EP3247956A2 - Parabolrinnenkollektormodul, parabolrinnenkollektormoduleinheit sowie solarthermisches kraftwerk - Google Patents

Parabolrinnenkollektormodul, parabolrinnenkollektormoduleinheit sowie solarthermisches kraftwerk

Info

Publication number
EP3247956A2
EP3247956A2 EP16700132.0A EP16700132A EP3247956A2 EP 3247956 A2 EP3247956 A2 EP 3247956A2 EP 16700132 A EP16700132 A EP 16700132A EP 3247956 A2 EP3247956 A2 EP 3247956A2
Authority
EP
European Patent Office
Prior art keywords
absorber tube
trough collector
parabolic trough
absorber
parabolic
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Withdrawn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
EP16700132.0A
Other languages
German (de)
English (en)
French (fr)
Inventor
Martin Eickhoff
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.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsches Zentrum fuer Luft und Raumfahrt eV
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 Deutsches Zentrum fuer Luft und Raumfahrt eV filed Critical Deutsches Zentrum fuer Luft und Raumfahrt eV
Publication of EP3247956A2 publication Critical patent/EP3247956A2/de
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/71—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with parabolic reflective surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
    • 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
    • F24S25/10—Arrangement of stationary mountings or supports for solar heat collector modules extending in directions away from a supporting surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
    • F24S30/42—Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
    • F24S30/425—Horizontal axis
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S2030/10—Special components
    • F24S2030/12—Coupling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S2030/10—Special components
    • F24S2030/15—Bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S2030/10—Special components
    • F24S2030/17—Spherical joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S2030/10—Special components
    • F24S2030/18—Load balancing means, e.g. use of counter-weights
    • 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
    • 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
    • Y02E10/47—Mountings or tracking

Definitions

  • Parabolic trough collector module parabolic trough collector module unit as well
  • the present invention relates to a parabolic trough collector module with an absorber tube, a solar radiation focusing on the absorber tube parabolic trough reflector with a reflector surface and at least one stator device to which the parabolic reflector is mounted pivotably.
  • the invention further relates to a parabolic trough collector module unit having a plurality of parabolic trough collector modules and a solar power plant having a plurality of parabolic trough collector module units.
  • Solar thermal power plants use the energy of sunlight to heat a heat transfer medium, the heat is often used to generate electricity.
  • the solar radiation is focused by means of optical concentrators on an absorber, in which circulates the heat transfer medium.
  • the optical concentrators represent the largest investment in solar thermal power plants and significantly influence their efficiency.
  • a parabolic trough collector contains an elongated collector structure with a parabolic cross-section. Typical aperture openings are 5-7 m.
  • Individual parabolic trough collector modules also called “solar collector element” (SCE)
  • SCE solar collector element
  • Several such modules are assembled into parabolic trough collector units that are generally oriented north-south.
  • the modules of a unit are usually pivoted together to track the parabolic reflectors the sun.
  • the axis of gravity of the modules and thus the axis of rotation of the modules is located near the apex of the parabola and thus away from the absorber tube. Therefore, the absorber tube is usually carried during pivoting.
  • the absorber tubes are connected via special absorber tube holder directly to the parabolic reflector or the supporting structure of the parabolic reflector. Between two independently movable
  • Parabolic trough collector modules are therefore flexible absorber pipe connections necessary, which are created by so-called ball joint connecting lines or swivel joint connecting lines. Such connecting lines are structurally complex and relatively expensive.
  • the flexible absorber pipe connections also lead to a pressure drop and heat losses.
  • the support structure of the parabolic reflector must be designed to be firm and stable in order to absorb the high weight forces of the absorber tube. Since the parabolic reflectors represent the largest investment items, the stable construction of these parabolic reflectors increases the investment costs considerably.
  • the absorber tubes expand when heated by the solar radiation heat-related expansion.
  • the absorber holder must therefore compensate for the axial elongation of the absorber tubes. Therefore, it is provided that the absorber tube holder are usually connected via a hinge or a spring plate tiltable with the parabolic reflector. By tilting the absorber tube holder, the distance between the parabolic reflector and the absorber tube changes, so that the absorber tube can move beyond the focus of the parabolic reflector with a strong tilting of the absorber brackets. This limits the maximum length of parabolic trough collector units and rows of parabolic trough collector units. In addition, at each end of a collector unit or a series of collector units for compensation the axial elongation of the absorber tube compensation devices are provided. These lead to increased investment costs and, moreover, these lead to pressure losses and heat losses during operation.
  • Parabolic trough collector units can be dispensed with.
  • the absorber tubes are still connected directly to the parabolic reflector or the parabolic reflector support structure via absorber tube holder, but continue to exist the problems of Absorberrohrhalterung.
  • a parabolic trough collector module according to the invention is defined by the features of claim 1.
  • a parabolic trough collector unit according to the invention is defined by the features of claim 14.
  • a solar thermal power plant according to the invention is defined by the features of claim 16.
  • a parabolic trough collector module having an absorber tube, a solar reflector focusing on the absorber tube parabolic reflector with a reflector surface and at least one stator device on which the parabolic reflector is pivotally mounted, it is provided that the stator device has a stator over the reflector surface in the vertical direction projecting stator the absorber tube is supported via a linear guide forming a linear bearing. the The invention thus provides that the absorber tube is mounted on the upright device and thus the weight of the absorber tube and the heat transfer medium contained therein during operation is absorbed by the upright device.
  • an absorber tube detached from the parabolic reflector can be provided, so that the requirements for the parabolic reflector are reduced in terms of stability and load-bearing capacity.
  • the parabolic reflector can be produced more cheaply.
  • the absorber tube can expand unhindered when heated by the absorber tube pushes through the linear bearing in accordance with the elongation due to the influence of heat.
  • the absorber tube thus remains even with thermal expansion at the same distance from the reflector surface of the parabolic reflector and complex tilting constructions of previous Absorberrohrhaltern be avoided.
  • a so-called fixed focus construction can be created in an advantageous manner, in which the absorber tube is not pivoted during pivoting of the parabolic reflector. This will make the costly flexible connections between two
  • the stand device may consist of a stand, for example a pylon.
  • the absorber tube may consist of an inner tube, through which the heat transfer medium is passed during operation, and of a cladding tube.
  • the cladding tube is transparent to the solar radiation.
  • the gap formed between the inner and the cladding tube may be evacuated. Through the cladding tube and the evacuated gap heat losses can be reduced.
  • the parabolic reflector is mounted pivotably via a radial bearing, which is arranged around the absorber tube, or around the absorber tube and the linear bearing.
  • a radial bearing By means of such a radial bearing leaves Create a storage for the parabolic reflector in a structurally simple manner in which the axis of rotation runs on the center axis of the absorber tube, so that the parabolic reflector is pivoted about the absorber tube.
  • the absorber tube or the absorber tube and the linear bearing are guided in an advantageous manner through the radial bearing.
  • both the inner tube and the jacket tube of the absorber tube are guided by the radial bearing.
  • the stator device may, for example, have a pipe section through which the absorber pipe or the absorber pipe and the linear bearing are guided, wherein the radial bearing is arranged on the lateral surface of the pipe section.
  • the upright device is connected via at least one holding means with at least one absorber tube holder, which is arranged on a located above the reflector surface portion of the absorber tube and a displaceable in the axial direction of the absorber tube relative to the absorber tube attachment of the absorber tube forms.
  • the absorber tube holder can be located, for example, in the middle of an absorber tube assigned to a parabolic trough collector module according to the invention.
  • the absorber tube holder is fastened exclusively to the holding means and the absorber tube.
  • the absorber tube holder may be connected to the inner tube of the absorber tube, wherein the cladding tube is interrupted at this point.
  • the cladding tube parts may be sealed at the point of interruption to allow evacuation of the gap space.
  • the design of the parabolic trough collector module with at least one holding means, which connects the stand device with at least one absorber tube holder, is an independent inventive aspect, which can be realized without the provision of a linear bearing of the absorber tube to the stator head.
  • the holding means is mounted above the linear bearing on the stator head.
  • the stator head can thus protrude clearly above the absorber tube vertically upwards, so that the holding means can advantageously lead to the absorber tube holder, wherein the transmission of the weight of the absorber tube and the heat transfer medium contained therein can be carried on the stator head and thus on the stand device ,
  • the holding means is a traction means, such as a rope, a rod, a chain or a cable.
  • the holding means thus forms a bracing to the absorber holder.
  • the traction means in the vertical Absorberrohrebene ie the plane which extends in the vertical direction through the center axis of the absorber tube may be arranged.
  • two traction means are provided, each extending at an acute angle to the absorber tube plane. In this way, a lateral stabilization of Absorberrohrhalterept achieved so that it is avoided that the absorber tubes bend in the thermal expansion to the side.
  • the linear bearing has a linear bearing rail extending in the axial direction of the absorber tube, wherein a drive connected to the absorber tube is guided on the linear bearing rail.
  • the drive can be connected to the inner tube of the absorber tube.
  • a linear bearing can be provided in a structurally simple manner. It can be provided that the drive rolls on the linear bearing rail or slides.
  • the drive is suspended in the linear bearing rail, so that the absorber tube is guided along below the linear bearing rail and attached via the drive to the linear bearing rail.
  • the absorber tube holder has an absorber tube holding rail extending in the axial direction of the absorber tube, wherein a drive connected to the absorber tube, for example to the inner tube, is carried along on the absorber tube holder rail.
  • the Absorberrohrhalterung may be formed in a similar manner as the linear bearing.
  • the holding means connects the Absorberhalterungsschlene with the stand device in this embodiment. The drive of the absorber holder rolls on the absorber holder Schlene or slides over it.
  • the Absorberhalterungsschlene is supported with a plurality of holding means, which are connected to the stand device.
  • the holding means are attached to spaced apart articulation points on the Absorberhalterungsschlene, so that the holding means extend at different angles to the rail.
  • This can be relative long Absorberhalterungs rails be realized.
  • the absorber mounting rail extends over the entire absorber pipe length of a parabolic trough collector module. It can the
  • the linear bearing also forms the Absorberrohrhalterung, whereby a very stable linear bearing is obtained, at the same time with respect to the thermal expansion of the absorber tube are no limits, since the absorber tube can be moved virtually unrestricted along the linear bearing rail and the Absorberhalterungsschiene.
  • the linear bearing rail can be attached to the stand device in the region of the stand device. In the case of a rail extending over the entire pipe length of the absorber pipe, which forms both the linear bearing rail and the absorber pipe mounting rail, it can also be provided that no direct fastening of the rail to the stator takes place, but rather that the entire rail is supported by a plurality of retaining means.
  • An absorber tube usually consists of an inner tube, which is surrounded by a transparent to the solar radiation cladding tube, such as a glass tube.
  • the one or more drives that connect the absorber tube with the linear bearing rail and / or with the absorber mounting rail, for example, can be directly connected to the inner tube, wherein the glass tube is interrupted and sealed at this area.
  • the radial bearing has a bearing housing which is connected to a supporting structure of the parabolic reflector.
  • the pivotable mounting of the parabolic reflector can be realized in an advantageous manner, wherein at the same time the weight of the parabolic reflector is transmitted to the stator device.
  • the support structure has a support strut, which is connected to the bearing housing.
  • the support strut can be arranged for example on the front side of the parabolic reflector and connect the longitudinal sides of the parabolic reflector with each other. The support strut thus runs virtually along the chord of the curvature of the parabolic reflector.
  • the stator head has a recess extending orthogonally to the absorber tube, in which the radial bearing is arranged and has a passage tube extending in the axial direction of the absorber tube, which partially penetrates the recess, a radial bearing of the radial bearing on the passage tube is arranged.
  • the storage of the parabolic reflector by means of the radial bearing takes place on the passage tube.
  • the absorber tube or the absorber tube and the linear bearing are guided through the passage tube. In this way, a particularly stable radial bearing can be created.
  • the holding means can engage the stator head.
  • the weight forces transmitted by the parabolic reflector to the stand device can be transmitted centrally to the stand device, wherein an advantageous storage is provided.
  • the support strut penetrates the recess and in particular can be provided that the support strut is located on the radial bearing arranged in the recess.
  • the weight forces of the parabolic reflector can be transmitted in an advantageous manner via the radial bearing on the stator device.
  • the recess causes a lateral guidance of the support struts, thereby avoiding that axial forces are transmitted to the radial bearing to an impermissible extent.
  • the radial bearing has a mounted on the stator head radial bearing and guided in the radial bearing hollow shaft, wherein the absorber tube and the absorber tube and the linear bearing through the hollow shaft therethrough are guided.
  • the linear bearing is supported by separate brackets.
  • the support strut is connected to the hollow shaft.
  • the invention further relates to a parabolic trough collector unit having a plurality of parabolic trough collector modules according to the invention arranged in a row. It is provided that the parabolic trough collector modules have a common, continuous absorber tubing from absorber tubes. Under a common, continuous absorber tubing several firmly interconnected absorber tubes are understood that - with the exception of any interruptions of the ducts - are uninterrupted, the inner tubes are connected to each other, for example by means of flanges or welding.
  • the invention thus makes it possible to create parabolic trough collector units which have a completely continuous absorber tubing. As a result, complex connections of the absorber tubes to connect two adjacent parabolic trough collector modules together, for example, to absorb thermal expansion of the absorber tube or to compensate for different pivoting of the absorber tubes with the associated parabolic reflectors, avoided.
  • two adjacent parabolic trough collector modules each have a common stator device.
  • the adjacent modules thus have a common linear bearing for the connected to an absorber tubing absorber tubes.
  • the holding means of the adjacent grip Parabolic trough collector modules from both sides on the common stand device. Since the male weight forces of the absorber tubes are largely the same, the transmitted from the holding means on the stator device in the axial direction of the absorber tube forces are largely offset from each other. As a result, the stability of the stand device necessary for absorbing the weight forces is lower, so that the stability requirements for the stand device are also lower.
  • a parabolic trough collector unit may have between six and eighteen parabolic trough collector modules.
  • the parabolic trough collector unit has fourteen parabolic trough collector modules.
  • the parabolic trough collector unit can have a common drive for all parabolic trough collector modules combined in the unit.
  • the invention further relates to a solar thermal power plant having a plurality of parabolic trough collector units according to the invention arranged in a row. It is provided that at least two adjacent parabolic trough collector units have a common continuous absorber tubing.
  • the invention thus avoids costly equipment that must be arranged between two parabolic trough collector units conventional solar thermal power plants to compensate for different pivoting movements or thermal expansion of the absorber tubes or absorber strands. This reduces pressure and heat losses. It can be provided, for example, that a plurality of parabolic trough collector units, for example six units, have a common continuous absorber tubing.
  • the continuous absorber tubular string can be several hundred meters long, for example even more than 1000 m, for example 1008 m.
  • the absorber tubing thus consists of a continuous tube, which is composed of several absorber tubes. Due to the provided on each parabolic trough collector module of the solar thermal power plant Linear bearings and the special absorber tube holder, the thermal expansion of the continuous absorber tubing, which can be up to 6 m in an approximately 1000 m long absorber tubing, can be compensated easily.
  • a single fixed bearing is provided, for example, at the arranged at the end of the series stand device, so that the thermal expansion takes place in one direction.
  • a length compensation device for the absorber tubing is then necessary.
  • the fixed bearing is arranged in the middle of a series of parabolic trough collector units, wherein then extends the absorber tubing starting in the middle in both directions with a thermal expansion.
  • the length compensating device may be, for example, a device applying a tensile force to the absorber tubes or the absorber tubing.
  • This can for example consist of a spring device or of a train weight, which is connected via two pulleys with the absorber tubing exist.
  • the end of the absorber tubing is connected to a flexible connection line or to an angular displacement enabling connection line.
  • parabolic trough collector modules and parabolic trough collector units even allows the formation of rows of parabolic trough collector units of more than 1000 m in length, for example up to 2 km in length. Limits are set only by the length compensation of the absorber tubes to be accommodated at the end or at both ends of the row. In the following, the invention will be explained in more detail with reference to the following figures.
  • FIG. 1 shows a schematic perspective illustration of a series of parabolic trough collector modules according to the invention
  • Figure 2a shows a detailed view of the linear bearing of the absorber tube
  • FIG. 2 b shows a detailed illustration of the absorber tube holder of FIG. 1,
  • FIG. 3 shows an alternative embodiment of a device according to the invention
  • FIG. 4 shows a second alternative embodiment of a parabolic trough collector module according to the invention
  • FIG. 5 is a detail of an alternative embodiment of
  • Figure 6 is a schematic representation of a
  • Length compensation device of a solar thermal power plant according to the invention.
  • a parabolic trough collector module 1 according to the invention is shown schematically in a perspective view.
  • Several of the parabolic trough collector modules 1 according to the invention can, as shown in FIG. 1 is indicated, are arranged in a row.
  • Parabolic trough collector modules can be arranged in a row.
  • six arranged in a row parabolic trough collector units according to the invention form a so-called Paraboirinnenkoiiektor a solar thermal power plant according to the invention.
  • An inventive solar thermal power plant may consist of several such parabolic trough collectors.
  • the parabolic trough collectors are usually oriented in a north-south direction.
  • Each parabolic trough collector module 1 has an absorber tube 3. By means of a parabolic reflector 5, which has a reflector surface 7, solar radiation can be reflected onto the absorber tube 3.
  • the parabolic trough collector module 1 has two stator devices 9, on which the parabolic reflector 5 is mounted pivotably. Two adjacent parabolic trough collector modules 1 each share a stand device 9.
  • the absorber tubes 3 of the adjacent parabolic trough collector modules 1 are connected to an absorber tubing 11.
  • the absorber tubes 3 and the absorber tubing 11 are mounted on the stator devices 9 via a linear bearing 13 forming a linear guide.
  • the linear bearing 13 is shown in detail in Fig. 2a.
  • the stand device 9 has a stator head 9a, which, as best seen in FIG. 1, projects beyond the reflector surface 7 in the vertical direction. In this way, in the stator head 9a, the extending above the reflector surface 7 absorber tube 3 can be stored in an advantageous manner.
  • the linear bearing 13 consists of a linear bearing rail 15, which is arranged above the absorber tube 3 and parallel to the absorber tube 3.
  • a drive 17 out On the Linear bearing rail 15 is a drive 17 out, which rolls on the linear bearing rail 15 by means of rollers.
  • the absorber tube 3 is connected to the drive 17 and is suspended by means of the drive 17 in the linear bearing rail 15, so that the absorber tube 3 depends below the linear bearing rail 15.
  • the stator head 9a has a recess 19 which extends in a direction orthogonal to the absorber tubes 3.
  • a radial bearing 21 is arranged for the pivotable mounting of the parabolic reflector 5.
  • the radial bearing 21 is mounted on a passage tube 23 of the stator head 9a.
  • the passage tube 23 extends in the axial direction of the absorber tube 3 and penetrates the recess 19. Through the passage tube 23, the absorber tube 3 is guided. In the absorber tube 3, the linear bearing rail 15 of the linear bearing 13 is further attached.
  • a mounting of the linear bearing 13 is provided on the stator head 9a in a simple manner, wherein at the same time a pivotable mounting of the parabolic reflector 5 can be provided about an axis of rotation which coincides with the central axis of the absorber tube 3.
  • the radial bearing 21 has a bearing housing 25, which is connected to the support structures 27 of the parabolic reflectors 5 of the adjacent parabolic trough collector modules 1.
  • the support structures 27 each have a support strut 29, which is arranged on the end face of the parabolic reflector 5.
  • the support struts 29 connect the longitudinal sides of the parabolic reflector 5.
  • the support struts 29 are guided through the recess 19 in the stator head 9a and extend above the radial bearing 21st
  • the support structure 27 can, as best seen in FIG. 1 can be seen, additional struts 31 to increase the stability of the support structure.
  • the struts 31 are for reasons of clarity in FIG. 2a not shown.
  • the recess 19 in the stator head 9a is configured so large that sufficient space for the additional struts 31 and the support struts 29 during pivoting of the parabolic reflector 5 is present.
  • the parabolic trough collector module 1 has an absorber tube holder 33, which is arranged in the middle of the absorber tube 3.
  • the absorber tube holder 33 is connected via holding means 35 to the stator heads 9a of the stator devices 9.
  • the holding devices 35 may be, for example, cables, so that the absorber tube holder 33 is braced on the stator heads 9a.
  • the absorber tube holder 33 is shown in FIG. 2b shown in detail.
  • the absorber tube holder has an absorber tube holding rail 37 which extends in the axial direction of the absorber tube 3 and which has respective points of engagement for the holding means 35 at its ends.
  • the absorber tube holder 33 can be made independent of the parabolic reflector 5 storage of the absorber tube 3.
  • the absorber tubes 3 consist of an inner tube 3a and a cladding tube 3b, which is transparent to solar radiation. Through the inner tube 3a a heat transfer medium is passed during operation.
  • the drives 17 of the linear bearing 13 and the absorber tube holder 33 are connected to the inner tube 3a.
  • the cladding tube 3b is interrupted at this point.
  • the parts of the cladding tube 3b are sealed at the point of interruption.
  • the linear bearing 13 and the absorber tube holder 33 allow a linear movement of the absorber tube 3 in the axial direction. As a result, thermal expansion of the absorber tube 3 can take place without it being possible for tension or bending of the absorber tube 3 to occur.
  • a holder 9b extending orthogonally to the absorber tube 3 is provided at the upper end of the stator head 9a, to which a plurality of holding means 35 are attached.
  • the holding means 35 thus extend at an angle to a through the central axis of the absorber tube 3 extending vertical plane.
  • the holding means 35 thus engage from above and laterally on the absorber tube holder 33, so that transverse forces, which act on the absorber tube 3, can be accommodated by the holding means 35 in an advantageous manner. This can be prevented in a thermal expansion of the absorber tube 3, that this bends laterally.
  • a second alternative embodiment of parabolic trough collector modules 1 according to the invention is shown.
  • the linear bearing rail 15 extends over the entire length of the absorber tube 3 and thus forms the Absorberrohrhalterungsschiene 37 of Absorberrohrhalterung 33.
  • a plurality of holding means 35 connect this rail with the stator heads 9a of the stator devices 9.
  • Such a configuration has the advantage that a large number parabolic trough collector modules 1 can be arranged in a row, which have a common absorber tubing 11 formed from the absorber tubes 3.
  • the drives 17 which are connected to the absorber tube 3 can be moved freely, so that a thermal expansion of the absorber tube 3 can be made in any length.
  • an absorber tubing string 11 having a length of several 100 m can be realized, in which a thermal expansion of several meters can occur.
  • Fig. 5 an alternative embodiment of the radial bearing of the parabolic reflector 5 is shown.
  • the support struts 29 are guided laterally past the stator head 9a.
  • a radial bearing 39 is arranged at the stator head 9a.
  • the radial bearing 39 rotatably supports a hollow shaft 41 on the stator head 9a.
  • the support struts 29 of the support structures 27 are attached.
  • the absorber tube 3 and the linear bearing rail 17 are guided through the hollow shaft 41.
  • the linear bearing rail 17 must be designed so long that it can be held by holding means 35, or it must be provided a separate, not shown in FIG. 5 holder.
  • FIG. 6 schematically shows the end of a collector formed by a plurality of parabolic trough collector units 100.
  • the absorber tubing 11 protrudes over a distance X out.
  • a connecting pipe 43 is connected to the absorber pipe string 11, which allows a change in length of the absorber strand 11. This can be done for example via an angular adjustment of the connecting pipe 43.
  • a length compensation device 45 which exerts a pulling force on the absorber pipe string 11 by means of a cable pull 47 and a weight 49. It is thereby achieved that, when the absorber strand 11 is elongated, this takes place in a linear direction and bending of the absorber tubing 11 can not occur.
  • parabolic trough collector modules 1 By means of the parabolic trough collector modules 1 according to the invention, it is possible to form collectors of several hundred meters in length, which can be provided in a stable and cost-effective manner, since elaborate connections, such as ball joints, can be dispensed with. As a continuous absorber tubing 11th can be created, in addition, pressure and heat losses can be reduced.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)
  • Photovoltaic Devices (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
EP16700132.0A 2015-01-23 2016-01-08 Parabolrinnenkollektormodul, parabolrinnenkollektormoduleinheit sowie solarthermisches kraftwerk Withdrawn EP3247956A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202015000425.3U DE202015000425U1 (de) 2015-01-23 2015-01-23 Parabolrinnenkollektormodul, Parabolrinnenkollektormoduleinheit sowie solarthermisches Kraftwerk
PCT/EP2016/050292 WO2016116304A2 (de) 2015-01-23 2016-01-08 Parabolrinnenkollektormodul, parabolrinnenkollektormoduleinheit sowie solarthermisches kraftwerk

Publications (1)

Publication Number Publication Date
EP3247956A2 true EP3247956A2 (de) 2017-11-29

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Country Status (7)

Country Link
US (1) US10859291B2 (zh)
EP (1) EP3247956A2 (zh)
CN (1) CN107429946B (zh)
AU (1) AU2016208803B2 (zh)
DE (1) DE202015000425U1 (zh)
WO (1) WO2016116304A2 (zh)
ZA (1) ZA201704989B (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800004615A1 (it) * 2018-04-17 2019-10-17 Concentratore solare con superficie parabolica riflettente continua
DE202019104454U1 (de) 2019-08-13 2020-11-19 Deutsches Zentrum für Luft- und Raumfahrt e.V. Parabolrinnenkollektormodul, Parabolrinnenkollektormoduleinheit sowie solarthermisches Kraftwerk
SE544851C2 (en) * 2021-04-15 2022-12-13 Absolicon Solar Collector Ab A suspension device for a parabolic reflector solar device

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CN107429946B (zh) 2019-07-26
ZA201704989B (en) 2021-02-24
WO2016116304A2 (de) 2016-07-28
AU2016208803A1 (en) 2017-08-10
US20180023845A1 (en) 2018-01-25
CN107429946A (zh) 2017-12-01
DE202015000425U1 (de) 2016-04-26
US10859291B2 (en) 2020-12-08
AU2016208803B2 (en) 2021-03-25
WO2016116304A3 (de) 2016-11-17

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