
EP2823238A1
EP2823238A1 EP13757502.3A EP13757502A EP2823238A1 EP 2823238 A1 EP2823238 A1 EP 2823238A1 EP 13757502 A EP13757502 A EP 13757502A EP 2823238 A1 EP2823238 A1 EP 2823238A1
Authority
EP
European Patent Office
Prior art keywords
solar
modules
solar collector
roof
pipes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP13757502.3A
Other languages
German (de)
French (fr)
Other versions
EP2823238A4 (en
Inventor
Lars A. Bergkvist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2823238A1 publication Critical patent/EP2823238A1/en
Publication of EP2823238A4 publication Critical patent/EP2823238A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40—Thermal components
    • H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • F24S10/72—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits being integrated in a block; the tubular conduits touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/60—Solar heat collectors integrated in fixed constructions, e.g. in buildings
    • F24S20/67—Solar heat collectors integrated in fixed constructions, e.g. in buildings in the form of roof constructions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/20—Supporting structures directly fixed to an immovable object
    • H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
    • H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
    • H02S20/25—Roof tile elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/44—Heat exchange systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/60—Thermal-PV hybrids

Definitions

  • the present invention relates to a roof for absorbing solar energy.
  • the invention is particularly suitable for a building with a roof with roofing tiles, but is not limited to such embodiment.
  • the invention is intended for single- family houses and corresponding smaller buildings, but is also applicable in larger buildings with roofing tiles.
  • Solar collectors are known with many different designs. Most solar collectors are designed for on-roof assembly, with a certain angle in relation to the horizontal plane, which does not correspond to the inclination of the roof in relation to the horizontal plane. A problem is that this results in that the solar collectors are aesthetically less appealing.
  • One common type of solar collector comprises relatively flat panels, wherein a pipe runs back and forth on a sheet, and wherein the pipe on one panel is connected in series or in parallel with a neighboring panel, so that a number of panels cooperate.
  • the panels may be made from metal or plastic.
  • solar panels with solar cells for transforming solar light into electrical energy.
  • solar panels are available for mounting on roofs.
  • a problem with such solar panels is that the efficiency decreases at higher temperatures, such as exceeding for instance 80 °C. During sunny weather, and in particular during the summer, this is a problem.
  • the present invention solves the latter problem, and offers a device for generating both hot water and electricity with high efficiency.
  • the present invention relates to a solar collector and solar panel with solar cells for the roof of a building, which solar collector is arranged to, using solar energy, heat water which is supplied to the solar collector and which, via channels or pipes, runs through the solar collector, wherein the solar collector is arranged to supply heated water to the water pipe system of the building, and is char- acterised in that the solar collector comprises modules of massive material, in that the modules are provided with one or several channels or pipes running inside the modules, in that the material of the modules has a thermal capacity which at least corresponds to a black rubber material, and in that the exterior of the solar collector comprises translucent roofing tiles with a size corresponding to conventional brick roofing tiles, and in that solar panels for generating electrical energy are arranged on the side of the modules facing the roofing tiles.
  • FIG. 3 shows a cross-section of a solar collector according to the invention
  • FIG. 4 shows modules between roof laths, running on a roof in the direction of the sloping of the roof
  • FIG. 5 schematically shows a block diagram and a flow circuit .
  • FIG. 1 a part of a solar collector and solar panel with solar cells for a building with a roof with roofing tiles, below denoted solar collector, is schematically shown.
  • the solar collector is arranged to heat water using solar energy, which water is supplied to the solar collector and which, via channels or pipes, flow through the solar collector, where the solar collector is arranged to supply heated water to the water work system of the building.
  • the invention is described for the case in which the building has a tiled roof, but the invention is not limited to such a case.
  • the solar collector comprises modules 1 with a width corresponding to the distance between roof laths 2, 3, running from the ridge to the base of the roof and with a height corresponding to the thickness of said roof laths 2, 3.
  • the modules 1 are made of solid material and are provided with one or several channels 4, 5, 6, running within the modules in a direction which is parallel to the said roof laths.
  • the material of the modules is selected so that the material has a relatively high heat capacity, so that the material after heating can emit heat when the solar radiation influx is weak.
  • An example of materials is a black rubber material of the type used in conveyor belts, such as ore conveyor belts. Of course, other suitable known materials can also be used.
  • the exterior of the solar collector comprises translucent tiles 7 with a size corresponding to conventional brick roofing tiles.
  • a module 1 is illustrated lying on a roof 8 between two roof laths 2, 3.
  • the said translucent tiles 7 are made of glass. These tiles have the same shape as conventional brick tiles. Conventional brick tiles have a small number of standardized shapes. In the figures, the tiles 7 are illustrated with a so called double pantile (sv. "tvakupig") shape.
  • the channels 4, 5, 6 of the modules 1 are constituted by tube-shaped channels within the modules 1, and that channels of adjacent modules 1 are joined together by pipes 10, 11, 12, inserted some distance into the respec- tive module, as illustrated in figure 4, in which the said pipes are shown using broken lines.
  • the pipes 10, 11, 12 are sealed to the respective module.
  • modules 1 can be positioned from roof base to roof ridge, and can be connected to each other using said pipes.
  • the said channels in the modules 1 are constituted by pipes 13, 14, 15 with a length corresponding to the total length of the modules 1 in the direction of the roof sloping.
  • Such pipes have an outer diameter corresponding to the diameter of the channels.
  • the modules 1 are made in a separated fashion, as is illustrated by the broken line 18 in figure 3.
  • a chamfer is thereby provided, which corresponds to the external diameter of the pipes 4, 5, 6 when the module halves are positioned next to each other.
  • the said pipes are constituted by a corrosion resistant material, such as copper or aluminum.
  • the said channels 4, 5, 6 or pipes running inside the channels are connected at the roof ridge and roof base, so that a flow circuit 19 is formed, which is connected to the water work system of the building in a suitable known manner.
  • the flow circuit 19 can be connected to a heat exchanger 20 in the building, where the heat of the water is heat exchanged to a heat exchanger which is part of a flow circuit in the building, see figure 5.
  • the existing roofing tiles are removed from places in which modules are to be mounted, after which translucent tiles are positioned in locations where the regular tiles have been removed. This achieves a flat roof corresponding to the one present before the mounting of modules and translucent tiles. Furthermore, it is not necessary to reinstall or modify the roofing laths.
  • the modules 1 are made from a material with high heat capacity, these will accumulate thermal energy from solar incident radiation. Hereby, the thermal energy in the modules are transferred to the water flowing in the modules, whereby heated water can be led to the said heat exchanger 20.
  • An adaptation of the number of modules takes place as a function of the desired volume of heated water.
  • solar panels 16 for generating electrical energy on the side of the modules 1 facing the roofing tile 7.
  • the solar panels are of suitable known type.
  • Each solar panel is provided with electrical conductors 17 for being connected to each other and to a place of consumption of electrical current.
  • the solar panels 16 are connected to the ordinary electricity supply network in order to deliver current to the electricity supply network.
  • the efficiency of the solar cells decreases as the temperature becomes too high, for instance 80 °C.
  • the temperature at which the efficiency decreases varies across different solar cells.
  • the solar panels 16 Since the solar panels 16 are arranged directly on the modules, being cooled by the water in the flow circuit 19, the solar panels 16 will also be cooled so that their efficiency can be maintained.
  • the solar panels are protected by the translucent roofing tiles.
  • the modules may assume a temperature during sunny weather, especially during the summer, which is so high so that the efficiency of the solar panels decreases.
  • the flow circuit 19, formed of the said channels or pipes 4, 5, 6, is therefore selectively connectable to a cooler 23, arranged to cool heated water in the flow circuit.
  • a cooler 23 can be connected to the conduits 24, 25 of the flow circuit 19 to the said heat exchanger via valves 26, 27.
  • the valves are so arranged so that the flow circuit is connected to the said heat exchanger 20 or to the cooler 23, or to both.
  • a temperature sensor 28 for measuring the temperature in the flow circuit 19.
  • a control circuit 21 is also provided, arranged to control a pump 22, in turn arranged to pump water through the flow circuit 19 depending upon the temperature of the water, so that the temperature does not rise above a predetermined temperature.
  • the predetermined temperature is the highest at which the solar panels have an acceptable efficiency.
  • the present invention solves the initially mentioned problems .
  • a module system has been described.
  • the present invention can be implemented with a different system than a module system, such as a system in which the said rubber material with internal pipes is positioned on a complete roof before lathing is installed on the roof, and wherein the solar panels are positioned between the laths.
  • the invention may be varied, for example also as regards the number of channels in the modules, choice of pipe material, etc .

Abstract

A solar collector and solar panel with solar cells for the roof of a building, which solar collector is arranged to, using solar energy, heat water which is supplied to the solar collector and which, via channels or pipes, runs through the solar collector, wherein the solar collector is arranged to supply heated water to the water pipe system of the building. The invention is characterised in that the solar collector comprises modules (1) of massive material, in that the modules are provided with one or several channels (4,5,6) or pipes running inside the modules, in that the material of the modules (1) has a thermal capacity which at least corresponds to a black rubber material, and in that the exterior of the solar collector comprises translucent roofing tiles (7) with a size corresponding to conventional brick roofing tiles, and in that solar panels for generating electrical energy are arranged on the side of the modules facing the roofing tiles.

Description

A SOLAR COLLECTOR AND SOLAR PANEL WITH SOLAR CELLS FOR
THE ROOF OF A BUILDING
The present invention relates to a roof for absorbing solar energy. The invention is particularly suitable for a building with a roof with roofing tiles, but is not limited to such embodiment. Foremost, the invention is intended for single- family houses and corresponding smaller buildings, but is also applicable in larger buildings with roofing tiles. Solar collectors are known with many different designs. Most solar collectors are designed for on-roof assembly, with a certain angle in relation to the horizontal plane, which does not correspond to the inclination of the roof in relation to the horizontal plane. A problem is that this results in that the solar collectors are aesthetically less appealing.
One common type of solar collector comprises relatively flat panels, wherein a pipe runs back and forth on a sheet, and wherein the pipe on one panel is connected in series or in parallel with a neighboring panel, so that a number of panels cooperate. The panels may be made from metal or plastic.
One problem is that such solar collectors have a heat capacity, for storing heat, which as such is very small. Therefore, the panels are cooled relatively quickly when water which has not been heated is supplied to the panels.
There are also solar panels with solar cells for transforming solar light into electrical energy. Such solar panels are available for mounting on roofs. A problem with such solar panels is that the efficiency decreases at higher temperatures, such as exceeding for instance 80 °C. During sunny weather, and in particular during the summer, this is a problem.
The present invention solves the latter problem, and offers a device for generating both hot water and electricity with high efficiency.
Hence, the present invention relates to a solar collector and solar panel with solar cells for the roof of a building, which solar collector is arranged to, using solar energy, heat water which is supplied to the solar collector and which, via channels or pipes, runs through the solar collector, wherein the solar collector is arranged to supply heated water to the water pipe system of the building, and is char- acterised in that the solar collector comprises modules of massive material, in that the modules are provided with one or several channels or pipes running inside the modules, in that the material of the modules has a thermal capacity which at least corresponds to a black rubber material, and in that the exterior of the solar collector comprises translucent roofing tiles with a size corresponding to conventional brick roofing tiles, and in that solar panels for generating electrical energy are arranged on the side of the modules facing the roofing tiles.
Below, the invention is described in closer detail, partly in connection with an exemplary embodiment of the invention as illustrated on the appended drawings, wherein - figure 1 shows a tile belonging to the invention
- figure 2 shows a module belonging to the invention
- figure 3 shows a cross-section of a solar collector according to the invention - figure 4 shows modules between roof laths, running on a roof in the direction of the sloping of the roof
- figure 5 schematically shows a block diagram and a flow circuit .
In figures 1 and 2, a part of a solar collector and solar panel with solar cells for a building with a roof with roofing tiles, below denoted solar collector, is schematically shown. The solar collector is arranged to heat water using solar energy, which water is supplied to the solar collector and which, via channels or pipes, flow through the solar collector, where the solar collector is arranged to supply heated water to the water work system of the building. Below, the invention is described for the case in which the building has a tiled roof, but the invention is not limited to such a case.
According to a preferred embodiment of the invention, the solar collector comprises modules 1 with a width corresponding to the distance between roof laths 2, 3, running from the ridge to the base of the roof and with a height corresponding to the thickness of said roof laths 2, 3. The modules 1 are made of solid material and are provided with one or several channels 4, 5, 6, running within the modules in a direction which is parallel to the said roof laths.
The material of the modules is selected so that the material has a relatively high heat capacity, so that the material after heating can emit heat when the solar radiation influx is weak. An example of materials is a black rubber material of the type used in conveyor belts, such as ore conveyor belts. Of course, other suitable known materials can also be used.
The exterior of the solar collector comprises translucent tiles 7 with a size corresponding to conventional brick roofing tiles.
In figure 3, a module 1 is illustrated lying on a roof 8 between two roof laths 2, 3. On top of the laths 2, 3, there are, such as is conventional, a number of mutually parallel roof laths 9, running perpendicularly to the said laths 2, 3, and with the purpose of supporting roof tiles.
According to a preferred embodiment, the said translucent tiles 7 are made of glass. These tiles have the same shape as conventional brick tiles. Conventional brick tiles have a small number of standardized shapes. In the figures, the tiles 7 are illustrated with a so called double pantile (sv. "tvakupig") shape.
It is preferred that the channels 4, 5, 6 of the modules 1 are constituted by tube-shaped channels within the modules 1, and that channels of adjacent modules 1 are joined together by pipes 10, 11, 12, inserted some distance into the respec- tive module, as illustrated in figure 4, in which the said pipes are shown using broken lines. The pipes 10, 11, 12 are sealed to the respective module.
Hence, modules 1 can be positioned from roof base to roof ridge, and can be connected to each other using said pipes.
An alternative preferred embodiment is that the said channels in the modules 1 are constituted by pipes 13, 14, 15 with a length corresponding to the total length of the modules 1 in the direction of the roof sloping. Such pipes have an outer diameter corresponding to the diameter of the channels. During assembly, such pipes are pushed through the used number of modules. Alternatively, the modules 1 are made in a separated fashion, as is illustrated by the broken line 18 in figure 3. In the bottom and upper part, respectively, of the module, a chamfer is thereby provided, which corresponds to the external diameter of the pipes 4, 5, 6 when the module halves are positioned next to each other.
Furthermore, it is preferred that the said pipes are constituted by a corrosion resistant material, such as copper or aluminum.
The said channels 4, 5, 6 or pipes running inside the channels are connected at the roof ridge and roof base, so that a flow circuit 19 is formed, which is connected to the water work system of the building in a suitable known manner. The flow circuit 19 can be connected to a heat exchanger 20 in the building, where the heat of the water is heat exchanged to a heat exchanger which is part of a flow circuit in the building, see figure 5. During assembly of a number of modules, the existing roofing tiles are removed from places in which modules are to be mounted, after which translucent tiles are positioned in locations where the regular tiles have been removed. This achieves a flat roof corresponding to the one present before the mounting of modules and translucent tiles. Furthermore, it is not necessary to reinstall or modify the roofing laths. Since the modules 1 are made from a material with high heat capacity, these will accumulate thermal energy from solar incident radiation. Hereby, the thermal energy in the modules are transferred to the water flowing in the modules, whereby heated water can be led to the said heat exchanger 20. An adaptation of the number of modules takes place as a function of the desired volume of heated water.
According to the invention, there are also solar panels 16 for generating electrical energy on the side of the modules 1 facing the roofing tile 7. The solar panels are of suitable known type. Each solar panel is provided with electrical conductors 17 for being connected to each other and to a place of consumption of electrical current. Suitably, the solar panels 16 are connected to the ordinary electricity supply network in order to deliver current to the electricity supply network.
As mentioned initially, the efficiency of the solar cells decreases as the temperature becomes too high, for instance 80 °C. The temperature at which the efficiency decreases varies across different solar cells.
Since the solar panels 16 are arranged directly on the modules, being cooled by the water in the flow circuit 19, the solar panels 16 will also be cooled so that their efficiency can be maintained. The combination of modules 1, absorbing heat from the sunlight and being cooled by the flow circuit 19, and solar panels 16, generating electricity using the sunlight and abutting against the modules 1, hence results in that both heat and electricity are generated at a high efficiency .
Moreover, the solar panels are protected by the translucent roofing tiles.
However, and as initially remarked, the modules may assume a temperature during sunny weather, especially during the summer, which is so high so that the efficiency of the solar panels decreases.
According to a preferred embodiment, the flow circuit 19, formed of the said channels or pipes 4, 5, 6, is therefore selectively connectable to a cooler 23, arranged to cool heated water in the flow circuit. Hereby, the temperature in the flow circuit and therefore the temperature of the solar panels, can be lowered to a level at which the efficiency of the solar panels is high. The cooler 23 can be connected to the conduits 24, 25 of the flow circuit 19 to the said heat exchanger via valves 26, 27. The valves are so arranged so that the flow circuit is connected to the said heat exchanger 20 or to the cooler 23, or to both.
According to another preferred embodiment, there is a temperature sensor 28 for measuring the temperature in the flow circuit 19. A control circuit 21 is also provided, arranged to control a pump 22, in turn arranged to pump water through the flow circuit 19 depending upon the temperature of the water, so that the temperature does not rise above a predetermined temperature. The predetermined temperature is the highest at which the solar panels have an acceptable efficiency.
Thus, the present invention solves the initially mentioned problems .
Above, a number of embodiments have been described. In particular, a module system has been described. However, the present invention can be implemented with a different system than a module system, such as a system in which the said rubber material with internal pipes is positioned on a complete roof before lathing is installed on the roof, and wherein the solar panels are positioned between the laths. The invention may be varied, for example also as regards the number of channels in the modules, choice of pipe material, etc .
Therefore, the present invention is not to be considered limited to the above described embodiments, but may be varied within the scope of the enclosed claims.

Claims

Claims
1. A solar collector and solar panel with solar cells for the roof of a building, which solar collector is arranged to, using solar energy, heat water which is supplied to the solar collector and which, via channels or pipes, runs through the solar collector, wherein the solar collector is arranged to supply heated water to the water pipe system of the building, wherein the solar collector comprises modules (1) of massive material, the modules bring provided with one or several channels (4,5,6) or pipes running inside the modules, wherein the material of the modules (1) has a thermal capacity which at least corresponds to a black rubber material of the type used in conveyor belts so that the material after heating can emit heat while the solar radiation influx is weak, and wherein the exterior of the solar collector comprises translucent roofing tiles (7) with a size corresponding to conventional brick roofing tiles, and wherein solar panels for generating electrical energy are arranged on the side of the modules facing the roofing tiles, c h a r a c t e r i s e d i n that a flow circuit (19) , formed by the said channels or pipes (4,5,6) is selectively connectable to a cooler (23), arranged to cool heated water in the flow circuit.
2. A solar collector and solar panel according to claim 1, c h a r a c t e r i s e d i n that a temperature sensor (28) is arranged to measure the temperature in the flow circuit (19) , and in that a control circuit (21) is arranged to control a pump (22) arranged to pump liquid through the flow circuit (19) depending on the temperature in the said liquid so that the temperature does not rise above a predetermined temperature .
3. A solar collector and solar panel according to claim 1 or 2, c h a r a c t e r i s e d i n that the solar collector comprises modules (1) with a width corresponding to the distance between roof laths (2,3), running from the ridge to the base of the roof and with a height corresponding to the thickness of said roof laths (2,3), in that the modules (1) are made of solid material, and in that the modules are provided with one or several channels (4,5,6), or pipes running within the modules in a direction which is parallel to the said roof laths (2,3) .
4. A solar collector and solar panel according to claim 5, c h a r a c te r i s e d i n that the material of the modules (1) has a high thermal capacity, at least corresponding to a rubber material of the type used in conveyor belts.
5. A solar collector and solar panel according to any one of the preceding claims, ch a r a c te r i s e d i n that the said tiles (7) are made of glass.
6. A solar collector and solar panel according to any one of the preceding claims, cha r a c te r i s e d i n that the channels (4,5,6) of the modules (1) are comprised by tube- shaped channels within the modules, and in that channels of adjacent modules are joined together using pipes (10,11,12) inserted a certain distance into the respective module (1) .
7. A solar collector and solar panel according to any one of the preceding claims, ch a r a c te r i s e d i n that the said pipes (13, 14, 15; 10, 11, 12) are made from a corrosion resistant material, such as copper or aluminum.
EP13757502.3A 2012-03-08 2013-03-08 A solar collector and solar panel with solar cells for the roof of a building Withdrawn EP2823238A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1250216A SE537409C2 (en) 2012-03-08 2012-03-08 Ceiling for absorbing solar energy
PCT/SE2013/050208 WO2013133760A1 (en) 2012-03-08 2013-03-08 A solar collector and solar panel with solar cells for the roof of a building

Publications (2)

Publication Number Publication Date
EP2823238A1 true EP2823238A1 (en) 2015-01-14
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SE537409C2 (en) 2015-04-21
EP2823238A4 (en) 2015-10-14
WO2013133760A1 (en) 2013-09-12

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