EP3123080A2

EP3123080A2 - Absorber system

Info

Publication number: EP3123080A2
Application number: EP15726511.7A
Authority: EP
Inventors: Max Mertins; Nicolaus LEMMERTZ; Naumann MORITZ
Original assignee: Frenell GmbH
Current assignee: Frenell GmbH
Priority date: 2014-03-24
Filing date: 2015-03-24
Publication date: 2017-02-01
Also published as: US11835264B2; CN106164600A; US11835263B2; CL2019000961A1; US20210055019A1; US11828494B2; US20170097173A1; US10941963B2; CL2016002392A1; US11906204B2; CL2019000960A1; CN106164600B; WO2015144138A3; WO2015144138A2; US20230266042A1; DE112015001430A5; US20230221041A1; US20230228459A1; WO2015144138A4

Abstract

Known absorber systems for use in solar fields having a whole series of disadvantages. Admittedly, hanging the absorber along a rail assembly and thus allowing a largely unhindered longitudinal expansion as a result of thermal deformation are known. However, the suspension is exposed to the weather, displacements in relation to the secondary reflector result, and the known assembly can be measured only by means of external measuring tools. The absorber system according to the invention solves these problems in that the absorber tube is suspended on a rail below an absorber cover. The design according to the invention also makes it possible to move measuring and cleaning robots and the like along the absorber tube more and allows the absorber tube and the secondary reflector to be jointly suspended, whereby an exact mutual alignment between the two components is enabled.

Description

A B S O R B E R S Y S T E M

The present invention relates to an absorber system comprising an absorber bearing, a Absorbertragvorrichtung and an absorber cover, and an absorber tube, which is suspended on a support carriage on a supported by the Absorbertragvorrichtung rail element.

Such an absorber system is already known from the German patent DE 10 201 1 088 829 B3. There it is suggested that an absorber tube using a

Carriage assembly is hung on a rail. This is in the specific embodiment of a double-T-rail, on which engage on both sides roller elements that carry a movable along the rail slide. Suspended on this slide is the absorber tube, which is positioned in such a way elevated over the circumferentially distributed primary reflectors, that this is the incident

Redirect sunlight onto the absorber tube and heat it up as part of a line-focusing process.

Specifically, the given solution initially provides a support structure which simplifies from a vertical support and a top support that completes this

Cross strut is formed. In this T-shaped arrangement, which may well be formed in a concrete embodiment, for example, Y-shaped, mounting frames are mounted, which are formed substantially rectangular. Integral with these support frame spring tabs are formed, which connect the tensioned between the individual support posts elements with the support posts. Based on these

Spring tabs, which form solid joints with respect to the support posts, can be compensated for changes in length due to temperature differences, so that with the changes in length associated movements of the material does not cause damage. Thus, initially mentioned as an element between the individual support posts, the above-mentioned rail element on which the absorber tube is suspended by means of longitudinally displaceable on the rail member supporting carriage. This allows the absorber tube, which is subjected to extreme temperature fluctuations, to be supported in its suspension on the rail element in a largely movable manner

Avoid compression or overstretching. Regardless of this, DE 10 201 1 008 829 B3 provides an absorber cover in which a secondary reflector is suspended, so that the latter in turn is at least able to be moved in a limited manner via the aforementioned solid-body joints, both with respect to the absorber tube and with respect to the support posts. The absorber cover as such is in this case formed box-shaped and in turn firmly connected to the support posts. It consists of several individual parts, which each form sections of the housing and are placed in up to three parts around the absorber tube and the secondary reflector around.

However, from various aspects, the previously known solution appears to be complicated and thus expensive and to bring some disadvantages. Thus, it should first be noted that the absorber cover as a welded construction is expensive to produce, after the right-angled canted hood parts are to be connected independently with the support posts. Furthermore, the individual hood parts must be assembled so that at the same time a movement of the support carriage of the absorber tube through the hood parts is possible therethrough, after the rail suspension is arranged above the housing formed by the absorber cover. This, in turn, puts the support carriage of the absorber tube under the weather, so that greater wear is to be expected. The storage of the secondary reflector requires separate measures in the absorber cover and the support frame of the support posts. The absorber tube receiving clamp surrounds this directly, so that a heat transfer from the absorber tube to the clamp takes place and thus the clamp is in turn strongly heated. This significantly increases on the one hand the material requirements of the absorber tube holding clamp and the directly associated with this clamp support carriage. On the other hand, it leads to larger heat radiation, as the radiating surface is thereby significantly increased. This greater radiation is to be used as loss of heat efficiency-reducing. Finally, it seems costly, a survey of the present known structure using measuring instruments make, because this would require a separate rail assembly should be used to realize a continuous measurement of solar radiation on the absorber tube.

Based on this problem and in connection with the state of

Technique known problems, the invention has set itself the task of proposing an absorber system, which solves the numerous problems of the prior art and both the production and the operation of an absorber and necessary for this required further installations simplifies and makes more efficient ter.

This object is achieved by various aspects of the invention, in particular an absorber bearing according to the features of claim 1, an absorber bearing according to the features of claim 1 1, an absorber cover according to the features of claim 14, a Absorbertragvorrichtung according to the features of claim 20, an absorber system According to the features of claim 23 and a method for the construction of an absorber cover according to the features of claim 24. Meaningful embodiments of the method and of the device parts and of the overall system can be taken from the respective subclaims.

According to the invention, an absorber system consists essentially of the three components of a Absorbertragvorrichtung, an absorber cover supported thereon and an absorber bearing, on which the absorber tube is mounted hanging. The absorber bearing here according to the invention also comprises a support carriage, which is movable on a rail element. However, the invention provides in contrast to the prior art in this case that the support carriage is associated with a clamp for encompassing the absorber tube, which holds the absorber tube with the interposition of a plurality of distributed over the inner circumference of the clamp, thermally and optionally also electrically insulating support elements.

It is thus carried out a more or less point-like contacting of the very hot in operation absorber tube, which also goes by means of thermally insulating support elements vonstatten. Due to the fact that isolation of the Absorber tube is made directly at the first contact, the heat loss due to heat radiation, heat conduction and convection due to the heating of unnecessary other components is minimized. The heat loss is largely limited to the absorber tube itself.

Due to the fact that the support elements do not or hardly pass on the heat of the absorber tube, the clamp and thus also the remainder of the support slide remains insignificant above ambient temperature, so that in addition the material stress of these elements can be kept as low as possible.

In fact, the use of such support elements involves the problem that they must be made of a material which brings with it a suitable thermal and possibly electrical insulation. In particular, a ceramic material is suitable for this, which in turn brings with it the problem that it is shock-sensitive. Thus, according to the invention, if the support elements are made of ceramic, then the support elements may be permanently damaged due to impacts on the absorber tube, which may occur due to thermal changes in length of the tube. Therefore, it is provided in particular that measures are taken to cushion such shocks against the support elements. One possibility for cushioning is that the support elements are each received by means of recordings for attachment to the clamp, wherein these receptacles are each arranged on a spring bar. The spring webs can be worked out of the full material of the clamp by below the receptacle, a circumferentially facing material slot is introduced, in which the material of the spring bar can escape in a shock. Thus, although the support element itself is not elastic, but its inclusion on the clamp in the end be able to absorb shock in the pipe.

An alternative to this is that a ductile inlay is arranged between the absorber tube and the support element or alternatively also between the support element and the clamp, ie an intermediate layer which consists of spring-capable material. Such a ductile inlay can be made of copper or aluminum, for example. Due to the required size substantially corresponding to the contact surface of the support element with the absorber tube or with the inclusion of the Clamp, causes such a ductile inlay practically no additional radiation losses.

In an advantageous embodiment, the support elements may be profiled in the longitudinal direction of the absorber tube, in particular at least one in the radial direction of the absorber tube

Have absorber tube extending groove. As a result, support ribs are formed on both sides of the groove, with the free ends of these support ribs coming into direct contact with the absorber tube. In particular, the groove can be prepared for receiving a weld seam of the absorber tube, whereby an additional fixation between clamp and absorber tube occurs.

The clamp in turn is, as already mentioned, suspended from a support carriage which has one or more rollers. These rollers are prepared for mounting on a rail element along which the support carriage can be moved by means of the rollers. The rollers are in turn attached to spring webs of the support carriage, which essentially consists of a support body, in turn, material slots are introduced above and / or below the attachment of the individual rollers. So it is also possible here that in the event of a collision of the absorber tube or a shock on the rail element this shock can be absorbed by a movement of the spring bar in the direction of the material slot.

As far as the spring bar is arranged centrally in the support body of the support carriage, it makes sense to provide a material slot on both sides of the suspension of the roller element.

First of all, therefore, the clamp which carries the absorber tube is suspended on a support carriage and will depend in this respect due to gravity down. For further precise alignment of the clamp can be additionally assigned cantilever arms on both sides, which allow a support on the absorber tube cross absorber cover. To this end, the cantilever arms can be assigned roller elements which make it possible to roll on the inside of an absorber cover, so that mobility of the carriage is also ensured here. Because of this three-point support on the rail element as well as at two points of the absorber cover, the absorber tube gets into a precise Defined position, only in the longitudinal direction of Absorberrohs is still given a mobility, which must be ensured due to the temperature expansion of the tube. This allows a very precise directing of the solar radiation by aligning the primary mirror directly on the absorber tube.

As is known, a secondary reflector in the immediate vicinity is assigned to the absorber tube in order to cast the solar radiation reflected by the primary mirrors on the absorber tube back again onto the absorber tube from the other side and thus increase the efficiency. Again, it is necessary to provide a very precise alignment between the secondary reflector and the absorber tube. Due to the much smaller distances between the secondary reflector and the absorber tube, it is even more important here to realize an exact alignment. It therefore seems in contrast to the prior art makes sense to hang the secondary reflector just not independent of the absorber tube, but to realize the suspension together with the absorber tube. Therefore, the cantilever arms can be additionally assigned spring elements, which is assigned to the cantilever arms of the secondary reflector. This engages as hood construction, the absorber tube and the surrounding clamp and is placed here on the cantilever arms of the clamp. Due to the resilient attachment and shocks are collected against the secondary reflector, so that damage can be avoided as much as possible here. Due to the common, longitudinally movable suspension of absorber tube and secondary reflector, the two elements exactly maintain their mutual position, which leads to a more precise alignment of the incident energy radiation on the absorber tube.

In addition to the secondary reflector this in turn can be surrounded by a protective hood, which is thus arranged between the secondary reflector and an outer absorber cover. Such a protective cover can in particular be made of sheet steel, in particular of sheet steel, so that the protective cover in turn can afford a certain amount of reflection. In the event of damage to the glass reflector, this protective cover made of sheet steel protects the material of the absorber cover from being strongly heated and possibly damaged as a result of the radiation incident from the primary mirrors. A connection between the protective hood and the secondary reflector can be produced for example by gluing.

According to the invention, an absorber system also has an absorber cover which protects the absorber tube and the secondary reflector surrounding it from damage and contamination to the outside. In contrast to the prior art, however, the invention provides that the absorber cover covers not only the absorber tube and the secondary reflector, but also the complete suspension, so that the ingress of impurities, for example by weather, is largely avoided. This is particularly important for the optical surfaces of the absorber tube and the secondary mirror to minimize cleaning cycles. Also, the material stress in terms of thus missing weather conditions increases the durability and efficiency of the arrangement. For this purpose, the rail element may, for example, be a C-rail which is open at the bottom, once again the intrusion of external influences is made more difficult. The support carriage is provided in this case substantially as a construction with a flat support body, which has rollers on both sides, which are then threaded into the C-rail. But there are also many other rail types, such as the double-T rail used.

The absorber cover consists of an absorber hood, which is held in shape by means of distributed over its longitudinal extent, peat-shaped holding frame. The holder frames extend over the absorber hood in such a way that the absorber hood is practically suspended from the inner contour of the holding frame. In particular, it is provided that the holding frame have a round or polygonal inner contour, so that in reverse the outer contour of the absorber hood is arcuate or polygonal. In particular, it speaks in favor of a polygonal design that this brings a high degree of rigidity and allows exact production.

In a further development of the absorber cover, it is provided that a holding bracket is assigned to the holding frame in the region of the inner contour, which is preferably located in the area of the inner contour. rich of the apex of the inner contour protrudes into the area spanned by the holding frame area. The headband is open at the bottom and suitable for receiving the rail, in the example a C-rail or double-T rail. This means that the retaining bracket at least substantially simulates the outer contour of the rail, so that the rail can be pushed through the headband, but there has degrees of freedom only in its longitudinal direction. Falling down is thereby avoided despite the downwardly open design of the retaining clip. The opening width of the retaining clip essentially corresponds to the opening width of the rail, so that the support carriage can be moved in the rail and due to the opening of the retaining bracket, it can also pass unhindered through it.

The absorber hood, which can be manufactured as a one-piece element and brought into the desired outer contour, for example, by bending, has receptacles in the region of its vertex, which allows the retaining clip to be passed through the material of the absorber hood. This brings on the one hand the absorber cover in exact contact with the holding frame, on the other hand, this forms the enclosed by the brackets inner contour on the inside of the absorber hood. After such a mating of the absorber hood with the support frame, the rail below the absorber hood can then be pushed through by the projecting into the interior of the absorber hood headband, so that in this way a first fixation between the absorber hood and holding frame is created by means of the rail. To complete the absorber cover on the one hand, the rail can be pressed by means of clamping elements against the headband by a clamping element is used, which spreads, for example by means of a clamping screw between the absorber hood and rail. These can be connected to the absorber hood at the free ends of the holding frames, for example by means of end-side screwing.

This overall construction comprising absorber cover and absorber bearing and absorber tube suspended therefrom is now arranged on an absorber support device, which are picked up on its side facing the absorber cover and between each two fork struts a guideway for a movement in the longitudinal extension direction beneath the absorber cover. keep the carriage free. Due to the fact that, by design, the absorber cover does not require a transverse strut between a fork-lift of the support support or the free ends of the support frame, a sufficient space is spanned in which a carriage can be moved below the absorber tube in its longitudinal direction. This can be aligned uninterruptedly on the absorber tube, as an interruption, for example, by transverse struts of the support posts, as shown in the prior art, not done. The fork struts or the absorber cover can be assigned here on both sides driving surfaces on soft a carriage in the longitudinal direction of the absorber tube can be performed. For example, such running surfaces may be in direct proximity to the lower edge of the absorber cover, so that a carriage can be placed on both running surfaces and it is also impossible due to the lateral boundaries that such a carriage derailed.

With some advantage, the individual support posts are formed in this construction of several Y-shaped layers, which are indeed arranged together on the support post but held against each other movable. The mobility is in turn realized by a solid-state joint by the fork struts of the Y-arrangement are each formed resiliently. This in turn allows for a collection of different temperature expansions of the materials, which of the

Support posts are supported and avoids upsets and strains in the material.

The invention described above will be explained in more detail below with reference to an embodiment.

Show it

an absorber cover in an exploded perspective view obliquely from above, FIG. 2 shows an absorber cover in an end-face front view in the direction of the longitudinal extent of the absorber cover,

FIG. 3 shows a detail of the vertex of the absorber cover according to FIG. 2 in an end view,

FIG. 4 shows a detail of the free edges of the absorber cover according to FIG. 2 in an end-face plan view,

FIG. 5 shows the absorber cover according to FIG. 2 in connection with a supporting support in an end-face plan view,

FIG. 6 shows a support carriage in a lateral plan view,

2 shows the absorber cover according to FIG. 2 with inserted carrier carriage and clamp fastened thereto with extension arms in a frontal plan view,

Figure 8 shows the absorber cover according to Figure 2 without support carriage, only with inserted secondary reflector and protective cover in a frontal plan view, and

Figure 9 shows a complete absorber system, comprising an absorber cover, an absorber bearing, an absorber tube and a support bracket and a carriage in a frontal plan view.

Figure 1 shows an absorber hood 2, which has been made of a steel sheet by bending in one piece. The absorber hood 2 has a polygonal outer contour 4, as well as two recesses 3 in a vertex area. In the region of its longitudinal edges, the absorber hood 2 also has a folded edge. in the Meaning of an exploded view, a holding frame 5 is shown above the absorber hood 2, which has a polygonal inner contour 7. The polygonal inner contour 7 is in this case shaped such that it corresponds to the polygonal outer contour 4 of the absorber hood 2. Furthermore, the holding frame 5 has in its apex region a holding bracket 6, which is open at the bottom and surrounds a recess. By a lowering of the holding frame 5 such that the parts of the retaining clip 6 pass through the recesses 3, the polygonal outer contour 4 of the absorber hood 2 can be brought into abutment with the polygonal inner contour 7 of the retaining frame 5. In this way, the retaining clip 6 and the shape cutout enclosed by it project into the absorber hood 2, so that subsequently a counter-latching means can be pushed through this shaped cutout. Because of this, a separation of the absorber hood 2 and the holding frame 5 is then made impossible, so that this measure connects the absorber hood 2 and the holding frame 5 firmly together. In addition, the holder frame 5 has at its free ends screw surfaces via which a screw connection with the absorber hood 2 can be made in the region of its fold along its longitudinal edges. This assembly step, which in the simplest case only involves the insertion of a counter-latching means, for example a C-rail for receiving a support carriage, requires an absorber cover 1 according to the invention.

Figure 2 shows the absorber cover 1 in a frontal plan view, now with other added elements. Clearly recognizable is the polygonal inner contour 7 of the holding frame 5, on which now the absorber hood 2 is applied directly. After applying the absorber hood 2 as shown in the picture, a C-rail 8 was inserted into the headband 6 and then clamped with a clamping device 9. At the free ends of the holding frame 5 and the folded edge of the absorber hood 2 at the longitudinal edges of a running surface 1 1 was arranged.

Figure 3 shows as a detail the attachment of the C-rail 8 in the vertex of the holding frame 5. The C-rail 8 in this case has a substantially rectangular cross-section, wherein in the region of the opening of the C-rail 8, a rejuvenation occurs. This ensures on the one hand for an exact positioning of the C-rail 8 in the correspondingly shaped retaining clip 6, on the other hand this ensures a centering After a joining of the absorber cover 2 and the holding frame 5, the C-rail 8 can initially be easily inserted into the headband 6 in the longitudinal direction of the absorber hood 2. Subsequently, a clamping device 9 arranged above the C-rail 8 is removed by screwing in a clamping screw opposite the C-rail.

Rail 8 jammed. This is done by the fixed clamping device 9 is pushed away by the penetration of the clamping screw 10 of the C-rail 8, which leads in response to the fact that the C-rail 8 due to the impossibility of evasion of the clamping device 9 in the contour of the retaining clip. 6 is pressed. In this way, a very simple but effective connection between absorber hood 2, holding frame 5 and C-rail 8.

FIG. 4 shows the free end of the holding frame 5, around which a wringing is guided in the region of the longitudinal edge of the absorber hood 2. Then an additional profile element is placed by screwing, which realizes a driving surface 1 1 on the inside of the absorber hood 2.

Figure 5 shows a combination of the absorber cover 1 shown in Figure 2, which is connected to a support bracket 13. A connection is in this case again by a screw 14 in the region of the respective free ends of the support frame 5 and support bracket 13, so that between the support frame 5 and the support bracket 13, a wide space is spanned. In the lower region of a guideway 16 is kept free for a carriage, which can be placed on the riding surfaces 1 1 and sags in the track 16. Due to the lateral limitations of the running surfaces 1 1 through the absorber hood 2 and the absorber cover

1, lateral displacement of a carriage 35 positioned in the track 16, as shown later, is avoided. The lateral fork struts 15 are configured in the support posts 13 as a solid-state joint, that is made of a thin spring steel, so that they can yield in the longitudinal direction of the absorber tube.

Figure 6 shows the support body 17 of a support carriage 28 which is to be moved in the C-rail 8 of the absorber cover 1. For insertion into the C-rail 8, the support body 17 at both ends in each case an arrow-shaped, terminal one threading aid 21, which facilitates the insertion of the support carriage in the C-rail 8. Rollers 18, which are arranged on both sides at the front and rear on the support body 17, are received directly in the C-rail. These are attached to a respective spring bar 19, which is arranged centrally in the support body 17 in the example shown. As a result, it is necessary to separate these spring webs 19 from the support body 17 on both sides by means of material slots 20, so that in the case of a vertically directed impact, the spring webs 19 can move into the material slots 20 together with the rollers 18. This makes it possible to already absorb some impact force in the spring element thus formed.

FIG. 7 shows the combination of a cover 1 as already described in FIG. 2 and a support carriage 28 supplemented by a clamp 22. The support body 17 is threaded with its rollers 18 in the C-rail 8 and carries the clamp 20, which has a circular shape Clamp gate 23 is formed. By opening the screw connections 24, the clamp 22 can be wrapped around an absorber tube 37, which will be shown later, and this will then contact the support element 25 all around. This results in a determination of the absorber tube 37 by means of the support elements 25, so that an enclosing three-point suspension is created. The support elements 25 are in this case made of ceramic, so that it is necessary to arrange the support elements 25 each on a spring bar 26, which in turn is criticized by a material slot 27 of the actual clamp 22.

The fact that the material slot 27 is only limited in space, the spring bar 26, however, is still connected to the clamp 22. Arranged laterally on the clamp 22 are bilateral extension arms 29, which offer lateral support against the absorber hood 2 by means of the terminal roller elements 30. As a result, a lateral swinging back and forth of the arrangement is prevented. Arranged on the delivery arms 29 are also spring elements 31, on which a placement of a secondary reflector 33 and an associated protective hood 34 can take place.

FIG. 8 shows these additional elements, which are not shown in FIG. 7 for the sake of clarity. By means of a spring support 32, the combination of secondary reflector 33 and protective hood 34 can be placed on the spring elements 31, so that a simultaneous method or expansion of absorber tube 37 and secondary reflector 33 is made possible. This allows a very exact mutual Alignment, so that a high efficiency in the transmission of energy from the secondary reflector 33 to the absorber tube 37 can be achieved. The arrangement of the protective hood 34 connected thereto, for example, by gluing to the secondary reflector 33, protects the absorber cover 1 from damage caused by the concentrated sunlight in the event of damage to the secondary reflector 33.

Figure 9 shows a complete absorber system, comprising a support bracket 13, on which an absorber cover 1 is placed. The absorber cover 1 comprises an absorber hood 2, which is placed over an absorber tube 37 and protects it from the weather. With a received under the absorber hood 2 is a support carriage 28 which holds the absorber tube 37 in position. Due to this construction, a track for a carriage 35 is kept below the absorber tube 37 between lateral fork struts 15 of the support post 13, which can be placed by means of roller elements 36 on a running surface 1 1 in the edge region of the absorber cover 1. Such a carriage 35, for example with a measuring robot for measuring the incident on the absorber tube 37 radiation of the individual primary mirror, is thereby able to perform measurements along the entire absorber tube 37 without being removed in between or be interrupted by transverse struts.

Thus described above is an absorber system comprising an absorber cover, a Absorbertragwerk and an absorber bearing, the latter storing an absorber tube longitudinally movable. On the basis of a novel design of the absorber cover this allows for a weather-protected storage of the support carriage on which the absorber tube is suspended, so a simple and inexpensive construction. On the other hand, due to its thermal and electrical insulation solution, the absorber bearing offers a more efficient suspension of the absorber tube and reduces energy losses due to heat radiation. The construction of the absorber structure also allows an intelligent arrangement of carriages, which can be moved in the area of the absorber tube. REFERENCE LIST

1 absorber cover

2 absorber hood

3 recess

4 polygonal outer contour

5 holding frame

6 headband

7 polygonal inner contour

8 C rail

9 clamping device

10 clamping screw

11 driving surface

12 screw connection

13 support post

14 screw connection

15 fork stay

16 driveway

17 supporting body

18 roll

19 spring bar

20 material slot

21 threading aid

22 clamp

23 clamp gates

24 screw connection

25 tooth element

26 spring bar

27 material slot

28 carrying carriages

29 extension arm

30 roller element

31 spring element

32 spring support

33 secondary reflector Protective cover Trolley Roller element Absorber tube

Claims

P A T E N T A N S P R E C H E

1 . Absorber bearing comprising a support carriage (28) for the suspended mounting of an absorber tube (37) on a rail element,

characterized in that the support carriage (28) has a clamp (22) for

Surrounding the absorber tube (37) with the interposition of one or more over an inner circumference of the clamp (22) distributed, thermally insulating support elements (25) is assigned. 2. absorber bearing according to claim 1, characterized in that it is at the same time at the support elements to electrical insulators.

3. absorber bearing according to one of claims 1 or 2, characterized in that the clamp (22) receptacles for fastening the support elements (25) are each assigned to a spring bar (26), wherein the spring bars (26) between them and the clamp ( 22) include a material slot (27).

4. absorber bearing according to one of the preceding claims, characterized in that the support elements (25) contact the absorber tube (37) and / or the clamp (22) with the interposition of ductile inlays.

5. absorber bearing according to claim 4, characterized in that the ductile inlays are made of copper or aluminum. 6. absorber bearing according to one of the preceding claims, characterized in that the support elements (25) in the circumferential direction of the absorber tube (37) aligned groove which divides the respective support element (25) into two adjacent support webs. 7. absorber bearing according to one of the preceding claims, characterized in that the support carriage (28) has a support body (17) with rollers (18) for guiding on the rail element, wherein the rollers (18) are rotatably mounted on spring webs (19), which are formed by forming a horizontal in the intended position material slot (20) above and / or below the rotatable attachment to the support body (17).

8. absorber bearing according to one of the preceding claims, characterized in that the clamp (22) on both sides cantilever arms (29) for supporting on a absorber tube (37) cross-absorber cover (1) are assigned.

9. absorber bearing according to claim 8, characterized in that the extension arms (29) terminally roller elements (30) for contacting the absorber cover (1). 10. absorber bearing according to one of claims 8 or 9, characterized in that the cantilever arms (29) spring elements (31) are assigned, on which a absorber tube (37) below the absorber cover (1) cross-secondary reflector (33) is attached. 1 1. Absorber bearing comprising a support carriage (28) for the suspended mounting of an absorber tube (37) on a rail element,

characterized in that the support carriage (28) is associated with a clamp (22) for encompassing the absorber tube (37), which on both sides Auslie- gerarme (29) for support on the absorber tube (37) cross absorber cover (1), which preferably terminal elements (30) for contacting the absorber cover (1), wherein the Ausliegerarmen (29) spring elements (31) are assigned, on which a absorber tube (37) below the absorber cover (1) cross-secondary reflector (33) is attached.

12. absorber bearing according to one of claims 10 or 1 1, characterized in that in addition to the secondary reflector (33) a protective hood (34) between the secondary reflector (33) and the absorber cover (1) is arranged, which also indirectly or directly on the Spring elements (31) of the Ausliegerarme (29) is attached.

13. absorber bearing according to claim 12, characterized in that the protective hood (34) is made of sheet steel.

14. Absorber cover for a suspended on a rail absorber tube

(37)

characterized in that it is a downwardly open rail (8), which together with the support carriage (28) and the absorber tube (37) of an absorber hood (2) is overlapped.

Absorber cover according to claim 14, characterized in that the absorber hood (2) by means of distributed over its longitudinal extent porförmi- gene holding frame (5) is held, which engage over the absorber hood (2) in the transverse direction to its longitudinal extent.

16. absorber cover according to claim 15, characterized in that the holding frame (5) has a round or polygonal inner contour (7). 17. absorber cover according to one of claims 15 or 16, characterized in that the holding frame (5) in the region of the inner contour (7) is associated with a designated position downwardly open headband (6) for receiving the rail (8). 18. absorber cover according to claim 17, characterized in that the

Holding bracket (6) of a holding frame (5) in the vertex of its inner contour (7) is arranged.

19. absorber cover according to claim 18, characterized in that the absorber hood (2) in its apex region spaced recesses (3) for receiving the headband (6) and with its outer contour (4) to the inner contour (7) of the holding frame (5 ) fits.

20. Absorbertragvorrichtung for an absorber cover (1) and a suspended absorber tube (37), comprising a plurality of support posts (13), characterized in that the support posts (13) on its the absorber cover (1) side facing a track (16) for a below the absorber cover (1) movable in the longitudinal direction of the carriage (35).

21. Absorbent support device according to claim 20, characterized in that the absorber hood (2) is formed in a plurality of spaced-apart layers to form spring elements.

22. Absorbertragvorrichtung according to any one of claims 20 or 21, characterized in that the absorber hood (2) indirectly or directly on both sides driving surfaces (1 1) or rails are assigned, which are guided parallel to the absorber tube (37).

23 absorber system comprising a Absorbertragvorrichtung according to any one of claims 20 to 22, which carries an absorber cover (1) according to one of claims 13 to 18, wherein in the rail (8) of the absorber cover (1) an absorber bearing according to one of claims 1 to 12 is suspended and carries an absorber tube (37).

24. A method for the construction of an absorber cover, wherein a plurality of substantially gate-shaped, preferably polygonal holding frame (5) is fitted on an adapted to the sheet or polygonal absorber hood (2), wherein arranged at the apex of the holding frame retaining bracket (6) Recesses (3) protrude through the absorber hood (2), one or more counter-locking means successively in the longitudinal direction of the absorber hood (2) are inserted through the retaining bracket (6) and finally the free ends of the support frame (5) with the longitudinal edges of the absorber hood (2) get connected.

25. The method according to claim 24, characterized in that a rail (8) for receiving a support carriage (28) is used as counter-locking means.

26. The method according to claim 25, characterized in that the rail (8) on the absorber hood (2) or the holding frame (5) by means of at least one clamping screw (10) is clamped.