JPS60205191A - Vessel for metallic hydrogenated substance - Google Patents

Abstract

PURPOSE:To obtain the vessel for metallic hydrogenated substance, compact and provided with good heat transfer efficiency, by a method wherein a pressure vessel, a heat pipe and a heat exchanger are integrated by employig a cylindrical body having three- layered structure while heat medium is flowed through the outermost layer, the intermediate layer is filled with the metallic hydrogenated substance and the heat medium is flowed through the innermost layer. CONSTITUTION:Three layers 4, 5, 6 are formed by cylindrical tubes 1, 2, 3. Upon heat accumulating, the heat medium is flowed through the outermost layer 4 and the innermost layer 6 and whereby the heat is transferred to the metallic hydrogenated substance in the intermediate layer 5. According to the heat transfer, hydrogen releasing reaction is caused in the metallic hydrogenated substance and generated hydrogen is extracted through a hydrogen inlet and outlet conduit 11 to store as hydrogen. On the other hand, upon heat dissipation, the metallic hydrogenated substance absorbs the hydrogen supplied from the filter section 11A of the hydrogen inlet and outlet conduit 11 and heat is generated. The heat is transferred to the heat medium flowing through the outermost layer 4 and the innermost layer 6 to retrieve it by the heat medium. According to this method, the vessel, compact, less in heat loss and excellent in the heat transfer efficiency, may be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a metal hydride container suitable for storing heat or the like using a metal hydride.

Prior Art Various metals or alloys absorb a large amount of hydrogen at a density equal to or higher than that of liquid hydrogen to generate metal hydrides, and the generated metal hydrides control temperature, hydrogen pressure, etc. It is already known that the metal or alloy returns to its original form by releasing hydrogen. Utilizing these properties, attempts have been made to apply metal hydrides to heat storage devices and hydrogen storage devices. In this case, the metal hydride requires a pressure-resistant container because the reaction proceeds under hydrogen pressure. In addition, since metal hydrides have low thermal conductivity, metal hydrides can absorb heat efficiently, and
Taking into consideration the need to efficiently extract and utilize the heat generated from metal hydrides, the applicant first connected a pressure vessel filled with metal hydride and a heat exchanger with heat pipes. We proposed a metal hydride container consisting of interconnected metal hydride containers (
(See Japanese Patent Application Laid-Open No. 56-23667).

However, since this metal hydride utilization technology is a recent technology and is currently under development, there are still many points to be improved in the metal hydride container.

In other words, in the metal hydride container described above, the pressure-resistant container filled with metal hydride and the heat exchanger are connected by a heat pipe, so the overall shape is complicated and the volume is large, and the heat medium and metal There were problems such as poor heat transfer between hydrides and inefficient heat exchange.

OBJECTS OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and provide a metal hydride container that has good heat transfer efficiency between the metal hydride and the heat medium or can supply hydrogen uniformly.

Structure For this reason, the present invention integrates the container structure, which was conventionally separated into three parts: a pressure-resistant container, a heat vibrator, and a heat exchanger, by using a cylindrical body with a three-layer structure, and the outermost layer contains a heat medium. The intermediate layer is filled with metal hydride, and
The feature is that a heating medium is allowed to flow through the innermost layer.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, metal hydrides are dehydrogenated by heat and become metals,
In this specification, this case is also collectively referred to as metal hydride.

FIG. 1 shows a configuration diagram of a metal hydride container according to an embodiment of the present invention, in which (a) is a cross-sectional view thereof, and (b) is a cross-sectional view taken along the line A-A. In fig.

1.2.3 are three cylindrical tubes arranged coaxially.

These three cylindrical tubes 1, 2, 3 create three layers 4, 5, 6
is formed. Heat medium inlet/output conduits 7A, 7B and 8A, 8B are attached to the outermost layer 4 and innermost layer 6 to allow the heat medium to flow therethrough.

Further, the intermediate layer 5 is closed by closing plates 9 and 10 and filled with metal hydride, and in order to supply and recover hydrogen to the metal hydride, the closing plate 9 has hydrogen at its tip. A hydrogen inlet/outlet conduit 11 is attached which has a metal sintered filter section 11A that passes metal hydrides but not metal hydrides. Incidentally, the filter portion 11A may be provided to extend within the intermediate layer 5 along the axial direction.

With the above configuration, during heat storage, the heat medium is transferred to the outermost layer 4.0, taking into consideration the temperature distribution of the metal hydride layer. By flowing the innermost layer 6 at an optimum flow rate, heat is transferred to the metal hydride in the intermediate layer 5 on average. This causes a hydrogen dissociation reaction in the metal hydride, and the generated hydrogen is taken out from the hydrogen in/out conduit 11 and stored as chemical energy (hydrogen). On the other hand, during heat dissipation, the metal hydride absorbs hydrogen supplied from the filter section 11A of the hydrogen in/out conduit 11 and generates heat. This heat is transferred to the outermost layer 4. The heat is then transmitted to the innermost layer 6 and recovered by the heat medium flowing therethrough.

In this way, the metal hydride container has a three-layer internal structure,
A heating medium is allowed to flow through the outermost layer 4 and the innermost layer 6, while the intermediate layer 5 is filled with metal hydride to cause a hydrogen reaction, making it extremely compact and allowing it to be released to the outside world. A metal hydride container with extremely high heat transfer efficiency and low heat loss can be obtained.

Figure 2 shows another embodiment of the present invention, and Figure 1 (
It is a longitudinal cross-sectional view corresponding to b). In the figure, the same reference numerals as in FIG. 1 indicate the same or corresponding parts. The configuration shown in the figure differs from FIG. 1 in that fins 12 are provided between the cylindrical tubes 2 and 3 along the axial direction. In this way, heat transfer efficiency is further improved by attaching a plurality of fins 12 in the axial direction to the cylindrical tube 3 of the metal hydride container and dividing the intermediate layer 5 into a plurality of blocks. Moreover, the fins 12 enable uniform filling of the metal hydride and dispersion of pressure concentrations due to swelling.

By configuring the metal hydride container in this way, it can be made extremely compact as in the embodiment shown in FIG. 1, and hydrogenation and dehydrogenation within the metal hydride container can be uniform.

Moreover, it is carried out rapidly and the filled metal hydride can be effectively utilized.

3 and 4 show still another embodiment of the present invention, FIG. 3 is a longitudinal sectional view corresponding to FIG. 1(b), and FIG. 4 is a perspective view of an internal part of FIG. 3. The figure is shown below. In the figure, the same reference numerals as in FIGS. 1 and 2 indicate the same or corresponding parts.

As shown in FIG. 3, fins 13 are provided inside the cylindrical tube 2 of the metal hydride container along the axial direction within a range that does not contact the filter cylindrical tube 3, and the intermediate layer 5 is divided into a plurality of blocks. At this time, in order to securely fix the fins 13 with the intermediate layer 5, as shown in FIG. , both ends of the cylindrical tube 15 are closed by plates 9
．． 10 (see FIG. 1) to form a metal hydride container.

By configuring the metal hydride container in this way, the heat transfer efficiency between the heating medium and the metal hydride is further improved, and the effects of swelling due to volume changes of the metal hydride during the hydrogenation reaction can be dispersed. As a result, damage to the container due to stress changes caused by swelling can be prevented.

Effects As described above, according to the present invention, the container has a three-layer structure, the outermost layer is a heating medium path, the middle layer is filled with metal hydride, and the innermost layer is a heating medium path, so it is extremely compact. , a metal hydride container with high heat transfer efficiency can be obtained by reducing heat loss to the outside.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a metal hydride container according to an embodiment of the present invention, (a) is a cross-sectional view thereof, (b) is a cross-sectional view taken along line A-A, and FIG. 2 is a diagram showing another embodiment of the present invention. FIG. 1 (b) in Example
), FIG. 3 is a vertical cross-sectional view corresponding to FIG. 1(b) in yet another embodiment of the present invention, and FIG. 4 is a partial perspective view of the fin portion of FIG. 3. . 1.2.3...Cylindrical tube, 4...Outermost layer, 5...Middle layer, 6...Innermost layer, 7A, 7B, 8A, 8B...
・Heat medium inlet/outlet guide layer, 9, lO... Closing plate, 11... Hydrogen inlet/outlet conduit, 1], A... Filter part, 12.13.
... Fin, 14... Passage hole. 15...Cylindrical tube. Figure 1 (a) (b) Figure 2 Figure 3 Figure 4 Figure 1?

Claims (1)

[Claims] (1) Three cylindrical tubes are arranged coaxially to form a third layer cylinder, and a heat medium inlet/output conduit is provided in the outermost layer and innermost layer of the third layer tube, while the third layer tube A metal hydride container characterized in that a hydrogen inlet/output conduit is provided in an intermediate layer of the body, and a metal hydride is filled inside the intermediate layer. (2. Claim 1, characterized in that the intermediate layer is divided into a plurality of blocks by a plurality of fins provided in the direction of the cylinder axis, and a hydrogen inlet/output conduit is provided for each block. Metal hydride container.