JPH05106981A - Heat accumulator - Google Patents

Abstract

PURPOSE: To improve a thermal storage effect by arranging an inside container for containing a thermal storage core in an outside container, and providing a preventing means for preventing heat flow of a direction longitudinally perpendicular to each duct in a liquid supply duct and a discharge duct communicating with the inside container. CONSTITUTION: The thermal storage apparatus comprises a cylindrically inside container 10 for winding a thermal storage core and containing it, and a cylindrically outside container 12 for containing the container 10 at an insulating gap 14. A fluid supply duct 16 having bents 24 and an exhaust duct 18 are connected to one end side of the container 10, and the ducts 16, 18 are externally led through a wall of the container 12, with such an apparatus, heat insulating fixed mounts 40 of a sectional spiral shape are provided in the ducts 61, 18. The outsides of the ducts 16, 18 are covered with porous chamber heat insulators 30, and the outside of a heat insulator 30 is oppositely arranged with a radiation shielding plate 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage device, and more particularly to a heat storage device having a heat storage core.

[0002]

2. Description of the Related Art An inner container is provided around a heat storage core, and an outer container is provided around the inner container.
Conventionally, a heat storage device having a duct that penetrates the outer container and communicates with the inner container has been conventionally used, and a latent heat storage type heat storage device of this type is disclosed in, for example, European Patent No. 0294500.

[0003]

In this type of heat storage device, the duct parts running upward and downward respectively in the insulating gap between the inner container and the outer container have the function of forming an insulating boundary layer. In the quiescent state, the width of the heat transfer fluid between the high temperature fluid arranged inside the heat storage device and the low temperature fluid arranged outside the heat storage device is determined to provide an insulating effect. However, in this type of heat storage device, convective heat transfer occurs between the duct part and the insulating space across the supply duct for the heat transfer fluid and the discharge duct for the discharge fluid, which causes the formation of the boundary layer. Weaken. That is, a heating effect area is formed near the lower ends of these supply ducts and discharge ducts by the fluid flowing out from the hot inner container, while heat is discharged from the hot inner container near the upper ends of these supply ducts and discharge ducts. The reason is that a cooling effect area is formed which propagates to the container.

The present invention has been made in view of the present situation of the operation of the heat storage device of this kind as described above, and its purpose is to prevent heat flow in the direction perpendicular to the longitudinal direction of the supply duct and the discharge duct, and to make the boundary layer described above. The object of the present invention is to provide a heat storage device in which the heat storage effect is enhanced by clearly forming the heat storage effect.

[0005]

In order to achieve the above-mentioned object, the present invention is basically arranged between an inner container (10) arranged around a heat storage core and the inner container (10). An outer container (12) arranged so as to surround the inner container (10) by forming an insulating gap, and for an inflow fluid penetrating the side surface of the outer container (12) to the inner container (10). It is configured to have a supply duct and a discharge duct for discharge fluid, and a preventive unit provided in the supply duct and the discharge duct to prevent heat flow in a direction perpendicular to the longitudinal direction of the supply duct and the discharge duct.

[0006]

With this structure, the heat flow in the direction perpendicular to the longitudinal direction of the supply duct and the discharge duct is prevented by the prevention means. Therefore, the insulating boundary layer is clearly formed in the supply duct and the discharge duct, and the heat storage effect is improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view showing the overall construction of the first embodiment, FIG. 2 is a sectional view taken along the line A--A of FIG. 1, FIG. 3 is a partially enlarged view of FIG. 2, and FIGS. It is sectional drawing which shows the structure of the principal part of 2 and 3rd Example.

As shown in FIG. 1, the heat storage device according to the embodiment has a cylindrical inner container 10 and a cylindrical outer container 12 similarly.
And an insulating space 14 is formed between them. The inflow fluid supply duct 16 and the exhaust fluid exhaust duct 18 are coupled to the inner container 10 at the upper end wall 20 of the inner container 10 and extend through the insulating space 14 to guide vertically downward from the outer container 12. He has been outsourced.

The supply duct 16 and the discharge duct 18 adjacent to the inner container 10 each have a bend 24, which is connected to a straight vertical duct portion 26.

In the embodiment, during the heat storage step, the fluid circulation is terminated while the fluid inside the inner container 10 is kept at a temperature higher than the outer temperature, and the temperature of the fluid outside the outer container 12 gradually drops to the ambient temperature. ing. On the other hand, in the vicinity of the inner container 10, the fluid in the supply duct 16 and the discharge duct 18 retains a high heat storage temperature, and transfer of heat from the inner container 10 to the lower parts of these ducts 16, 18 and If the transfer of heat from the upper part of the ducts 16, 18 part of the duct to the outer container 12 does not interfere with the formation of the boundary layer, the cold fluid remains in the lower part of the vertical part of these ducts 16, 18 which extend through the insulating space. To do. The hot liquid then remains on top of these ducts 16,18 so that a boundary layer is formed in the vertical portions of these ducts 16,18.

As described above, in order to prevent heat flow in the direction perpendicular to the longitudinal direction of the supply duct 16 and the discharge duct 18 which weakens the formation of the boundary layer, in the first embodiment, as shown in FIG. A fixed mounting body 40 of a heat insulating material having a spiral cross section is provided inside the discharge duct 18. As shown in FIG. 3, between the adjacent winding layer portions of the fixed mounting body 40, a protrusion 42 for setting a constant distance between the winding layer portions.
Is provided.

Further, the supply duct 16 and the discharge duct 18
A porous heat insulating material 30 is coated on the outer side of the, and radiation shielding plates 32 are arranged on the outer side of the porous heat insulating material 30 so as to face each other.

FIG. 4 shows the supply duct 1 in the second embodiment.
6 is a cross-sectional view of the exhaust duct 18 and the discharge duct 18, and in the second embodiment, the thermal insulation layer 3 is formed on the inner peripheral surface of these ducts 16, 18.
4 is coated. The configuration of the other parts of the second embodiment is the same as that of the first embodiment already described.

FIG. 5 shows the supply duct 1 in the third embodiment.
6 is a sectional view of the discharge duct 6 and the discharge duct 18;
In the discharge duct 18, a plurality of glass fiber boards 44 are arranged parallel to each other in the longitudinal direction.
A flow groove 46 is formed between them. The configuration of the other parts of the third embodiment is the same as that of the first embodiment already described.

Due to this structure, the first
According to the third to third embodiments, the heat flow (convection and radiant flow) in the direction perpendicular to the longitudinal direction of the supply duct 16 and the discharge duct 18 is fixed mounting body 40, porous heat insulating material 30,
This is prevented by the radiation shielding plate 32, the heat insulating layer 34, and the glass fiber board 44, and the insulating boundary layer is clearly formed to increase the heat storage effect.

The present invention can be implemented in various modes other than the above-described first to third embodiments, and the supply duct 16 and the discharge duct 18 are surrounded by a radiation shielding material. The present inventors have confirmed that it is preferable to maintain a gap between the radiation shielding material and the outer peripheral surfaces of the ducts 16 and 18 in this case. In addition, the duct part is surrounded by compressed glass fiber, the duct part is wrapped with multiple overlapping radiation reflection foils, the duct parts are each wrapped with microporous heat insulating material, and the insulating gap is microporous. It can also be filled with a heat insulating material.

Further, in order to prevent heat conduction, it is possible to apply a radiation reflecting coating film on the outside of the duct portion, and in addition to this coating film, the casing can be arranged on the outside of the duct portion. It is also possible to arrange, for example, compressed glass fiber or a heat insulating material such as a heat insulating porous material on the outside of the duct portion. Alternatively, the radiation reflecting foil may be wound around the duct portion so as to form a plurality of lap winding coils.

Further, the supply duct 16 and the discharge duct 18
It has been found that the duct section consisting of is preferably made of plastic to prevent heat conduction across the duct.

[0020]

As described above in detail, in the present invention, the supply duct and the discharge duct are provided with the prevention means for preventing the heat flow in the direction perpendicular to the longitudinal direction of the supply duct and the discharge duct. Also, no heat flow that hinders the formation of the boundary layer in the exhaust duct is generated, and the heat storage effect is significantly improved.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an overall configuration of a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a partially enlarged view of FIG.

FIG. 4 is a cross-sectional view showing a configuration of a main part of a second embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a configuration of a main part of a third embodiment of the present invention.

[Explanation of symbols]

 10 Inner Container 12 Outer Container 14 Insulating Gap 16 Supply Duct 18 Discharge Duct

Claims (6)

[Claims] 1. An inner container (10) arranged around a heat storage core, and an insulating gap is formed between the inner container (10) and the inner container (10). Outer container
(12), a supply duct for inflow fluid and a discharge duct for discharge fluid, which penetrates the side surface of the outer container (12) and communicates with the inner container (10), and are provided in the supply duct and the discharge duct. A heat storage device for preventing heat flow in a direction perpendicular to the longitudinal direction of the supply duct and the discharge duct. 2. The fixing means is a fixed mount body which is extendedly arranged in the flow direction of the supply duct and the discharge duct at a high density in a plane perpendicular to the flow direction of the fluid to form a flow dividing path. The heat storage device according to claim 1. 3. The heat storage device according to claim 2, wherein the fixed mounting body is a plurality of glass fiber plates arranged in parallel to each other in a flow direction. 4. The heat storage device according to claim 1, wherein a cross section of the fixed mounting body perpendicular to the flow direction has a spiral shape. 5. A heat storage device according to any one of claims 1 to 4, characterized in that radiation shielding means is provided outside the supply duct and the discharge duct. 6. A heat storage device according to any one of claims 1 to 4, wherein the insulating gap is filled with a microporous material.