JPS5964689A - Heat storing container - Google Patents

Abstract

PURPOSE:To provide a heat storing container which has buldged parts to make it easy to collect and solidify residues in heat storing material, thus facilitating convection heat transfer and preventing supercooling of the material. CONSTITUTION:A latent heat storing material 2 is contained in a heat storing container 1 made of plastic or metal. The container 1 has necks 6 near the ends to form bulged parts 5. The heat storing material is sealed in the container and residues 3 in the material are collected in the bulged parts 5. Thus the residues are prevented from diffusing into the container. To solidify the residues and prevent them from floating, at least one substance selected from the group consisting of Ca(OH)2, CAO, Mg(OH)2, CaCO3, CaSO4, CaSiO3 and derivatives thereof is put in the bulged parts to enclose the residues 3. This improves convection heat transfer within the heat storing material, prevents supercooling, reinforces the heat storing container, improves the efficiency of convection heat transfer to outside fluid and makes it easier to take out heat.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to the structure of a heat storage container containing a latent heat storage material for storing solar heat, late-night electricity, etc.

[Prior art]

Conventionally, heat storage materials that utilize so-called sensible heat such as water have been widely used as heat storage materials. However, the heat storage density is low, so inorganic hydrated salts such as hexahydrated calcium chloride (CaC/4.6H2O melting point 28C) are used instead, and the large latent heat generated when it solidifies and melts is utilized. Attempts have been made to downsize heat storage devices using latent heat storage materials. However, in putting this into practical use, there are the following problems in terms of materials and container structure. In other words, it is expensive to use a latent heat storage material containing reagent pins, so
Generally, industrial products are used after simple purification. However, the purity is not good and a residue remains.

Therefore, during actual use, during the solidification and melting of the latent heat storage material, the residue floats inside, which impedes internal convective heat transfer.
It becomes difficult to extract heat smoothly from the heat storage material. (a) When an inorganic hydrated salt is used as a heat storage material, supercooling is likely to occur, and a nucleating agent is generally added to prevent this supercooling, but there is a disadvantage that the nucleating effect is lost due to floating residue.

[Purpose of the invention]

It is an object of the present invention to improve the structural aspects of a heat storage container by solving the above-described problems specific to industrial heat storage materials.

[Embodiments of the invention]

FIG. 1 is a structural diagram of a heat storage container of the present invention, and FIG. 2 is a view taken along the line AA' in FIG. A latent heat storage material 2 is contained in a heat storage container 1 made of plastic or metal.

At the corner of the heat storage container 1, a convex portion 6 is formed toward the inside of the heat storage container l.
(I) On the contrary, the recess 5 is formed. After the heat storage material 2 is sealed, the residue 3 therein is collected in the recess 5.

-ff [The remaining S3 collected in the recess 5 becomes difficult to diffuse inside due to the presence of the protrusion 6. Furthermore, in order to harden this residue 3 and prevent it from floating, calcium hydroxide, calcium oxide, magnesium hydroxide, calcium carbonate, etc.
One or more first substances 4 selected from the group consisting of calcium sulfate, calcium silicate, and their derivatives are placed inside the residue 3 so as to surround it as shown.

FIG. 3 is a modification of FIG. 1. In this case, a large number of convex portions 6 are provided not only at the corners of the heat storage container 1, but also as shown in the figure, thereby creating a large number of concave portions 5. As in FIG. 1, the residue 3 is collected in these four parts, and the first substance 4 is placed to surround it.

Fig. 4 shows another embodiment, and Fig. 5 shows BB' in Fig. 4.
FIG. In the embodiments shown in FIGS. 1 and 3, the protrusions 6 are provided at right angles to the longitudinal direction of each rare heat container l, but in the example shown in FIG. It has been established. In this way, when carrying the heat storage container l,
The heat storage container 1 becomes stronger in terms of strength.

FIG. 6 shows another embodiment. This is made by forming a large number of narrow recesses 5 toward the outside of the heat storage container 1. FIG. 7 is an enlarged view of part 0 of FIG. 6.

FIG. 8 is a modification of FIG. 7. This is done by expanding the recess 5 outward into a bag-like shape as shown in the figure, and placing the residue 3 deep inside the recess 5 to prevent it from spreading. In this embodiment, since a large number of concave portions are provided facing outward, when the fluid is applied to the outer surface of the heat storage container and the heat stored deep in the heat storage material inside is extracted, the heat transfer area increases and the turbulent flow effect increases the heat transfer area. It becomes easier to take out.

FIG. 9 shows another embodiment, and FIG. 10 shows D-D of FIG. 9.
'This is a cross-sectional view. This is because the extreme end of the heat storage container 1 is widened as shown in the figure, and a recess 5 is provided.

In this embodiment, a second substance is placed in the heat storage material 2 as a nucleating agent for preventing supercooling. / Kotoba Heat Storage Material 2
As the second substance 7, strontium oxide, strontium iodide, strontium iodide hexahydrate, strontium phosphate, strontium hydroxide, strontium hydroxide octahydrate are used as the second substance 7. Good to use. The combination of the first substance and the second substance is also important; if the heat storage material 2 is 6-hydrocalcium chloride, it is best to use calcium hydroxide as the first substance and strontium oxide as the second substance. In this case, the degree of supercooling is approximately zero.

[Effects of the Invention] As explained above, according to the present invention, the residue is easily collected in a part of the heat storage container, so that it is not easily solidified, and the convective heat transfer inside the heat storage material is improved, and the supercooling phenomenon is prevented. can now be prevented. In addition, the heat storage container becomes stronger and the convection heat transfer coefficient of the external fluid improves, making it easier to extract heat.
, it has become convenient for practical use.

[Brief explanation of the drawing]

Fig. 1 is a structural diagram of a post-heating container according to an embodiment of the present invention, Fig. 2 is a view taken along the line A-A' in Fig. 1, Fig. 3 is a modification of Fig. 1 and Fig. 4. Another embodiment of the present invention FIG. 5 is B of FIG. 4
-B' sectional view, Fig. 6 is a modification of Fig. 5, Fig. 7 is a variation of Fig. 6.
8 is a modification of FIG. 7, FIG. 9 is an actual case of a pond, and FIG. 10 is a sectional view taken along line DD' in FIG. 9. 1... Heat storage container, 2... Heat storage material, 3... Residue, 4
・・・No.1-Hanging No.6 VJ5 Figure

Claims (1)

[Claims] (1) A heat storage container containing a heat storage material, which is provided with four parts for collecting and easily solidifying the residue in the heat storage material. 2. After collecting the residue in the concave part of the heat storage container, one selected from the group of calcium hydroxide, calcium oxide, magnesium hydroxide, calcium carbonate, calcium sulfate, calcium silicate, and derivatives thereof or 2. The heat storage container according to claim 1, wherein two or more types of first substances are placed so as to solidify the residue. 3. Use hexahydrated calcium chloride as a heat storage material, collect its residue in the recess of the heat storage container, and then add calcium hydroxide, calcium oxide, magnesium hydroxide, calcium carbonate, calcium sulfate, calcium silicate, and their derivatives. One or more first substances selected from the group are added to solidify the residue, and further strontium oxide, strontium iodide, strontium iodide hexahydrate, strontium phosphate, and strontium hydroxide are added. , strontium hydroxide octahydrate, and one or more second substances selected from strontium hydroxide octahydrate. 4. The heat storage container according to claim 3, wherein a part of the second substance is mixed with the first substance.