JPS6026899A - Metallic hydride vessel with fin-plate - Google Patents

Abstract

PURPOSE:To secure such a metallic hydride vessel as being excellent in heat exchanging efficiency, by forming more than one inner fins and outer fins projecting inside and outside a pipe each by means of solid molding. CONSTITUTION:Each of metallic hydride vessels 11 and 11' is provided with plural fins 13 and 13' projecting its cylindrical pipe parts 12 and 12' in a centripetal state from a pipe inner wall in long platelike form in the longitudinal direction of a pipe as well as projecting as becoming a radial pair from a pipe outer wall. This fin-plate cylindrical type pipe is manufactured into solid molding by means of a direct extrusion process or the like. With this constitution, both thermal contact areas between a metallic hydride and the metallic hydride vessel as well as the metallic hydride vessel and a thermal medium are further increased, thus heat exchange is efficiently performable.

Description

Detailed Description of the Invention (a) Industrial Application Field This invention relates to a metal hydride container used in a heat storage device.
Specifically, the present invention relates to a finned metal hydride container in which a cylindrical metal aqueous compound container body is provided with one or more plate-shaped fins that are long in the length direction of the pipe and protrude from the inner and outer walls of the pipe.

(b) Conventional technology As a heat storage device using a metal hydride container, an example of the metal hydride container is shown in FIG.
A plurality of metal hydride containers (1
) (1') (1'') installed in a heat exchanger (2) filled with a circulating heat medium (3) is generally used. Hy
drogenEneroy Conference,
1-3 March, 1976゜Miami 3ea
ch,Flortda,ConferenceProc
eedings Vol. III, 7cm22). In such a multitubular heat storage device, since the thermal conductivity of metal hydride is low, it is necessary to use thin tubes in order to efficiently exchange heat. In order to increase the thermal contact area between this thin tube and the metal hydride filled inside, a thermally conductive internal fin (8) as shown in Fig. 2 is inserted into the cylindrical pipe section (9). Method of filling metal hydride (
Fig. 3 shows a cross-sectional view of a cylindrical pipe section obtained by this method), but it has the disadvantage that heat loss occurs at the contact point between the inner wall of the thin tube and the internal fin.

(c) Purpose of the Invention The present invention was made in order to improve the above-mentioned problems, and its object is to provide a metal hydride container that can efficiently exchange heat.

(D) Structure of the Invention This invention consists of a cylindrical pipe filled with a metal hydride and a closing member that closes openings at both ends of the pipe.The closing member has a hydrogen inlet/output pipe having an on-off valve, although hydrogen can pass therethrough. The object of the present invention is to provide a finned metal hydride container in which one or more internal and external fins are formed integrally with a wall through which the metal hydride cannot pass, and one or more internal and external fins protrude from the external wall to the inside and outside of the pipe, respectively. .

The metal hydride container of the present invention is characterized in that the main body of the container is an integrally molded product in the form of a cylindrical pipe with fins added as described above.

Among these fins, the internal fins are those that protrude centripetally (those that protrude at an inclination rather than a flat fin are also included in the present invention. Furthermore, the present invention includes external fins that do not protrude radially, but that protrude at an angle. Furthermore, the present invention includes not only those in which the inner and outer fins form a pair and protrude from the same location on the pipe wall, but also those in which they protrude from different locations.

Further, the ratio of the total surface area of each of the inner and outer fins is set in relation to the heat transfer coefficient between the inner and outer fins and the metal hydride or heat medium so that heat can be smoothly and efficiently transferred between the inside and outside.

It is also used as the main part of the metal hydride container of this invention.

(e) Examples This invention will be explained by examples, but this invention is not limited to the following.

FIG. 4 is a vertical sectional view including a partial side view of a heat storage device using a finned metal hydride container (11) (It') according to an embodiment of the present invention, and FIG. FIG. 2 is a cross-sectional view taken along A-A- of the heat storage device shown in the figure.

The metal hydride container opening 11 (11') has a cylindrical pipe portion 0z side that is shaped like a long plate in the length direction of the pipe and emits radiation from the outer wall of the pipe centripetally from the inner wall of the pipe into the pipe. A plurality of fins 03) which protrude in pairs, respectively.
It has a surface. The openings at both ends of the cylindrical pipe part (+2) av are closed by closing members (15a, 15b) (15=
a, '15-b), and one of the closing members (15a) and (15-a) is equipped with a hydrogen inlet/output pipe (16106'l) with an on-off valve, at one end of which hydrogen can pass, but metal A porous partition body 08) 081 through which hydrides cannot pass is installed, and metal hydride 08) is introduced into the cylindrical pipe section +12) (12') through this partition body.
Filled with 410/IU.

The heat storage device shown in FIGS. 4 and 5 performs heat exchange using metallic hydrogen.

First, during heat storage, thermal energy is transferred from the heat medium (to) to the metal hydride container (111 (11')) to heat the metal hydride 04 (G4') in the same container,
The generated hydrogen gas passes through the porous partition body 081081, passes through the opened on-off valve 07) 07'l, is led to a hydrogen cylinder (not shown) by the hydrogen inlet/output conduit 06) 06'l, and is stored. Ru.

On the other hand, during heat dissipation, hydrogen gas from a hydrogen cylinder, etc. passes through the opened on-off valve surface 07 and passes through the hydrogen inlet/output conduit 06)06.
It further passes through the porous compartment 08) 08], contacts the metal hydride and reacts, and the generated heat is transferred through the metal hydride container (ill [1+'l) to the heat exchanger (13).
and heats the heat medium (@), and that heat is used.

If the above-mentioned metal hydride container is used, the fins are provided on the cylindrical part of the container, so the thermal contact area between the metal hydride and the metal hydride container, and between the metal hydride container and the heat medium is increased, allowing heat exchange. can be carried out efficiently, and such a finned cylindrical body has the advantage that it can be integrally molded.

Furthermore, a metal hydride container (31) according to another embodiment of the present invention
'(31'') A partial side view of the heat storage device with (31'')
3) (3'3'), but what is different from what is marked in red in Figures 4 and 5 is a porous compartment (18) (a cylindrical compartment with a bottom (38) instead of 181). '(38'). This metal hydride container (31) (31'
), it is possible to more smoothly move hydrogen gas in and out.

(F) Effects of the Invention According to the finned hydride container of the present invention, efficient heat exchange can be performed, and the finned cylindrical portion is
It has the advantage of being able to be integrally molded into a single piece.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view of an example of a heat storage device using a conventional metal hydride container, Figure 2 is a perspective view of an example of internal fins, and Figure 3 shows the internal fins of Figure 2 connected to metal hydride in a cylindrical pipe. 4 is a longitudinal sectional view of a heat storage device using a metal hydride container according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view of the device shown in FIG. 6 is a longitudinal sectional view of a heat storage device using a metal hydride container according to another embodiment of the present invention, and FIG. 7 is a lateral sectional view at B- and B- of the device of FIG. 6. be. 03)03] (33) (3'3-)...
Fin, (8)...Internal fin, +7)+7) (7″) 00)04)041 (34
) (34=)...Metal hydride, (15a) (15b,') (is-a) (1
5-b) (35a,)<35b>(35-a>
(35-b > −・・−・−closure plate, +4) (4
tsu (4″) [161(ni”hj (36) (3
6-)...Hydrogen inlet and outlet pipes, (5) [5') (5'') (17) 07 (37)
(37-)...Opening/closing valve, (6)(ω(6″>
081 (18 (38) (38-)... Porous compartment, and (3) (E) (40)... Heat medium. Director of the Agency of Industrial Science and Technology 4At'rt!#person Hirobe Kawada

Claims (1)

[Scope of Claims] 1. Consists of a cylindrical pipe filled with metal hydride and a closing member that closes openings at both ends of the pipe, and on the other hand, hydrogen passes through a hydrogen inlet/outlet guard having an on-off valve in the interlocking member. A metal hydride container is installed in a cylindrical pipe so that it communicates with the inside of the cylindrical pipe through a compartment body through which the metal hydride can pass through. A finned metal hydride container comprising one or more internal and external fins that are integrally formed and project from the internal and external walls of the pipe to the inside and outside of the pipe, respectively. 2. The container according to claim 1, wherein the inner fins are formed to project centrially from the inner wall of the pipe, and the outer fins are formed to project radially from the outer wall of the pipe. 3. The container according to claim 1 or 2, wherein the internal fins and the external fins are formed in pairs so as to protrude from the pipe wall in the same line.