WO1992014103A1 - Solar collector and method for manufacturing the same - Google Patents

Solar collector and method for manufacturing the same Download PDF

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Publication number
WO1992014103A1
WO1992014103A1 PCT/SE1991/000081 SE9100081W WO9214103A1 WO 1992014103 A1 WO1992014103 A1 WO 1992014103A1 SE 9100081 W SE9100081 W SE 9100081W WO 9214103 A1 WO9214103 A1 WO 9214103A1
Authority
WO
WIPO (PCT)
Prior art keywords
casing
absorber
collector according
mutually
channel
Prior art date
Application number
PCT/SE1991/000081
Other languages
French (fr)
Inventor
Göran Bolin
Gunnar Wilson
Original Assignee
Bolin Goeran
Gunnar Wilson
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
Priority to SE8902695A priority Critical patent/SE467548B/en
Application filed by Bolin Goeran, Gunnar Wilson filed Critical Bolin Goeran
Priority to PCT/SE1991/000081 priority patent/WO1992014103A1/en
Priority to DE4193450T priority patent/DE4193450T1/en
Publication of WO1992014103A1 publication Critical patent/WO1992014103A1/en

Links

Classifications

    • 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
    • F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
    • 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
    • F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
    • F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S2025/6007—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules by using form-fitting connection means, e.g. tongue and groove
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/80—Accommodating differential expansion of solar collector elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/16—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes extruded
    • 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

Definitions

  • the present invention relates to a solar energy collec ⁇ tor and to a method for its manufacture, as defined in the preambles of respective independent Claims.
  • An object of the present invention is to enable known solar energy collectors to be manufactured, mounted and installed in a simpler and less expensive manner than was possible hitherto. This object is fulfilled with an inventive solar energy collector and an inventive method having the characteristic features set forth in the characterizing clauses of respective independent Claims.
  • Figure 1 illustrates schematically and in perspective a plurality of solar energy collectors connected together in accordance with a first embodiment of the invention
  • Figure 2 is a cross-sectional view of two mutually connected collectors shown in Figure 1;
  • Figure 3 is a schematic top view of a plurality of collectors according to another embodiment of the inven ⁇ tion;
  • Figure 4 is a schematic sectional view taken on the line IV-IV in Figure 3;
  • Figure 5 is an enlarged view, partly in section, of elements included in the collector arrangement of Figure 3 and Figure 4;
  • Figure 6 is a sectional view taken on the line VI-VI in Figure 5.
  • Each solar energy collector of the mutually coupled collectors illustrated in Figures 1 and 2 is comprised of a casing 1, an absorber channel 2 and connections leading to a device 3 for recovery of the heat generated in the collector and to a vacuum pump 4 for evacuating air from the collector.
  • the casing 1 is comprised partly of a hollow, elongated section 5 in the form of a tube of circular or generally circular cross-section, so as to give the casing the maximum radial strength and to ensure that it will not collapse as a result of the subpressure prevailing therein, and partly of two end closure devices in the form of circular caps 6 and 7 which are either glued or welded to the ends of the sections and which are preferably made of plastic material.
  • a hollow strip 8 which incorporates the channel 2, which consists of two part channels 2a, 2b and contains pig- mented absorber fluid (e.g. black fluid) is enclosed in the casing 1 and has the same axial extension as the casing and a radial extension which is almost equal to the radial extension of the casing.
  • the band 8 is connected to the casing 1 by means of a strip 9, which also has the same axial extension as the casing.
  • the bar 8 is mounted generally centrally in the casing 1 and is connected thereto solely by the strip 9, so as to maximize heat absorption and minimize heat losses.
  • elongated channel-like elements 10, 11 and 12 Fitted to the outside of the casing 1 are elongated channel-like elements 10, 11 and 12 whose lengths are equal to the length of the casing. The function of these channel-like elements will be described further on.
  • the section 5, the band 8 and the strips 9-12 form an integral unit produced by the extrusion of transparent, plastic material, such as acryl or plexiglass, to form a profiled strand of considerable length, which is then cut into the lengths required.
  • the profiled strand is flexible and can therefore be coiled onto a drum of large diameter, as the strand is discharged from the extrusion machine. The profiled strand can then be unwound from the drum and cut to desired lengths on the site at which the collectors are manufactured and/or constructed installed.
  • the profiled strand Prior to the constructions or installation of a plurali ⁇ ty of solar energy collectors, the profiled strand is cut into sections 5 of equal lengths, whereafter end covers 6 and 7 are attached to the ends of respective sections, so as to form an airtight casing 1 with the ends of the hollow band 8 closed.
  • the casings 1 are then placed adjacent one another on a supporting sur ⁇ face, for instance directly on the ground or on a roof structure (said sections then replacing the outer roof covering) and are mutually connected by means of the channel-like strips or elements 10, 11 and 12, in the manner illustrated in Figure 2, whereafter the collec ⁇ tors are mutually joined v together and/or to the support ⁇ ing surface in some appropriate manner, not shown.
  • the channel-like elements 12 also form elements for draining of rain water.
  • each casing 1 preferably in the form of pipe connectors on the one end cover 6 , as shown in Figure 1 are then connected to pipes 13, 14 and 15 respectively.
  • the pipe 13 is connected to the pump 4, which is started-up when necessary.
  • the pump 4 is necessary because the plastic from which the casing 1 is made is not impervious to diffusion and therewith allows air to enter. Any air present in the casing will act as an insulator and therewith impair efficiency.
  • the pipes 14 and 15 are connected to the device 3, which may comprise a heat exchanger or some other heat utiliz ⁇ ing device.
  • the connections coupled to the pipe 13 communicate with the inner volume of the casing 1, whereas the connections coupled to the pipes 14 and 15 communicate with the channel 2 provided in the band 8 and consisting of an inlet channel 2a and an outlet channel 2b, said channels communicating with one another in the vicinity of the end cover 7.
  • the embodiment of the inventive solar energy collector illustrated in Figures 3-6 comprises casings which consist of a plurality of mutually connected, shorter tubes 16 which together form long tubes.
  • the collector is comprised of four rows of mutually parallel casings, although this number may be fewer or greater than four. Each row may be about 100 metres in length, and even longer, and is comprised of shorter tubes having lengths of between about 2 and 10 metres.
  • the casings of each row rest on a frame, or stand, which is comprised of a plurality of mutually parallel bars 17 which rest hori ⁇ zontally on the ground and which are connected to posts 18 which, in turn, are connected to horizontal bars 19.
  • the mutual spacing of the posts 18 corresponds to the distance between the rows of casings, and the bars 19 are located immediately beneath joins 20 between the mutually connected shorter tubes 16.
  • the frame or stand structure 17-19 has a uniform height and may be made of concrete, wood or steel and is intended to be placed on flat ground, i.e. ground which does not slope.
  • the left-hand row in the Figure 3 and 4 illustration is intended to be positioned so that its left side will face south when the solar energy collectors are install ⁇ ed in the northern hemisphere.
  • Each tube 16 is made of transparent glass or plastic and has a circular or oval cross-sectional shape.
  • the ratio of the major and minor axes of the oval cross-section may be roughly 2:1, wherein the major axis may be about 190 mm and the minor axis about 90 mm.
  • the oval cross- section has been found to be most advantageous, because of low material consumption, small reflection losses and good mechanical strength against externally applied pressure forces.
  • the advantage of using plastic material is that very long lengths of casings can be manufactured in one piece, for instance by extrusion, and because plastic is less fragile than glass and also because the plastic casing (strand) can be wound onto reels and transported in this state.
  • the advantage with glass casings resides in their high mechanical strength to atmospheric pres ⁇ sure, their resistance to aging (discolouration) and their low raw material price.
  • the casings are attached to the bars 19 in the regions of the joints 20 in an appropriate manner (not shown) , such that the major axes of the tube cross-section will form angles of about 80° to the bar 19 and to the ground surface.
  • An absorber 21 is inserted into each casing.
  • the absorber 21 is comprised of a rail or a band made of metal, such as steel, and having two channels 21a which accommodate absorber liquid.
  • the channels 21a are mutually connected at the upper end of the casing in Figure 3.
  • the absorber 21 is positioned along the major axes of the cross-sections of respective tubes and has a width which is slightly smaller than the width of said axes.
  • the absorber 21 preferably extends along the whole length of the casing and is only connected to the casing at the lower end thereof, as shown in Figure 3, thereby enabling the absorber to expand in both its longitudinal direction and in a direction perpendicular thereto.
  • the absorber 21 is held in place inside the casing solely by loose abutment with the joins 20 on the inner surface of the casing, roughly at the ends of the major axis.
  • each tube 16 Mounted at the end of each tube 16 is a rectangular metal plate 22 which is provided with an oval hole 22a and which is attached with the aid of a suitable glue 23.
  • the cross-sectional area of the hole 22a is much smaller than the internal cross-sectional area of the tubes 16.
  • the plates 22 on two tubes 16 lie against one another through the intermediary of an 0- ring 24 and are mutually connected by means of four nuts and bolts 25.
  • both ends of each casing are sealed in an airtight fashion by means of a respective end cap 26 and 27.
  • the end cap 27 is provided with holes through which lines 28 connected to the channels 21a extend.
  • the channels 21a and the lines 28 form a closed system together with a heat exchanger 29, a circulation pump 30 and an absorber liquid container 31.
  • the end cap 27 is also provided with holes for lines 32 which communicate with the interior of the casings and which are connected to a suction pump 33. This is because the casings are not completely airtight, espec ⁇ ially at the joins 20, and it is therefore desirable to maintain the casings under a pressure of about 1 milli- bar in order to create a so-called low vacuum therein.
  • the solar energy collector is provided with reflectors 34 which are constructed to ensure that the maximum amount of light will be deliv- ered to the absorbers 21.
  • the reflectors 34 are suit ⁇ ably comprised of a plurality of steel plates of gener ⁇ ally triangular cross-section, with one side of the triangle straight and in abutment with and attached to the bars 19, and the two remaining sides of the triangle curved and dimensioned so that both diffuse and direct light will be reflected at a maximum onto the absorbers 21 and such that direct light will not be broken by adjacent reflectors, thereby enabling solar rays to be utilized effectively throughout the whole of the south- ern hemisphere.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Photovoltaic Devices (AREA)

Abstract

A solar energy collector comprising a transparent casing (1) and an absorber (8) mounted therein. The casing is comprised of a single long tube or a plurality of shorter tubes which are mutually joined at their ends to form a long tube. The absorber (8) extends through the long tube along the full length of the casing, preferably continuously.

Description

SOLAR COLLECTOR AND METHOD FOR MANUFACTORING THE SAME
DESCRIPTION
Technical Field
The present invention relates to a solar energy collec¬ tor and to a method for its manufacture, as defined in the preambles of respective independent Claims.
Background Art
Convention solar energy collectors are manufactured from a relatively large number of components made from expen¬ sive material, which renders the collectors both expen¬ sive and time-consuming to assemble. When several collectors are installed on one and the same site, complicated frame structures and other devices for supporting and mutually connecting the collectors are also required.
Disclosure of the Invention
An object of the present invention is to enable known solar energy collectors to be manufactured, mounted and installed in a simpler and less expensive manner than was possible hitherto. This object is fulfilled with an inventive solar energy collector and an inventive method having the characteristic features set forth in the characterizing clauses of respective independent Claims.
Brief Description of the Drawings
Figure 1 illustrates schematically and in perspective a plurality of solar energy collectors connected together in accordance with a first embodiment of the invention;
Figure 2 is a cross-sectional view of two mutually connected collectors shown in Figure 1;
Figure 3 is a schematic top view of a plurality of collectors according to another embodiment of the inven¬ tion;
Figure 4 is a schematic sectional view taken on the line IV-IV in Figure 3;
Figure 5 is an enlarged view, partly in section, of elements included in the collector arrangement of Figure 3 and Figure 4; and
Figure 6 is a sectional view taken on the line VI-VI in Figure 5.
Description of Preferred Embodiments
Each solar energy collector of the mutually coupled collectors illustrated in Figures 1 and 2 is comprised of a casing 1, an absorber channel 2 and connections leading to a device 3 for recovery of the heat generated in the collector and to a vacuum pump 4 for evacuating air from the collector. The casing 1 is comprised partly of a hollow, elongated section 5 in the form of a tube of circular or generally circular cross-section, so as to give the casing the maximum radial strength and to ensure that it will not collapse as a result of the subpressure prevailing therein, and partly of two end closure devices in the form of circular caps 6 and 7 which are either glued or welded to the ends of the sections and which are preferably made of plastic material. A hollow strip 8 which incorporates the channel 2, which consists of two part channels 2a, 2b and contains pig- mented absorber fluid (e.g. black fluid) is enclosed in the casing 1 and has the same axial extension as the casing and a radial extension which is almost equal to the radial extension of the casing. The band 8 is connected to the casing 1 by means of a strip 9, which also has the same axial extension as the casing. The bar 8 is mounted generally centrally in the casing 1 and is connected thereto solely by the strip 9, so as to maximize heat absorption and minimize heat losses.
Fitted to the outside of the casing 1 are elongated channel-like elements 10, 11 and 12 whose lengths are equal to the length of the casing. The function of these channel-like elements will be described further on.
The section 5, the band 8 and the strips 9-12 form an integral unit produced by the extrusion of transparent, plastic material, such as acryl or plexiglass, to form a profiled strand of considerable length, which is then cut into the lengths required. The profiled strand is flexible and can therefore be coiled onto a drum of large diameter, as the strand is discharged from the extrusion machine. The profiled strand can then be unwound from the drum and cut to desired lengths on the site at which the collectors are manufactured and/or constructed installed.
Prior to the constructions or installation of a plurali¬ ty of solar energy collectors, the profiled strand is cut into sections 5 of equal lengths, whereafter end covers 6 and 7 are attached to the ends of respective sections, so as to form an airtight casing 1 with the ends of the hollow band 8 closed. The casings 1 are then placed adjacent one another on a supporting sur¬ face, for instance directly on the ground or on a roof structure (said sections then replacing the outer roof covering) and are mutually connected by means of the channel-like strips or elements 10, 11 and 12, in the manner illustrated in Figure 2, whereafter the collec¬ tors are mutually joinedv together and/or to the support¬ ing surface in some appropriate manner, not shown. The channel-like elements 12 also form elements for draining of rain water.
The connectors provided on each casing 1, preferably in the form of pipe connectors on the one end cover 6 , as shown in Figure 1, are then connected to pipes 13, 14 and 15 respectively. The pipe 13 is connected to the pump 4, which is started-up when necessary. The pump 4 is necessary because the plastic from which the casing 1 is made is not impervious to diffusion and therewith allows air to enter. Any air present in the casing will act as an insulator and therewith impair efficiency.
The pipes 14 and 15 are connected to the device 3, which may comprise a heat exchanger or some other heat utiliz¬ ing device. The connections coupled to the pipe 13 communicate with the inner volume of the casing 1, whereas the connections coupled to the pipes 14 and 15 communicate with the channel 2 provided in the band 8 and consisting of an inlet channel 2a and an outlet channel 2b, said channels communicating with one another in the vicinity of the end cover 7.
The embodiment of the inventive solar energy collector illustrated in Figures 3-6 comprises casings which consist of a plurality of mutually connected, shorter tubes 16 which together form long tubes. In the embodi- ment illustrated in Figures 3 and 4, the collector is comprised of four rows of mutually parallel casings, although this number may be fewer or greater than four. Each row may be about 100 metres in length, and even longer, and is comprised of shorter tubes having lengths of between about 2 and 10 metres. The casings of each row rest on a frame, or stand, which is comprised of a plurality of mutually parallel bars 17 which rest hori¬ zontally on the ground and which are connected to posts 18 which, in turn, are connected to horizontal bars 19. The mutual spacing of the posts 18 corresponds to the distance between the rows of casings, and the bars 19 are located immediately beneath joins 20 between the mutually connected shorter tubes 16. The frame or stand structure 17-19 has a uniform height and may be made of concrete, wood or steel and is intended to be placed on flat ground, i.e. ground which does not slope. The left-hand row in the Figure 3 and 4 illustration is intended to be positioned so that its left side will face south when the solar energy collectors are install¬ ed in the northern hemisphere.
Each tube 16 is made of transparent glass or plastic and has a circular or oval cross-sectional shape. The ratio of the major and minor axes of the oval cross-section may be roughly 2:1, wherein the major axis may be about 190 mm and the minor axis about 90 mm. The oval cross- section has been found to be most advantageous, because of low material consumption, small reflection losses and good mechanical strength against externally applied pressure forces.
The advantage of using plastic material is that very long lengths of casings can be manufactured in one piece, for instance by extrusion, and because plastic is less fragile than glass and also because the plastic casing (strand) can be wound onto reels and transported in this state. The advantage with glass casings resides in their high mechanical strength to atmospheric pres¬ sure, their resistance to aging (discolouration) and their low raw material price.
The casings are attached to the bars 19 in the regions of the joints 20 in an appropriate manner (not shown) , such that the major axes of the tube cross-section will form angles of about 80° to the bar 19 and to the ground surface. An absorber 21 is inserted into each casing. The absorber 21 is comprised of a rail or a band made of metal, such as steel, and having two channels 21a which accommodate absorber liquid. The channels 21a are mutually connected at the upper end of the casing in Figure 3. The absorber 21 is positioned along the major axes of the cross-sections of respective tubes and has a width which is slightly smaller than the width of said axes. The absorber 21 preferably extends along the whole length of the casing and is only connected to the casing at the lower end thereof, as shown in Figure 3, thereby enabling the absorber to expand in both its longitudinal direction and in a direction perpendicular thereto. The absorber 21 is held in place inside the casing solely by loose abutment with the joins 20 on the inner surface of the casing, roughly at the ends of the major axis.
The construction of the airtight joins 20 is shown in Figures 5 and 6. Mounted at the end of each tube 16 is a rectangular metal plate 22 which is provided with an oval hole 22a and which is attached with the aid of a suitable glue 23. The cross-sectional area of the hole 22a is much smaller than the internal cross-sectional area of the tubes 16. The plates 22 on two tubes 16 lie against one another through the intermediary of an 0- ring 24 and are mutually connected by means of four nuts and bolts 25. As shown in Figure 3, both ends of each casing are sealed in an airtight fashion by means of a respective end cap 26 and 27. The end cap 27 is provided with holes through which lines 28 connected to the channels 21a extend. The channels 21a and the lines 28 form a closed system together with a heat exchanger 29, a circulation pump 30 and an absorber liquid container 31. The end cap 27 is also provided with holes for lines 32 which communicate with the interior of the casings and which are connected to a suction pump 33. This is because the casings are not completely airtight, espec¬ ially at the joins 20, and it is therefore desirable to maintain the casings under a pressure of about 1 milli- bar in order to create a so-called low vacuum therein.
As shown in Figures 3 and 4, the solar energy collector is provided with reflectors 34 which are constructed to ensure that the maximum amount of light will be deliv- ered to the absorbers 21. The reflectors 34 are suit¬ ably comprised of a plurality of steel plates of gener¬ ally triangular cross-section, with one side of the triangle straight and in abutment with and attached to the bars 19, and the two remaining sides of the triangle curved and dimensioned so that both diffuse and direct light will be reflected at a maximum onto the absorbers 21 and such that direct light will not be broken by adjacent reflectors, thereby enabling solar rays to be utilized effectively throughout the whole of the south- ern hemisphere.
Although the invention has been described solely with reference to two exemplifying embodiments thereof, it will be understood that the invention is not restricted to these embodiments and that the invention is restrict¬ ed solely by the scope of the following Claims.

Claims

1. A solar energy collector comprising a transparent casing and an absorber mounted therein, c h a r a c ¬ t e r i z e d in that the casing (l; 16) is comprised of a plurality of tubes which are mutually connected at their respective ends in a manner to form a long, gener¬ ally straight tube; and in that the absorber (8; 21) extends through the long tube, preferably continuously along the full length of the casing.
2. A collector according to Claim 1, c h a r a c ¬ t e r i z e d in that the absorber (8) includes at least one channel (2a, b) formed integrally with the casing (1) .
3. A collector according to Claim 1, or 2, c h a r ¬ a c t e r i z e d in that the tube is an extruded section (5) having preferably a circular or oval cross- sectional shape and cut into desired lengths.
4. A collector according to Claim 2 or 3, c h a r ¬ a c t e r i z e d in that the channel (2a, b) has the form of a hollow band (8) connected to the casing (1); and in that the width of the band is negligibly smaller than the internal cross-sectional dimension of the casing.
5. A collector according to any one of the preceding
Claims, c h a r a c t e r i z e d by profiled elements (10-12) which are formed integrally with the casing (1) and which project out from mutually opposite sides thereof, said profiled elements functioning to connect together a plurality of casings in side-by-side rela¬ tionship.
6. A collector according to any one of the preceding Claims, c h a r a c t e r i z e d in that the casing (16) with absorber (21) is mounted generally horizont¬ ally and rests on a plurality of supports (19) placed beneath the joins (20) located between mutually connect¬ ed shorter tubes.
7. A collector according to any one of the preceding Claims, c h a r a c t e r i z e d in that the tubes form a closed space which is connected to a suction pump (4; 33).
8. A collector according to any one of the preceding Claims, c h a r a c t e r i z e d in that the tube (16) has a generally oval cross-sectional shape; and in that the absorber (21) is generally flat with the ab¬ sorber surfaces located along the major access of the oval.
9. A collector according to Claim 8, c h a r a c ¬ t e r i z e d in that the major axis of the oval is inclined relative to the horizontal; and in that the extension of the absorber (21) in the direction of the major axis is preferably only negligibly smaller than the length of said major axis.
10. A collector according to Claim 1, c h a r a c ¬ t e r i z e d in that the tube is made of plastic or glass.
11. A collector according to any one of the preceding Claims, c h a r a c t e r i z e d in that the casings (1; 16) are positioned in mutually parallel and mutually spaced relationship; and in that reflectors (34) having preferably curved surfaces are mounted between two mutually adjacent casings.
12. A method for manufacturing a solar energy collector comprising a casing (l) which is at least partially pervious to solar radiation, comprising extruding a hollow, elongated profiled strand from plastic material, cutting the strand into sections (5) of predetermined length, and providing each profile with connectors (6, 7) at both ends thereof to form the casing (1), c h a r a c t e r i z e d by extruding within the profile (5) a channel (2a, b) for accommodating absorber liquid and occupying only a part of the casing at the same time as the profiled strand is extruded.
13. A method according to Claim 12, c h a r a c ¬ t e r i z e d by extruding the channel (2a, b) as an integral part of the section (5) in the form of a hollow band (8) .
PCT/SE1991/000081 1989-08-08 1991-02-05 Solar collector and method for manufacturing the same WO1992014103A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE8902695A SE467548B (en) 1989-08-08 1989-08-08 SOLAR COLLECTOR AND PROCEDURES FOR ITS MANUFACTURING
PCT/SE1991/000081 WO1992014103A1 (en) 1989-08-08 1991-02-05 Solar collector and method for manufacturing the same
DE4193450T DE4193450T1 (en) 1989-08-08 1991-02-05 Solar energy collector with process for its manufacture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8902695A SE467548B (en) 1989-08-08 1989-08-08 SOLAR COLLECTOR AND PROCEDURES FOR ITS MANUFACTURING
PCT/SE1991/000081 WO1992014103A1 (en) 1989-08-08 1991-02-05 Solar collector and method for manufacturing the same

Publications (1)

Publication Number Publication Date
WO1992014103A1 true WO1992014103A1 (en) 1992-08-20

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Country Status (3)

Country Link
DE (1) DE4193450T1 (en)
SE (1) SE467548B (en)
WO (1) WO1992014103A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003023292A1 (en) * 2001-09-11 2003-03-20 Manu Ghela Solar collector pipe
US6604521B2 (en) * 2001-09-11 2003-08-12 Travis Smith Solar collector pipe
FR2875292A1 (en) * 2004-09-14 2006-03-17 Herve Pierre Marie Majastre Solar collector for building, has absorber made or thermoplastic or rubber and integrated with thermoplastic pipe by insulating material layer, and metallic sheet and adhesive layer plated on outer wall of building surface by gluing/flange
CN101762102A (en) * 2008-12-08 2010-06-30 北京环能海臣科技有限公司 Pressing installed heat-preservation tailstock assembly of solar vacuum heat collecting tube
EP2256428A1 (en) * 2009-05-26 2010-12-01 Aries Ingenieria y Sistemas, S.A. Irradiated energy collector device
ITGE20120077A1 (en) * 2012-07-31 2014-02-01 Daniele Parodi SOLAR THERMAL COLLECTOR WITH VACUUM PIPES
WO2014090330A1 (en) * 2012-12-14 2014-06-19 Heliocaminus Ab A solar thermal vacuum tube collector
WO2017025699A1 (en) * 2015-08-13 2017-02-16 Gas Expansion Motors Limited Solar energy collector

Citations (12)

* Cited by examiner, † Cited by third party
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WO2003023292A1 (en) * 2001-09-11 2003-03-20 Manu Ghela Solar collector pipe
US6604521B2 (en) * 2001-09-11 2003-08-12 Travis Smith Solar collector pipe
CN100430670C (en) * 2001-09-11 2008-11-05 马纳·格拉 Solar collector pipe
FR2875292A1 (en) * 2004-09-14 2006-03-17 Herve Pierre Marie Majastre Solar collector for building, has absorber made or thermoplastic or rubber and integrated with thermoplastic pipe by insulating material layer, and metallic sheet and adhesive layer plated on outer wall of building surface by gluing/flange
CN101762102A (en) * 2008-12-08 2010-06-30 北京环能海臣科技有限公司 Pressing installed heat-preservation tailstock assembly of solar vacuum heat collecting tube
EP2256428A1 (en) * 2009-05-26 2010-12-01 Aries Ingenieria y Sistemas, S.A. Irradiated energy collector device
ITGE20120077A1 (en) * 2012-07-31 2014-02-01 Daniele Parodi SOLAR THERMAL COLLECTOR WITH VACUUM PIPES
WO2014090330A1 (en) * 2012-12-14 2014-06-19 Heliocaminus Ab A solar thermal vacuum tube collector
WO2017025699A1 (en) * 2015-08-13 2017-02-16 Gas Expansion Motors Limited Solar energy collector

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DE4193450T1 (en) 1997-07-24
SE8902695D0 (en) 1989-08-08
SE467548B (en) 1992-08-03
SE8902695L (en) 1991-02-09

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