DE202006004957U1 - Thermally insulated container used e.g. as a heat storage unit for solar-powered heating systems comprises an insulated body and a thermally insulated elastic insulating wall inserted into the outer wall in the region of the entrance - Google Patents

Abstract

Thermally insulated container comprises an insulated body made from a porous material which can be evacuated and supported and a thermally insulated elastic insulating wall (2) inserted into the outer wall (3) in the region of the entrance (1). The insulating wall surrounds the entrance and covers the material of the insulated body between the entrance and the outer can from atmospheric pressure. Preferred Features: The entrance is a flanged entrance arranged on the covering surface of the container. The covering surface is provided with a heat-insulating hood.

Description

The The invention relates to a thermally insulated container, in particular stationary Container, the z. B. as a heat storage for solar heaters and hot water supplies, as cold storage for refrigeration and refrigeration Air conditioners, as heat energy storage for power Warmth- Facilities or for process engineering applications find application.

[State of the art]

at larger insulated containers so far almost only conventional insulation in use. Depending on the temperature range, this consists of polymer foam or rock wool. Polymer foam ages especially at high temperatures very fast. Rock wool dissipates heat with a lambda value of 0.04 W / (m × K) 10 times more than a vacuum insulation.

Further Vacuum-insulated containers are also known, the inner wall by metallic spacers from the outer wall will be carried.

• Materialspannungen an den Zugängen zum Innenvolumen durch unterschiedliche Temperaturen von Innenbehälter und Außenwand.
• Temperaturbrücken an den Zugängen und den metallischen Abstandshaltern.
• Große Wanddicken bei Verwendung von Abstandshaltern um den atmosphärischen Druck zu kontern.

Disadvantages of these constructions are:

• Material stresses at the entrances to the internal volume due to different temperatures of the inner container and the outer wall.
• Temperature bridges at the entrances and the metallic spacers.
• Large wall thicknesses when using spacers to counter the atmospheric pressure.

OBJECT OF THE INVENTION

task The invention is a thermally insulated container, in particular stationary containers too create, the exquisite as long-term storage with at least one access to the filling and the possibility the supply and removal of heat energy, in the preferred temperature range of within - 30 ° C to +200 ° C, with the lowest possible heat energy loss, serves, a low-priced material-saving design with a long service life even when installed outside of buildings allowed. Furthermore should be compensated for material stresses at the entrances to the internal volume and temperature bridges from inside to outside wall be avoided.

The Task is solved with the features of the first protection claim. advantageous Further developments and embodiments are the subject of the dependent claims.

Of the thermally insulated containers, preferably as a stationary container is made of metal, has an interior space of one inner and an outer gas-tight Wall is surrounded. Between the two walls, an insulating body is arranged. Furthermore owns the container at least one opening as access to the interior.

Of the insulator consists of a porous, evacuable and sustainable Material that alone is able to increase the weight of the inner container too wear and all the walls to support against the ambient air pressure.

Necessary accesses to the Interior are in the area of the openings through the outer wall heat insulation by an elastic insulating wall which partially replaces the outer wall, sealed.

The elastic insulating wall should either by their material or by their shaping movements of the inner container against the outer wall take up.

Of the entire container is vacuum insulated except for the access (s). To avoid Thermal losses will be between the outer wall and the access one preferably thin, thermal insulating and elastic insulating wall attached.

Of the Whole area around the access can be additionally equipped with a heat-insulating Covered hood.

Of the thermal according to the invention isolated containers can be carried out without pressure or pressure. For non-pressurized execution an overflow to prevent inadmissible overpressure arranged to the interior.

Of the thermally insulated containers can be designed in the form of a cylinder or a cuboid, wherein in the cuboid shape, the bulging of the flat walls by the static pressure the fluid in the interior, by loaded on train connecting plates between the inner walls or by transverse walls at these, is prevented.

By the very low heat energy loss with well-insulated access to the container volume, is an economical Long-term storage of heat or cold possible. For a 5000 liter container with Storage medium water of 100 ° C and an outside temperature from 20 ° C is the heat loss on the first day about 0.2 ° C. This is not possible with a conventionally insulated container.

to Use as buffer and long-term storage for heating and cooling purposes becomes the thermally insulated container with water or an aqueous one solution filled.

As latent heat storage for heating or For cooling purposes, the container is filled with a medium having a suitable solid-liquid transition.

With a larger flange access the installation or replacement of heat exchangers is also possible later.

[Examples]

At Hand of drawings are the structure and operation of the Invention closer explained.

It demonstrate:

1 a schematic representation of the thermally insulated, stationary container in a cylindrical design,

2 an enlarged view of the arrangement of an elastic, gas-tight insulating wall,

3 the insulated container after 1 with a heat-insulating cover,

4 the arrangement of an elastic insulating wall for pipe access,

5 the arrangement of a replaceable elastic insulating wall and

6 the formation of the elastic insulating wall in the form of a corrugated hose or bellows.

1 shows a preferred, economically very cheap, non-pressurized design of the thermally insulated, stationary container in the form of a cylindrical long-term heat storage.

The interior 5 the container is from an outer gas-tight wall 3 and an inner gas-tight wall 4 surround. In the gap 7 between the two walls 3 and 4 is a vacuum insulating body 12 (shown in 2 ) arranged. In addition, the container has at least one closable opening 1 as access to the interior 5 ,

The insulator 12 in the gap 7 consists of a porous, evacuable and load-bearing material that alone is able to carry the weight of the container and all the walls 3 . 4 to support against the ambient air pressure.

Access 1 to the interior 5 is in the range of its breakthrough through the outer wall 3 heat-insulating by a relatively thin elastic and gas-tight insulating wall 2 sealed.

Of the thermally insulated, stationary Container needs one solid, level surface. If such a memory with a thermal Solar system charged, so he can the energy needs over a bad weather period cover. As a water heat storage are about 60 kwh / 1000 liters in a working temperature range of 48 ° C to Usable at 99 ° C. At a daily Hot water requirement of 200 liters, heated from 10 ° C to 45 ° C, 8.1 kwh are needed. One 3000 liter storage will do this for at least 20 days after full charge.

For the construction of the container, the walls can 3 . 4 made of stainless steel with approx. 1.5 mm thickness and below. The interior and the exterior floor of the walls 3 . 4 is preferably flat. As a substitute for a flat surface at the site can be a very stable console made of metal, by means of which the container is also easily moved by transport aids such as forklifts, pallet trucks, etc.

The vacuum insulating body 12 stiffens in the space 7 the entire insulated container, so that no additional supports that could form thermal bridges are necessary. The insulator 12 in the space 7 consists of an open-pored, pressure-resistant and heat-insulating filler. Preferably, microporous silica is selected as a sheet product. However, it is also possible to use porous calcium silicate, aluminum silicate as granules or sufficiently stiff mineral fiber mats.

As access 1 to the container interior 5 is a flange construction consisting of a flange gasket 9 and a closable lid 10 selected. In the container interior 5 is a heat exchanger 6 arranged, whose feeding pipes 11 through the flange cover 10 passed through. The heat exchanger 6 is only as a pipe bend with a flow and a return 11 for the supply and removal of heat in the container filling in the interior 5 shown schematically.

The elastic insulating wall 2 prevents the heat transfer from the flange construction 9 . 10 to the outer wall 3 and leaves movements of the flange construction 9 . 10 due to temperature changes. It is gas-tight with the flange construction 9 . 10 of access 1 and with the outside wall 3 connected.

As a material for the elastic insulating wall 2 Stainless steel type 1.4301 with a thickness of less than 0.6 mm is suitable. For the connection a welding with rotating sheet metal frame is chosen.

For evacuation and later vacuum inspection is with the gap 7 a stopcock 8th connected with shut-off quick coupling.

In an enlarged view shows 2 the elastic insulating wall 2 as one for access 1 encircling corrugated membrane, which together with encircling sheet metal frame 17 and 18 by triangular seam 16 to the outside wall 3 and a jetty 15 at the entrance 1 is welded gas-tight. The of the elastic insulating wall 2 The temperature-related axial movements to be recorded are 1.6 mm per meter high and 100 ° C. Furthermore, it is still to be expected that the load-bearing insulating material in the intermediate space will be about 15% of its height.

The inner wall 4 the container is directly above welds 23 with the access 1 welded.

In 3 is the long-term Isolationspeicher after 1 to better cover the access 1 with a cover 13 covered. The cover 13 is with an insulating material 14 , preferably filled with rock wool. This is the tempered area of the flange construction 9 . 10 of access 1 protected against energy loss. A preferred embodiment of this hood 13 covers the entire upper part of the container and protects the insulating material when installed outside buildings 14 and the sensitive technology from rainwater and from unauthorized access.

Of course, the pipes for the flow and return must 11 of the heat exchanger 6 be isolated.

For several smaller accesses, such as two 1 "threaded sockets, at the top and bottom of the cylinder wall 3 . 4 of the container, a cover is unnecessary 13 , In this case, the concern of a pipe insulation at this point is sufficient or a slightly larger insulating sleeve to isolate the pipe at this connection area.

Another embodiment of the arrangement of the insulating wall 2 , especially with pipe connections 19 shows in detail the representation 4 , The insulating wall 2 is on the one hand by a threaded nut 22 and a washer 21 against one in the inner wall 4 welded threaded sleeve 20 sealed, and on the other hand by means of a triangular weld 16 on the cylinder outer wall 3 gas-tight welded. As a heat-resistant seals were Viton O-rings 24 selected. The revolving sheet metal frame 18 , which is welded with, guarantees a secure welding of the relatively thin insulating wall 2 with the much thicker outer wall 3 ,

In 5 is an arrangement similar to the 4 shown in which the insulating wall 2 only with O-rings 24 is sealed. If the insulating wall is damaged 2 this is interchangeable without special tools and special knowledge. The insulating wall 2 can also be designed funnel-shaped or with several circumferential beads. The more elastic the insulating wall 2 The more it can move between the inner wall 4 and the outer wall 3 take up. A configuration similar to a corrugated tube or bellows is preferred.

The behind the outer wall 3 recessed threaded sleeve 20 offers advantages when assembling the container. One in the outer wall 3 welded O-ring holder 25 resembles the rounding of the cylindrical container shell 3 out, leaving the insulated wall 2 can be designed rotationally symmetrical.

The execution after 6 shows an elastic insulating wall 2 in the form of a corrugated hose or bellows in conjunction with a flange construction 9 . 10 of access 1 to the container interior 5 , By sealing with the O-rings 24 is the insulating wall 2 easy to replace if damaged. The O-rings 24 are by O-ring holder 25 held, of the one with the outer wall 3 and the other with the neck of the flange access 1 is welded.

1

Access to the interior as a flange construction

2

insulating wall

3

outer wall

4

inner wall

5

inner space

6

heat exchangers

7

gap

8th

stopcock with quick coupling

9

flange

10

flange

11

In front- and return to the heat exchanger

12

insulator partition

13

cover

14

insulator cover

15

web

16

triangle weld

17

surrounding sheet metal frame

18

surrounding sheet metal frame

19

pipe connection

20

threaded socket

21

washer

22

threaded nut

23

triangle weld

24

O-ring

25

O-ring holder

Claims (19)

Thermally insulated, in particular stationary container for storing large quantities of a heated or cooled medium with one, an interior ( 5 ) surrounding insulating body ( 12 ) formed by an external gastight wall ( 3 ) and an inner gastight wall ( 4 ) and at least one access ( 1 . 19 ) to the interior ( 5 ), characterized in that - the insulating body ( 12 ) consists of a porous, evacuable and load-bearing material and - in the area of access ( 1 . 19 ) a thermally insulating, elastic insulating wall ( 2 ) in the outer wall ( 3 ), the access ( 1 . 19 ) surrounds and the evacuated insulating material 12 between the access ( 1 . 19 ) and the outer wall ( 3 ) covers against the atmospheric pressure. Thermally insulated container according to claim 1, characterized in that the access ( 1 . 19 ) arranged on the top surface of the container flange access ( 1 ). Thermally insulated container according to claim 2, characterized in that the top surface of the container and the flange access ( 1 ) with a heat-insulating cover ( 13 ) is provided. Thermally insulated container according to claim 1, characterized in that when the container is depressurized an overflow to the interior ( 5 ) is arranged. Thermally insulated container according to claim 1, characterized in that a measuring device for monitoring the vacuum in the intermediate space ( 7 ) is arranged. Thermally insulated container according to claim 1, characterized in that a lockable access ( 8th ) to the intermediate space ( 7 ) is arranged. Thermally insulated container according to claim 1, characterized in that the insulating wall ( 2 ) with access ( 1 ) to the interior ( 5 ) and with the outer wall ( 3 ) is welded pressure-tight. Thermally insulated container according to claim 1, characterized in that the insulating wall ( 2 ) with access ( 1 . 19 ) to the interior ( 5 ) and with the outer wall ( 3 ) over pressed seals ( 24 ) is mounted. Thermally insulated container according to claim 8, characterized in that the over-pressed seals ( 24 ) mounted insulating wall ( 2 ) is arranged interchangeably. Thermally insulated container according to claim 1, characterized in that the insulating wall ( 2 ) with access ( 1 . 19 ) to the interior ( 5 ) and with the outer wall ( 3 ) is connected via seams treated with sealant. Thermally insulated container according to claim 1, characterized in that in the interior ( 5 ) at least one heat exchanger ( 6 ) is arranged. Thermally insulated container according to claim 1, characterized in that the insulating wall ( 2 ) the shape of the container outer wall ( 3 ) and at least partially made of thin sheet metal under 0, 8 mm. Thermally insulated container according to claim 1, characterized characterized in that the container has a level bottom. Thermally insulated container according to claim 1, characterized characterized in that the container has a cuboid shape. Thermally insulated container according to claim 1 and 14, characterized in that the inner walls in the interior ( 5 ) are supported for absorbing the static internal odor. Thermally insulated container according to claim 1, characterized characterized in that the container has a cylindrical shape. Thermally insulated container according to claim 1, characterized in that the elasticity of the insulating wall ( 2 ) by the material or the shape of the insulating wall ( 2 ) is reached. Thermally insulated container according to claim 16, characterized in that the insulating wall ( 2 ) is designed as a bellows or corrugated hose. Thermally insulated container according to claim 1, characterized characterized in that the container placed on a stable console or mounted.