JPH06281371A - Heat storage capsule - Google Patents

Abstract

PURPOSE:To reduce a heat transfer resistance of a heat storage material in a capsule by filling, in addition to the material, metal gauze or wire material made of metal having high thermal conductivity in the capsule. CONSTITUTION:A heat storage material 3 and a metal gauze 2 made of copper for expediting heat transfer in a spherical capsule made of metal are filled in the capsule to constitute the capsule 1. Many capsules 1 are filled in a charging vessel 4 having a heat transfer fluid inlet 6 and a heat transfer fluid outlet 7. Heat transfer fluid 5 cooled by a heat exchanger is supplied from the inlet 6 into the vessel 4, passed through the vessel 4, discharged from the outlet 7 to derive heat from the capsule 1 while the fluid is filled in the vessel 4 and passed through gaps of the capsule 1 to reduce a temperature in the capsule 1, to solidify the material 3 and to generate ice. Accordingly, heat transfer resistance in the capsule 1 can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention fills a heat storage capsule in which a heat storage material is enclosed with a wire mesh or wire made of copper or other metal having high thermal conductivity to improve the heat transfer performance in the capsule. Regarding heat storage capsules.

[0002]

2. Description of the Related Art As one of heat storage methods, latent heat storage utilizing latent heat accompanying a phase change is known, and a capsule type is known as a heat exchange means for performing latent heat storage. In this latent heat storage capsule, a sphere, a cylinder, or a plate-shaped capsule is filled with a heat storage material (water), and the heat stored in the heat storage material is removed by a heat transfer fluid (brine) to solidify the heat storage material (ice). By doing so, heat can be stored.

[0003]

However, in this heat storage capsule, although the heat transfer resistance between the heat transfer fluid and the capsule is relatively small, the heat transfer resistance of the heat storage material solidified in the capsule is large, The heat transfer resistance of the material is the dominant factor that reduces the heat transfer performance of the entire heat storage system. Therefore,
Such a heat storage capsule requires a long heat storage time for the heat storage material to solidify and store heat, and it is difficult to follow a sudden load change on the load side during heat dissipation of the heat storage material.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat storage capsule that reduces the heat transfer resistance of the heat storage material in the capsule and improves the heat transfer resistance of the entire heat storage system.

[0004]

That is, the above object of the present invention is to provide a latent heat storage capsule in which, in addition to the heat storage material, a metal wire mesh or wire rod having a high thermal conductivity is filled. To be achieved.

[0005]

[Function] Since the metal wire mesh having high thermal conductivity is filled in the capsule together with the heat storage material, the heat transferred to the capsule by the heat transfer fluid is immediately transferred to the heat storage material, and the heat storage material in the capsule. It is possible to reduce the heat transfer resistance of the heat storage material, and thereby the heat storage material can be solidified in a short time.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a structural diagram of a heat storage capsule according to an embodiment of the present invention. In this embodiment, water is used as a heat storage material as a heat storage material, and water is solidified into ice, and a wire mesh is filled in the capsule in addition to the heat storage material in order to reduce heat transfer resistance. The wire mesh-filled ice heat storage capsule will be described. In the figure, this heat storage capsule 1 includes a heat storage material (water) 3 in a metallic spherical capsule,
In order to promote heat transfer in the capsule, it is filled with a copper wire mesh 2. As the heat storage material, CaCl ₂ · 6H ₂ O or Na ₂ SO ₄ · 10H ₂ may be used instead of the above structure.
Various inorganic hydrated salts such as O and organic substances such as paraffin are used. Further, instead of the wire mesh, a metal wire having high thermal conductivity may be filled in the capsule. Furthermore, the capsule is not limited to metal, but may be plastic.

Next, the operation of this heat storage capsule will be described based on a heat storage device using a large number of the heat storage capsules. FIG. 2 shows this heat storage device, and the heat storage device is
A large number of heat storage capsules 1 are filled in a filling container 4 having a heat transfer fluid inlet 6 and a heat transfer fluid outlet 7. In such a device, in the heat storage process, the heat transfer fluid 5 cooled by a heat exchanger (not shown) is supplied from the heat transfer fluid inlet 6 into the filling container 4, passes through the inside of the container 4, and passes through the heat transfer fluid outlet 7
When the heat transfer fluid is filled in the container 4 and passes through the gap of the capsule 1,
The heat is removed from the heat storage material, and the temperature inside the capsule is lowered to solidify (ice) the heat storage material 3 to generate ice. On the other hand, in the heat dissipation process of circulating cold water to the load, when the heat transfer fluid 5 warmed by the load flows into the filling container 4, the ice in the capsule 1 removes heat from the heat transfer fluid 5 and becomes liquid (water). The heat dissipation process ends when returning to.
In this series of heat transfer, in the conventional device, the heat transfer resistance between the heat transfer fluid and the capsule was relatively small, but the heat transfer resistance of the solidified heat storage material in the capsule was large, so the heat transfer of the entire heat storage system was large. Although the thermal performance was reduced, as described in this example, by filling the wire mesh in the capsule,
The heat transfer resistance in the capsule is reduced, and therefore the heat transfer performance of the entire heat storage system can be improved.

[0008]

As described above, according to the present invention, in addition to the heat storage material, the metal wire mesh or the metal wire material having high thermal conductivity is filled in the capsule, so that the heat transfer resistance of the capsule itself is reduced. It becomes possible to store heat in a short time. Further, the followability is improved even for a sudden load change. In addition, since the heat transfer resistance can be reduced even in a larger capsule, the capsule can be used, so that a reduction in equipment cost can be expected.

[Brief description of drawings]

FIG. 1 is a structural diagram of a wire mesh-filled ice heat storage capsule according to the present invention.

FIG. 2 is a configuration diagram of a heat storage device filled with this capsule.

[Explanation of symbols]

 1 Capsule 2 Wire Mesh 3 Heat Storage Material 4 Filling Container 5 Heat Transfer Fluid 6 Heat Transfer Fluid Inlet 7 Heat Transfer Fluid Outlet

Claims (1)

[Claims] 1. A latent heat storage capsule, characterized in that, in addition to the heat storage material, a metal wire mesh or wire having a high thermal conductivity is filled.