KR100832851B1 - Latent heat storage type heat storage system for fuel cell using phase change materials - Google Patents

Abstract

A heat storage system for a fuel cell is provided to store the heat generated a fuel cell to use it, to minimize the system, and to allow warm water to be supplied stably with very small temperature change. A heat storage system(1) comprises a heat storage/radiation device(3) which is filled with a phase change material and comprises a fist heat transmission pipe(34) and a second heat transmission pipe(35) arranged between the phase change material by a certain interval to circulate the phase change material; a heat exchanger(21) which transmits the heat generated at a fuel cell system; a heat transmission path(2) which transmits the heat transmitting material heated at the fuel cell system to the heat exchanger by a first pump(22); a heat transmission circulation path(4) which is connected with the entrance/exit of the first heat transmission pipe to circulate the heat transmitting material to the heat exchanger and the first heat transmission pipe by a second pump(41) and transmits the heat to the phase change material; and a water supply path(5a) which is connected with the entrance/exit of the second heat transmission pipe to supply water to the second heat transmission pipe and to discharges the heat transmitted from the phase change material as warm water.

Description

Latent heat storage type heat storage system for fuel cell using phase change materials}

1 is a schematic view showing a heat storage system for a conventional fuel cell

2 is a block diagram of a conventional fuel cell system and a heat storage system

3 is a schematic diagram according to a first embodiment of the present invention

4 is a schematic diagram according to a second embodiment of the present invention;

5 is a schematic view according to a third embodiment of the present invention

6 is a schematic diagram according to a fourth embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: fuel cell system

2: heat transfer furnace

21: heat exchanger 22: first pump

23 pump 24 flow meter

3: shaft / heat radiator

32: first three-way valve 33: second three-way valve

34: first heat transfer tube 35: second heat transfer tube

36: heat transfer pipe 37: heat transfer pipe

4: heat transfer circuit

41 second pump 42 flow meter

43: third three-way valve 44: fourth third-way valve

5a: water supply passage 5b: hot water discharge passage

7: heat dissipation furnace

71: radiator

8: heat transfer furnace

81: heat exchanger

9: hot water storage tank

91: piping

The present invention relates to a heat storage system for a fuel cell, which will be described in more detail. The problem is that the volume of the heat storage system for storing heat generated from the fuel cell in the form of hot water is quite large, and also convection of water and effective heat therein. The present invention relates to a heat storage system for fuel cells developed to solve a problem of difficulty in preservation.

A fuel cell refers to a cell that directly converts chemical energy of a gas into electrical energy by oxidation and reduction of fuel and oxygen. Unlike a chemical cell, a fuel cell is continuously supplied with reactants from outside and reaction products are removed.

The most representative type of fuel cell is hydrogen-oxygen fuel cell, and fuel cell is divided into high temperature type and low temperature type according to operating temperature.

Since the oxidation reaction (for example, the reaction between hydrogen and oxygen) in the fuel cell is exothermic, heat is generated, and a cogeneration system using the same is used in the process of removing the reacting heat, and a representative example is hot water supply or heating system. Can be mentioned.

1 is a schematic view showing a heat storage system for a conventional fuel cell, Figure 2 is a block diagram of a conventional fuel cell system and a heat storage system. As shown in FIG. 1, in the conventional fuel cell system, a heat transfer path 8 for transferring heat generated in the fuel cell system 1 is circulated through a heat exchanger 81, and a pressurized heat storage tank 9 is provided. Water is circulated by the connected heat transfer circulation path 91 and receives heat through the heat exchanger 81 and is stored in the form of hot water in the heat storage tank. The hot water stored in the heat storage tank is discharged when necessary, and cold water is introduced from the water supply source and heated again in the above-described method.

This conventional configuration has a problem that it is impossible to install such a heat storage system in a narrow space because the size of the pressurized heat storage tank 9 is very large. 2 shows that the heat storage system occupies a relatively large volume compared to the fuel cell system.

In addition, when no hot water is used during continuous operation of the fuel cell, inflow of city water is essential for cooling the fuel cell system.In the absence of inflow of water, system efficiency due to an increase in operating temperature of the fuel cell system and Decrease in life may occur.

On the contrary, when the fuel cell system is not operated, overall heat loss occurs due to convection of water in the heat storage tank, which makes the use of hot water impossible or constitutes an additional auxiliary heat source for using the hot water. .

In general, in the case of a large-capacity heat storage tank used as a heat storage tank of a fuel cell, after about half of the hot water is supplied to the heat storage tank, the temperature of the hot water drops sharply, thereby preventing the function of the water heater. The reason is that the temperature of the hot water is significantly lowered as the direct water introduced from the water supply is diluted with the hot water.

The present invention was developed to solve the above problems, the object of which is to build a heat storage system using a phase conversion material to miniaturize the heat storage system.

In addition, since the temperature change of the produced hot water is minimized, it is possible to supply hot water at a stable temperature and to ensure the stability of the fuel cell system by maintaining a constant temperature of the water flowing into the fuel cell system.

Heat storage system for a fuel cell of the present invention for achieving the above object,

In the fuel cell heat storage system that is connected to the fuel cell system to store and utilize the heat generated from the fuel cell,

A shaft / heat dissipation device including a first heat transfer tube and a second heat transfer tube filled with a phase change material and circulated at regular intervals between the phase change materials;

A heat exchanger transferring heat generated by the fuel cell system;

A heat transfer path in which a heat transfer material heated in a fuel cell system transfers heat to the heat exchanger by a first pump;

A heat transfer circuit connected to each inlet / outlet of the first heat transfer tube of the shaft / heat radiator, wherein a heat transfer material circulates through the heat exchanger and the first heat transfer tube by a second pump, and transfers heat to the phase change material; ; And

A hot water supply passage connected to each inlet / outlet of the second heat transfer tube of the shaft / heat radiator, wherein water is supplied to the second heat transfer tube to receive heat from the phase change material and be discharged as hot water;

Characterized in that it comprises a.

According to the present invention, since the water heated through the heat exchanger and the water introduced from the water supply source do not mix with each other, it is possible to solve the problems occurring in the above-described conventional heat storage tank, thereby enabling continuous and stable hot water supply, There is no need for a large heat storage tank for storage, significantly reducing the size of the heat storage system.

In addition, another fuel cell heat storage system of the present invention,

In the fuel cell heat storage system that is connected to the fuel cell system to store and utilize the heat generated from the fuel cell,

A shaft / heat dissipation device including a first heat transfer tube and a second heat transfer tube filled with a phase change material and circulated at regular intervals between the phase change materials;

A heat transfer circuit connected to the inlet / outlet of the first heat transfer tube of the shaft / heat radiator, wherein a heat transfer material circulates through the first heat transfer tube and the fuel cell system by a pump and transfers heat to the phase change material; And

A hot water supply passage connected to each inlet / outlet of the second heat transfer tube of the shaft / heat radiator, wherein water is supplied to the second heat transfer tube to receive heat from the phase change material and be discharged as hot water;

Characterized in that it comprises a.

The present invention does not require a heat exchanger to further reduce the size of the system, the heat transfer process can be made without the medium of the heat exchanger can maximize the heat transfer efficiency and increase the heat storage rate.

In addition, another fuel cell heat storage system of the present invention,

In the fuel cell heat storage system that is connected to the fuel cell system to store and utilize the heat generated from the fuel cell,

A shaft / heat dissipation device including a heat transfer tube filled with a phase change material and circulated at regular intervals between the phase change materials to circulate the entire phase change material;

A heat exchanger transferring heat generated by the fuel cell system;

A heat transfer path in which a heat transfer material heated in a fuel cell system transfers heat to the heat exchanger by a first pump;

A heat transfer circuit connected to a heat transfer tube of the shaft / heat radiator, wherein water circulates through the heat exchanger and the heat transfer tube by a second pump and transfers heat to the phase change material;

A first three-way valve and a second three-way valve respectively installed at the inlet / outlet side heat transfer circulation paths of the heat transfer pipe;

A third three-way valve and a fourth three-way valve respectively installed in a heat transfer circuit connected between the first and second three-way valves and the heat exchanger;

A hot water discharge passage and a water supply passage connected to the first three-way valve and the second three-way valve, respectively;

A heat dissipation path connected to the third three-way valve and the fourth three-way valve, respectively; And

A radiator installed in the radiating path;

Characterized in that it comprises a.

In the present invention, by the first to fourth three-way valve,

During the heat storage, the supplied water circulates between the heat exchanger and the heat transfer tube to transfer heat to the phase change material.

When hot water is used, water is circulated between the heat exchanger and the radiator to release heat, and water supplied to the water supply path receives heat from the phase change material through the heat transfer pipe and is discharged to the hot water discharge path. do.

According to the present invention, the axial / heat dissipation path can be used as a single pipe in the axial / heat dissipation device, so that the structure of the axial / heat dissipation device can be simplified and reduced in size. It is also possible to recover and utilize heat released while preventing overheating of the battery system.

In addition, another fuel cell heat storage system of the present invention,

In the fuel cell heat storage system that is connected to the fuel cell system to store and utilize the heat generated from the fuel cell,

Axial / heat radiator made of a thermally conductive material and a plurality of heat transfer pipes filled with a phase change material therein;

A heat exchanger transferring heat generated by the fuel cell system;

A heat transfer path in which a heat transfer material heated in a fuel cell system transfers heat to the heat exchanger by a first pump;

A heat transfer circulation circuit connected to the shaft / heat radiator and configured to circulate the heat exchanger with water by a second pump; And

A water supply path through which water is supplied to the shaft / heat radiator, and a hot water discharge path through which hot water is discharged from the shaft / heat radiator;

Characterized in that it comprises a.

In the case of the present invention, it is possible to reduce the amount of phase change material used, and has the advantage of easy replacement of the partial phase change material.

Accordingly, the configuration of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce. Like reference numerals in the drawings denote components that perform the same function.

3 is a schematic diagram according to a first embodiment of the present invention, in the fuel cell heat storage system connected to the fuel cell system 1 to store and utilize heat generated from the fuel cell,

A shaft / heat sink comprising a first heat transfer tube 34 and a second heat transfer tube 35 respectively filled with a phase change material and circulated at regular intervals between the phase change materials to circulate the entire phase change material. (3);

A heat exchanger 21 transferring heat generated from the fuel cell system;

A heat transfer furnace 2 through which the heat transfer material heated in the fuel cell system transfers heat to the heat exchanger 21 by the first pump 22;

Respectively connected to the inlet / outlet of the first heat transfer tube 34 of the shaft / heat radiator 3, and the heat transfer material circulates through the heat exchanger 21 and the first heat transfer tube 34 by the second pump 41. Heat transfer circuits (4, 34) for transferring heat to the phase change material; And

Hot water that is connected to the inlet / outlet of the second heat transfer tube 35 of the shaft / heat radiator 3, respectively, is supplied with water to the second heat transfer tube 35, receives heat from the phase change material, and is discharged as hot water. Supply passages 5a, 35, 5b;

Represented a heat storage system for a fuel cell comprising a.

In this embodiment, the heat generated from the fuel cell is received through the first heat transfer tube 34 and stored in latent heat in Phase Change Materials (PCM), and when the hot water is used, the phase change material is transferred to the second heat transfer tube. It is a heat storage system that transfers latent heat to the water passing through 35 to discharge it to hot water.

Phase change material (PCM) refers to the heat transfer between the substance itself and its object, focusing on the heat transfer in the stage where the liquid is solid, gaseous, or solid is liquid, gaseous, and gas is solid. It refers to a material having a function of exchanging and giving a role, and is referred to as a latent heat material, a heat storage material, a heat storage material and a heat regulating material. The phase change material (PCM) releases or absorbs energy corresponding to the energy difference of each phase before and after the change in the latent phase process.

The principle of the heat storage system using the phase change material is that the phase change material absorbs the heat of fusion as the phase changes from a solid to a liquid at a certain temperature or higher, and stores it in the form of latent heat. As the phase changes to a state, the latent heat stored in the surroundings is used.

In the present invention, a material capable of phase change between 0 ° C. and 100 ° C. in which water is present may be used, and a material which phase changes into a solid / liquid phase at such a temperature is preferable.

This phase change material is filled in the heat / radiation device in the form of capsules or panels. In the present invention, it is preferable to connect an openable valve to the phase change material storage panel so that the phase change material can be replaced without opening / closing the axial / heat radiating device.

In addition, it is preferable that the phase change material storage panels are continuously arranged so as to maintain a constant interval therebetween so that the heat sources accumulated in the phase change material storage panels are well conducted when cold water is introduced, so that they can be used as heating or hot water supply.

On the other hand, it is also possible to laminate the phase change material in the axis / heat dissipation device of the present invention by laminating in multiple layers using different phase change materials. As an example, a high temperature phase change material layer may be laminated on an upper layer, and a low temperature phase change material layer may be laminated on a lower layer. Using this method, even if the heat energy is saturated, it is possible to prevent overheating of the fuel cell through heat transfer using another phase change material layer.

The configuration of the phase change material filled in the axial / heat radiating device of the present invention described above can be equally applied to the following second to fourth embodiments.

In the present embodiment, the axial heat-radiating device is arranged to circulate the entire phase conversion material by circulating the first heat transfer pipe 34 and the second heat transfer pipe 35 at regular intervals between the filled phase change materials. The pipes forming the first heat transfer pipe 34 and the second heat transfer pipe 35 are preferably formed to be meandered so as to extend as long as possible, and are preferably arranged to pass the entire phase change material at a predetermined interval.

As described above, the present embodiment provides a new heat storage system that separates the heat storage path and the heat radiation path. That is, the heat transfer circulation paths 4 and 34 through which the water heated through the heat exchanger circulates, and the hot water supply paths 5a, 35 and 5b in which water is introduced and discharged into hot water are separated.

Therefore, in the present embodiment, since the water heated through the heat exchanger and the water introduced from the water supply source do not mix with each other, it is possible to solve the problem caused by the mixing of hot water and direct water in the aforementioned conventional heat storage tank, thereby providing a stable hot water supply. It is possible.

In addition, by using the heat storage device of the present embodiment, there is no need for a large-capacity heat storage tank for storing hot water in the related art, which can drastically reduce the size of the heat storage system. According to a practical experiment, the size of the system can be reduced to about 1/2, even considering the volume of the axial / heat radiating device to contain a sufficient amount of phase change material for stable hot water supply.

Referring to the principle of the hot water supply according to the present embodiment according to the configuration shown in Figure 3, the heat generated from the fuel cell is used to heat the heat exchanger 21 by a heat transfer material (generally water is used) circulating the heat transfer path (2) It is transferred to the heat transfer material circulating through the heat transfer circuit 4, and heat is transferred to the phase change material while the heat transfer material passes through the first heat transfer pipe 34. At this time, the phase change material is stored in the latent heat form while causing a phase change from the solid phase to the liquid phase.

When hot water is supplied, water is supplied to the second heat transfer pipe 35 of the shaft / heat radiator 3 to receive heat from the phase change material, and is converted into hot water and discharged. At this time, the phase change material is to discharge the stored latent heat to the water flowing through the second heat transfer pipe 35 while causing a phase change from the liquid phase to the solid phase.

As described above, the present invention increases the temperature of the cold water flowing into the axial / heat radiating device by using latent heat stored therein by using a phase change material, so that the temperature of the hot water does not suddenly drop, and thus, a lot of hot water continuously is used. I can supply it.

4 is a schematic diagram according to a second embodiment of the present invention, in the fuel cell heat storage system, which is connected to the fuel cell system 1 and stores and utilizes heat generated from the fuel cell,

A shaft / heat sink comprising a first heat transfer tube 34 and a second heat transfer tube 35 respectively filled with a phase change material and circulated at regular intervals between the phase change materials to circulate the entire phase change material. (3);

Respectively connected to the inlet / outlet of the first heat transfer tube 34 of the shaft / heat radiator 3, and the heat transfer material circulates through the first heat transfer tube 34 and the fuel cell system 1 by the pump 23. A heat transfer circuit 4 for transferring heat to the phase change material; And

The hot water supply is connected to the inlet / outlet of the second heat transfer pipe 35 of the shaft / heat dissipation device 3, respectively, and water is supplied to the second heat transfer pipe 35 to receive heat from the phase change material and discharged into hot water. Furnaces 5a, 35, 5b;

Represents a heat storage system for a fuel cell comprising a.

The basic configuration of the present embodiment is the same as that of the heat storage system of the first embodiment described above, and is characterized in that heat is directly transferred from the fuel cell system 1 to the shaft / heat radiating device 3 without a separate heat exchanger. That is, the heat transfer circulation paths 4 and 34 circulate between the fuel cell system 1 and the heat / radiation device 3.

In this second embodiment, first, the heat exchanger is not necessary, so that the size of the system can be further reduced, and the heat transfer process can be performed without the medium of the heat exchanger to maximize the heat transfer efficiency. In addition, as the heat transfer efficiency is increased, the heat storage rate is increased, thereby reducing the time taken to supply hot water.

However, when the use of hot water is not frequent, the fuel cell may be overheated when the heat energy is saturated, and this problem uses a different phase change material as a phase change material of the heat storage system. This can be solved by laminating in multiple layers.

5 is a schematic diagram according to a third embodiment of the present invention, in the fuel cell heat storage system, which is connected to the fuel cell system 1 and stores and utilizes heat generated from the fuel cell,

An axis / heat dissipation device 3 including a heat transfer tube 36 filled with a phase change material and circulated at regular intervals between the phase change materials to circulate the entire phase change material;

A heat exchanger 21 transferring heat generated by the fuel cell system 1;

A heat transfer path 2 through which the heat transfer material heated in the fuel cell system 1 transfers heat to the heat exchanger 21 by the first pump 22;

It is connected to the inlet / outlet of the heat transfer tube 36 of the shaft / heat radiator 3 respectively, and the water circulates through the heat exchanger 21 and the heat transfer tube 36 by the second pump 41 and heats up to the phase change material. Heat transfer circuits 4 and 36 for transmitting the heat transfer paths;

A first three-way valve 32 and a second three-way valve 33 respectively provided at the inlet / outlet side heat transfer circulation paths 4 of the heat transfer pipe 36;

A third three-way valve 43 and a fourth three-way valve 44 respectively installed in the heat transfer circulation path 4 connected between the first and second three-way valves 32 and 33 and the heat exchanger 21;

A hot water discharge passage 5b and a water supply passage 5a respectively connected to the first three-way valve 32 and the second three-way valve 33;

A heat dissipation path 7 connected to the third three-way valve 43 and the fourth three-way valve 44, respectively; And

A radiator 71 installed in the radiating path 7;

Represents a heat storage system for a fuel cell comprising a.

Unlike the first and second embodiments, the present embodiment is characterized in that the heat storage path and the heat dissipation path are used in the heat storage device 3 in the same way. In order to adjust the path (when hot water is used), three-way valves are provided in the inlet / outlet side heat transfer circulation paths 4 of the shaft / heat radiator 3, respectively.

In addition, during the use of hot water (heat dissipation), the water heated through the heat exchanger 21 is circulated to a separate circulation path equipped with a radiator (heat exchanger) to utilize the extra heat. That is, the three-way valves 43 and 44 are respectively installed in the heat transfer circuits 4 connected between the first and second three-way valves 32 and 33 and the heat exchanger 21, so that the heat transfer circuits 21 are provided. Are respectively connected to the heat dissipation path 7 connected to the radiator 71.

In this embodiment, the path for supplying heat to the phase change material of the shaft / heat radiator 3 and the path for the phase change material of the shaft / heat radiator 3 to release heat to generate hot water are first to first. 4 By the operation of the three-way valve (32, 33, 43, 44) is formed as follows.

First, during the heat storage, the supplied water circulates between the heat exchanger 21 and the heat transfer tube 36 to transfer heat to the phase change material in the heat storage device / heat radiator 3. )

Next, when hot water is used, water is circulated between the heat exchanger 21 and the radiator 71 to release heat (4 and 7 paths in FIG. 5), and the water supplied to the water supply path 5a is a heat transfer tube ( 36) receives heat from the phase change material in the shaft / heat radiator 3 and discharges it to the hot water discharge path 5b (paths 5a, 36, and 5b of FIG. 5).

In addition, in the present embodiment, the heat dissipation furnace 7 is preferably used as a path for recovering excess heat by circulating the heated water from the heat exchanger 21 even when the latent heat is regenerated as much as possible without using hot water.

In the present embodiment, the radiator 71 is a kind of heat exchanger that recovers the heat transferred from the heat exchanger 21 when using hot water through the radiator 71 to be used for other purposes.

According to this embodiment, it is possible to use the axial / heat dissipation path as a single tube in the axial / heat dissipation device, so that the structure of the axial / heat dissipation device can be simplified and the size can be reduced. It is also possible to recover and utilize heat released while preventing overheating of the fuel cell system.

This embodiment has the advantage that the operation of the fuel cell system is stable to supply hot water while securing the cooling of the fuel cell first.

6 is a schematic diagram according to a fourth embodiment of the present invention, in the fuel cell heat storage system connected to the fuel cell system 1 to store and utilize heat generated from the fuel cell,

A shaft / heat sink 3 made of a thermally conductive material and in which a plurality of heat transfer pipes 37 filled with a phase change material are integrated therein;

A heat exchanger 21 transferring heat generated from the fuel cell system;

A heat transfer furnace 2 through which the heat transfer material heated in the fuel cell system transfers heat to the heat exchanger 21 by the first pump 22;

A heat transfer circulation path 4 connected to the shaft / heat radiator 3 and through which water circulates through the heat exchanger 21 by the second pump 41;

A water supply path 5a through which water is supplied to the shaft / heat radiator 3 and a hot water discharge path 5b through which hot water is discharged from the shaft / heat radiator 3;

Represents a heat storage system for a fuel cell comprising a.

In this embodiment, a heat transfer pipe 37 filled with a phase change material is integrated and disposed inside the shaft / heat radiating device 3, and water is filled around it.

In other words, unlike the first to third embodiments, heat storage and heat dissipation occur as water passes outside the heat transfer pipe filled with the phase change material. In this case, the heat transfer pipe is preferably formed of a material having good thermal conductivity, and thermally conductive plastic or metal material may be used.

In this embodiment, the amount of phase change material used is reduced, and partial replacement of phase change material is easy.

In addition to the fuel cell, the heat storage system of the present invention described above may use another heat generating system as a heat supply source, and the field of use as the heat storage system is considerably wider.

As described above, an optimal embodiment has been disclosed in the drawings and the specification. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

According to the present invention described above, by using the axial / heat dissipation system using the latent heat of the phase change material, it has the advantage that the system can be miniaturized to a significantly smaller size than the system using a conventional heat storage tank.

In addition, by heating the hot water by the latent heat of the phase change material, it is possible to supply a stable hot water with a very small temperature change.

In addition, since there is no convection of water inside the heat storage system, it is possible to use the accumulated heat without heat loss and to maintain the temperature of the coolant flowing into the fuel cell system at a constant temperature, thereby improving the performance and life of the fuel cell system. You will be able to import.

Claims (5)

In the fuel cell heat storage system that is connected to the fuel cell system to store and utilize the heat generated from the fuel cell, A shaft / heat dissipation device including a first heat transfer tube and a second heat transfer tube filled with a phase change material and circulated at regular intervals between the phase change materials to circulate the entire phase change material; A heat exchanger transferring heat generated by the fuel cell system; A heat transfer path in which a heat transfer material heated in a fuel cell system transfers heat to the heat exchanger by a first pump; A heat transfer circuit connected to each inlet / outlet of the first heat transfer tube of the shaft / heat radiator, wherein a heat transfer material circulates through the heat exchanger and the first heat transfer tube by a second pump, and transfers heat to the phase change material; ; And A hot water supply passage connected to each inlet / outlet of the second heat transfer tube of the shaft / heat radiator, wherein water is supplied to the second heat transfer tube to receive heat from the phase change material and be discharged as hot water; Heat storage system for a fuel cell comprising a. In the fuel cell heat storage system that is connected to the fuel cell system to store and utilize the heat generated from the fuel cell, A shaft / heat dissipation device including a first heat transfer tube and a second heat transfer tube filled with a phase change material and circulated at regular intervals between the phase change materials; A heat transfer circuit connected to the inlet / outlet of the first heat transfer tube of the shaft / heat radiator, wherein a heat transfer material circulates through the first heat transfer tube and the fuel cell system by a pump and transfers heat to the phase change material; And A hot water supply passage connected to each inlet / outlet of the second heat transfer tube of the shaft / heat radiator, wherein water is supplied to the second heat transfer tube to receive heat from the phase change material and be discharged as hot water; Heat storage system for a fuel cell comprising a. In the fuel cell heat storage system that is connected to the fuel cell system to store and utilize the heat generated from the fuel cell, A shaft / heat dissipation device including a heat transfer tube filled with a phase change material and circulated at regular intervals between the phase change materials to circulate the entire phase change material; A heat exchanger transferring heat generated by the fuel cell system; A heat transfer path in which a heat transfer material heated in a fuel cell system transfers heat to the heat exchanger by a first pump; A heat transfer circuit connected to the heat transfer tube of the shaft / heat radiator, wherein water circulates through the heat exchanger and the heat transfer tube by a second pump and transfers heat to the phase change material; A first three-way valve and a second three-way valve respectively installed at the inlet / outlet side heat transfer circulation paths of the heat transfer pipe; A third three-way valve and a fourth three-way valve respectively installed in a heat transfer circuit connected between the first and second three-way valves and the heat exchanger; A hot water discharge passage and a water supply passage connected to the first three-way valve and the second three-way valve, respectively; A heat dissipation path connected to the third three-way valve and the fourth three-way valve, respectively; And A radiator installed in the radiating path; Heat storage system for a fuel cell comprising a. The method according to claim 3, By the first to fourth three-way valve, During the heat storage, the supplied water circulates between the heat exchanger and the heat transfer tube to transfer heat to the phase change material. When hot water is used, water is circulated between the heat exchanger and the radiator to release heat, and the water supplied to the water supply path receives heat from the phase change material through the heat transfer pipe and is discharged to the hot water discharge path. A heat storage system for a fuel cell, characterized in that. In the fuel cell heat storage system that is connected to the fuel cell system to store and utilize the heat generated from the fuel cell, Axial / heat radiator made of a thermally conductive material and a plurality of heat transfer pipes filled with a phase change material therein; A heat exchanger transferring heat generated by the fuel cell system; A heat transfer path in which a heat transfer material heated in a fuel cell system transfers heat to the heat exchanger by a first pump; A heat transfer circulation circuit connected to the shaft / heat radiator and configured to circulate the heat exchanger with water by a second pump; And A water supply path through which water is supplied to the shaft / heat radiator, and a hot water discharge path through which hot water is discharged from the shaft / heat radiator; Heat storage system for a fuel cell comprising a.

Images