WO2017076874A1

WO2017076874A1 - Heat store

Info

Publication number: WO2017076874A1
Application number: PCT/EP2016/076376
Authority: WO
Inventors: Florian Surrey; Johannes Lang
Original assignee: Robert Bosch Gmbh
Priority date: 2015-11-04
Filing date: 2016-11-02
Publication date: 2017-05-11
Also published as: DE102015221562A1

Abstract

The invention relates to a heat store for a climate-control device and/or for a fresh water supply, having a container and thermal insulation, wherein the container delimits at least part of an internal space, wherein a storage medium can be arranged in the internal space, wherein the thermal insulation is arranged on a first external jacket surface of the container in order to thermally insulate the container with respect to its surroundings, wherein the thermal insulation has an inner jacket surface and a second, outer jacket surface, wherein the inner jacket surface has, with respect to the second, outer jacket surface, a different shape in cross section perpendicular to a gravitational direction.

Description

Description title

heat storage

The invention relates to a heat accumulator according to claim 1. Advantageous embodiments are given in the dependent claims.

From DE 20 2013 105 924 111 a storage container made of thermoplastic material for a liquid medium is known, wherein the storage container has a fiber reinforcement, wherein the storage container comprises a foot part, a central part, a head part and at least one terminal, wherein the terminal arranged in the middle part is.

It is an object of the invention to provide an improved heat storage.

This object is achieved by means of a heat accumulator according to claim 1. Advantageous embodiments are given in the dependent claims.

The heat accumulator is designed for an air conditioning device and / or for a hot water supply and has a container and a thermal insulation. The container limits at least in sections an interior. In the interior of a storage medium can be arranged, wherein on a first outer surface of the container, the thermal insulation is arranged to thermally isolate the container from an environment, the heat insulation having an inner circumferential surface and a second outer circumferential surface, wherein the inner circumferential surface of the second outer lateral surface in a cross section perpendicular to a direction of gravity has a different shape. This embodiment has the advantage that the heat accumulator can be transported with fully assembled thermal insulation directly to the plant. Furthermore, in this way, the second outer lateral surface can be optimally adapted to the maximum passage width and at the same time a particularly high storage volume of the interior for storing the storage medium can be provided.

In a further embodiment, the inner circumferential surface lies against the first outer lateral surface at least in sections and are preferably connected to one another in a material-locking manner. As a result, the heat accumulator can be produced particularly easily. In particular, it is possible to dispense with a core when foaming the thermal insulation on the container. Furthermore, can be dispensed mounting means for securing the thermal insulation of the container.

In a further embodiment, the first outer lateral surface and / or the inner lateral surface in the cross section is circular, wherein the second outer lateral surface is formed oval in the cross section.

In a further embodiment, the thermal insulation has a first insulating section with a first thickness and a second insulating section with a second thickness, the first thickness being smaller than the second thickness.

It is particularly advantageous if the second outer circumferential surface is formed flat in the first Dämmabschnitt, and / or the second outer lateral surface is curved in sections in the second Dämmabschnitt, preferably circular.

In a further embodiment, the first insulating section of the thermal insulation has a first material and the second insulating section of the thermal insulation has a second material, wherein the first material is different from the second material. It is particularly advantageous if the first and / or second material comprises at least one of the following materials: foam material, fiber insulation, polyurethane, polyurethane foam, phenolic resin, vacuum insulation, airgel.

In a further embodiment, the container has a connection, wherein the connection is arranged with a fixed end on the first outer lateral surface, wherein the connection adjacent to a free end comprises a connection portion for connecting the connection to a fluid-carrying component, wherein within the first and / or second Dämmabschnitts the free end ends. This embodiment has the advantage that the connection does not protrude beyond the second outer circumferential surface and the outer geometric space contour of the heat accumulator is determined exclusively by the second outer circumferential surface. Furthermore, mechanical damage to the connection during transport of the heat accumulator is avoided. In particular, snagging or jamming at the connection, for example during transport of the heat accumulator through a door, is avoided.

In a further embodiment, a maximum width of the heat accumulator is less than 80 cm and / or a maximum depth of the heat accumulator is greater than 80 cm and less preferably 3 m.

In a further embodiment, the heat accumulator is designed as a buffer storage and / or hot water storage.

The invention will be explained in more detail with reference to figures. Show:

1 shows a longitudinal section along a sectional plane A-A through a heat storage; FIG. 2 shows a half cross section along a sectional plane shown in FIG

B-B through the heat storage shown in Figure 1;

FIG. 3 shows a half cross section along a sectional plane BB shown in FIG. 1 through a variant of the heat accumulator shown in FIGS. 1 and 2; and FIG. 4 shows a half cross section along a sectional plane BB shown in FIG. 1 through a development of the heat accumulator shown in FIG.

1 shows a longitudinal section through a heat accumulator 10. The heat accumulator 10 is designed as a thermal storage for an air conditioning device and / or a fresh water supply.

For easier understanding, reference is made in FIGS. 1 and 2 to a coordinate system 5. The coordinate system 5 is exemplified as a legal system. The coordinate system 5 has an X-axis, a Y-axis, and a Z-axis. The Z-axis is arranged running in the direction of gravity. The X-axis and the Y-axis are transverse to the Z-axis. In this case, an extension in the X-direction is spoken by an extension into a width and in an extension in the Y-direction by an extension into a depth. When extending in the Z direction is spoken by the height

The heat accumulator 10 has a container 15 and a thermal insulation 20. The container 15 may, for example, as a material steel or plastic. The container 15 has an upper lid 35 and a lower lid 40 and a jacket portion 45. The cover 35, 40 and the shell portion 45 are connected to each other and fluid-tight define an interior 25. The shell portion 45 laterally bounds the interior 25, while the upper lid 35 on the upper side to the shell portion 45 defines the interior 25. On the underside of the jacket section 45, the interior space 25 is delimited by the lower cover 40. The jacket section 45 has on the outside a first outer lateral surface 50. In the embodiment, the skirt portion 45 is formed cylindrically with respect to a center axis 52 and has a cylinder diameter Dd. However, the jacket portion 45 may also be elliptical, polygonal, oval or otherwise designed.

In the interior 25, a preferably liquid storage medium 30 is arranged. The storage medium 30 may comprise, for example, water, wax and / or paraffin. The container 15 is pressure-stable and supports a pressure of the storage medium 30 from. The thermal insulation 20 serves to thermally insulate the container 15, in particular the inner space 25, with the heated storage medium 30 from an environment 95 of the heat accumulator 10.

The container 15 has, for example, a first connection 51 and a second connection 55. In addition, the container 15 may also have a third port 60 and a fourth port 65. The second terminal 55 is arranged in the direction of gravity below the fourth terminal 65. The first terminal 51 is disposed below the upper lid 35 and in the direction of gravity above the third terminal 55. In the embodiment, the terminals 51, 55, 60, 65 are arranged, for example, in a common plane.

In FIG. 1, by way of example, the connections 51, 55, 60, 65 are aligned so as to extend in the same spatial direction. Of course, it is also conceivable that the connections 51, 55, 60, 65 also extend in different spatial directions and / or are arranged offset in the circumferential direction with respect to the central axis 52. It is also conceivable that at least one of the connections 51, 55,

60, 65 is arranged on the upper or lower cover 35, 40.

The first port 51 and the second port 55 are preferably fluidly connected to the interior 25 of the container 15. Alternatively, it is also conceivable that the first and second ports 51, 55 are connected to a heat exchanger (not shown) arranged in the interior. The first port 51 can be used to discharge the storage medium 30 from the inner space 25 in order to provide the storage medium at a hot water supply station, while the storage medium 30 can be introduced into the inner space 25 of the container 15 via the second port 55. For this purpose, for example, the second connection can be connected to a fresh water supply. The connection 51, 55, 60, 65 is fastened with a fixed end 80 in each case on the first outer lateral surface 50. The connection 51, 55, 60, 65 further has a connection section 85, which may be formed by way of example as a thread. The connection section 85 adjoins in each case at a free end 86 of the connection 51, 55, 60, 65. The connection section 85 serves to connect the connection 51, 55, 60, 65 with a fluid-carrying means, for example a pipe, a screw connection, a hose, a tap.

In the embodiment, a heat exchanger 70 is provided by way of example in the interior 25 of the container 15. In this case, a primary side of the heat exchanger 70 is connected on the input side to the third connection 60 and on the output side to the fourth connection 65. In this case, in the embodiment, by way of example, the third connection 60 is arranged in the direction of gravity above the fourth connection 65. The fourth port 65 is exemplarily disposed above adjacent the lower lid 40. In this case, the third connection 60 can be connected, for example, to an air-conditioning device, in particular to a heating device or to a thermal solar module, wherein a heat-transfer medium 75 is introduced from the air-conditioning device into the primary side of the heat exchanger 70 via the third connection 60. The heat transfer medium 75 is guided through the primary side and heats the storage medium 30 on the secondary side of the heat exchanger 75. The heat transfer medium 70 is discharged via the fourth connection 65 from the primary side of the heat exchanger 70. Of course, it is also conceivable that the heat exchanger 70 and the third and fourth connection 60, 65 is dispensed with. For example, instead of or in addition to the heat exchanger 70, a heating cartridge may be provided.

The thermal insulation 20 preferably surrounds the container 15 completely on the outside, in particular on the circumferential side. The thermal insulation 20 has an inner circumferential surface 90 on the outside of the jacket section 45. The inner circumferential surface 90 is preferably located on the first outer circumferential surface 50 of the

Container 15 on. Particularly advantageously, the inner circumferential surface 90 with the first outer circumferential surface 50 of the shell portion 45 is materially connected. In this way, the thermal insulation 20 may be mechanically fixed to the container 15 in a simple manner. The thermal insulation 20 has a second outer circumferential surface 100. The second outer lateral surface 100 adjoins the environment 95. The second outer lateral surface 100 limits a maximum width Da of the heat accumulator 10. The maximum width Da of the thermal insulation 20 is chosen such that it is preferably smaller than 80 cm in order to ensure transportability and easy installation of the heat accumulator 10. As a result, the heat accumulator 10 in the fully assembled state can also be transported through bottlenecks of a building, eg a door, without the heat accumulator 10 having to be dismantled or the building having to be altered.

It is particularly advantageous in this case if the heat storage 10 is designed as a buffer memory and / or as a hot water tank for a fresh water network.

FIG. 2 shows a half cross section along a sectional plane B-B shown in FIG. 1 through the heat accumulator 10 shown in FIG.

The thermal insulation 20 extends circumferentially (relative to the central axis) to the container 15 and has a first Dämmabschnitt 105 and at least one second Dämmabschnitt 1 10 on. The second Dämmabschnitt 1 10 adjacent in the circumferential direction of the first Dämmabschnitt 105.

The first insulating section 105 has a first thickness di and the second insulating section 110 has a second thickness 2. The second thickness 2 is greater than the first thickness di. This is achieved, for example, by virtue of the fact that the first outer lateral surface 50 and the inner lateral surface 90, which in the embodiment are geometrically substantially identical, have a different shape in cross-section perpendicular to the direction of gravity to the second outer lateral surface 100. Thus, for example, the first outer lateral surface 50 and the inner lateral surface 90 are circular in cross-section, wherein the second outer lateral surface 100 is oval in cross-section. Of course, other embodiments of the shapes of the first outer circumferential surface 100 to the second outer circumferential surface 1 10 are conceivable.

In order to keep the maximum width Da low, the second outer circumferential surface 100 in the first insulating section 105 has a different geometric shape than in the second Dämmabschnitt 1 10. In the embodiment, the second outer circumferential surface 100 in the first Dämmabschnitt 105 is flat. In the second Dämmabschnitt 1 10, the second outer circumferential surface 100 is guided in a circle around a center M2, wherein the center M2 is arranged eccentrically to the central axis 52. It is particularly advantageous if a first radius r1 of the first outer lateral surface 50 is smaller than a second radius r2 of the second outer lateral surface 100 in the second insulating segment 110.

In order to ensure the maximum width Da of the heat accumulator 10, the connection 51, 55, 60, 65 ends between the inner circumferential surface 90 or the first outer lateral surface 50 and the second outer lateral surface 100. It is particularly advantageous if all of the connections 51 , 55, 60, 65, in particular the connection 51, 55, 60, 65, which is arranged in the first insulating section 105, does not protrude beyond the second outer lateral surface 100 and the free end 86 between the first outer lateral surface 50 and the second outer lateral surface 100 is arranged and ends in the first and / or second Dämmabschnitt 105, 1 10.

Thus, the connection 51, 55, 60, 65 does not protrude beyond the second outer circumferential surface 100, so that secure transport through the door of the building is ensured and the maximum width Da of the heat accumulator 10 is geometrically simply determined by the second outer circumferential surface 100 can be.

In order to ensure a particularly good thermal insulation of the container 15 and thus of the storage medium 30 in the interior 25 through the thermal insulation 20, the thermal insulation 20 in the first Dämmabschnitt 105 a first material and the second insulating portion 1 10 of the thermal insulation 20 to a second material. The first material is preferably different from the second material and preferably has a lower heat transfer coefficient than the second material.

It is particularly advantageous if the first and / or the second material comprises at least one of the following materials: foam material, fiber insulation, polyurethane, polyurethane foam, phenolic resin, vacuum insulation, airgel. FIG. 3 shows a half cross section along a sectional plane BB shown in FIG. 1 through a variant of the heat accumulator 10 shown in FIGS. 1 and 2.

The heat storage 10 is formed substantially identical to the heat storage 10 shown in Figures 1 and 2. Deviating from this, a material combination for the first material is provided in the first insulating section 105. In the embodiment, in the first Dämmabschnitt 105 designed as a panel 200 vacuum insulation is provided, which in a

Foam material 205, in particular in polyurethane foam, is embedded. In the second Dämmabschnitt 1 10 is dispensed to the panel 200. In this case, the second material has a further foam material 210. The further foam material 210 is identically identical to the foam material 205 of the first insulating section 105, wherein preferably the foam material 205 is formed in one piece and of the same material with further foam material 210.

Alternatively, it is also conceivable that the panel 200 of the vacuum insulation in the first and second Dämmabschnitt 105, 1 10 is arranged around the container 15 (dashed lines in Figure 3 shown) and in the foam material 205, 210 is embedded.

FIG. 4 shows a half cross section along a sectional plane B-B shown in FIG. 1 through a development of the heat accumulator 10 shown in FIG.

The heat accumulator 10 is formed substantially identical to the heat accumulator 10 shown in FIG. By way of derogation, several panels 200 of the vacuum insulation are arranged overlapping in the radial direction in the second insulating section 1 10. In the first Dämmabschnitt 105 only one layer of the panel 200 is provided here. As a result, a particularly good thermal insulation can be achieved by the thermal insulation 20.

The above-described embodiment of the heat accumulator 10 has the advantage that the heat accumulator 10 has a particularly good thermal insulation for the storage medium 30 and at the same time the heat accumulator 10 transitions well. is portable. At the same time, the thermal insulation 20 can be installed at the factory and is not mounted separately in a separate assembly step at the installation location of the heat accumulator 10. In addition, despite the compact design of the heat accumulator 15, the container 15 has a particularly large storage volume for storing the storage medium 30.

Furthermore, the thermal insulation 20 can be produced in a particularly simple manner, for example in a closed mold, without requiring a core for the production of the thermal insulation 20. The function of the core is formed by the container 15 during the production of the thermal insulation 20.

Further, by the above-described configuration, a maximum depth Ta of the heat storage 10, which extends perpendicular to the maximum width Da, can be made larger than the maximum width Da. Preferably, the maximum depth Ta of the heat accumulator 10 is greater than 80 cm and preferably less than 3 m. As a result, on the one hand, a secure transport through the bottleneck in the building allows and the heat storage 10 with mounted / mounted insulation 20 can be transported directly to the plant.

Furthermore, by a combination of the different materials in the first insulating section 105 and in the second insulating section 110, a particularly good thermal insulation of the container 15 relative to the surroundings 95 is ensured and specific to the geometric configuration of the insulating sections

105, 1 10 are adjusted. Furthermore, the thermal insulation 20 is formed particularly cost-effective, since, for example, high-quality materials, for example, the vacuum insulation or the airgel, are used only limited space on the first Dämmabschnitt 105, while in the second Dämmabschnitt 1 10 can be used as a particularly inexpensive material polyurethane foam. Thereby, the thermal insulation 20 may be formed particularly inexpensive. In summary, a particularly well-insulated heat accumulator 10 can be provided by the above-described embodiment of the heat accumulator 10, which is well adapted to space restrictions.

Claims

claims

1 . Heat storage (10) for an air conditioning device and / or for a hot water supply,

comprising a container (15) and a thermal insulation (20),

- wherein the container (15) delimits an inner space (25) at least in sections,

- wherein in the interior (25) a storage medium (30) can be arranged,

- Wherein on a first outer circumferential surface (50) of the container (15) the thermal insulation (20) is arranged to thermally isolate the container (15) from an environment (95),

- wherein the thermal insulation (20) has an inner lateral surface (90) and a second outer lateral surface (100),

- characterized in that

- The inner circumferential surface (90) to the second outer lateral surface (100) in a cross section perpendicular to a direction of gravity (g) has a different shape.

2. Heat storage (10) according to claim 1,

- Wherein the inner circumferential surface (90) on the first outer lateral surface (50) at least partially abuts and are preferably connected to one another cohesively.

3. heat accumulator (10) according to claim 1 or 2,

wherein the first outer lateral surface (50) and / or the inner lateral surface (90) is circular in cross-section,

- Wherein the second outer circumferential surface (100) is oval in cross-section.

4. Heat accumulator according to one of the preceding claims, - wherein the thermal insulation (20) comprises a first Dämmabschnitt (105) having a first thickness (di) and a second Dämmabschnitt (1 10) having a second thickness (d2),

- wherein the first thickness (di) is smaller than the second thickness (d2).

Heat storage (10) according to claim 4,

- Wherein the second outer circumferential surface (100) in the first Dämmabschnitt (105) is flat,

- and or

- Wherein the second outer circumferential surface (100) in sections in the second Dämmabschnitt (1 10) curved, preferably circular, is formed.

Heat accumulator (10) according to one of the preceding claims,

wherein the first insulating section (105) of the thermal insulation (20) comprises a first material and the second insulating section (110) of the thermal insulation (20) has a second material,

- The first material is different from the second material.

Heat accumulator (10) according to claim 6,

- wherein the first and / or the second material comprises at least one of the following materials:

- foam material,

- fiber insulation,

- polyurethane,

- polyurethane foam,

- phenolic resin,

- vacuum insulation,

- Airgel.

Heat accumulator (10) according to one of the preceding claims,

- wherein the container (15) has a connection (51, 55, 60, 65),

- wherein the terminal (51, 55, 60, 65) is arranged with a fixed end (60) (80) on the first outer lateral surface (50), - wherein the connection (51, 55, 60, 65) adjacent to a free end comprises a connection portion (85) for connecting the terminal (51, 55, 60, 65) to a fluid-carrying component,

- Wherein the free end (86) within the first or second Dämmabschnitts (105, 1 10) ends.

9. heat accumulator (10) according to any one of the preceding claims,

wherein a maximum width of the heat accumulator (10) is less than 80 cm,

- and or

- Where a maximum depth of the heat accumulator (10) is greater than 80 cm, and preferably less than 3 m.

10. heat accumulator (10) according to any one of the preceding claims,

- Wherein the heat storage (10) as a buffer memory and / or as

Hot water tank is formed.