JPH07243717A - Hydrogen absorbing alloy heat pump - Google Patents

Abstract

PURPOSE:To to simultaneously obtain a high temperature heat source and a low temperature heat source by effecting absorption heat generation in a heat exchanger containing one of four hydrogen absorbing alloys having the lowest hydrogen equilibrium pressure so as to obtain the high temperature heat source, and effecting decomposition heat absorption in a heat exchanger containing one of the four hydrogen absorbing alloys having the highest hydrogen equilibrium pressure to obtain the low temperature heat source. CONSTITUTION:The interior of a first chamber S1 of a first medium pressure hydrogen absorbing alloy heat exchanger R3 is heated so that hydrogen decomposed from a hydrogen absorbing alloy M2 flow through a hydrogen transfer pipe line L1 into a first low pressure hydrogen absorbing alloy heat exchanger R1 and is absorbed in a hydrogen absorbing alloy M1 in the heat exchanger R1 so as to effect absorption heat generation. The interior of a second chamber S2 of the first heat exchanger R3 as well as the first chamber S1 is cooled, and due to pressure reduction in the second chamber S2 the hydrogen from the first high pressure hydrogen absorbing alloy heat exchanger R5 is guided through a hydrogen transfer pipe L2 into the second chamber S2 of the heat exchanger R3. A hydrogen absorbing alloy M4 in the first high pressure hydrogen absorbing alloy heat exchanger R5 is decomposed to effect decomposition heat absorption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrogen storage alloy heat pump using a hydrogen storage alloy.

[0002]

2. Description of the Related Art Recently, a hydrogen storage alloy heat pump has been developed which utilizes the absorption heat generated when hydrogen is absorbed in a hydrogen storage alloy and the decomposition heat absorption generated when hydrogen is released from the hydrogen storage alloy. Conventionally, as such a hydrogen storage alloy heat pump, one disclosed in, for example, Japanese Patent Laid-Open No. 1-305273 is known.

Conventionally, two types of heat pumps have been known as heat-driven heat pumps, namely, the temperature raising type heat pump shown in FIG. 6 and the increased temperature refrigerating type heat pump shown in FIG.

In the temperature raising type heat pump shown in FIG.
Two types of hydrogen storage alloys M1 and M2 with different equilibrium pressures are used.
This hydrogen storage alloy heat pump is used for
T occlusion alloy M2_MPyrolysis using a heat source of temperature
Introduce hydrogen into the elementary storage alloy M1 to cause storage heat.
The output of Q0 is generated by and after the reaction is completed, T _M
The heat source at the temperature of
Return hydrogen from storage alloy M1 to hydrogen storage alloy M2 (1) →
The cycle is (2) → (3) → (4).

Further, the temperature-enhancing refrigerating heat pump shown in FIG. 7 thermally decomposes the hydrogen storage alloy M1 using a heat source having a temperature of T _H to introduce hydrogen into the hydrogen storage alloy M2 to cause storage heat. Then, the hydrogen storage alloy M is heated by the heat source at the temperature of T _L.
2 is thermally decomposed to absorb Q0, and after the endothermic, the hydrogen is returned from the hydrogen storage alloy M2 to the hydrogen storage alloy M1 (1) → (2) → (3) → (4) cycle. ing.

On the other hand, conventionally, as shown in FIG. 8, in the environmental test room 11, it has been demanded to air-condition the room temperature to a low temperature of about −20 ° C., and such an air conditioner is used. The outside air needs to have a dew point temperature lower than the indoor temperature in order to prevent frost on the coil 15 surface of the air conditioner 13, and in order to dehumidify the outside air, for example, a honeycomb rotor dehumidifier 19 using a rotor 17 is used. Is used.

A steam or electric heater 21 is used as a heat source for regeneration, and a brunchler or the like is used as a heat source for cooling the environmental test chamber 11, and the coil 15 is used.
Is supplied with cold brine.

That is, in this type of room air conditioner, a low temperature heat source is required to cool the room, while a high temperature heat source is required to dehumidify.

[0009]

However, the conventional hydrogen storage alloy heat pump shown in FIGS. 6 and 7 has a problem that it is difficult to obtain a low temperature heat source and a high temperature heat source at the same time.

That is, in the temperature rising heat pump shown in FIG. 6, the storage heat generation Q0 of (2) can be used as a high temperature heat source, but the reaction in the low temperature field of (4) also causes storage heat generation Q3. , (4) cannot be effectively used as a low temperature heat source.

On the other hand, in the heat-enhanced freezing type heat pump shown in FIG. 7, the decomposition endotherm Q0 of (3) can be used as a low temperature heat source, but the reaction in the high temperature field of (1) also becomes the decomposition endotherm Q2. Therefore, there is a problem that (1) cannot be effectively used as a high temperature heat source.

The present invention has been made in order to solve the conventional problems, and provides a hydrogen storage alloy heat pump of a temperature rise refrigeration type capable of simultaneously obtaining a high temperature heat source in a high temperature field and a low temperature heat source in a low temperature field. The purpose is to do.

[0013]

The hydrogen storage alloy heat pump according to the present invention includes a first hydrogen storage alloy having the smallest hydrogen equilibrium pressure at the same temperature among four types of hydrogen storage alloys having different hydrogen equilibrium pressures. The second low-pressure hydrogen storage alloy heat exchanger and the hydrogen storage alloy having the second and third lowest hydrogen equilibrium pressures at the same temperature among the above-mentioned four types of hydrogen storage alloys pass through the heat transfer member to the first chamber and A first and a second intermediate pressure hydrogen storage alloy heat exchanger housed in the second chamber, and a first hydrogen storage alloy containing the largest hydrogen equilibrium pressure at the same temperature among the four types of hydrogen storage alloys And a first high pressure hydrogen storage alloy heat exchanger, a first intermediate pressure hydrogen storage alloy heat exchanger, the first chamber connecting the first chamber and the first low pressure hydrogen storage alloy heat exchanger. The hydrogen carrier line, and the first A second hydrogen transfer pipeline connecting the second chamber of the intermediate pressure hydrogen storage alloy heat exchanger to the first high pressure hydrogen storage alloy heat exchanger, and the second intermediate pressure hydrogen storage alloy heat exchange A third hydrogen transfer pipeline connecting the first chamber of the reactor with the second low pressure hydrogen storage alloy heat exchanger, and the second chamber of the second intermediate pressure hydrogen storage alloy heat exchanger A high temperature for extracting a high temperature heat source by heat exchange between a fourth hydrogen carrier pipe connecting the second high pressure hydrogen storage alloy heat exchanger and the first and second low pressure hydrogen storage alloy heat exchangers. A low-temperature heat source extraction line for extracting a low-temperature heat source by heat exchange between the heat source extraction line and the first and second high-pressure hydrogen storage alloy heat exchangers, the first low-pressure hydrogen storage alloy heat exchanger, and Removal of high-temperature heat source and low-temperature heat source from the first high-pressure hydrogen storage alloy heat exchanger During, and performs heating of the first chamber of the second low pressure hydrogen absorbing alloy heat exchanger and the first intermediate pressure hydrogen absorbing alloy heat exchanger,
When the high-temperature heat source and the low-temperature heat source are taken out from the second low-pressure hydrogen storage alloy heat exchanger and the second high-pressure hydrogen storage alloy heat exchanger, the first low-pressure hydrogen storage alloy heat exchanger and the second Means for heating the first chamber of the intermediate pressure hydrogen storage alloy heat exchanger, and a high temperature heat source from the first low pressure hydrogen storage alloy heat exchanger and the first high pressure hydrogen storage alloy heat exchanger And when the low temperature heat source is taken out, the second chamber and the second high pressure hydrogen storage alloy heat exchanger of the first intermediate pressure hydrogen storage alloy heat exchanger are cooled, and the second low pressure hydrogen storage alloy is stored. When the high temperature heat source and the low temperature heat source are taken out from the alloy heat exchanger and the second high pressure hydrogen storage alloy heat exchanger, the second chamber and the first high pressure of the second intermediate pressure hydrogen storage alloy heat exchanger are taken out. Hydrogen storage alloy heat exchanger And it has a cooling means for performing retirement.

[0014]

The function of the hydrogen storage alloy heat pump of the present invention is shown in FIG.
As shown in (4), four types of hydrogen storage alloys M1, M2, M3 and M4 having different hydrogen equilibrium pressures are used.

In FIG. 2, the horizontal axis represents the reciprocal of temperature and the vertical axis represents the hydrogen equilibrium pressure in natural logarithm.
In this heat pump, the high temperature heat source is taken out in the high temperature field by the occlusion heat generation of (2), and the low temperature heat source is taken out in the low temperature field by the decomposition heat absorption of (7).

Further, the decomposition endotherms of (1) and (3) are
(6) and (8) performed by heating by a heating means.
The occlusion heat generation of is performed by cooling by the cooling means. Furthermore, the decomposition heat absorption of (5) is performed by the heat quantity of the occlusion heat generation in (4).

That is, in the present invention, the high temperature heat source is taken out in a high temperature field by the heat generation of the hydrogen storage alloy in the low pressure hydrogen storage alloy heat exchanger in which the hydrogen storage alloy having the smallest hydrogen equilibrium pressure is stored at the same temperature. On the other hand, the low temperature heat source is taken out in the low temperature field by the decomposition and absorption of the hydrogen storage alloy in the high pressure hydrogen storage alloy heat exchanger in which the hydrogen storage alloy having the highest hydrogen equilibrium pressure is stored at the same temperature.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a hydrogen storage alloy heat pump of the present invention. In the figure, reference symbols R1 and R2 indicate four types of hydrogen storage alloys M1, M2, M3 having different hydrogen equilibrium pressures shown in FIG. The 1st and 2nd low pressure hydrogen storage alloy heat exchangers which accommodate the hydrogen storage alloy M1 with the smallest hydrogen equilibrium pressure among M4 are shown.

Further, reference numerals R3 and R4 denote hydrogen storage alloys M2 and M3 having the second and third lowest hydrogen equilibrium pressures at the same temperature among the four types of hydrogen storage alloys. The 1st and 2nd intermediate pressure hydrogen storage alloy heat exchanger accommodated in the chamber S1 and the 2nd chamber S2 is shown.

Further, symbols R5 and R6 indicate first and second high pressure hydrogen storage alloy heat exchangers in which the hydrogen storage alloy M4 having the largest hydrogen equilibrium pressure at the same temperature is accommodated.

The first chamber S1 of the first intermediate-pressure hydrogen storage alloy heat exchanger R3 and the first low-pressure hydrogen storage alloy heat exchanger R1 are connected by a first hydrogen transfer line L1. There is.

First intermediate pressure hydrogen storage alloy heat exchanger R3
Second chamber S2 and first high pressure hydrogen storage alloy heat exchanger R5
And are connected to each other by a second hydrogen transfer pipeline L2.
The first chamber S1 of the second intermediate pressure hydrogen storage alloy heat exchanger R4
The second low-pressure hydrogen storage alloy heat exchanger R2 and the second low-pressure hydrogen storage alloy heat exchanger R2 are connected by a third hydrogen-carrying pipeline L3.

Second intermediate pressure hydrogen storage alloy heat exchanger R4
Second chamber S2 and second high pressure hydrogen storage alloy heat exchanger R6
And are connected by a fourth hydrogen transfer pipeline L4.
Electromagnetic on-off valves V13 and V14 are arranged in the first hydrogen transfer pipeline L1 and the third hydrogen transfer pipeline L3, respectively.

The first and second low pressure hydrogen storage alloy heat exchangers R1 and R2 are provided with a high temperature heat source extraction line L5 for extracting a high temperature heat source by heat exchange with these heat exchangers.

Electromagnetic on-off valves V1 and V2 are arranged on the inlet side of the high temperature heat source extraction line L5 to the first and second low pressure hydrogen storage alloy heat exchangers R1 and R2. In addition, the first and second high pressure hydrogen storage alloy heat exchangers R5, R6
A low temperature heat source take-out pipe line L6 for taking out a low temperature heat source by heat exchange with these heat exchangers is arranged in the.

Electromagnetic on-off valves V3 and V4 are disposed on the inlet side of the low temperature heat source extraction line L6 to the first and second high pressure hydrogen storage alloy heat exchangers R5 and R6. First and second low pressure hydrogen storage alloy heat exchangers R1, R2 and first and second intermediate pressure hydrogen storage alloy heat exchangers R3
A heating pipe line L7 for supplying hot water from the boiler 50 is arranged in the first chamber S1 of R4.

The first and second low pressure hydrogen storage alloy heat exchangers R1 and R2 and the first heating pipe L7 and the first
And second intermediate pressure hydrogen storage alloy heat exchangers R3, R4
Electromagnetic on-off valves V5, V6, V7, and V8 are arranged on the inlet side and the outlet side of the first chamber S1, respectively.

A cooling tower 5 is provided in the second chamber S2 of the first and second intermediate pressure hydrogen storage alloy heat exchangers R3, R4 and the first and second high pressure hydrogen storage alloy heat exchangers R5, R6.
A cooling line L8 for supplying the cold water from 1 is arranged.

The downstream end of the cooling pipe L8 is connected to the boiler 5
0, and the downstream end of the above-described heating pipe line L7 is connected to the cooling tower 51. A circulation pump 53 is arranged in the cooling pipeline L8.

Then, the first and second intermediate pressure hydrogen storage alloy heat exchangers R3 and R4 in the cooling pipe L8 and the second chamber S2 and the first and second high pressure hydrogen storage alloy heat exchangers R5 and R5. Electromagnetic on-off valves V9, V10, V11, and V12 are arranged on the inlet side and the outlet side of R6, respectively.

In the figure, the symbol C indicates the electromagnetic opening / closing valves V1 to V1.
A control device, which is a switching means for opening and closing V14, is shown, and the control device C is connected with electric wires (not shown) to each of the electromagnetic opening / closing valves V1 to V14.

The above hydrogen storage alloy heat pump is operated by alternately repeating the first state shown in FIG. 3 and the second state shown in FIG. 4 with a predetermined time interval. That is, in the first state shown in FIG. 3, the high temperature heat source and the low temperature heat source are taken out from the first low pressure hydrogen storage alloy heat exchanger R1 and the first high pressure hydrogen storage alloy heat exchanger R5.

In this state, the control device C opens and closes the solenoid on-off valves V1 to V14 as shown in FIG. In FIG. 3, the white electromagnetic on-off valve shows an open state, and the black electromagnetic on-off valve shows a closed state.

In this first state, the inside of the first chamber S1 of the first intermediate pressure hydrogen storage alloy heat exchanger R3 is heated, hydrogen is decomposed from the hydrogen storage alloy M2, and the decomposed hydrogen is the first.
Of the hydrogen-carrying pipeline L1 into the first low-pressure hydrogen storage alloy heat exchanger R1 and hydrogen is stored in the hydrogen-storage alloy M1 in the first low-pressure hydrogen storage alloy heat exchanger R1 by the inflow of hydrogen. Then, the storage heat is generated (corresponding to (1) and (2) in FIG. 2).

The electromagnetic on-off valves V7 and V13 are closed when the hydrogen flow into the heat exchanger R1 is completed. In this first state, the second low pressure hydrogen storage alloy heat exchanger R
2 is heated, hydrogen is decomposed from the hydrogen storage alloy M1,
At the same time when the electromagnetic opening / closing valve V14 is opened, the decomposed hydrogen is returned to the first chamber S1 of the second intermediate pressure hydrogen storage alloy heat exchanger R4 from the third hydrogen transfer pipeline L3 ((3) in FIG. 2). , (4)).

Next, in this first state, the inside of the second chamber S2 of the first intermediate pressure hydrogen storage alloy heat exchanger R3 is cooled, and at the same time, the inside of the second chamber S1 is also cooled and the inside of the second chamber S2 is cooled. Due to the decrease in the pressure of H2, the hydrogen from the first high-pressure hydrogen storage alloy heat exchanger R5 is transferred from the second hydrogen transfer pipeline L2 to the first
Is guided to the second chamber S2 of the intermediate pressure hydrogen storage alloy heat exchanger R3, and thereby the first high pressure hydrogen storage alloy heat exchanger R
The hydrogen storage alloy M4 in 5 is decomposed and decomposition heat absorption is performed (corresponding to (6) and (7) in FIG. 2).

Further, in this first state, hydrogen is supplied into the first chamber S1 of the second intermediate pressure hydrogen storage alloy heat exchanger R4, and the storage heat of the hydrogen storage alloy M2 is carried out. The generated heat quantity is transferred to the second via the heat transfer member B.
The heat is transferred to the chamber S2, and the amount of this heat decomposes and absorbs the hydrogen storage alloy M3 in the second chamber S2 ((4) in FIG. 2,
(Corresponds to (5)).

On the other hand, the storage and exothermic reaction of the hydrogen storage alloy M1 in the first low pressure hydrogen storage alloy heat exchanger R1 and the decomposition and endothermic reaction of the hydrogen storage alloy M4 in the first high pressure hydrogen storage alloy heat exchanger R5 are one paragraph. Then, the control device C opens and closes the electromagnetic on-off valves V1 to V12, and switches to the second state shown in FIG.

In FIG. 4, the white electromagnetic on-off valve shows an open state, and the black electromagnetic on-off valve shows a closed state. In the second state shown in FIG. 4, the high temperature heat source and the low temperature heat source are taken out from the second low pressure hydrogen storage alloy heat exchanger R2 and the second high pressure hydrogen storage alloy heat exchanger R6.

In this second state, the inside of the first chamber S1 of the second intermediate pressure hydrogen storage alloy heat exchanger R4 is heated, hydrogen is decomposed from the hydrogen storage alloy M2, and the decomposed hydrogen is the third.
From the hydrogen transfer pipeline L3 into the second low pressure hydrogen storage alloy heat exchanger R2, and the hydrogen is stored in the hydrogen storage alloy M1 in the second low pressure hydrogen storage alloy heat exchanger R2 by the inflow of hydrogen. Then, the storage heat is generated (corresponding to (1) and (2) in FIG. 2).

The electromagnetic on-off valves V8 and V14 are closed when the hydrogen inflow into the heat exchanger R2 is completed. Also, in this second state, the first low pressure hydrogen storage alloy heat exchanger R
1 is heated, hydrogen is decomposed from the hydrogen storage alloy M1,
At the same time when the electromagnetic opening / closing valve V14 is opened, the decomposed hydrogen is returned to the first chamber S1 of the first intermediate pressure hydrogen storage alloy heat exchanger R3 from the first hydrogen transfer pipe L1 ((3) in FIG. 2). , (4)).

Next, in this second state, the inside of the second chamber S2 of the second intermediate pressure hydrogen storage alloy heat exchanger R4 is cooled, and at the same time, the inside of the second chamber S1 is cooled and the inside of the second chamber S2 is cooled. Due to the decrease in the pressure of H2, hydrogen from the second high-pressure hydrogen storage alloy heat exchanger R6 becomes
Is guided to the second chamber S2 of the intermediate pressure hydrogen storage alloy heat exchanger R4, and thereby the second high pressure hydrogen storage alloy heat exchanger R
The hydrogen storage alloy M4 in 6 is decomposed, and decomposition heat absorption is performed (corresponding to (6) and (7) in FIG. 2).

Further, in this second state, hydrogen is supplied into the first chamber S1 of the first intermediate pressure hydrogen storage alloy heat exchanger R3, and the storage heat of the hydrogen storage alloy M2 is generated. The generated heat quantity is transferred to the second via the heat transfer member B.
The heat is transferred to the chamber S2, and the amount of this heat decomposes and absorbs the hydrogen storage alloy M3 in the second chamber S2 ((4) in FIG. 2,
(Corresponds to (5)).

In the hydrogen storage alloy heat pump described above, however, the hydrogen equilibrium pressure as shown in FIG.
Of the hydrogen storage alloys M1, M2, M3, M4 of the kind, the hydrogen storage alloy M1 in the low pressure hydrogen storage alloy heat exchangers R1, R2 in which the hydrogen storage alloy M1 having the smallest hydrogen equilibrium pressure at the same temperature is stored. Due to storage heat, a high temperature heat source is taken out in a high temperature field, while decomposition of the hydrogen storage alloy M4 in the high pressure hydrogen storage alloy heat exchangers R5, R6 in which the hydrogen storage alloy M4 having the largest hydrogen equilibrium pressure is stored at the same temperature. Since the low temperature heat source is taken out in the low temperature field by the heat absorption, it is possible to obtain the high temperature heat source in the high temperature field and the low temperature heat source in the low temperature field at the same time.

By applying this hydrogen storage alloy heat pump to, for example, the environment test chamber shown in FIG. 8, it becomes possible to easily obtain a low temperature from a low temperature heat source without using a compressor, and to use steam or Since the regenerative heat source can be obtained from the high temperature heat source without using the electric heater, the COP (coefficient of performance) can be significantly improved as compared with the conventional case.

Further, since it is not necessary to use CFC gas, it is possible to eliminate the possibility of causing environmental damage. Further, in the hydrogen storage alloy heat pump described above, the first and second intermediate pressure hydrogen storage alloy heat exchangers R
The first chamber S1 and the second chamber S are provided by the heat transfer member B in R3 and R4.
2 is formed, and the hydrogen storage alloy M2 is contained in the first chamber and the hydrogen storage alloy M3 is contained in the second chamber, so that the first chamber S1 and the second chamber S
In 2, the heat quantity can be directly transferred, and the piping system of the hydrogen storage alloy heat pump can be simplified.

The downstream end of the cooling pipe L8 is connected to the boiler 5
Since it is connected to 0 and the downstream end of the heating pipeline L7 is connected to the cooling tower 51, the heat quantity of the fluid flowing through the cooling pipeline L8 and the heating pipeline L7 can be efficiently used.

In the embodiment described above, the example in which the compressor is not used has been described, but the present invention is not limited to such an embodiment, and for example, a compressor is used together as shown by a dotted line in FIG. By lowering the pressure in the high-pressure hydrogen storage alloy heat exchangers R5, R6, it is possible to obtain a lower temperature low temperature heat source.

Further, in the above-mentioned embodiment, an example in which a boiler is used for heating and a cooling tower is used for cooling has been described, but the present invention is not limited to such an embodiment. Waste heat or heat recovered from cogeneration may be used, or river water or the like may be used for cooling.

[0050]

As described above, in the hydrogen storage alloy heat pump of the present invention, four kinds of hydrogen storage alloys having different hydrogen equilibrium pressures are used, and the hydrogen storage alloy having the smallest hydrogen equilibrium pressure is accommodated at the same temperature. Inside the high pressure hydrogen storage alloy heat exchanger where the high temperature heat source is taken out by the storage heat of the hydrogen storage alloy in the low pressure hydrogen storage alloy heat exchanger, while the hydrogen storage alloy with the largest hydrogen equilibrium pressure is stored at the same temperature. Since the low-temperature heat source is taken out by the decomposition endotherm of the hydrogen storage alloy of No. 3, there is an advantage that the high-temperature heat source can be obtained in the high temperature field and the low temperature heat source can be obtained in the low temperature field at the same time.

[Brief description of drawings]

FIG. 1 is a piping system diagram showing an embodiment of a hydrogen storage alloy heat pump of the present invention.

FIG. 2 is an explanatory diagram showing the principle of the hydrogen storage alloy heat pump of the present invention.

FIG. 3 is a first view of the hydrogen storage alloy heat pump of FIG.
3 is a piping system diagram showing the operating state of FIG.

FIG. 4 is a second view of the hydrogen storage alloy heat pump of FIG.
3 is a piping system diagram showing the operating state of FIG.

FIG. 5 is an explanatory view showing an example in which a compressor is introduced into the hydrogen storage alloy heat pump of the present invention.

FIG. 6 is an explanatory diagram showing the principle of a conventional temperature rising heat pump.

FIG. 7 is an explanatory diagram showing the principle of a conventional heat-enhanced freezing type heat pump.

FIG. 8 is a piping system diagram showing a conventional air conditioner in an environmental test room.

[Explanation of symbols]

 R1 First low pressure hydrogen storage alloy heat exchanger R2 Second low pressure hydrogen storage alloy heat exchanger R3 First intermediate pressure hydrogen storage alloy heat exchanger R4 Second intermediate pressure hydrogen storage alloy heat exchanger R5 1 high pressure hydrogen storage alloy heat exchanger R6 2nd high pressure hydrogen storage alloy heat exchanger L1 1st hydrogen transfer pipeline L2 2nd hydrogen transfer pipeline L3 3rd hydrogen transfer pipeline L4 4th Hydrogen carrier pipeline L5 High temperature heat source extraction pipeline L6 Low temperature heat source extraction pipeline L7 Heating pipeline L8 Cooling pipeline V1 to V12 Electromagnetic on-off valve C Controller M1, M2, M3, M4 Hydrogen storage alloy

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[Procedure amendment]

[Submission date] May 16, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Figure 6]

[Figure 7]

[Fig. 2]

[Figure 3]

[Figure 5]

[Figure 8]

[Figure 4]

Claims (1)

[Claims] 1. A first and a second low-pressure hydrogen storage alloy heat exchangers, each accommodating a hydrogen storage alloy having the smallest hydrogen equilibrium pressure at the same temperature among four types of hydrogen storage alloys having different hydrogen equilibrium pressures, Of the four types of hydrogen storage alloys, the first and second hydrogen storage alloys having the second and third hydrogen equilibrium pressures at the same temperature are housed in the first chamber and the second chamber via the heat transfer member. An intermediate pressure hydrogen storage alloy heat exchanger, and first and second high pressure hydrogen storage alloy heat exchangers accommodating the hydrogen storage alloy having the largest hydrogen equilibrium pressure at the same temperature among the four types of hydrogen storage alloys A first hydrogen transfer pipeline connecting the first chamber of the first intermediate pressure hydrogen storage alloy heat exchanger to the first low pressure hydrogen storage alloy heat exchanger, the first intermediate pressure The second chamber of the hydrogen storage alloy heat exchanger and the above A second hydrogen carrier pipe connecting the high pressure hydrogen storage alloy heat exchanger of No. 1; the first chamber and the second low pressure hydrogen storage alloy of the second intermediate pressure hydrogen storage alloy heat exchanger; A third hydrogen carrying pipe line connecting to a heat exchanger is connected to the second chamber of the second intermediate pressure hydrogen storage alloy heat exchanger and the second high pressure hydrogen storage alloy heat exchanger. A high-temperature heat source take-out line for taking out a high-temperature heat source by heat exchange between a fourth hydrogen-carrying pipeline and the first and second low-pressure hydrogen storage alloy heat exchangers; and the first and second high-pressure hydrogen A low-temperature heat source extraction pipe for extracting a low-temperature heat source by heat exchange with the storage alloy heat exchanger, a high-temperature heat source from the first low-pressure hydrogen storage alloy heat exchanger and the first high-pressure hydrogen storage alloy heat exchanger, and At the time of taking out the low temperature heat source, the second low pressure hydrogen storage alloy heat exchanger Spare the first intermediate pressure hydrogen absorbing alloy heat exchanger first
While heating the chamber, at the time of taking out the high-temperature heat source and the low-temperature heat source from the second low-pressure hydrogen storage alloy heat exchanger and the second high-pressure hydrogen storage alloy heat exchanger, the first
Heating means for heating the first chamber of the low-pressure hydrogen storage alloy heat exchanger and the second intermediate-pressure hydrogen storage alloy heat exchanger, and the first low-pressure hydrogen storage alloy heat exchanger and the first Cooling of the second chamber of the first intermediate pressure hydrogen storage alloy heat exchanger and the second high pressure hydrogen storage alloy heat exchanger when the high temperature heat source and the low temperature heat source are taken out from the high pressure hydrogen storage alloy heat exchanger And at the time of taking out the high temperature heat source and the low temperature heat source from the second low pressure hydrogen storage alloy heat exchanger and the second high pressure hydrogen storage alloy heat exchanger, the second intermediate pressure hydrogen storage alloy heat exchange And a cooling means for cooling the second chamber of the vessel and the first high-pressure hydrogen storage alloy heat exchanger.