Rotor

Abstract

The invention relates to a rotor (1), in particular a rotary heat pump, comprising a rotary shaft (2), a plurality of compression ducts (15), in which a working medium, in particular a gas, preferably a rare gas, is conducted away from the rotary shaft (2) in order to increase the pressure caused by centrifugal acceleration, a plurality of expansion ducts (20), in which the working medium is conducted towards the rotary shaft (2), the invention relates to a heat exchanger (10) for a working medium, in particular a liquid, in order to reduce the pressure caused by centrifugal acceleration, a plurality of first heat transfer ducts (18) for the working medium, and a plurality of second heat transfer ducts (22) for a heat transfer medium, in particular a liquid, in order to transfer heat between the working medium flowing in the first heat transfer ducts (18) and the heat transfer medium flowing in the second heat transfer ducts (22), a plurality of first (10) and second (11) rotor plates, comprising the compression duct (15), the expansion duct (20), the first heat transfer duct (18) for a working medium and the second heat transfer duct (22) for a heat transfer medium, the first (10) and second (11) rotor plates being interconnected along their main extension planes.

Description

Technical Field

[0001] The present invention relates to a rotor, in particular a rotary heat pump, comprising:

[0002] Axis of rotation,

[0003] a plurality of compression ducts in which a working medium, in particular a gas, preferably a noble gas, is led away from the rotating shaft in order to increase the pressure caused by centrifugal forces,

[0004] a plurality of expansion ducts in which the working medium is directed towards the rotating shaft in order to reduce the pressure caused by centrifugal forces,

[0005] a plurality of first heat transfer conduits for a working medium, and

[0006] A plurality of second heat transfer conduits for a heat transfer medium, in particular a liquid, so that heat is transferred between the working medium flowing in the first heat transfer conduits and the heat transfer medium flowing in the second heat transfer conduits. Background Art

[0007] A rotary heat pump is known from WO2015 / 103656, in which the centrifugal acceleration of the rotor is used to generate different pressure and temperature levels. High-temperature heat is extracted from the compressed working medium and relatively low-temperature heat is provided to the expanded working medium. To this end, the rotary heat pump comprises an internal heat exchanger and an external heat exchanger, which are arranged essentially parallel to the axis of rotation of the rotor. The internal heat exchanger is arranged to exchange heat at a lower temperature and the external heat exchanger is arranged to exchange heat at a higher temperature. This type of rotary heat pump has significant advantages over stationary heat pumps. However, a disadvantage is the high structural complexity of the known rotary heat pumps. In addition, improvements are needed with regard to the rotor dynamics, which in the prior art are impaired by the mechanical connection of the individual components. Finally, efforts have been made to further improve the efficiency (COP - coefficient of performance) of such rotary heat pumps. Summary of the invention

[0008] It is therefore an object of the present invention to mitigate or eliminate at least some of the disadvantages of the prior art.A preferred object of the present invention is to produce a rotor combining low construction effort with high efficiency.

[0009] This object is achieved by a rotor according to claim 1 and a method according to claim 13. Preferred embodiments are given in the dependent claims.

[0010] According to the invention, a plurality of first and second rotor plates are provided, wherein the first and / or second rotor plates comprise a compression duct, an expansion duct, a first heat transfer duct for a working medium and a second heat transfer duct for a heat transfer medium, wherein the first and second rotor plates are connected to one another along their main extension plane.

[0011] The arrangement of the first and second rotor plates forms a compact rotor element which is particularly stable against rotational forces and combines the functions of individual components which are divided in the prior art into internal and external heat exchangers and expansion and compression ducts. To form the rotor element, the first and second rotor plates are stacked in contact with each other and connected to each other at the main extension plane where they meet. In the first and / or second rotor plate, the working medium flows through flow ducts which form the first heat transfer duct, the compression duct and the expansion duct. Thus, the heat transfer medium flows through the second heat transfer duct of the first and / or second rotor plate in order to transfer heat with the working medium. So-called "microchannel diffusion-bonded heat exchangers" are known in the prior art, see, for example, EP3885691A1, in which stacks of heat exchanger plates with integrated flow channels are connected to each other by diffusion connection (diffusion bonding). However, the present invention not only replaces the internal heat exchanger and the external heat exchanger of the known rotary heat pump with a heat exchanger of this type, but also integrates the expansion duct and the compression duct into the first and second rotor plates of the rotor element. Therefore, in the flow duct of the rotor element, not only heat transfer between the working medium and the heat transfer medium takes place, but also compression of the working medium when flowing away from the rotating shaft and expansion of the working medium when flowing toward the rotating shaft. This makes it possible to produce a rotor, in particular a rotary heat pump or a heat engine for providing electric current from a heat flow, in which the basic process steps are integrated into the interior of the package of the first and second rotor plates. This structure achieves particularly advantageous rotor dynamics. In particular, it has proven to be advantageous that the first and second rotor plates can hardly move relative to each other, so that the number of balancing operations can be significantly reduced or balancing operations can be completely avoided. In addition, the rotor element composed of the first and second rotor elements can realize different designs, in particular also smaller dimensions. This has the advantage that production can be simplified and a less powerful drive unit can be used. Compared with the discrete heat exchangers in the prior art, the heat exchanger surface available during rotor operation can also be increased. The integral design of the rotor element also means that the number of sealing points can be significantly reduced.

[0012] For the purposes of this disclosure, indications of position and direction refer to the intended use of the rotor, wherein "radial", "axial" and "circumferentially" refer to the axis of rotation. With respect to the flow of a working or heat transfer medium, "inner" means closer to the axis of rotation of the rotor, and "outer" means farther from the axis of rotation.

[0013] In a preferred embodiment, the main extension planes of the first and second rotor plates, i.e. the plate planes in which the first and second rotor plates each have the greatest extension, are each arranged substantially perpendicular to the axis of rotation. Preferably, the axis of rotation passes through the center of each of the first axis of rotation and the second axis of rotation. Furthermore, it is advantageous if, seen in the direction of the axis of rotation, the first and second rotor plates are arranged substantially congruently.

[0014] In a preferred embodiment, the first rotor plates each comprise at least one compression duct, at least one expansion duct and at least one first heat transfer duct for the working medium, and the plurality of second rotor plates each comprise at least one second heat transfer duct for the heat transfer medium.

[0015] In a preferred embodiment, the first rotor plates each comprise at least one flow duct for the working medium, wherein at least one flow duct comprises an inlet opening for the working medium at a first end and an outlet opening for the working medium at a second end. In a preferred embodiment, the flow duct comprises: a flow duct section preferably extending substantially radially outwards to form one of the compression ducts; and / or a flow duct section preferably extending substantially radially inwards to form one of the expansion ducts; and / or a flow duct section preferably extending substantially in the circumferential direction to form one of the first heat transfer ducts. Thus, the working medium can be distributed to the flow ducts in the first rotor plate through the inlet openings. The working medium then flows along the flow ducts to the outlet openings, where the working medium is conducted out of the rotor element. In the flow duct sections extending outwards, the working medium can be compressed by the effect of centrifugal acceleration when the rotor rotates. In the flow duct sections extending inwards, the working medium can also expand due to centrifugal forces. Heat can be transferred between the working medium and the heat transfer medium in a flow channel cross section, which extends substantially in the circumferential direction. The individual flow duct sections are connected together such that the working medium can flow through the flow duct in the first rotor plate from the inlet opening to the outlet opening.

[0016] In a preferred embodiment, the inlet opening and / or the outlet opening of the first rotor plate are aligned, ie along a line parallel to the rotation axis. Preferably, the inlet opening and / or the outlet opening are aligned when viewed in a direction parallel to the rotation axis.

[0017] In order to enable the working medium to pass through the second rotor plate, the second rotor plate in this embodiment preferably comprises a through-opening which is aligned with the inlet opening or aligned with the outlet opening. In this way, the working medium can be supplied on one side of the rotor element and distributed to the first rotor plate via the inlet opening and pass through the through-opening to the second rotor plate arranged therebetween.

[0018] In order to reduce the number of connections as much as possible, in a preferred embodiment, the outlet opening is arranged in a central region of the first rotor plate through which the rotation axis passes. Preferably, the rotation axis passes through the center of the outlet opening. The working medium can be guided along the flow duct to the outlet opening in the central region of the first rotor plate and discharged from the first rotor plate through the outlet opening, which are preferably aligned. Advantageously, several flow ducts of the first rotor plate can share the same outlet opening in the central region.

[0019] A fan is preferably provided to maintain the flow of the working medium. The fan is preferably arranged in the axial direction outside the rotor element consisting of the first rotor plate and the second rotor plate. The fan can be used to form a circulating flow of the working medium from the fan via the inlet opening through the flow duct in the rotor element, via the outlet opening back to the fan and finally back to the inlet opening in the flow duct in the rotor element. This allows the working medium to undergo a cyclic process. Depending on the arrangement of the flow duct in the first rotor plate, different types of cyclic processes can be realized, such as a Joule process with essentially isobaric heat transfer.

[0020] According to a particular embodiment, the fan may be connected to a fan drive, and the impeller of the fan may be set to rotate by the fan drive. The fan drive may be used to rotate the impeller relative to a rotor element, which is preferably set to rotate by a motor different from the fan drive.

[0021] In order to achieve a circulating flow of the working medium, the inlet opening of the first rotor plate can be connected to the outlet of the fan and / or the outlet opening of the first rotor plate can be connected to the inlet of the fan.

[0022] In order to improve the heat transfer between the working medium and the heat transfer medium, in a preferred embodiment, the first rotor plates each comprise a plurality of flow ducts, each flow duct having at least one flow duct section which preferably extends substantially radially outwards and / or having at least one flow duct section which preferably extends substantially radially inwards and / or having at least one flow duct section which preferably extends substantially in the circumferential direction. Thus, several flow ducts can be formed on the first rotor plate, through which the working medium can flow in parallel. The flow ducts can be distributed over the surface of the first rotor plate. Preferably, more than three, in particular more than six, for example twelve flow ducts are provided on each first rotor plate at different angular positions.

[0023] In a preferred embodiment, the flow ducts of the first rotor plate each include several flow duct sections, preferably extending substantially in the circumferential direction, which flow duct sections have different radial distances from the rotation axis to form several first heat transfer ducts. The flow duct sections extending in the circumferential direction are preferably arranged in loops. Preferably, several inner loops, such as S-shaped loops, are provided for heat exchange with the heat transfer medium in the inner loop of one of the second heat transfer ducts of one of the second rotor plates, and / or several outer loops, such as S-shaped loops, are provided for heat exchange with the heat transfer medium in the outer loop of one of the second heat transfer ducts of one of the second rotor plates. In this embodiment, intermediate compression or expansion can be achieved during heat exchange with the heat transfer medium. This allows the temperature to be increased again after the heat transfer, so as to transfer heat at a substantially constant temperature, or to improve efficiency in the case of applications where a small temperature difference between the inlet and the outlet of the heat transfer medium is required.

[0024] In order to reduce the required connections for the working medium, in a preferred embodiment, two adjacent flow ducts of the first rotor plate are arranged in mirror image with respect to a symmetry plane extending in the axial direction and in the radial direction, and the two adjacent flow ducts share a common inlet opening and a common outlet opening for the working medium. For example, if 12 flow ducts are provided at different angular positions per first rotor plate, then in this embodiment only six connections are required for the inlet for the working medium.

[0025] In a preferred embodiment, the second rotor plates each comprise at least one inner flow duct and at least one outer flow duct for forming one of the second heat transfer ducts, the outer flow duct being arranged radially further outwards than the inner flow duct. When used as a rotary heat pump, the outer flow duct can be designed as an external heat exchanger, in which a heat transfer medium (in this case a heat sink medium) absorbs heat from a working medium. The inner flow duct can be designed as an internal heat exchanger, in which a heat transfer medium (in this case a source medium) transfers heat to a working medium. Alternatively, the rotor can be designed as a heat engine.

[0026] In another embodiment, the first rotor plate comprises a second heat transfer duct for the heat transfer medium. In this embodiment, the second rotor plate can be formed as a separator plate of the first rotor plate, wherein the second separator plate preferably has no flow ducts for the working medium and the heat transfer medium.

[0027] For the integral formation of the individual flow ducts, it is advantageous if the compression duct, the expansion duct and the first heat transfer duct for the working medium are formed as indentations starting from the preferably substantially flat first outer surface of the first rotor plate, wherein the second heat transfer duct for the heat transfer medium is formed as

[0028] i. an indentation starting from the preferably substantially flat outer surface of the second rotor plate, or

[0029] ii. Indentations starting from the preferably substantially flat second outer surface of the first rotor plate. The first and second rotor plates preferably comprise substantially flat outer surfaces parallel to their main extension planes. In a first embodiment, the working medium flows in the indentations of the first rotor plate and the heat transfer medium flows in the indentations of the second rotor plate. By connecting the first and second rotor plates along the main extension surfaces of the first and second rotor plates, the indentations of the first rotor plate form a flow duct of closed cross section with the adjacent outer surface of the second rotor plate. In a second embodiment, the working medium and the heat transfer medium flow in separate indentations in the first rotor plate, respectively, which are formed on the opposite first and second outer surfaces of the first rotor plate. These indentations together with the adjacent outer surface of the second rotor plate form a flow duct of closed cross section for the working medium and the heat transfer medium.

[0030] In a preferred embodiment, the first rotor plate and the second rotor plate are connected to each other by diffusion connection, ie by diffusion bonding.

[0031] According to an embodiment, preferably at least 50, in particular at least 200, for example 300 to 800 first rotor plates and / or at least 50, in particular at least 200, for example 300 to 800 second rotor plates are provided. The first and / or second rotor plates may comprise a wall thickness, i.e. an extension perpendicular to the main extension plane or plate plane from one outer surface to the other outer surface, of 0.2 mm to 5 mm, in particular 0.5 mm to 4 mm, for example 2 mm to 3 mm. The flow duct may comprise a width, i.e. an extension transverse to the flow direction on the outer surface of the respective first or second rotor plate, of 0.5 mm to 5 mm, in particular 1 mm to 3 mm. The depth of the flow duct, i.e. its extension perpendicular to the main extension plane at the deepest point, may be 0.2 mm to 3 mm, in particular 1 mm to 2 mm.

[0032] In a first preferred embodiment variant, the first and second rotor plates are both circular in plan view, ie viewed in the axial direction. In this embodiment variant, the heat transfer surface can be optimized for a given length (ie axial extension) of the rotor element consisting of the first and second rotor plates.

[0033] In a second preferred embodiment, the first and second rotor plates are each non-circular, i.e. non-circular, in particular substantially rectangular when viewed in the direction of the rotation axis. This embodiment is advantageous when the rotor element is produced by diffusion bonding the first and second rotor plates, since a rectangular vacuum press can be used for diffusion bonding. Advantageously, the manufacturing process can be optimized in this way; moreover, a greater radial extension can be achieved.

[0034] For heat transfer between the working medium and the heat transfer medium, one of the first rotor plates and one of the second rotor plates are preferably arranged alternately. When the working medium is guided in the first rotor plate and the heat transfer medium is guided in the second rotor plate, the first heat transfer conduit of the first rotor plate and the second heat transfer conduit of the second rotor plate extend substantially at the same radial distance and in the same section in the circumferential direction, i.e., side by side. When the working medium and the heat transfer medium are guided in the first rotor plate, the first heat transfer conduit and the second heat transfer conduit extend substantially at the same radial distance and along the same section in the circumferential direction opposite to each other on the first rotor plate.

[0035] In a preferred embodiment, the first rotor plate and / or the second rotor plate each comprise at least one recess. On the one hand, this enables weight savings. Furthermore, thermal insulation can be achieved in areas where it is necessary to minimize undesired heat transfer. Thus, for example, the recess can form an insulating area between a compression channel and an expansion channel or between an external heat exchanger, in particular with a relatively high temperature, and an internal heat exchanger, in particular with a relatively low temperature.

[0036] In a preferred embodiment, the first and second rotor plates are made of a material selected from the group consisting of austenite, duplex steel, copper, titanium and aluminum.

[0037] The invention also relates to a method for heat transfer between a working medium (especially a rare gas) and a heat transfer medium (especially a liquid), comprising the following steps:

[0038] Providing the rotor in the above embodiment,

[0039] The working medium is fed into the rotor.

[0040] Feeding the heat transfer medium into the rotor, and

[0041] The rotor is caused to rotate about the rotation axis.

[0042] The method according to the invention for manufacturing a rotor, in particular a rotary heat pump, comprises at least the following steps:

[0043] providing a first rotor plate,

[0044] providing a second rotor plate,

[0045] A compression conduit, an expansion conduit, a first heat transfer conduit for a working medium and a second heat transfer conduit for a heat transfer medium are formed in the first and / or second rotor plate,

[0046] stacking the first and second rotor plates,

[0047] connecting the first rotor plate to the second rotor plate along a main extension plane of the first rotor plate and the second rotor plate, and

[0048] A rotor element formed by the first and second rotor plates is rotatably mounted about a rotation axis.

[0049] If flow ducts for a working medium are to be formed in the first rotor plate and second heat transfer ducts for a heat transfer medium are to be formed in the second rotor plate, the method for producing a rotor, in particular a rotary heat pump, preferably comprises at least the following steps:

[0050] providing a first rotor plate,

[0051] providing a second rotor plate,

[0052] A compression duct, an expansion duct and a first heat transfer duct for a working medium are formed in the first rotor plate,

[0053] forming a second heat transfer conduit for a heat transfer medium in the second rotor plate,

[0054] stacking the first and second rotor plates,

[0055] connecting the first rotor plate to the second rotor plate along a main extension plane of the first rotor plate and the second rotor plate, and

[0056] A rotor element formed by the first and second rotor plates is rotatably mounted about a rotation axis.

[0057] If flow ducts for the working medium and second heat transfer ducts for the heat transfer medium are to be formed in the first rotor plate, the method for producing a rotor, in particular a rotary heat pump, preferably comprises at least the following steps:

[0058] providing a first rotor plate,

[0059] providing a second rotor plate,

[0060] A compression duct, an expansion duct and a first heat transfer duct for the working medium are formed in the first rotor plate, preferably as indentations in a first outer surface of the first rotor plate,

[0061] forming a second heat transfer conduit for a heat transfer medium in the first rotor plate, preferably as an indentation in a second outer surface of the first rotor plate,

[0062] stacking the first and second rotor plates,

[0063] connecting the first rotor plate to the second rotor plate along a main extension plane of the first rotor plate and the second rotor plate, and

[0064] A rotor element formed by the first and second rotor plates is rotatably mounted about a rotation axis.

[0065] In a preferred embodiment, the first rotor plate and the second rotor plate are joined together by diffusion bonding, in particular in a vacuum press.

[0066] The compression duct, the expansion duct, the first heat transfer duct and / or the second heat transfer duct are preferably formed by etching or milling in the first and / or second rotor plate.

[0067] The design of the rotor element comprising the first and second rotor plates enables the application of high pressures. In a preferred embodiment, the maximum pressure of the working medium in the first rotor plate in the rotating state of the rotor is at least 80 bar, in particular at least 120 bar, for example from 160 bar to 240 bar. Advantageously, these pressures lead to lower pressure losses for the same mass flow, thereby leading to higher efficiency, which is determined using the coefficient of performance (COP) when the rotor is designed as a heat pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0069] Figure 1 A rotor according to the invention is shown for use as a rotary heat pump.

[0070] Figure 2A , Figure 2B and Figure 3 Shown by Figure 1 A view of a rotor element formed by first and second rotor plates of a rotary heat pump is shown.

[0071] Figures 4 to 9 A further exemplary embodiment of components of a rotor element is shown in each case.

[0072] Fig. 10A A first rectangular embodiment is shown, Fig. 10B and Fig. 10C A second rectangular embodiment is shown.

[0073] Fig.11 and Fig.12 A further embodiment of a rotor element is shown, in which the working medium and the heat transfer medium are conducted in microchannels of the first and second rotor plates, respectively.

[0074] Fig.13 and Fig.14 A further embodiment of a rotor element is shown, in which the working medium and the heat transfer medium are conducted in ducts of first rotor plates, the second rotor plates being arranged as separator plates between the first rotor plates. DETAILED DESCRIPTION

[0075] Figure 1A rotor 1 is shown, which in the illustrated version is designed as a device for converting mechanical energy into thermal energy (or vice versa). The rotor 1 is used in particular as a rotary heat pump. According to an embodiment, the rotor 1 can be accommodated in a stationary housing at a pressure below atmospheric pressure. The rotor 1 comprises a rotary axis 2, preferably horizontal in the operating state, about which the rotor 1 rotates with the help of an electric motor 37. To form the rotary axis 2, the rotor 1 comprises two rotary bearings 3. The rotor 1 comprises a rotor element 4, which is arranged at a position 500 m above the rotor 1. Figure 1 The rotor element 4 is only symbolically shown in FIG. 1 , which is connected on one side to a connection 5 for a heat transfer medium, in particular water, and on the other side to a connection 6 for a working medium, for example a rare gas. In addition, a fan 7 is provided to maintain a circulating flow of the working medium. The fan 7 is connected to a fan drive 8 so that the impeller of the fan 7 rotates relative to the rotor element 4 set in rotation by the motor 37. In addition, Figure 1 The rotary feed-through 9 for the (water) connection 5 can be seen.

[0076] Figure 2A , Figure 2B and Figure 3 Schematically, an embodiment of a rotor element 4 is shown, which consists of a plurality of first rotor plates 10 and second rotor plates 11. For the sake of clarity, only two first rotor plates 10 and two second rotor plates 11 are shown in FIG. Figure 3 , the flow of the working medium is indicated by solid lines and the flow of the heat transfer medium is indicated by dotted lines. The first rotor plate 10 and the second rotor plate 11 are connected to each other on their outer surfaces which are parallel to their main extension planes or plate planes (which are vertically aligned in operation). Seen in the axial direction, the first rotor plates 10 and the second rotor plates 11 are arranged alternately. In this embodiment, the first rotor plates 10 each include a number of flow ducts 12, through which the working medium flows. The working medium flows into the inlet opening 13 into the initial section of the flow duct 12 and flows out of the terminal section of the flow duct 12 through the outlet opening 14. In the embodiment shown, each inlet opening 13 is provided with a number of adjacent flow ducts 12 extending parallel to each other, see Figure 2B in Figure 2ADetail B highlighted by a circle in FIG. The inlet opening 13 is connected to the outlet of the fan 7. The outlet opening 14 is connected to the inlet of the fan 7. In the example shown, the outlet opening 14 is arranged in a central region of the first rotor plate 10, through which the rotating shaft 2 passes. In order to form a compression duct 15, the flow duct 12 comprises a flow duct section 16 extending substantially radially outwards, in which the working medium is guided away from the rotating shaft 2 to increase the pressure caused by centrifugal acceleration. The flow duct section 16 extending substantially radially outwards is connected to at least one flow duct section 17 extending substantially in the circumferential direction, by which a first heat transfer duct 18 is formed for heat exchange with the heat transfer medium. The circumferential flow duct section 17 is connected to a flow duct section 19 extending substantially radially inwards, which serves as an expansion duct 20 to reduce the pressure of the working medium caused by centrifugal acceleration. The flow duct section 19 extending substantially radially inward is connected to at least one other flow duct section 21 extending substantially in the circumferential direction, which is designed as another first heat transfer duct 18 for heat exchange with a heat transfer medium. The inlet opening 13 and the outlet opening 14 of the first rotor plate 10 are respectively aligned, and the second rotor plate 11 comprises corresponding through openings 32 for the working medium to pass through.

[0077] In this embodiment, the second rotor plates 11 each include a second heat transfer conduit 22 through which the heat transfer medium flows. The second rotor plates 11 each include at least one inner flow conduit 23 and at least one outer flow conduit 25 as the second heat transfer conduit 22, the inner flow conduit 23 having at least one section 24 extending in the circumferential direction to form an inner heat exchanger, and the outer flow conduit 25 having a section 26 extending in the circumferential direction to form an outer heat exchanger. From a radial direction, the outer flow conduit 25 is arranged further outward than the inner flow conduit 23. The circumferentially extending section 24 of the inner flow conduit of the second rotor plate 11 extends adjacent to the circumferentially extending flow conduit section 21 of the first rotor plate 10. The circumferentially extending section 26 of the outer flow conduit of the second rotor plate 11 extends adjacent to the circumferentially extending flow conduit section 17 of the first rotor plate 10. The inner flow conduit 23 of the second rotor plate 11 includes an inlet opening 27 for the heat transfer medium to enter and an outlet opening 28 for the heat transfer medium to leave. Correspondingly, the outer flow duct 25 comprises a further inlet opening 29 for the heat transfer medium to enter and a further outlet opening 30 for the heat transfer medium to leave. The inlet opening 27, the outlet opening 28, the further inlet opening 29 and the further outlet opening 30 are respectively aligned. The first rotor plate 10 comprises a corresponding feed-through opening 31 for the heat transfer medium to pass through.

[0078] exist Figure 2A , Figure 2B and Figure 3In the embodiment shown, the first rotor plate 10 and the second rotor plate 11 are circular in the viewing direction of the rotation axis 2. Each first rotor plate 10 comprises a number of, for example, 12, flow ducts 12, which are formed in the same way and distributed at different angular positions on the first rotor plate 10. As described above, a plurality of flow ducts 12 can also be provided at each angular position, which extend side by side from the inlet opening 13 to the outlet opening 14. In the embodiment shown, the flow duct 12 comprises a plurality of flow duct sections 21 extending in the circumferential direction in the radially inner region of the first rotor plate 10 and a plurality of flow duct sections 17 extending in the circumferential direction in the radially outer region of the first rotor plate 10, which are respectively arranged in a loop with different radii R1, R2, R3 relative to the rotation axis 2. Thus, the second rotor plate 11 comprises a plurality of, for example, 12, inner flow ducts 23 and a plurality of, for example, 12, outer flow ducts 24. In the illustrated embodiment, the inner flow duct 23 of the second rotor plate 11 comprises a plurality of circumferentially extending sections 24 as inner heat exchangers and a plurality of circumferentially extending sections 26 as outer heat exchangers, which extend adjacent to the circumferentially extending flow duct section 21 in the radially inner region of the first rotor plate 10 or adjacent to the circumferentially extending flow duct section 17 in the radially outer region of the first rotor plate 10. Figure 2A , Figure 2B and Figure 3 In an embodiment, the working medium is compressed or expanded during the heat transfer process.

[0079] Figure 4 Another embodiment is shown, taking one of the first rotor plates 10 as an example, in which two adjacent flow ducts 12 are arranged in a mirror image with respect to a symmetry plane S extending in the axial direction and in the radial direction. The two adjacent flow ducts 12 each share a common inlet opening 13 and a common outlet opening 14 for the working medium. In this embodiment, the flow ducts of the second rotor plate 11 extend in line with the flow ducts 12 of the first rotor plate 10 in the region of the heat transfer ducts, and preferably in a countercurrent manner.

[0080] Figure 5 , Figure 6 and Figure 7 Another embodiment is shown in each case, in which the working medium is compressed or expanded during the heat transfer process.

[0081] according to Figure 5 The working medium is compressed during the external heat transfer, preferably in order to achieve a low temperature difference between the working medium and the heat transfer medium on the radiator side at a low diffusivity or a substantially constant temperature of the heat transfer medium on the radiator side.

[0082] Furthermore, the working medium expands during the internal heat transfer process in order to achieve a low temperature difference between the working medium and the heat transfer medium on the source side at low diffusion or substantially constant temperature of the heat transfer medium on the source side. The low temperature difference between the working medium and the corresponding heat transfer medium leads to low energy losses and high efficiency (COP) of the entire system. A prerequisite is that the corresponding heat transfer medium is fed through the pipe with the working medium using the counterflow principle.

[0083] according to Figure 6 , the working medium is compressed during the external heat transfer, preferably in order to achieve a low temperature difference between the working medium and the heat transfer medium on the radiator side at a low diffusivity or when the temperature of the heat transfer medium on the radiator side is essentially constant.

[0084] Furthermore, the working medium is also compressed during the internal heat transfer process in order to achieve a low temperature difference between the working medium and the heat transfer medium on the source side when the heat transfer medium on the source side has a high diffusivity. The respective heat transfer medium and working medium are guided through the pipe using the counterflow principle.

[0085] according to Figure 7 , the working medium expands during the external heat transfer process so as to achieve a low temperature difference between the working medium and the heat transfer medium on the radiator side when the heat transfer medium on the radiator side has a high diffusivity.

[0086] Furthermore, the working medium is compressed during the internal heat transfer process in order to achieve a low temperature difference between the working medium and the heat transfer medium on the source side when the heat transfer medium on the source side has a high diffusivity. The respective heat transfer medium and working medium are guided through the pipe using the counterflow principle.

[0087] Figure 8 Another embodiment is shown in which no intermediate compression or intermediate expansion of the working medium occurs. For this purpose, in the radially inner region of the first rotor plate 10, the working medium flows only through one flow duct section 21 extending in the circumferential direction in each flow duct 12, i.e., not as Figure 2A , Figure 2B and Figure 3 Accordingly, in the radially outer region of the first rotor plate 10, the working medium flows through only one flow duct section 17 extending in the circumferential direction in each flow duct 12, i.e., not as shown in FIG. Figure 2A , Figure 2B and Figure 3 Several flow duct sections 17 are shown connected to one another in a loop.

[0088] Fig. 9Another embodiment is shown, in which the first rotor plate 10 and / or the second rotor plate 11 each comprises at least one recess 33. The recesses 33 can be arranged such that the heat transfer between the working medium flows in the flow ducts 12 at different angular positions of the respective first rotor plate 10 is reduced, in particular substantially suppressed. Furthermore, the recesses 33 can be used to reduce, in particular substantially suppress, the heat transfer of the heat transfer medium in the flow ducts of the second rotor plate 11 at adjacent ducts. Furthermore, the recesses 33 can be arranged such that the heat transfer between the working medium and the heat transfer medium can substantially only occur at the locations where the heat transfer is required.

[0089] Fig. 10A A first embodiment is shown, in which the first rotor plate 10 and the second rotor plate 11 are not circular, but are here substantially rectangular when viewed in the direction of the rotation axis 2. In the embodiment shown, the two shorter sides of the first rotor plate 10 or the second rotor plate 11 are formed in a curved manner, while the two longer sides of the first rotor plate 10 or the second rotor plate 11 are formed in a straight manner.

[0090] Fig. 10B and Fig. 10C Another substantially rectangular embodiment of the rotor element is shown. Fig. 10B In FIG. 1 , one of the first rotor plates 10 is shown, wherein the ducts of the adjacent second rotor plate 11 are drawn with dashed lines. Fig. 10C A second rotor plate 11 is shown. This embodiment differs from the above-described embodiment in the following ways.

[0091] from Fig. 10B It can be seen that in this embodiment the first rotor plate 10 comprises a plurality of flow ducts 12 for the working medium, preferably extending between 10 and 200, preferably substantially parallel, which extend between an inlet opening 13 and at least one outlet opening 14, here a common outlet opening 14. For the sake of clarity, Fig. 10BIt is shown that there are seven flow ducts 12 in each quarter of the first rotor plate 10, i.e., a total of 28 flow ducts 12. The flow ducts 12 each include one of the compression ducts 15 extending outwardly away from the rotating shaft 2, an outer duct of the first heat transfer duct 18, an expansion duct 20, and an inner duct of the first heat transfer duct 18. The first heat transfer ducts 18 for forming the external heat exchanger and the first heat transfer ducts 18 for forming the internal heat exchanger are each arranged at a different distance from the rotating shaft 2. The first heat transfer ducts 18 on the outside are each connected to the corresponding first heat transfer ducts 18 on the inside, so that the distance difference from the rotating shaft 2 is substantially the same. Thus, for example, the innermost duct extending substantially in the circumferential direction of the parallel first heat transfer ducts 18 of the internal heat exchanger is also connected to the innermost duct extending substantially in the circumferential direction of the parallel first heat transfer ducts 18 of the external heat exchanger. The two radii of the connected inner heat transfer ducts 18 and outer heat transfer ducts 18 are designed so that the temperature difference between the inner heat transfer ducts and the outer heat transfer ducts in all parallel ducts is substantially the same. This makes the temperature profiles in all parallel heat transfer pipes essentially the same and the heat transfer performance constant, thus keeping energy losses low and preventing preferential flow due to increased or decreased pressure differences.

[0092] In addition, Fig. 10B , Fig. 10C In the embodiment of , the working medium flows in the heat transfer region transversely to the heat transfer medium, so that lower temperature differences (and thus lower energy losses) still occur. Fig. 10A In this, it is shown that using external heat transfer, a constant temperature is established in each of the parallel pipes by compressing the working medium in this pipe during the heat exchange. The temperature distribution of the cross-flowing heat transfer medium in the heat transfer area can be set by the number and radius difference of the parallel pipes. Due to the large number of parallel pipes (with the same radial extension as in the above-mentioned design with loops) and the relatively short pipe lengths, the pressure losses are reduced compared to other designs. The same effect can be achieved in the internal heat transfer area if each of the parallel inner pipes expands during the heat exchange with the heat transfer medium by reducing the radius in the flow direction in order to keep the temperature in the pipe constant.

[0093] exist Fig.11 and Fig.12 In more detail, the Figure 2A , Figure 2B and Figure 3A portion of the rotor element 4 of the embodiment of the present invention. Thus, several (in the example shown, six) substantially circumferential flow duct sections 21 in the radially inner region of the first rotor plate 10, substantially circumferential flow duct sections 17 in the radially outer region of the first rotor plate 10, substantially circumferential inner heat exchanger sections 24 and substantially circumferential outer heat exchanger sections 26 of the second rotor plate 11 extend adjacent to one another. In addition, Fig. 9 10 , the end plate 34 can be seen without the ducts.

[0094] like Fig.11 and Fig.12 As shown, the flow duct 12 of the first rotor plate 10 and the second heat transfer duct 22 of the second rotor plate 11 are respectively formed as indentations 35, which are respectively recessed relative to the flat outer surface or bonding surface 36 of the first rotor plate 10 and the second rotor plate 11. Closed ducts for the working medium and the heat transfer medium are formed by stacking the first rotor plate 10 and the second rotor plate 11. The first rotor plate 10 and the second rotor plate 11 can be connected to each other by diffusion connection. These connections are described, for example, in EP3885691.

[0095] exist Fig.13 and Fig.14 In the detailed view of Fig.13 ), another embodiment of the rotor is shown, wherein only the differences from the previous embodiment are discussed below. Fig.13 and Fig.14 In the embodiment of the present invention, the first rotor plate 10 includes not only the compression duct 15, the expansion duct 20 and the first heat transfer duct 18 for the working medium, but also the second heat transfer duct 22 for the heat transfer medium. To this end, the first rotor plate 10 includes indentations 35 for forming the compression duct 15, the expansion duct 20 and the first heat transfer duct 18 for the working medium on its first outer surface 36A, and indentations 35 for forming the second heat transfer duct 22 for the heat transfer medium on its second outer surface 36B. The second rotor plate 11 is arranged between the first rotor plates 10 as a partition plate without indentations 35 so as to close the indentations 35 of the first rotor plate 10, thereby forming the flow duct 12 and the second heat transfer duct 22.

[0096] Reference numerals list:

[0097] 1 rotor

[0098] 2 Rotation Axis

[0099] 3Swivel bearing

[0100] 4 Rotor elements

[0101] 5. Water connection

[0102] 6 Gas connection

[0103] 7 Fan

[0104] 8 Fan Driver

[0105] 9 Rotary Feedthrough

[0106] 10First rotor plate

[0107] 11 Second rotor plate

[0108] 12 Flow channel of the first rotor plate 10

[0109] 13 Inlet opening of flow duct 12

[0110] 14 outlet opening of flow duct 12

[0111] 15. Compression Pipe

[0112] 16 Flow duct section extending radially outward

[0113] 17 Circumferentially extending flow duct section

[0114] 18. First heat transfer pipe

[0115] 19 Flow duct section extending radially inward

[0116] 20Expansion pipe

[0117] 21 Circumferentially extending flow duct section

[0118] 22 Second heat transfer pipe

[0119] 23 Inner flow channel of the second rotor plate 11

[0120] 24 Circumferentially extending section of the inner flow duct 23

[0121] 25 External flow channel of the second rotor plate 11

[0122] 26 Circumferentially extending section of the outer flow conduit 25

[0123] 27 entrance openings

[0124] 28 exit openings

[0125] 29 Additional entrance openings

[0126] 30 additional exit openings

[0127] 31 Feedthrough opening of the first rotor plate 10

[0128] 32 through opening of the second rotor plate 11

[0129] 33 concavity

[0130] 34 End Plate

[0131] 35 Dents

[0132] 36 External or bonded surfaces

[0133] 37 Motor

Claims

1. A rotor (1), in particular a rotary heat pump, comprising: Axis of rotation (2), a plurality of compression ducts (15) in which a working medium, in particular a gas, preferably a noble gas, is led away from the rotating shaft (2) in order to increase the pressure caused by centrifugal acceleration, a plurality of expansion ducts (20) in which the working medium is guided towards the rotating shaft (2) in order to reduce the pressure caused by centrifugal acceleration, a plurality of first heat transfer conduits (18) for the working medium, and a plurality of second heat transfer conduits (22) for a heat transfer medium, in particular a liquid, so that heat is transferred between the working medium flowing in the first heat transfer conduits (18) and the heat transfer medium flowing in the second heat transfer conduits (22), It is characterized in that A plurality of first rotor plates (10) and second rotor plates (11), comprising the compression pipe (15), the expansion pipe (20), the first heat transfer pipe (18) for the working medium and the second heat transfer pipe (22) for the heat transfer medium, The first rotor plate (10) and the second rotor plate (11) are connected to each other along their main extension planes.

2. The rotor (1) according to claim 1, characterized in that The plurality of first rotor plates (10) each include at least one compression conduit (15), at least one expansion conduit (20) and at least one first heat transfer conduit (18) for the working medium, Each of the plurality of second rotor plates (11) comprises at least one second heat transfer conduit (22) for the heat transfer medium.

3. The rotor (1) according to claim 2, characterized in that The first rotor plates (10) each include at least one flow duct (12), The flow duct (12) has a flow duct section (16) which preferably extends substantially radially outwards to form one of the compression ducts (15), and / or The flow duct (12) has a flow duct section (19) which preferably extends substantially radially inwards to form one of the expansion ducts (20), and / or The flow duct (12) has a flow duct section (17, 21) which preferably extends substantially circumferentially to form one of the first heat transfer ducts (18), The at least one flow duct (12) comprises an inlet opening (13) for the working medium at a first end and an outlet opening (14) for the working medium at a second end.

4. The rotor (1) according to one of claims 1 to 3, characterized in that A fan (7) is provided for maintaining the flow of the working medium, and the inlet opening (13) is preferably connected to an outlet of the fan (7) and / or the outlet opening (14) is connected to an inlet of the fan (7).

5. The rotor (1) according to one of claims 2 to 4, characterized in that The first rotor plates (10) each comprise a plurality of flow ducts (12), each flow duct having at least one flow duct section (16) which preferably extends substantially radially outwards, and / or having at least one flow duct section (19) which preferably extends substantially radially inwards, and / or having at least one flow duct section (17, 21) which preferably extends substantially in the circumferential direction.

6. The rotor (1) according to claim 5, characterized in that The flow ducts (12) of the first rotor plate (10) each include a plurality of flow duct sections (17, 21) preferably extending substantially in the circumferential direction, and the radial distances of the flow duct sections (17, 21) from the rotating shaft (2) are different to form a plurality of first heat transfer ducts (10).

7. The rotor (1) according to claim 5 or 6, characterized in that Two adjacent flow ducts (12) of the first rotor plate (10) are arranged in a mirror image with respect to a symmetry plane extending in the axial direction and the radial direction, and the two adjacent flow ducts (12) share a common inlet opening (13) and a common outlet opening (14) for the working medium.

8. The rotor (1) according to one of claims 1 to 7, characterized in that The second rotor plates (11) each include at least one inner flow conduit (23) and at least one outer flow conduit (25), each inner flow conduit (23) and outer flow conduit (25) being used to form one of the second heat transfer conduits (22), the outer flow conduit (25) being arranged further outward in a radial direction than the inner flow conduit (23).

9. The rotor (1) according to one of claims 1 to 7, characterized in that The first rotor plate (10) comprises the second heat transfer conduit (22) for the heat transfer medium.

10. The rotor (1) according to one of claims 1 to 9, characterized in that The compression duct (15), the expansion duct (20) and the first heat transfer duct (18) for the working medium are formed as indentations (35) starting from a first, preferably substantially flat, outer surface (36A) of the first rotor plate (10), while the second heat transfer duct (22) for the heat transfer medium is formed as i. an indentation (35) starting from the preferably substantially flat outer surface (36) of the second rotor plate (11), or ii. An indentation (35) starting from a second, preferably substantially flat, outer surface (36B) of said first rotor plate (10).

11. The rotor (1) according to one of claims 1 to 10, characterized in that The first rotor plate (10) and the second rotor plate (11) are connected to each other via diffusion bonding.

12. The rotor (1) according to one of claims 1 to 11, characterized in that The first rotor plate (10) and the second rotor plate (11) are each substantially circular or non-circular, in particular substantially rectangular.

13. A method for manufacturing a rotor (1), in particular a rotary heat pump, comprising the following steps: providing a first rotor plate (10), providing a second rotor plate (11), A compression pipe (15), an expansion pipe (20), a first heat transfer pipe (18) for a working medium and a second heat transfer pipe (22) for a heat transfer medium are formed in the first rotor plate (10) and / or the second rotor plate (11), stacking the first rotor plate (10) and the second rotor plate (11), connecting the first rotor plate (10) to the second rotor plate (11) along a main extension plane of the first rotor plate (10) and the second rotor plate (11), and A rotor element (4) formed by the first rotor plate (10) and the second rotor plate (11) is rotatably mounted about a rotation axis (2).

14. The method according to claim 13, characterized in that The first rotor plate (10) and the second rotor plate (11) are connected together by diffusion bonding.

15. The method according to claim 13 or 14, characterized in that The compression duct (15), the expansion duct (20), the first heat transfer duct (18) and / or the second heat transfer duct (22) are preferably formed by etching or milling in the first rotor plate and / or the second rotor plate (11).

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