JP2002130746A - Heat-storing device and its renewal method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-storing device for improving the heat exchange efficiency between a heat-storing material and refrigerant liquid 2 in a heat reservoir 30 and at the same time preventing a solution for generating a hydrate from being supercooled. SOLUTION: A large amount of heat storage is obtained by the latent heat of the hydrate in the heat reservoir 30, the efficiency in the heat exchange with the refrigerant liquid 2 is improved by flow behavior by allowing the hydrate to form slurry, a fine particle is sealed into the heat reservoir 30 for preventing the solution from being supercooled, and the solution is agitated by posture change or the like in the heat reservoir 30 for dispersing and floating the fine particle into the solution, thus preventing deterioration in the effect for preventing supercooling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus for storing heat by utilizing latent heat of a hydrate. More specifically, the present invention relates to a heat storage device in which a large number of heat storage bodies are immersed in a coolant liquid such as water, and an aqueous solution that generates a hydrate as a heat storage material is sealed in the heat storage bodies. The present invention also relates to a method of increasing the amount of heat storage when renewing (updating equipment) a heat storage device in a water heat storage type air conditioning system to increase its capacity.

[0002]

2. Description of the Related Art Conventionally, there has been a technique in which a large number of heat storage bodies are floated in water in a water tank in order to increase the amount of heat stored in a water tank for storing heat using sensible heat of water. Such a device has an advantage that the heat storage amount can be increased by using the existing heat storage water tank as it is.

As the above-mentioned heat storage body, for example, a heat storage material which solidifies at a solidification temperature of water, that is, 0 ° C. or higher, such as various waxes, is enclosed in a sealed container, and this heat storage material is solidified before water solidification. It solidifies and the amount of heat stored is increased by the latent heat.

However, when the heat storage material in the heat storage material is solidified, the heat storage material does not flow inside the heat storage material, and the heat conductivity of the solidified heat storage material is low. The heat exchange efficiency of the heat exchanger decreases.

[0005] In order to prevent such a problem, for example, there is a method of reducing the size of the heat storage container and increasing the surface area with respect to the volume. However, in this case, it is necessary to put an extremely large number of heat storage bodies in the water tank. Therefore, a large-sized water tank needs a huge number of heat storage bodies, and there is a problem that the manufacturing cost is increased.

Further, in the above-described water tank for heat storage, the temperature of the internal heat storage medium, that is, water, differs depending on various conditions. For example, the heat storage temperature in the water tank differs depending on the type of the refrigerator that cools the water in the water tank and the type of the heat load that uses the water in the water tank as a cold heat source.

However, a conventional heat storage material, such as wax, has a fixed coagulation temperature and cannot cope with the above heat storage temperature. Therefore, there is a restriction on the heat storage temperature of the water in the water tank.

Referring to FIG. 16, there is shown an example of a conventional water storage type air conditioning system installed in a building or a district heating / cooling system, for example, and renewal of the heat storage device will be described. The water storage type air conditioning system of FIG. 16 includes a storage tank 1 in which water 2 is stored as a refrigerant liquid. The water 2 in the storage tank 1 is supplied to the refrigerator (R-1,
R-2) It is cooled by 3a and 3b, and stores cold heat.
The water 2 in the storage tank 1 is supplied to an AHU (air heat exchanger) 8a.
To 8d, and the stored cold heat is exchanged with air to be used for cooling.

In such a water regenerative air conditioning system, when the demand for cooling air conditioning increases from the time of introduction, the refrigerators 3a and 3b are updated to have higher capacity. At this time, an increase in the amount of heat storage is also required. However, since it is difficult to add the storage tank 1 for storing water as the refrigerant liquid due to space restrictions, it is often impossible to increase the heat storage amount.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is intended to provide a heat storage device that stores heat by immersing a heat storage body in a coolant liquid such as water. Provided is a heat storage device that improves heat exchange efficiency with a refrigerant liquid by using a hydrate, has no restriction on the heat storage temperature of the refrigerant liquid, and prevents overcooling of an aqueous solution that generates the hydrate. Is what you do. Another object of the present invention is to provide a method for increasing the amount of heat storage without changing the size of a storage tank when renewing (updating) the heat storage amount of a heat storage device of a water heat storage type air conditioning system.

[0011]

According to a first aspect of the present invention, there is provided a storage tank for storing a refrigerant liquid, a refrigerator for cooling the refrigerant liquid, and a heat storage element immersed in the refrigerant liquid. Wherein the heat storage body is a hermetically sealed container, an aqueous solution filled in the hermetically sealed container to generate a hydrate, and a supercooling of the aqueous solution contained in the hermetically sealed container. And fine particles for preventing

Therefore, a large amount of heat storage can be obtained by the latent heat of this hydrate. In addition, this hydrate generally generates hydrate particles due to the swing of a floating hermetic container, etc., and produces a fluid hydrate slurry inside the hermetic container. There is. Therefore, the fluidity of the hydrate slurry improves the efficiency of heat exchange with a refrigerant liquid such as water. For this reason, the size of the container of this heat storage body can be enlarged, the number of heat storage bodies to be put into the storage tank can be reduced, and the manufacturing cost can be reduced.

Further, fine particles are sealed in the container, and the generation of hydrate particles is promoted by using these fine particles as nuclei, so that the supercooling of the aqueous solution is prevented. In addition, the aqueous solution in the heat storage container is agitated by a change in posture, such as swinging of a hermetically sealed container floating in the refrigerant liquid. The effect of prevention does not decrease.

Further, the present invention according to claim 2 is provided with a container driving means for causing the attitude change or movement of the container in the refrigerant liquid and dispersing the fine particles in the container. It is characterized by the following.

Therefore, without depending on spontaneous swings due to convection or the like of the refrigerant liquid, it is possible to surely change or move the position of the heat storage container, and to surely disperse and suspend the fine particles in the container in the aqueous solution. Thus, the occurrence of supercooling can be reliably prevented.

According to a third aspect of the present invention, the container driving means causes the refrigerant liquid in the storage tank to flow,
It is characterized by a flow mechanism that causes the attitude change or movement of the container by the flow of the refrigerant liquid. Therefore, the aqueous solution in the container is constantly stirred, and the fine particles do not precipitate, and the effect of preventing supercooling can be reliably maintained.

According to a fourth aspect of the present invention, the container driving means injects air into the refrigerant liquid in the storage tank, and changes the attitude of the container by rising air bubbles. Alternatively, it is an air injection mechanism that causes movement. Therefore, the aqueous solution in the container is constantly stirred, and the fine particles do not precipitate, and the effect of preventing supercooling can be reliably maintained.

According to a fifth aspect of the present invention, the container driving means is a mechanical drive mechanism for mechanically changing or moving the position of the heat storage container. . Therefore, the aqueous solution in the container is constantly stirred, and the fine particles do not precipitate, and the effect of preventing supercooling can be reliably maintained.

According to a sixth aspect of the present invention, the container of the heat storage body is free floating in the refrigerant liquid in the storage tank. Therefore, the structure is simple, and the heat storage amount can be easily increased simply by putting these heat storage bodies into an existing water tank for heat storage.

The present invention according to claim 7 is characterized in that the heat storage container is rotatably supported in the storage tank. Therefore, these heat storage bodies are stably supported and have high reliability.

The present invention according to claim 8 is characterized in that a vane member for promoting a change in the posture or movement of the container is provided outside the container of the heat storage element. is there. Therefore, the stirring of the internal aqueous solution becomes more efficient.

According to a ninth aspect of the present invention, the aqueous solution filled in the hermetically sealed container contains a guest compound whose hydrate formation temperature changes in accordance with the concentration of the aqueous solution. It is characterized by the following.

Therefore, by changing the concentration of the aqueous solution, the formation temperature of the hydrate can be changed, and the heat storage temperature of the cooling medium can be arbitrarily set. Therefore, for example, if the hydrate formation temperature is set high, it is not only used as a cold heat source for cooling such as cooling, but also on a snow melting road, a snow melting roof,
It can also be used as a cold source for heating, such as a warm storage warehouse for preventing freezing in cold regions.

The present invention according to claim 10 is characterized in that the fine particles are fine particles having a particle size of 10 μm or less. Fine particles having a particle size of 10 μm or less can be easily dispersed and suspended in an aqueous solution, so that the formation of hydrate particles with the fine particles as a nucleus is promoted and the effect of preventing supercooling is high.

Further, according to the present invention, the fine particles are fine particles having a particle size of 10 μm or less,
The concentration of fine particles in the aqueous solution is 0.1 mg / L or more. By mixing fine particles having a particle size of 10 μm or less so that the concentration in the aqueous solution becomes 0.1 mg / L or more, the fine particles are in good contact with the aqueous solution, and the formation of hydrate particles with the fine particles as nuclei is promoted. The effect of preventing supercooling is high.

Further, the present invention according to claim 12 is characterized in that the fine particles are fine particles having a particle size of 100 μm or less. Fine particles having a particle size of 100 μm or less can be easily dispersed and suspended by an appropriate dispersion mechanism for dispersing and suspending the fine particles in an aqueous solution.
The generation of hydrate particles is promoted with the fine particles as nuclei, thereby preventing supercooling.

According to a thirteenth aspect of the present invention, there is provided a method for renewing a heat storage device comprising a storage tank for storing a refrigerant liquid and a refrigerator for cooling the refrigerant liquid,
A hermetically sealed container, an aqueous solution that is filled in the hermetically sealed container to produce a hydrate by cooling, and fine particles that are contained in the hermetically sealed container and that prevent the aqueous solution from being supercooled. The heat storage element provided with the above is charged into the refrigerant liquid in the storage tank. in this way,
Since a large amount of heat storage can be obtained by the latent heat of the hydrate, the amount of heat storage can be increased without changing the size of the storage tank, and optimal operation of the system becomes possible.

According to a fourteenth aspect of the present invention, there is provided a method for renewing a heat storage device including a storage tank for storing a refrigerant liquid and a refrigerator for cooling the refrigerant liquid,
A unit containing a tube filled with an aqueous solution in which fine particles are dispersed by cooling to generate hydrates and prevent supercooling and a pump for circulating the aqueous solution in the tube is prepared, and the tube is stored in the above-described manner. It is characterized by being installed in a refrigerant liquid in a tank. Even with this method,
Since a large amount of heat storage can be obtained by the latent heat of the hydrate, the amount of heat storage can be increased without changing the size of the storage tank, and optimal operation of the system becomes possible.

[0029]

DETAILED DESCRIPTION OF THE INVENTION In producing a hydrate slurry,
In order to prevent supercooling, it is effective to disperse and suspend core particles serving as cores of hydrate particles in an aqueous solution. It is particularly effective to use fine particles having a particle diameter of 10 μm or less as fine particles serving as nuclei. Since such fine particles easily disperse and float in an aqueous solution, they become nuclei of hydrate particles and have an extremely high effect of preventing supercooling.

If the concentration of the fine particles having a particle size of 10 μm or less in the aqueous solution is 0.1 mg / L or more, the fine particles are in good contact with the aqueous solution and are effective in preventing supercooling. General tap water has a turbidity of 1 degree, which defines kaolin 1 mg / L as 1 degree, and industrial water has a degree of turbidity of about 20 degrees, and therefore contains fine particles at a concentration of 0.1 mg / L or more. By using tap water or industrial water as the water of the aqueous solution containing the guest compound, supercooling can be prevented.

When fine particles having a particle diameter of 100 μm or less are used as fine particles serving as nuclei, an effect of dispersing and suspending the fine particles in the aqueous solution by means of dispersing the fine particles in the aqueous solution to prevent supercooling. Is high. A suitable range for the concentration of the microparticles in the aqueous solution is from 1 mg / L to 5 g / L. If the concentration is higher than the upper limit, stagnation occurs in the sealed container, which is not preferable. If the concentration is lower than the lower limit, the effect of preventing supercooling is reduced.

An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, as a heat storage material sealed in a heat storage container, as a guest compound, for example, tetra-n-butylammonium salt (hereinafter referred to as TBAB)
Is an aqueous solution containing

In this TBAB aqueous solution, the hydrate formation temperature changes depending on the concentration, and the hydrate formation temperature increases as the concentration increases, and the hydrate formation temperature decreases as the concentration decreases. I do. Therefore, this TBA
If the concentration of the aqueous B solution is set low and the hydrate formation temperature, that is, the heat storage temperature, is set low, it can be used as a cold heat source suitable for cooling such as cooling. If the concentration of the aqueous solution is increased and the hydrate formation temperature is set higher, it can also be used as a heat source for heat retention such as a snowmelt road, a snowmelt roof, or a cold storage warehouse to prevent freezing in cold regions. be able to.

The aqueous solution of TBAB is, for example, about 1
Hydrate particles are formed at a temperature of 2 ° C. to form a hydrate slurry, but supercooling may occur. If supercooling occurs in this manner, hydrate particles cannot be generated unless the temperature is cooled to the above-mentioned temperature of 12 ° C. or lower, and the efficiency of the cooler is reduced. When this supercooling is released,
The generated hydrate may adhere to the wall surface of the container, or the generated hydrate particles may aggregate to lower the fluidity of the hydrate slurry.

As the above-mentioned guest compound, in addition to the above-mentioned TBAB, for example, a tetra-iso-amyl ammonium salt, a tetra-iso-butyl phosphonium salt, a tri-iso-amyl sulfonium salt and the like can be used.

FIGS. 1 and 2 show a first embodiment of the present invention. This device has a storage tank 1 in which a refrigerant liquid, for example, water 2 is stored. Reference numeral 3 denotes a refrigerator, and the water 2 in the storage tank 1 circulates between the refrigerator 3 via pipes 4 and 5, is cooled, and stores cold heat.

The water 2 in the storage tank 1 is supplied to a pipe 6,
The cooling heat which is circulated through a cooling load (not shown) such as an air conditioner via the air conditioner 7 and stored is used. In the water 2 inside the storage tank 1, a large number of heat storage bodies 30 are immersed in a floating state, so that the heat storage amount of the water 2 in the storage tank 1 is increased. The configuration of these heat storage bodies 30 will be described later.

The storage tank 1 is provided with a circulation mechanism 10 as a container driving means for changing the attitude of the heat storage body 30 or moving the same.
Is constituted by a pump 11, a nozzle 12, etc., and circulates the water 2 in the storage tank 1 to flow or stir.

At the bottom of the storage tank 1, an air injection mechanism 20 is provided as a container driving means for changing the attitude or movement of the heat storage body 30. The air injection mechanism 20 is composed of a high-pressure air source 21, a valve 22, a nozzle 23, and the like, injects air into the water from the bottom of the storage tank 1, and raises water bubbles inside the storage tank 1 by rising air bubbles. Stir 2

Next, the configuration of the heat storage unit 30 will be described with reference to FIG. The heat storage body 30 includes a spherical container 31 having a sealing property. An aqueous solution 32 containing TBAB is sealed in the container 31.

A predetermined amount of air or other gas is sealed in the container 31 to form a space, and the apparent specific gravity of the heat accumulator 30 is determined by the surrounding refrigerant liquid such as water. And is configured to be able to float freely in this water.

Instead of forming the space in which the gas is sealed as described above, an expandable ball-shaped or cylindrical gas container in which the gas is sealed is sealed in the container 31 of the heat storage body 30. The specific gravity of the entire heat storage body 30 may be adjusted. Further, by attaching fine particles to the outer surface of the gas container, generation of hydrate can be promoted.

The expansion or contraction of the space or the gas container can compensate for expansion and contraction of the aqueous solution 32 in the container 31 of the heat storage unit 30 and volume change due to hydrate formation. .

Further, inside the container 31, fine particles 33 are sealed in order to prevent the above solution from being supercooled. As the fine particles 33, for example, granulated slag is used, and those having a particle size that can be dispersed and suspended in the aqueous solution are used. The fine particles 33 have a sedimentation property, and precipitate in a long-term static state. In addition, this container 3
The hydrate particles generated with these fine particles 33 as nuclei in 1 are melted inside the container 31, and when the generation and melting of these hydrate particles are repeated, these fine particles 33 become
1 tends to be deposited on the inner surface.

In this embodiment, a pair of blade members 34 are protruded from the outer surface of the spherical container. These blade members 34 are mounted at different angles from each other, and when the surrounding water flows, resistance or lift generated on these blade members 34 causes the container 31 to rotate around the axis X, for example. Is configured.

Next, the operation of the apparatus of the first embodiment will be described. The refrigerator 3 is operated, for example, with surplus electric power at midnight, and stores the generated cold heat in the water 2 in the storage tank 1.

In this case, when the water 2 in the storage tank 1 is cooled, the aqueous solution 32 inside is cooled through the wall of the container 31 of the heat storage body 30 to produce hydrate particles, and hydrate particles are formed. A slurry is generated. When the water in the storage tank 1 is used as a cold heat source, the hydrate slurry inside the heat storage body 1 is melted, contrary to the above. As described above, the latent heat of the hydrate increases the heat storage amount.

Since the above hydrate slurry has fluidity, the efficiency of heat exchange with surrounding water is high. Further, since the fine particles 33 are mixed in the aqueous solution 32 in the container 31, the generation of hydrate particles is promoted by using the fine particles 33 as nuclei, and the supercooling of the aqueous solution is prevented.

As described above, the fine particles 33 tend to gradually accumulate or adhere to the inner surface of the container 31, so that the amount of the fine particles dispersed and suspended in the aqueous solution 32 decreases, and The effect of preventing cooling is reduced. However, as described above, the water in the storage tank 1 is
And the air injected by the air injection mechanism 20 is stirred by rising air bubbles. Therefore, the posture and the position of the heat storage body 30 change due to the flow and agitation of the water. Thereby, the aqueous solution 32 in the container 31 of the heat storage body 30 is stirred, and the fine particles 33 are dispersed and suspended in the aqueous solution 32. Therefore, the effect of preventing supercooling is maintained without lowering.

In order to promote the dispersion and floating of the fine particles 33 due to the change of the attitude and the movement of the heat storage container 31, it is effective to enclose a plurality of stirring weight pieces in the container 31. is there. Further, by providing a plurality of projections on the stirring weight piece or implanting hairs, stirring can be made more effective.

Further, ultrasonic waves or vibrations may be applied to the water 2 in the storage tank 1 and transmitted to the aqueous solution 32 in the heat storage unit 30 to promote the diffusion and floating of the fine particles 33. In addition, instead of the above-described ultrasonic waves and vibrations, the diffusion and floating of the fine particles 33 in the aqueous solution 32 can be promoted by a magnetic field, an electric field, or the like.

It is also effective to apply a treatment or coating that has an effect of preventing the fine particles from settling and adhering to the inner surface of the container 31. As this coating, for example, a film such as a fluororesin or a silicone resin can be used.

The present invention is not limited to the first embodiment. For example, FIG. 3 shows a heat storage body 30 according to a second embodiment of the present invention. In this case, the container 31 has a cylindrical shape and is rotatable about a central axis 36. A plurality of blade members 35 protrude radially from the peripheral surface of the cylindrical container 31. This is because the water flow or the rising air bubbles have the above-mentioned blade member 3.
5, the container 31 rotates.

The above embodiment has the same configuration as that of the first embodiment except for the above points.
The same reference numerals are given to portions corresponding to the above-described embodiment, and description thereof will be omitted.

FIG. 4 shows a heat storage unit 30 according to a third embodiment of the present invention, in which a blade member 37 corresponding to the blade member of the above-described second embodiment is attached at an angle. Things. In this embodiment, since the blade member 37 is inclined, the blade member 37 can be rotated only by a water flow from one direction.

The above embodiment has the same configuration as that of the first embodiment except for the above points.
The same reference numerals are given to portions corresponding to the above-described embodiment, and description thereof will be omitted.

FIG. 5 shows a heat storage unit 30 according to a fourth embodiment of the present invention. This is one in which a plurality of pocket-shaped concave portions 38 are formed in the outer peripheral portion of the container 31. In this embodiment, the air bubbles are rotated by the accumulation of air bubbles in the concave portions 38, and the air is discharged when the concave portions 38 face upward with the rotation, and the rotation is repeated and continued.

The above embodiment has the same configuration as that of the second embodiment except for the above points.
The same reference numerals are given to portions corresponding to the above-described embodiment, and description thereof will be omitted.

FIG. 6 shows a heat storage unit 30 according to a fifth embodiment of the present invention. In this embodiment, a blade member 39 protruding from the peripheral surface of a cylindrical container 31 is attached so as to be inclined with respect to the axial direction. This embodiment can also rotate about the central axis 36 by the flow from the axial direction indicated by the arrow A.

The above embodiment has the same configuration as the above second embodiment except for the above points.
The same reference numerals are given to portions corresponding to the above-described embodiment, and description thereof will be omitted.

FIG. 7 shows a heat storage unit 30 according to a sixth embodiment of the present invention. In this embodiment, a plurality of blade members 40 continuous in the axial direction are attached to be inclined in both the circumferential direction and the axial direction. In this embodiment, the central axis 3 is also affected by the flow from the axial direction indicated by the arrow A.
6 can be rotated.

The above embodiment has the same configuration as that of the third embodiment except for the above points.
The same reference numerals are given to portions corresponding to the above-described embodiment, and description thereof will be omitted.

FIG. 8 shows a heat storage unit 30 according to a seventh embodiment of the present invention and its driving means. In this apparatus, a strip 41 such as a string or a chain is wound around a cylindrical container 31, and the end of the strip 41 is moved up and down to rotate the container 31. In addition, a weight 42 for returning the container 31 to the original rotation position is attached inside the container 31.

The above embodiment has the same configuration as that of the third embodiment except for the above points.
The same reference numerals are given to portions corresponding to the above-described embodiment, and description thereof will be omitted.

FIG. 9 shows a heat storage device according to an eighth embodiment of the present invention. In this device, the inside of the storage tank 1 is partitioned by a plurality of substantially vertical partition walls 50, and between these partition walls 50, a cylindrical heat storage element 30 as used in the second embodiment is used.
Are rotatably supported. In addition, 5
1 is a water supply port, and 52 is a discharge port. An air supply pipe 53 is arranged at the bottom of the storage tank 1, and a number of nozzle holes 54 are formed in the air supply pipe 53. In this embodiment, air bubbles ejected from the nozzle holes 54 of the air supply pipe 53 rise between the partition walls 50 and rotate the heat storage bodies 30.

The above embodiment has the same configuration as that of the first embodiment except for the above points.
The same reference numerals are given to portions corresponding to the above-described embodiment, and description thereof will be omitted.

FIG. 10 schematically shows a heat storage device according to a ninth embodiment of the present invention. This is provided with a mechanical regenerator driving mechanism. That is, the heat storage body 30 of this embodiment has a cylindrical shape. The heat accumulators 30 are arranged in a group and are surrounded by a flexible endless traveling body 60 such as a strip such as a string or a belt such as a belt or a net. The endless running body 60 is run by a pulley 61 and each heat storage body 3
0 rotates.

The above-described embodiment has the same configuration as that of the first embodiment except for the above-described points. In FIG. 10, parts corresponding to those of the first embodiment are denoted by the same reference numerals. The description is omitted.

FIG. 11 and FIG. 12 show an aqueous solution stirring body used in the tenth embodiment of the present invention. The aqueous solution stirrer 70 is accommodated in, for example, a cylindrical heat storage container, and stirs the internal aqueous solution by rotating the container.

The aqueous solution stirrer 70 includes a cylindrical rod-shaped main body 71 made of a material such as metal, and a plurality of stirring members 72 protruding radially from the main body 71. And when the container of a heat storage body rotates, this aqueous solution stirring body 70 will roll in this container, and will stir an aqueous solution. In this embodiment, fine particles are attached to the surface of the aqueous solution stirring body 70, and the aqueous solution stirring body 70
When tumbling and stirring the aqueous solution, the fine particles on this surface come into contact with the aqueous solution one after another, thereby preventing overcooling.

If the aqueous solution stirring body 70 of this embodiment is used, it is not necessary to enclose the powdery fine particles in the container of the heat storage element. However, in order to increase the effect of preventing supercooling, this aqueous solution stirring Both the body 70 and the powdery fine particles may be encapsulated.

FIG. 13 shows a heat storage drive mechanism of the heat storage device according to the eleventh embodiment of the present invention. This is similar to the seventh embodiment shown in FIG. 8 described above, in which a plurality of heat storage bodies 3 are wound by a strip 75 wound around a cylindrical heat storage body 30.
One end of the strip 75 is attached to this fixed side, such as the wall of the storage tank 1, and the other end is wound around a rotation shaft 76.

In this embodiment, the rotation shaft 76 is used.
, The other end of each strip 75 reciprocates up and down, and each heat storage element 30 reciprocates. In this embodiment, since each heat storage element 30 is suspended and supported by the strip 75, a special mechanism for rotatably supporting these heat storage elements 30 is not required, and the structure is simple. .

The present invention is not limited to the above embodiments. For example, in the above embodiment, the container driving mechanism is provided. However, when using an existing heat storage water tank or the like, when water in the water tank flows for heat exchange or the like, or when convection and water level In the case where the container of the heat storage body naturally changes or moves due to fluctuations in the temperature or the like, it is not necessary to particularly provide such a container driving mechanism.

Next, a method of renewing a heat storage device of a water storage type air conditioning system installed in a building, a district heating / cooling system or the like according to the present invention will be described with reference to FIG. Note that, in FIG. 14, the portions corresponding to FIG. 16 are denoted by the same reference numerals.

First, the refrigerators (R-1, R-2) 3a, 3a
Update b from an existing one to a more capable one. On the other hand, the heat storage body 30 prepared separately is stored in the water 2 in the storage tank 1.
Put in. The heat storage unit 30 includes a hermetically sealed container, an aqueous solution that is filled in the hermetically sealed container to generate a hydrate by cooling, and fine particles that are contained in the hermetically sealed container and that prevent the aqueous solution from being supercooled. Is provided. The sealed container may be spherical (capsule) or cylindrical (tube), as shown in FIGS. 2 to 8, 11 and 12, for example. As the aqueous solution that produces a hydrate by cooling and the fine particles that prevent supercooling of the aqueous solution, those described above can be used.

If such a method is used, the refrigerator 3a,
When replacing 3b with a higher capacity, a large amount of heat storage can be obtained by the latent heat of the hydrate, so that the amount of heat storage can be increased without changing the size of the storage tank 1, and Optimal operation becomes possible. Further, even when the refrigerator is not updated, the heat storage amount can be increased.

Another method for renewing the heat storage device of the water storage type air conditioning system installed in a building, a district heating / cooling system, or the like according to the present invention will be described with reference to FIG. In FIG. 15, parts corresponding to those in FIG. 16 are denoted by the same reference numerals.

First, the refrigerators (R-1, R-2) 3a, 3a
Update b from an existing one to a more capable one. On the other hand, separately, a unit 100 including a tube 101 filled with an aqueous solution in which fine particles are dispersed by cooling to generate a hydrate to prevent supercooling, and a pump 102 for circulating the aqueous solution in the tube 101 is prepared. . The tube may be made of metal or resin. Further, although the tube forms a closed soup, it may be constituted by one tube or a plurality of tubes branched from one tube may be arranged in parallel. The tube 101 included in the unit 100 is transferred to the water 2 in the storage tank 1.
Install inside. Also in this case, the above-mentioned aqueous solution that produces a hydrate by cooling and the fine particles that prevent supercooling of the aqueous solution can be used.

Even in such a method, when the refrigerators 3a and 3b are updated to those having a high capacity, a large amount of heat storage can be obtained by the latent heat of the hydrate, so that the size of the storage tank 1 is changed. The amount of heat storage can be increased without the need, and optimal operation of the system becomes possible. Further, even when the refrigerator is not updated, the heat storage amount can be increased.

[0081]

As described above, according to the apparatus of the present invention, a large amount of heat can be obtained by the latent heat of the hydrate sealed in the heat accumulator.
In addition, since this hydrate forms a slurry and has fluidity, the efficiency of heat exchange with a refrigerant liquid such as water can be improved, the size of the heat storage container can be increased, and the heat storage to be charged into the storage tank. Fewer bodies are required, and manufacturing costs can be reduced. Also,
Since fine particles are sealed in this container, the generation of hydrate particles is promoted by using these fine particles as nuclei, so that supercooling of the aqueous solution is prevented. In addition, since the aqueous solution in the container of the heat storage is agitated due to a change in posture or the like, fine particles are dispersed and floated in the aqueous solution without settling, and the effect of preventing supercooling is not reduced. Is big. Furthermore, in the heat storage device of the water heat storage type air conditioning system, when the refrigerator is renewed (updated) to a higher capacity, by increasing the amount of heat storage without changing the size of the storage tank, the optimal operation of the system is improved. Will be possible.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a heat storage device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a heat storage body according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a heat storage body according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a heat storage body according to a third embodiment of the present invention.

FIG. 5 is a sectional view of a heat storage body according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view of a heat storage body according to a fifth embodiment of the present invention.

FIG. 7 is a perspective view of a heat storage body according to a sixth embodiment of the present invention.

FIG. 8 is a sectional view of a heat storage body and a driving mechanism thereof according to a seventh embodiment of the present invention.

FIG. 9 is a schematic view of a heat storage device according to an eighth embodiment of the present invention.

FIG. 10 is a schematic view of a heat storage device according to a ninth embodiment of the present invention.

FIG. 11 is a perspective view of a heat storage body according to a tenth embodiment of the present invention.

FIG. 12 is a sectional view of a heat storage body according to a tenth embodiment of the present invention.

FIG. 13 is a schematic view of a heat storage device according to an eleventh embodiment of the present invention.

FIG. 14 is a schematic diagram for explaining a renewal method of the heat storage device of the water heat storage type air conditioning system according to the present invention.

FIG. 15 is a schematic diagram for explaining another renewal method of the heat storage device of the water heat storage type air conditioning system according to the present invention.

FIG. 16 is a schematic diagram of a heat storage device of a conventional water heat storage type air conditioning system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Storage tank 2 Water (refrigerant liquid) 3 Refrigerator 10 Circulation mechanism 20 Air injection mechanism 30 Heat storage body 31 Container 32 Aqueous solution 33 Fine particles 101 Tube 102 Pump

Continuing from the front page (Declaration by the applicant) Patent application for the results of research commissioned by the national government, etc. (FY2000 New Energy and Industrial Technology Development Organization Commissioned research on the development of an environment-friendly high-efficiency energy utilization system (high-density latent heat transport) (Technology research and development), subject to Article 30 of the Act on Special Measures for Industrial Vital Regeneration) (72) Inventor Hidemasa Ogoshi 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd.

Claims (14)

[Claims] 1. A storage tank for storing a refrigerant liquid, a refrigerator for cooling the refrigerant liquid, and a heat storage unit immersed in the refrigerant liquid, wherein the heat storage unit is a sealed container. And an aqueous solution that forms a hydrate by being filled in the hermetically sealed container, and particles that are contained in the hermetically sealed container and that prevent the aqueous solution from being supercooled. Heat storage device. 2. The heat storage device according to claim 1, further comprising a container driving unit for causing the container to change its posture or move in the refrigerant liquid and dispersing the fine particles in the container. apparatus. 3. The method according to claim 1, wherein the container driving means is a flow mechanism that causes the refrigerant liquid in the storage tank to flow and causes the posture of the container to change or move by the flow of the refrigerant liquid. The heat storage device according to claim 2. 4. The container driving means is an air injection mechanism for injecting air into the refrigerant liquid in the storage tank, and causing the container to change its attitude or move by rising air bubbles. 3. The heat storage device according to claim 2, wherein: 5. The heat storage device according to claim 2, wherein said container driving means is a mechanical drive mechanism for mechanically changing or moving a position of said heat storage container. 6. The heat storage device according to claim 1, wherein the container of the heat storage body is free floating in the refrigerant liquid in the storage tank. 7. The storage container according to claim 1, wherein the heat storage container is rotatably supported in the storage tank.
Heat storage device. 8. The heat storage device according to claim 1, wherein a blade member for promoting a change in posture or movement of the container is provided outside the heat storage container. 9. The heat storage device according to claim 1, wherein the aqueous solution filled in the hermetically sealed container contains a guest compound whose hydrate formation temperature changes in accordance with the concentration of the aqueous solution. . 10. The fine particles have a particle size of 10 μm.
10. The following fine particles:
Heat storage device. 11. The fine particles have a particle size of 10 μm.
The following fine particles, wherein the concentration of the fine particles in the aqueous solution is 0.1
The amount is not less than mg / L.
Heat storage device. 12. The fine particles have a particle size of 100 μm.
The heat storage device according to any one of claims 1 to 9, wherein the heat storage device is a fine particle having a particle size of m or less. 13. A method for renewing a heat storage device including a storage tank for storing a refrigerant liquid and a refrigerator for cooling the refrigerant liquid, the method comprising renewing a heat-sealable container; An aqueous solution that forms a hydrate by being filled and cooled, and a heat storage body that is contained in the hermetically sealed container and that includes fine particles that prevent supercooling of the aqueous solution, is provided in the storage tank. A renewal method for a heat storage device, which is introduced into a refrigerant liquid. 14. A method for renewing a heat storage device comprising a storage tank for storing a refrigerant liquid and a refrigerator for cooling the refrigerant liquid, wherein a hydrate is generated by cooling, and supercooling is performed. Preparing a unit including a tube filled with an aqueous solution in which fine particles to be prevented are dispersed and a pump for circulating the aqueous solution in the tube, and installing the tube in the refrigerant liquid in the storage tank. Renewal method of the heat storage device.