JPS6026897A - Storage vessel for hydride - Google Patents

Abstract

PURPOSE:To relieve the generation of partial stress due to expansion, by installing a hydrogen gas permeable filter, whose concave part has such materials as discharging and occluding the hydrogen gas in accordance with rise and fall in temperature and pressure, inside a vessel. CONSTITUTION:Such alloying powder 14 as being easy to produce a hydride capable of absorbing or discharging hydrogen is charged in the concave part of a porous web filter 10 carrying hydrogen gas permeability. And, the said web filter is set up inside a package 9, making up a unit vessel there. When a hydride is formed upon acclusion of hydrogen, hydrogen gas is led into a hydrogen gas occluding and discharging port 11 or space of the convex part of the web filter 10, and when the setting surface of a pin 12 is cooled after passing a cooling fluid through a heating-cooling passage 13, the alloying powder 14 reacts on the hydrogen gas run past the web filter 10 and thereby the hydride is formed. Cubical expansion in time of hydride formation is easily achieved because the concave part of the web filter 10 is widened toward the end. Therefore, partial expansion is thus relieved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydride storage container, in particular, which has a large heat transfer area when releasing and occluding hydrogen gas, and is capable of preventing expansion and storage of hydride.
The present invention relates to the container that can sufficiently cope with shrinkage.

An example of a conventionally proposed container is shown in FIG. 1st
FIG. 1(A) shows the external appearance of the container, and FIGS. 1(B) and 1(C) are sectional views taken along the line AA in FIG. 1(A) of different methods.

In FIG. 1, 1,1/ is a heating and cooling fluid inlet and outlet;
2 is hydrogen gas intake/exhaust date, 3 is shell, 4 is tube, 5 is fin, 6 is heating and cooling fluid, 7 is hydride powder, 8
is a hydride storage vessel.

FIG. 1(B) shows a structure in which fins 5 are provided within the shell 3, and FIG. 1(C) shows a structure in which a tube 4 is provided within the shell 3. We are trying to increase the thermal conductivity to speed up the process.

Conventional containers have a structure that mainly aims to increase thermal conductivity, and the shell body remains the same as before, and no measures are taken to prevent the expansion and contraction of hydride that occurs when hydrogen gas is taken in and discharged. . This not only means that an expansion change of about twice the volume that occurs when hydrogen gas is absorbed occurs locally, and there is a risk of destruction due to the local load stress on the shell body (in reality, shell expansion phenomenon occurs). Furthermore, it is difficult to scale up the conventional shell type with the same performance.

In order to eliminate the drawbacks of the above-mentioned conventional containers of this type, the present invention has the following features:
We should propose a container that can be made larger, has a large heat transfer area for heating and cooling the hydride, and can easily follow the changes caused by the expansion and contraction of the hydride. This is a hydrogen gas permeable filter in which a material that releases and absorbs hydrogen gas depending on temperature and pressure changes is inserted into the recess, and fins are provided inside and/or outside of the surface that becomes the heat transfer surface. This is a hydride storage container characterized in that it is installed in a container.

The hydrogen gas permeable filter used in the container of the present invention is generally a stainless steel or bronze sintered alloy having permeation holes of 30 μm or less in diameter, and the container material is a hydrogen-resistant material that is suitable for use in low-pressure pressure vessels, etc. Commonly used materials such as SUS-based materials can be used. In addition, NaN is a material that releases and stores hydrogen gas.
An i5+ Mg21Ji based alloy powder is used.

Hereinafter, one embodiment of the present invention will be described with reference to FIG.

FIG. 2(A) is a sectional view of a container according to an embodiment of the present invention, FIG. 2(B) is an enlarged view of the unit storage container of FIG. 2(A), and in FIG. 2, 9 is a package. , 1o is a hydrogen gas permeable wave filter, 11 is a hydrogen gas intake/exhaust passage, 12 is a fin, 13 is a heating and cooling fluid passage, 14 is a hydride powder, and 15 is an expansion space.

In the container of the present invention, as shown in FIG. This wave filter 10 consists of a unit container installed inside a package 9, which has fins 12 attached to the inside and outside of both end surfaces to enhance heat transfer performance.

When storing hydrogen, that is, when generating a hydride, hydrogen gas is introduced into the hydrogen gas intake/exhaust port 11, which is a space in the convex part of the wave filter 10, and the hydrogen gas is introduced into the heating/cooling passage 13.
When cooling fluid is passed through the fins 12 to cool the mounting surface of the fins 12, the alloy powder 14 reacts with the hydrogen gas passing through the wave filter 10 to generate hydrides. At this time, the volume expansion during hydride generation can be easily achieved because the wave filter 10 spreads from the four parts toward the end, and local expansion is alleviated.

When discharging hydrogen, heating fluid is passed through the heating/cooling passage 13 to heat the mounting surface of the fins 12 to decompose the hydride, and hydrogen gas is discharged from the hydrogen gas intake/discharge port 11 through the wave filter 10.

Note that depending on the properties of the hydride, the wave spacing can be changed freely, and the mounting fins 12 can be made parallel to or perpendicular to the wave filter 1o, and by reducing the spacing, hydrogen gas intake and exhaust performance can be improved. .

Furthermore, the capacity can be easily increased by stacking the packages 9. FIG. 2(B) is an example of stacking the packages.

By using the container of the present invention, in other words, since the hydride is charged into the concave part of the wave filter, it is possible to alleviate the local stress caused by expansion, and also to reduce the decrease in hydrogen gas suction and discharge performance due to increased capacity. Because of the layered packaging and the fact that both sides can be used as heat transfer surfaces, there is no decrease in performance due to increased capacity. Furthermore, since a wave-shaped filter is used, the filter area becomes larger, which has the effect of increasing the permeation rate of hydrogen gas.On the other hand, the convex part can be used as a passage for hydrogen gas, which has the effect of increasing the rate of gas absorption and exhaustion. .

[Brief explanation of the drawing]

Figure 1 shows a conventional hydride storage container, Figure 1 (A) shows its appearance, Figure 1 (BI Figure 2 shows an embodiment of the container of the present invention, and Figure 2 (A)
is a sectional view of the container of the present invention, and FIG. 2(B) is FIG. 2(A).
FIG. 2 is an enlarged view of a unit storage container of FIG. Sub-agents 1) Meiji agent Ryo Hagiwara - Figure 1 (A) Figure 2 (A)

Claims (1)

[Claims] A hydrogen gas permeable filter whose recesses are filled with a material that releases and absorbs hydrogen gas depending on the level of temperature and pressure is installed in a container with fins on the inside and/or outside of the surface that becomes the heat transfer surface. A hydride storage container characterized by: