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EP-4735820-A1 - INFLOW REGION FOR A TECHNICAL DEVICE, IN PARTICULAR FOR A HEAT ACCUMULATOR, AND HEAT ACCUMULATOR

EP4735820A1EP 4735820 A1EP4735820 A1EP 4735820A1EP-4735820-A1

Abstract

The invention relates to an inflow region (14) for a technical device (10), in particular for a heat accumulator, wherein flow-deflection elements (16) are located in the inflow region (14) for deflecting a gaseous medium flowing through the inflow region (14) into a region of the technical device through which the medium is supposed to flow. The inflow region (14) is designed in such a way that the medium flowing into the inflow region (14) in an inflow direction (18) is deflected in the inflow region (14), by means of the flow-deflection elements (16), in the direction of the region (12) through which the medium is supposed to flow.

Inventors

  • Müller, Lukas
  • SCHICHTEL, Dr. Martin

Assignees

  • Kraftblock GmbH

Dates

Publication Date
20260506
Application Date
20240614

Claims (15)

  1. 1. Inflow region (14) for a technical device (10), in particular for a heat accumulator, wherein flow deflection elements (16) are arranged in the inflow region (14) for deflecting a gaseous medium flowing through the inflow region (14) into a region of the technical device through which flow is to be carried, wherein the inflow region (14) is designed such that the medium flowing into the inflow region (14) along an inflow direction (18) is deflected in the inflow region (14) by means of the flow deflection elements (16) in the direction of the region through which flow is to be carried (12).
  2. 2. Inflow region (14) according to claim 1, characterized in that the flow deflection elements (16) are designed flat and are arranged one behind the other in the inflow direction (18).
  3. 3. Inflow region (14) according to claim 1 and 2, characterized in that the flow deflection elements (16) are designed and arranged such that they form a lamellar structure.
  4. 4. Inflow region (14) according to one of the preceding claims, characterized in that the inflow cross-section (22) through which the medium flows into the inflow region (14) is smaller than the transition cross-section (24) through which the medium flows at the transition from the inflow region (14) to the region to be flowed through (12).
  5. 5. Inflow region (14) according to one of the preceding claims, characterized in that the heat accumulator (10) is designed such that the medium is deflected by an angle of at least approximately 90° and/or the angle between the inflow direction (18) and the flow direction (20) of the medium in the region to be flowed through (12) is at least approximately 90°. CORRECTED SHEET (RULE 91) ISA/EP
  6. 6. Inflow region (14) according to one of the preceding claims, characterized in that the flow deflection elements (16) have a profile, in particular a wing-like profile, for generating and/or supporting a Bernoulli effect when deflecting the medium.
  7. 7. Inflow region (14) according to one of the preceding claims, characterized in that the flow deflection elements (16) each have an edge against which the medium flows and the edges of the flow deflection elements (16) against which the medium flows are rounded.
  8. 8. Inflow region (14) according to one of the preceding claims, characterized in that the flow deflection elements (16) are adjustable for controlling the deflection of the medium.
  9. 9. Inflow region (14) according to one of the preceding claims, characterized in that the adjustable design of the flow deflection elements (16) is realized by the adjustability of a partial region of the respective flow deflection element (16) comprising the edge of the respective flow deflection element (16) against which the flow occurs.
  10. 10. Inflow region (14) according to one of the preceding claims, characterized in that a plurality of flow deflection elements (16) are arranged one behind the other in the direction perpendicular to the inflow direction (18) and the flow direction (20) of the medium in the region to be flowed through (12), in particular within a lamella (26) of the lamella-like structure, in particular wherein support structures (28) for mechanically supporting the flow deflection elements (16) are arranged between the adjacent flow deflection elements (16).
  11. 11. Inflow region (14) according to one of the preceding claims, characterized in that the in adjacent lamellae (26) of the lamellar CORRECTED SHEET (RULE 91) ISA/EP structure in the direction perpendicular to the inflow direction (18) and the flow direction (20) of the medium in the region to be flowed through (12) the flow deflection elements (16) arranged one behind the other are arranged offset from one another.
  12. 12. Inflow region (14) according to one of the preceding claims, characterized in that the flow deflection elements (16) have heating elements for heating the medium and/or are designed as heat exchangers in order to exchange thermal energy between the medium and another heat transfer medium.
  13. 13. Inflow region (14) according to one of the preceding claims, characterized in that a granular and/or free-flowing material, in particular a heat storage material, is accommodated in the region through which the flow is to take place and the flow deflection elements (16) exert a mechanical retention function on the material.
  14. 14. Inflow region (14) according to one of the preceding claims, characterized in that the inflow region (18) and the region to be flowed through (12) are arranged within a common pressure vessel (32).
  15. 15. Heat accumulator (10) with an inflow region (14) according to one of the preceding claims, wherein the medium flowing through the inflow region (14) into the region to be flowed through (12) is a heat transfer medium, wherein the region to be flowed through (12) is a heat storage region in which a material through which the heat transfer medium can flow is accommodated in the form of a heat storage material. CORRECTED SHEET (RULE 91) ISA/EP

Description

Inflow area for a technical device, in particular for a heat storage and heat storage Description The invention relates to an inflow region for a technical device, in particular for a heat accumulator, and a heat accumulator. Inflow areas of the type in question serve to guide a gaseous medium into an area through which the medium is to flow. The inflow area and the area through which the medium is to flow are part of a technical facility, in particular a technical facility from the field of chemical process engineering and/or thermal process engineering. The task of the inflow area is not only to guide the medium to the area through which the flow is to be carried, but often also to ensure, in particular by means of suitable flow guidance, that flow conditions are established before the medium enters the area through which the flow is to be carried, which, according to the respective purpose of the technical device, are suitable for the flow of the medium through the area through which the flow is to be carried. In particular, the technical device is a heat storage device. Heat storage devices of the type in question serve to store heat. This is done by a gaseous medium, which in the case of a heat storage device is a heat transfer medium, releasing heat to a heat storage material when the heat storage device is charged. When the heat storage device is discharged, the heat storage material in turn releases heat energy to the gaseous heat transfer medium. The heat transfer medium can thus Remove heat energy from the heat storage device or supply it to the heat storage device, depending on whether the heat transfer medium has a higher or lower temperature than the heat storage material. In order to enable heat transfer between the heat transfer medium and the heat storage material in practice, a heat storage area through which the gaseous heat transfer medium can flow has a heat storage area through which the heat transfer medium can flow. The heat storage material through which the heat transfer medium can flow is arranged in this heat storage area. The heat transfer therefore takes place when the heat storage material flows through. In practice, the heat storage material has a significant flow resistance with regard to the flow of the heat transfer medium. The heat transfer medium is usually supplied to the heat storage via pipes. In these, the heat transfer medium has a comparatively high flow velocity. Allowing such a supply line to end directly in or on the heat storage material would result in the heat transfer medium flowing into the heat storage material at a high speed through a comparatively small cross-section. The heat transfer medium flow would then hit the high flow resistance of the heat storage material directly at a comparatively high flow velocity. This would lead to unfavorable conditions in terms of flow technology. In addition, the comparatively selective introduction of the heat transfer medium would lead to an uneven distribution and spread of the heat transfer medium in the heat storage material and thus to an inefficient flow through the heat storage material. In practice, heat storage units have been developed that have an inflow area that, like a diffuser, dams up the heat transfer medium flow fed to the heat storage unit. Such an inflow area has a widening in the direction of flow cross-section. The expansion of the cross-section reduces the speed of the flowing heat medium and increases its static pressure. At the end of the inflow area, the heat transfer medium can also flow into the heat storage area and thus into the heat storage material via a comparatively large cross-section. The cross-section of the transition between the inflow area and the heat storage area corresponds in particular to the cross-section that the heat storage area then maintains constant in the direction of flow. In this way, a very even flow through the heat storage area is made possible. However, the inflow areas known from the prior art are disadvantageous in many respects, particularly as a component of heat storage systems. The typical widening of such an inflow area, which is required for effective damming of the flow, is approximately 8-10°, which means that such an inflow area has a considerable length in the direction of flow. However, the inflow area itself does not contain any heat storage material, which is why the resulting high space requirement of the inflow area in the direction of flow disadvantageously enlarges the entire heat storage system. Heat storage units with corresponding inflow areas are known from the state of the art in the form of, for example, WO 2015/106815 A1, EP 2 902 740 A1 or WO 2016/156054 A1. However, these all have either the considerable lengths that result from the small expansion angle, or they have significantly larger expansion angles and therefore a significantly smaller space requirement, which, however, has a very negative effect on the flow conditions insi