WO2015158415A1 - Receiver assembly of a solar tower power plant - Google Patents

Abstract

The invention relates to a receiver assembly that is suitable for a solar tower power plant, which receiver assembly comprises a supporting structure and a cavity, which has a radiation inlet opening for concentrated solar radiation. The cavity is bounded at least largely by a sequence of individual receiver modules (10), which are supported by the supporting structure and are arranged adjacently to each other. The receiver modules each have an absorber structure (27) facing the radiation inlet opening of the cavity and a chamber (14), through which a heat-transfer fluid can flow from an inlet (15) to an outlet (16). The ratio of the three-dimensional surface of the absorber structure (27) exposed to the solar radiation to the area of the absorber structure (27) projected in the center plane of the absorber structure is at least 1.4. A prevailing flow direction (W) of the heat-transfer fluid through the chambers (14) of the receiver modules (10) is oriented transversely to a normal vector standing perpendicularly on the center plane of each absorber structure (27).

Description

 Receiver arrangement of a tower solar power plant

The present invention relates to a

Receiver arrangement of a tower solar power plant.

Tower solar power plants, in which solar radiation is concentrated by means of a mirror arrangement (so-called "heliostat data field") on a receiver arranged on a tower, are known in a wide variety of designs, for example WO 2014/026746 A1, US Pat. No. 4,220,140 A WO 2008/153922 A1, DE 102010034986 A1 and WO 2012/150344 A1 With regard to the design of the receivers (receivers) in which the concentrated solar radiation is typically converted into sensible heat (or possibly completely or partially into latent heat), There is a considerable range of different structural and

conceptual approaches. According to one of the concepts, the receiver arrangement comprises one towards the heliostat, i. typically more or less downwards, open cavity into which concentrated solar radiation enters through a radiation inlet opening (see WO 2014/026746 Al). The

Solar radiation reaches an absorber. There, it is converted into heat, which is continuously removed by means of a heat transfer fluid and a heat sink, implemented.

The present invention has set itself the goal of a particularly efficient in terms of efficiency provide favorable receiver arrangement of a tower solar power plant, with "efficiency" in this

Context is widely understood and includes not only high efficiency in operation, but also aspects of cost-effective production. For the cost of a power plant, both the costs of construction as well as the income from ongoing operations and ongoing operating costs (such as maintenance) are of significant influence.

The aforementioned object is achieved according to the present invention by the specified in claim 1 receiver arrangement of a tower solar power plant. The receiver assembly according to the invention is thus characterized by a number of interrelated features that interact

mutually positively influence the profitability of a tower solar power plant. Thus, the receiver arrangement comprises a support structure and a cavity which has a (possibly subdivided) radiation entrance opening for concentrated solar radiation. The cavity is at least predominantly limited by a sequence of individual, carried by the support structure adjacent to each other arranged receiver modules. The latter each have one of

Radiation inlet opening facing the cavity

Absorber structure and one of a heat transfer fluid from an inlet to an outlet through-flow chamber, wherein as the "radiation inlet opening of the cavity facing" an absorber structure then is to be considered, if directly through the radiation entrance opening into the avitat radiation, ie without prior reflection within the cavity, can reach the absorber structure. The the

Solar radiation exposed surface of the

Absorber structure is executed in three dimensions. It is thus larger than that in its middle plane

projected area of the absorber structure, wherein

According to the invention, the ratio between the two surfaces is at least 1.4, which leads to a corresponding "dilution" of the average radiation flux densities and has a positive effect on the efficiency in cooperation with the further features of the receiver arrangement according to the invention. through the chambers of the receiver modules is transverse to one on a median plane of the respective

Absorber structure oriented perpendicular normal vector. The center plane of the (three-dimensional) absorber structure is to be considered that plane which minimizes the sum of the squared distances of the points of the absorber surface to the center plane. As oriented transversely to the normal vector of this center plane, the main flow direction of the heat transfer fluid is considered to be when it includes with the said normal vector an angle of 90 ° V-45 °, preferably of 90 ° ⁺ / _ 30 °.

The orientation of the receiver modules or their

Absorber structure within the receiver assembly is In this case, it is preferably selected such that the normal vector of the center plane of the absorber structure coincides with the "main irradiation direction" of the relevant receiver module, ie the integrated over time, with the

Radiation intensity weighted irradiation direction, an angle of not more than 30 °. One of the receiver arrangement according to the invention

determining characteristics is accordingly that in the individual receiver modules, the heat transfer fluid through the chambers provided for this purpose with a

Main flow direction from an inlet to an outlet, wherein said main flow direction transversely (for example, but not

exclusively vertical) to one on one

Center plane of the respective absorber structure is oriented perpendicular normal vector. The absorber of the receiver assembly is housed in a variety of individual receiver modules, which

adjacent to each other, the cavity limit. The flow through the chambers of the receiver modules with a transverse to one on a median plane of the

respective absorber structure vertical

Normalvektor oriented main flow direction, whereby typically the main flow direction of the heat transfer fluid also more or less transversely oriented (eg at an angle between 45 ° and 135 °, preferably between 60 ° and 120 °, more preferably between 70 ° and 110 °) to the main irradiation direction of the respective absorber structure is, allows it with simple means an influence on the for the Heating the heat transfer fluid authoritative

Temperature profile, so that the temperature of the

Heat transfer fluids when leaving the receiver assembly can be optimally adapted to the - resulting from the other components - requirements.

The latter also applies considering strongly changing radiation intensities. The temperature deviation of the heat carrier fluid in the respective receiver module and in the receiver arrangement as a whole can be in

Implementation of the present invention to be optimized, which also contributes that - regardless of

cost-saving modularity of the receiver assembly - the fluidic interconnection of the flow-through chambers of the individual receiver modules can be designed specifically to the respective requirements. This is one with regard to one

efficient operation, which, moreover, can be achieved with reduced production costs for the solar power plant compared to the state of the art. Because the "lining" of the cavity by a sequence of individual receiver modules is extremely attractive in view of the costs associated with the construction of the solar power plant.

A first preferred embodiment of

inventive receiver arrangement is characterized in that the receiver modules at least along a substantial portion of their extension in

Main flow direction are substantially cylindrical. "Cylindric" is in the widest sense to understand that the cross section of the receiver modules transverse to the main flow direction

at least along a substantial part of the

Extension of the receiver modules not, at least not significantly changes. In that regard, the receiver modules, as in a preferred embodiment

is provided, in particular prismatic running. Such a cylindrical, in particular

prismatic design of the receiver modules facilitates their design in terms of mechanical and thermal loads and favors the integration of the receiver modules with the other components to the receiver assembly. In addition, by the im

Substantially cylindrical shape of the receiver modules in their production to a considerable extent identical parts are used, which is a corresponding

cost-effective production allows.

Particularly preferably, the largest extent of the receiver modules is oriented along the main flow direction of the heat transfer fluid. In this case, the advantage set out above is one of particular

flexible influence on the decisive for the heating of the heat transfer fluid temperature profile in a special way to bear. Optimal temperature strokes of the heat transfer fluid in the respective receiver module and in the receiver arrangement as a whole are possible. In the case of a suitable shape of the receiver arrangement and the cavity defined therein, with regard to a lining of the cavity which is as closed as possible, the cavity is Receiver arrangement by adjacent to each other

Receivermodule particularly favorable, if the latter have a substantially cuboid basic shape. This also facilitates the piping of the receiver modules with each other, which will be discussed later. With different geometries of the receiver arrangement (for example, more or less pronounced on a dome shape

approximate) turn out - in the interest of one

As close as possible lining of the cavity of the receiver assembly - modified accordingly

Geometries of the receiver modules as favorable.

According to a preferred embodiment of the present invention is the solar radiation

exposed surface of the absorber structure within the - traversed by a heat transfer fluid - chamber of the respective receiver module. The solar radiation exposed surface of the absorber structure is exposed directly to the heat transfer fluid in this development. This allows a particularly favorable design under consideration of the thermodynamic efficiency. Also the dynamics, with which the

Solar power plant can respond to changing insolation conditions benefits from it.

The absorber structure can in particular a

Have a plurality of spaced apart absorber elements which are flowed around by heat transfer fluid by being arranged in the chamber of the respective receiver module and / or projecting into this. The directly exposed to the heat transfer fluid surface of the absorber structure can be in this way

Optimizing aspects of efficiency. Thus, in this embodiment of the absorber structure by suitable arrangement and design of the absorber elements, the ratio of the solar radiation exposed three-dimensional surface of the absorber structure to the projected in the center plane surface of the

Set absorber structure in a - for typical applications - for efficiency particularly favorable range between 10 and 30. In this case, the absorber elements particularly preferably project from a base of the relevant absorber structure in the direction of the radiation inlet opening of the cavity. The latter is of course not to be understood so narrowly that the

Absorber elements are aligned exactly on the radiation entrance opening. Rather, that's enough

Definition that the absorber elements protrude from a base of the respective absorber structure in the direction of the radiation entrance opening, already such a configuration in which the absorber elements along their extension away from the base more or less strongly the radiation entrance opening of the

Close the cavity. Preferably, such an extension of the absorber elements, which with the respective

Main irradiation direction includes an angle of not more than 45 °, more preferably of not more than 30 °. In this sense, the extension of the absorber elements with the normal vector of

Center plane of the absorber structure prefers an angle of not more than 45 °, more preferably not more than 30 °.

It is particularly advantageous if the cross section of the absorber elements tapers from the base in the direction of the radiation inlet opening. The

Absorber elements have in this case, in other words, close to the base of a larger cross section than away from this, in particular a

pronounced end face of the absorber elements is avoided. This is with regard to a possible

homogeneous energy input into the absorber elements of great advantage; because in this way is to the

Absorber elements also relatively close to the base solar radiation converted into heat. A

thermodynamically unfavorable strongly unequal

Temperature distribution over the extension of

Absorber elements is prevented in this way; the result is a particularly efficient entry of the sensible heat generated in the absorber elements in the heat transfer fluid, which in turn positively the efficiency and thus the efficiency of the solar power plant

influenced.

It is also advantageous from the standpoint of high efficiency if the absorber elements have a non-circular cross-section at least in regions such that their extent is greater transversely to the main flow direction of the heat transfer fluid than in the main flow direction. The advantages of this staltung are primarily in a particularly favorable entry of heat from the heat transfer fluid

immersed absorber elements in the heat transfer fluid into it.

Yet another preferred development of the present invention is characterized in that the chamber is delimited by a disc curved along a cylinder section towards the chamber. Again, "cylinder" is again to be understood with a broad meaning (see above) and not on one

circular cylindrical design of the disc limited. Due to the one-dimensional curvature of the disc, this is relatively easy to detect static, which is an essential aspect in particular for printed (pressurized) chambers. The latter applies

in particular for receiver arrangements, which the

Heating a gas or gas mixture (in particular air) serve for the subsequent direct admission of a gas turbine. As to be printed in this

Connection of receiver modules (or their from the

Heat transfer fluid flowed through chambers) understood then, if they are designed for a pressure of at least 2 bar. Especially here, the limitation of the chamber described above by means of a disc, which is curved along a cylinder portion towards the chamber, shows particular advantages. In addition to the particularly simple statics direct direct cost advantages come into play, which with the modularity of the

crucial structural components of the Receiver arrangement related. Within the chamber can between the absorber structure and the

Disc be arranged a heat screen. This protects the disc from heat radiation, which is emitted from the hot absorber structure, and from direct contact with the heat transfer fluid heated at this. The heat shield, which in turn heats up in this way, serves to some extent - as

Convection surface - even the heating of the

Heat transfer fluids. The latter is flowing

expediently not only in that between the

Absorber structure and the heat shield lying area of the chamber, but rather, in order to cool the disc, also in the area between the heat shield and the disc. The heat shield is in this way due to the mutual flow around with

Heat transfer fluid - even with pressurized

Heat transfer fluid - no special outer

exposed to mechanical forces. He can thereby be carried out inexpensively and easily, and it requires no sealing of the heat shield against the

Housing of the relevant receiver module. The forces resulting from the pressurized heat transfer fluid thus concentrate on the - preferably cylindrically curved - disc.

Another preferred development of the invention is characterized in that the surface of the absorber structure exposed to the radiation is not inside but rather outside the chamber of the absorber structure is located in the relevant receiver module. One of

Advantages of this design, in which the

Heat transfer fluid not directly at the through the

Solar radiation heated surface of the

Absorber structure flows along, is the ability to optimize the implementation of solar radiation into sensible heat on the one hand and the transmission of heat in the heat transfer fluid serving surfaces uncompromisingly to the respective task. Furthermore, there is a certain temporal and local

Equalization of the heat flow through the

thermally conductive structure on the way from the implementation of solar radiation in sensible heat

serving surface for the transmission of heat in the heat transfer fluid serving surface.

In this development of the invention, the absorber structure preferably comprises a three-dimensional

formed, surveys and depressions

Absorber plate, which is exposed on one of its main surfaces of the solar radiation and on its other major surface of the heat transfer fluid. According to their function, the absorber plate is preferably complete or

mainly made of a material with high

 Thermal conductivity. To optimize their function, the surface exposed to the solar radiation may have a coating or other surface refinement. In a similar way, the

Absorber plate consist of a multi-layer composite material. The chamber is preferred in this development by the absorber plate and a back plate structure

limited, wherein the absorber plate and the

Back plate structure typically more preferably over a predominant area proportion in the

Maintain substantially constant distance from each other, but also a targeted modification of the distance the absorber plate and a back plate structure to each other comes into consideration to influence the flow velocity via a corresponding change in the flow cross section for the heat transfer fluid. This can be done through the chamber

ensure interspersed, the absorber plate and the back plate structure interconnecting spacers, which in pressurized

Heat transfer fluid absorb a tensile stress.

Furthermore, in view of the already highlighted above optimization of the transfer of heat into the heat transfer fluid flowing through the chamber - in the chamber connected to the absorber plate

Heat transfer elements may be arranged, such as

For example, ribs, pins, plates or

like. These heat transfer elements, as far as they are from the absorber plate to the

Back plate structures extend and also with the

Back plate structures are firmly connected, in addition, the function of the above-explained

Perceive spacers. An optimization of the receiver arrangement in terms of their efficiency under changing irradiation conditions can, according to yet another embodiment of the invention, achieve that the receiver modules heat transfer fluid side are networked together by means of a piping, which receiver modules interconnecting pipe sections and integrated therein switchable valve devices , By means of the switchable valve devices can be demand-dependent influence on the individual fluidic interconnection of the individual receiver modules with each other, in particular by individual receiver modules and / or receiver module packages are selectively switched from a connection in parallel flow mode in a circuit in series flow mode and vice versa.

In the following, the present invention will be explained in more detail with reference to exemplary embodiments illustrated in the drawing. It shows

 1 shows the basic structure of a tower solar power plant,

 Fig. 2 obliquely from above schematically used in the tower solar power plant of FIG. 1, according to the invention executed

 Receiver arrangement

 3 shows the receiver arrangement according to FIG. 2 in FIG

 schematic view diagonally from below.

Further illustrated Fig. 4 shows a first embodiment of an im

 Can be used within the scope of the invention

 Receiver module,

 Fig. 4a schematically relevant geometric

 Correlations of the absorber structure of the

 Receiver module according to Fig. 4 and

 Fig. 5, the absorber arrangement of a second

 Exemplary embodiment of a receiver module which can be used within the scope of the invention.

As shown schematically in Fig. 1, tower solar power plants typically include a

Mirror arrangement 1 with a plurality of mirrors 2 and a tower 3, which has a mast 4 and a receiver arrangement 5 arranged thereon. The mirrors 2 (heliostats) are moving and by means of drives

adjustable in such a way that it continuously impinging sunlight on the receiver assembly. 5

reflect. The receiver assembly 5 has a

Cavity, i. an avidity, with a downwardly facing radiation entrance opening (see above), through which the solar radiation S reflected by the heliostat 2 enters the cavity, where it impinges on absorber surfaces and into sensible heat

is implemented.

The mast 4 serves not only to hold the receiver assembly 5 in a certain position above the mirror assembly 1 (heliostat field); in him

in particular also runs at least one line for a heat transfer fluid, by means of which in the

Receiver assembly 5 generated heat is dissipated to a (not shown) technical heat sink, in which the heat is used, for example, to generate electricity.

As shown in FIGS. 2 and 3, the receiver assembly 5 includes a fixed to the mast 4

Support structure 6. This is embodied here as an outer shell 7 and comprises four side walls 8 and a top wall 9. A plurality of individual receiver modules 10 are attached to the support structure 6 in such a way that a sequence of individual receiver modules 10 arranged adjacent to each other surrounds the cavity 11

limited. The receiver modules 10 dress while the

Supporting structure 6 to a certain extent inside and surround or enclose the cavity 11 - with the exception of the radiation inlet opening 12

completely. According to the schematic drawing of Figures 2 and 3, for reasons of illustration on each side wall 8 of the support structure 6 and the top wall 9 mounted example, only eight receiver modules 10 are shown. In practical implementation, the number of

Receiver modules 10 typically be greater by a multiple.

The individual receiver modules 10 are constructed in the same way. They have an approximately cuboid elongated basic shape and each have one of the radiation inlet opening 12 of the cavity 11 facing, ie the Absorber structure 13, which is exposed to concentrated solar radiation and reflected by the heliostat 2, and a chamber 14 through which a heat transfer fluid can flow. The heat transfer fluid flows through the chamber 14 in each case from an inlet 15 to a

Outlet 16 with a prevailing flow direction W, which transverse to the direction of irradiation B of

respective absorber structure is oriented.

The receiver modules 10 are heat transfer fluid side networked together by means of a fluid conduit 17. This has receiver modules 10

interconnecting pipe sections 18, namely pipe bends 19 for the series coupling of two

Receivermodule 10 and connectors 20 partially with integrated switchable valve devices 21. By means of the latter, the receiver modules 10 can be different depending on demand

fluidically interconnect.

FIG. 4 illustrates a receiver module embodiment which can be used within the scope of the present invention, as it is particularly suitable in particular for solar power plants with pressurized air as the heat transfer fluid. The receiver module 10 shown again has a cuboid elongated basic shape with a bottom 22, two side walls 23 and two

End walls 24. Opposite the bottom 22, that is, on its the radiation inlet opening 12 of the cavity 11 side facing the receiver module 10 a the side walls 23 and the end walls 24 tightly connected, inwardly curved disc 25. This limits together with the bottom 22, the

Side walls 23 and the end walls 24 of the

Receiver module 10 of heat transfer fluid

durchströmbare chamber 14. In the end walls 24 of the receiver module 10, the inlet 15 and (opposite) the outlet 16 for the chamber flowing through

Heat transfer fluid arranged. The largest extension of the receiver module 10 is along the prevailing

Flow direction of the heat transfer fluid through the

Chamber 14 of the receiver module 10 (see

Main flow direction W of the heat transfer fluid)

oriented.

In the receiver module according to FIG. 4, the surface 28 of the solar radiation S is located

Absorber structure 27, at which the solar radiation S is converted into sensible heat, in the chamber 14. The absorber structure 27 has a plurality of arranged in the chamber 14, spaced from each other, can be flowed around by heat transfer fluid absorber elements 28. These are designed as pins 29, which project in the direction of the radiation inlet opening from the bottom 22 of the receiver module, which forms the base 30 of the absorber structure 27. The shape of the pin 29 is reminiscent of a flattened truncated cone.

In particular, the cross section of the pins 29 tapers from the base 30 in the direction of the radiation inlet opening 12 of the cavity 11; and the pins 29 have a non-circular cross-section such that their extension transversely to the main flow direction W of

Heat transfer fluid is greater in the main flow direction. The main flow direction W of the heat transfer fluid is in turn transverse to a perpendicular to the center plane M of the absorber structure 27

Normal vector N oriented (see Fig. 4a), whereby the main flow direction W of the heat transfer fluid

furthermore oriented transversely to the main irradiation direction B.

Within the chamber 14 between the absorber structure 27 and the disc 25 is a heat shield 31st

arranged. This extends between the

Side walls 23 and the end walls 24 of the

Receivermoduls 10. He is mechanically not burdened by the used as heat transfer fluid

Pressurized air on both sides of the

Heat screen 31 flows along.

FIG. 5 illustrates an absorber structure 27 which corresponds to a significantly different conception, as can also be used with receiver modules 10, as used in the context of the present invention. The absorber structure 27 comprises a zigzag-shaped, elevations 32 and depressions 33 having absorber plate 34. This is on its the radiation inlet opening 12 of the cavity 11 facing first main surface 35 of the solar radiation S and at its other major surface 36 the Heat transfer fluid is exposed. For this purpose, the chamber 14, which flows through the heat carrier fluid, bounded on the one hand by the absorber plate 34 and on the other hand by a back plate structure 37, which maintains a substantially constant distance to the absorber plate 34. In the chamber 34 heat-conducting connected heat transfer elements 38 are arranged in the form of ribs 39 with the absorber plate, which - are firmly connected - for purposes of stiffening - with the back plate structure 37. The ribs 39 can - by suitable design - also for generating targeted turbulence within the chamber 14 flowing through

Heat carrier fluids are used, which promotes both the heat transfer and contributes to a homogeneous temperature of the heat transfer fluid.

Unlike the embodiment previously described (in connection with FIG. 4), the embodiment of FIG

Solar radiation S exposed surface 26 of the

Absorber structure 27 outside the chamber 14 of the

relevant receiver module. Coincidentally, but also in this embodiment, a

Flow through the chamber by the heat transfer fluid with a prevailing flow direction W, which is oriented transversely to the irradiation direction B of the absorber structure 27. However, like that

Embodiment of FIGS. 4 and 4a the

Main flow direction W of the heat transfer fluid again transverse to one on the median plane M of Absorber structure oriented perpendicular normal vector N, whereby the main flow direction of the heat transfer fluid is also in turn oriented transversely to the main irradiation direction B.

Claims

claims 1. Receiver arrangement (5) of a tower solar power plant, comprising a support structure (6) and a cavity (11) having a radiation inlet opening (12) for concentrated solar radiation (S), wherein the cavity (11) at least predominantly by a sequence of individual, supported by the support structure (6), arranged adjacent to each other  Receiving modules (10) is limited, which in each case one of the radiation inlet opening (12) of the cavity (11) facing the absorber structure (27) and one of a heat transfer fluid from an inlet (15) to an outlet (16) through-flow chamber (14), wherein the absorber structure in each case has a center plane (M) which is defined by the minimum of the sum of the squared distances of the points of the absorber surface to the center plane, the ratio of the three-dimensional surface of the absorber structure (27) exposed to solar radiation (S) to that in its center plane ( M) projected area of the absorber structure (27) is at least 1.4 and a prevailing flow direction (W) of the heat transfer fluid (main flow direction) through the chambers (14) of the receiver modules (10) transversely to one on the median plane (M) of the respective absorber structure ( 27) vertical  Normal vector (N) is oriented. Receiver arrangement according to claim 1, characterized  characterized in that the receiver modules (10) at least along a substantial part of their Extension in main flow direction (W) in Are substantially cylindrical, in particular prismatic. Receiver arrangement according to claim 1 or claim 2, characterized in that the largest extension of the receiver modules (10) along the Main flow direction (W) is oriented. Receiver arrangement according to one of claims 1 to 3, characterized in that the receiver modules (10) has a substantially cuboidal basic shape exhibit. Receiver arrangement according to one of claims 1 to 4, characterized in that the Solar radiation (S) exposed surface of Absorber structure (27) within the chamber (14) of the respective receiver module (10) is located. Receiver arrangement according to claim 5, characterized characterized in that the absorber structure (27) a plurality of spaced apart Absorber elements (28), which of Heat transfer fluid can be flowed around by being arranged in the chamber (14) of the relevant receiver module (10) and / or projecting into this. Receiver arrangement according to claim 6, characterized characterized in that the absorber elements (28) from a base (30) in the direction of the Radiation inlet opening (12) of the cavity (11) protrude. 8. Receiver arrangement according to claim 6 or claim 7, characterized in that the cross section of the absorber elements (28) from the base (30) in the direction of the radiation inlet opening (12) of the cavity (11) tapers. 9. Receiver arrangement according to one of claims 6 to 8, characterized in that the absorber elements (28) at least partially a non-circular  Have cross-section such that their  Extension transverse to the main flow direction (W) of the heat transfer fluid is greater than in  Main flow direction (W). 10. Receiver arrangement according to one of claims 6 to 9, characterized in that the ratio of the solar radiation (S) exposed three-dimensional surface of the absorber structure (27) to the in the center plane (M) projected surface of the  Absorber structure (27) is between 10 and 30. 11. Receiver arrangement according to one of claims 5 to 10, characterized in that the chamber (14) is bounded by a along a cylinder portion to the chamber arched disc (25). 12. Receiver arrangement according to claim 11, characterized in that a heat screen (31) is arranged within the chamber (14) between the absorber structure (27) and the disk (25). 13. Receiver arrangement according to one of claims 1 to 4, characterized in that the radiation (S) exposed surface of the absorber structure (27) outside the chamber (14) of the respective  Receiver module is located. 14. Receiver arrangement according to claim 13, characterized  in that the absorber structure (27) has a three-dimensionally shaped elevations (32) and  Recessed (33) having absorber plate (34), which on one of its main surfaces (35) of the solar radiation (S) and at its other  Main surface (36) is exposed to the heat transfer fluid. 15. Receiver arrangement according to claim 14, characterized  characterized in that the chamber (14) is bounded by the absorber plate (34) and a  Back plate structure (37). 16. Receiver arrangement according to claim 15, characterized  characterized in that the absorber plate (34) and the back plate formation (37) over a predominant area proportion a substantially constant  Keep distance to each other. 17. Receiver arrangement according to claim 15 or claim 16, characterized in that in the chamber (14) with the absorber plate (34) connected heat transfer elements (38) are arranged. 18. Receiver arrangement according to claim 17, characterized characterized in that the heat transfer elements (38) at least partially between Absorber plate (34) and back plate structures (37) extend and are also firmly connected to the back plate structure (37). Receiver arrangement according to one of claims 1 to 18, characterized in that the receiver modules (10) heat transfer fluid side with each other fluidically connected by means of a piping (17), which receiver modules (10) having interconnecting pipe sections (18) and in this integrated switchable valve means (21) for selectively interconnecting Receiver modules (10) in parallel flow operation on the one hand and serial flow operation on the other.