JPH066961U - Hydrogen storage body storage unit in hydrogen storage / release heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to quickly occlude or release hydrogen into or from a hydrogen occluding body, and prevent nonuniformity.
Increase heat exchange efficiency. A collar portion 4b formed on the outer peripheral edge of each fin 4 in which a plurality of fins 4 are housed at a plurality of locations inside the tube 1 so as to be oriented in the radial direction of the tube and at predetermined intervals in the axial direction. Is brought into contact with the inner peripheral surface of the tube 1.
Further, the cylindrical filter 5 is inserted into the central hole 4c formed in each fin 4, and each fin 4 is formed with a hole 4a for filling the hydrogen absorbing body 6 between the fins 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hydrogen storage body storage unit in a hydrogen storage / release heat exchange device in which one of a pair of heat exchangers incorporating a hydrogen storage body releases hydrogen and the other stores the released hydrogen.

[0002]

[Prior art]

 In a heat exchange device that utilizes the release and storage of hydrogen, the transfer of hydrogen from one heat exchanger to the other heat exchanger is mainly performed using a compressor. Hydrogen release from the hydrogen storage body of one heat exchanger is promoted by the suction action of the compressor, and the released hydrogen is stored in the hydrogen storage body of the other heat exchanger by the pressurizing action of the compressor. Further, the release of hydrogen is an endothermic process, and the cooling water is cooled by this endothermic process. On the contrary, hydrogen absorption is an exothermic process, and the heating water heats the heating water.

As a hydrogen storage body storage unit of a heat exchange device, a unit as shown in FIGS. 5 and 6 has been conventionally proposed. In this unit, a front end plate 2 and a rear end plate 3 are joined and fixed to both front and rear ends of a tube 1. As shown in FIG. 6, a star fin 15 having a radial cross section is housed inside the tube 1, and a hydrogen storage alloy (body) 6 is filled between the star fin 15 and the inner peripheral surface of the tube 1. It is being touched.

Further, the front end plate 2 is integrally formed with a hydrogen inlet / outlet pipe 2a, and a filter 16 is provided at an inner end portion of the pipe 2a. The filter 16 prevents the hydrogen storage alloy 6 from flowing out.

Further, although not shown in the drawing, the hydrogen storage body storage unit configured as described above stores a plurality of heat storage cases in a heat exchanger case, and water contained in the case as a heat exchange medium is stored in a tube. It comes in contact with the outer peripheral surface of 1.

[0006]

[Problems to be solved by the device]

 However, in the hydrogen storage body storage unit described above, since the tip end edge 15a of the radial portion of the star fin 15 is in linear contact with the axial direction of the tube 1, contact between the tip end edge 15a and the inner peripheral surface of the tube 1 occurs. There is a problem that the area, that is, the heat transfer area is reduced and the heat exchange efficiency is reduced.

Further, since no hydrogen flow path is secured inside the tube 1, hydrogen flows into and out of the hydrogen storage alloy 6 as it goes from the filter 16 on the hydrogen inlet / outlet pipe 2a side to the rear end plate 3 side. There is a problem in that the heat exchange efficiency cannot be improved due to lack of sufficient reaction rate and non-uniformity.

Although it is possible to increase the contact area with the tube 1 by increasing the number of radial portions of the star fins 15, in this case, in order to secure the same contact area, the fin 15 has a large volume. Since it increases, the problem that the filling amount of the hydrogen storage alloy 6 becomes small occurs.

An object of the present invention is to solve the above-mentioned problems existing in the prior art, to quickly store or release hydrogen in the hydrogen storage body, prevent nonuniformity, and prevent heat generation. It is an object of the present invention to provide a hydrogen storage body storage unit in a hydrogen storage / release type heat exchange device capable of enhancing exchange efficiency.

Another object of the present invention is to provide a hydrogen storage body storage unit in a hydrogen storage / release heat exchange device, which can further improve heat exchange efficiency.

[0011]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the invention according to claim 1 accommodates a plurality of fins inside the tube in a plurality of locations so as to be oriented in the radial direction of the tube and at predetermined intervals in the axial direction. The outer peripheral part of the fin is brought into contact with the inner peripheral surface of the tube, and a cylindrical filter for hydrogen transfer is axially attached to each fin, and a hydrogen storage material is inserted between each fin in each fin. The means of forming holes for filling is used.

The invention according to claim 2 is the device according to claim 1, wherein the outer peripheral portion of each fin is provided with a collar portion that is bent in the axial direction and comes into contact with the inner peripheral surface of the tube. .

[0013]

[Action]

 The invention according to claim 1 accommodates a plurality of fins inside the tube in a plurality of locations at a predetermined interval in the axial direction so as to be oriented in the radial direction of the tube, and the outer peripheral portion of each fin is the inner circumference of the tube. Since they contact the surface, the contact area between them increases without increasing the number of fins, and the heat transfer efficiency improves.

In the device according to the first aspect of the present invention, the tubular filter for transferring hydrogen is inserted in the tube in the axial direction of the tube. It is uniformly occluded or released and heat exchange efficiency is improved.

According to the second aspect of the invention, since the collar portion that bends in the axial direction is provided on the outer peripheral portion of each fin to contact the inner peripheral surface of the tube, the contact area between the fin and the tube is further increased, and the area between the two is increased. The heat transfer efficiency is further improved, and the heat exchange efficiency can be further improved.

[0016]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a front end plate 2 and a rear end plate 3 are joined and fixed to both front and rear (left and right) end surfaces of a tube 1 having a cylindrical shape. A large number of fins 4 made of a metal such as aluminum having a high heat transfer coefficient are housed inside the tube 1, and each fin 4 has at least a small hole 4a for filling the hydrogen storage alloy 6. It is formed in one place. A collar portion 4b is curvedly formed on the outer peripheral portion of each fin 4, and the outer peripheral surface of the collar portion 4b is in contact with the inner peripheral surface of the tube 1.

In addition, a cylindrical metal sintered filter 5 made of, for example, copper is inserted and supported in the center hole 4c formed in the center of the fin 4. Hydrogen is introduced into the filter 5 from the hydrogen inlet / outlet pipe 2a of the front end plate 2 provided corresponding to the front end (left in FIG. 1) opening of the filter 5. A hydrogen storage alloy 6 is filled between the fins 4 through the small holes 4a with the front end plate 2 or the rear end plate 3 removed from the tube 1.

The hydrogen storage alloy storage unit 7 configured as described above is used by being stored in a plurality of locations inside the heat exchanger case 8 as shown in FIG. The hydrogen derivation / introduction pipes 2a of the respective storage units 7 are integrated into one pipe line (not shown) outside the case 8. In addition, a flow passage 9 through which water as a heat exchange medium passes is formed in the exchanger case 8.

The two heat exchangers 10 thus configured are connected to each other as a set by the pipe line (not shown), and a compressor (not shown) is interposed on the way of the pipe line, and Is moved from one heat exchanger 10 to the other heat exchanger 10. Also, a switching mechanism for switching the feed direction of this compressor is installed.

Therefore, when the compressor is activated in FIG. 1 and hydrogen is supplied into the filter 5 from the hydrogen inlet / outlet pipe 2 a, the hydrogen passes through the filter 5 and is stored in the hydrogen storage alloy 6, and the alloy 6 is a metal hydride. At this time, the hydrogen storage alloy 6 is in a heat generation process of releasing heat, so this heat is transmitted from the many fins 4 to the tube 1 through the collar portion 4b, and the tube 1 and the heat exchanger case 8 are transferred. It is transmitted to the water inside and used for heating.

Further, in the process of releasing hydrogen to the other heat exchanger 10 by the compressor in a state where hydrogen is stored in the hydrogen storage alloy 6, it becomes an endothermic process, and the heat of the water in the exchanger case 8 is reduced. It is absorbed by the storage alloy 6 from the tube 1 through the fins 4 and is used for cooling.

In this invention, as shown in FIG. 1, a large number of fins 4 are accommodated in the tube 1 so as to be oriented in the radial direction and at a predetermined interval in the axial direction of the tube 1. Without increasing, the contact area between the outer peripheral surface of the fin 4 and the inner peripheral surface of the tube 1 can be increased, and the heat transfer efficiency between them can be improved.

In addition, in the above-mentioned embodiment, since the central hole 4c is formed in each fin 4 and the cylindrical filter 5 is inserted, hydrogen is not absorbed in any part of the hydrogen storage alloy 6 in the longitudinal direction of the tube 1. The heat exchange efficiency can be improved by occluding or releasing almost simultaneously and uniformly.

As shown in FIG. 4, in the above-mentioned embodiment, the longer the elapsed time in the hydrogen storage process, the more rapidly the atomic ratio (mol) of hydrogen storage alloy 6 and hydrogen increased, whereas star fin was used. In the conventional example, the rate of increase is gradual, and it can be seen that the heat exchange efficiency is low.

In the above-described embodiment, the collar portion 4b is formed on the outer peripheral portion of each fin 4, but in this case, the contact area between the fin 4 and the tube 1 is further increased to improve the heat transfer efficiency and the heat exchange efficiency. Can be further improved.

The present invention is not limited to the above embodiment, but can be embodied as follows. (1) Instead of the small holes 4a formed in each fin 4, the diameter of the central hole 4c is made larger than the outer diameter of the filter 5, and the gap (not shown) is filled with the hydrogen storage alloy 6. Make it a hole for use.

(2) To omit the collar portion 4b of the fin 4. Also in this case, since the outer peripheral portion of each fin 4 contacts the inner peripheral surface of the tube 1, the contact area between the fin 4 and the tube 1 is smaller than that of the conventional example using the star fin. The filling amount can be increased without decreasing.

[0028]

[Effect of device]

 As described in detail above, the device according to claim 1 accommodates a plurality of fins inside the tube in a plurality of positions so as to be oriented in the radial direction of the tube and at predetermined intervals in the axial direction. Since the outer peripheral part of the tube contacts the inner peripheral surface of the tube and the cylindrical filter is axially inserted through each fin, hydrogen can be absorbed or released into or from the hydrogen storage material quickly. It is possible to prevent evenness and improve heat exchange efficiency.

In the invention of claim 2, since the collar is provided on the outer circumference of the fin, the contact area between the fin and the tube is increased, and the heat exchange efficiency is further improved as compared with the invention of claim 1. can do.

[Brief description of drawings]

FIG. 1 is a sectional view of a hydrogen storage alloy storage unit showing an embodiment embodying the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a cross-sectional view of a heat exchanger.

FIG. 4 is a graph showing a relationship between an elapsed time in a hydrogen storage process and an atomic ratio.

FIG. 5 is a sectional view of a conventional hydrogen storage alloy storage unit.

6 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

1 tube, 2 front end plate, 3 rear end plate, 4 fins, 4a small hole, 4b collar part, 4c center hole, 5 metal sintered (cylindrical) filter,
6 Hydrogen storage (body) alloy, 7 Storage unit.

Claims (2)

[Scope of utility model registration request] 1. A plurality of fins are housed inside a tube so as to be oriented in the radial direction of the tube and are housed at a plurality of locations at predetermined intervals in the axial direction, and the outer peripheral portion of each fin is the inner peripheral surface of the tube. In addition to making contact with each other, a cylindrical filter for transferring hydrogen was axially attached to each fin, and each fin was provided with a hole for filling a hydrogen absorbing body between the fins. Hydrogen storage body storage unit in the exchange device. 2. The hydrogen storage body storage unit in a hydrogen storage / release heat exchange device according to claim 1, wherein a collar portion is formed on an outer peripheral portion of each fin so as to be bent in an axial direction and contact an inner peripheral surface of the tube. .