JP2002243375A - Low water level temperature laminated heat accumulative tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome problems found in the prior art heat accumulative tank set at a building's underground, i.e., (a) a connected type mixing water tank has a low efficiency of the tank by about 65% and is not suitable for accumulating a large amount of heat, (b) a general temperature laminated type heat accumulative tank made as a single tank does not have any low water level, but must be constructed to have a special structure for a building body, resulting in that its cost is increased, and (c) in turn, the low water level temperature laminated heat accumulative tank requires a diffuser for every space, resulting in that its cost is increased. SOLUTION: In view of the foregoing, the tank provides a heat accumulative tank in a low water level temperature laminated type heat accumulative tank in which a plurality of divided spaces are connected by communication segments, wherein diffusers 2u, 2d are arranged at an upper position and a lower position of a space 1b in the adjoining spaces 1a, 1b, 1c, 1d, 1e,..., and at the same time partition walls 3a, 3b,... in regard to the other space are provided with communicating segments 4u, 4d arranged at an upper position and a lower position in correspondence with the diffusers. The diffuser has a constitution in which a plurality of water spraying and sucking directions are attained to enable a communication part to be formed at the partition wall for the adjoining space in each of the directions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-water temperature stratified heat storage tank.

[0002]

2. Description of the Related Art A heat storage tank is generally installed in a pit in a basement of a building, and stores water having a depth of 1.5 m, for example, in a space divided for each span surrounded by an underground beam and uses it for heat storage. And there are a mixed type and a temperature stratified type.

As an example of a mixed-type heat storage tank, as shown in, for example, FIGS. 3 and 4, each divided space a is connected by a communicating portion b to form a connected-type mixed water tank in many cases. .

[0004] On the other hand, a general thermal stratification type heat storage tank has a water depth of 5 m or more and is often constituted as a single tank by a single space, instead of being constituted by a plurality of divided spaces.

As another example of a temperature stratified type heat storage tank,
For example, as shown in FIG. 5 and FIG. 6, there is a water disperser called diffusers d and e arranged vertically above and below each of a plurality of divided shallow spaces c, and these diffusers d , E form a temperature stratification in the water in each space c such that one blows out water in the lateral direction and the other sucks in water. In addition, these multiple spaces are
Passage g formed in the center of the beam that is the partition wall f in the adjacent space
And a lower drain port (not shown).

[0006]

The above-described conventional heat storage tank has the following problems. a. In the connected type mixed water tank, since each space operates as a mixed type water tank, the heat storage tank efficiency is as low as about 65%, which is disadvantageous for storing a large amount of heat. b. On the other hand, a thermal stratification type thermal storage tank can secure a thermal storage tank efficiency of about 80%. However, in a temperature stratification type thermal storage tank configured as a single tank, the frame must have a special structure. Cost increases. c. On the other hand, in a thermal stratification type heat storage tank in which a diffuser is arranged so that a temperature stratification is formed in a shallow space, a heat storage tank efficiency of about 80% can be secured, but a diffuser is required for each space. Therefore, the cost increases. Therefore, an object of the present invention is to solve such a problem.

[0007]

In order to solve the above-mentioned problems, according to the present invention, in a heat storage tank formed by connecting a plurality of divided spaces by a communicating portion, the heat storage tank is located at one of the upper and lower positions of an adjacent space. We propose a low water temperature stratified heat storage tank in which a diffuser is arranged, and a communicating part is formed at the upper and lower positions corresponding to the diffuser on the partition wall with other spaces.

Further, in the present invention, in the above structure, the diffuser has a plurality of water blowing and suction directions, and a low water temperature stratification having a communicating portion with a partition wall adjacent to the space in each direction. Type heat storage tank is proposed.

According to the present invention, in the above configuration, a plurality of other spaces are sequentially connected in a direction away from the space in which the diffuser is arranged, and a partition between the other spaces is provided with upper and lower portions corresponding to the diffuser. We propose a low-water-temperature stratified-type heat storage tank that has a communication part at a position.

In the present invention, for example, when storing cold heat, the water cooled by the cooler is blown laterally from the lower diffuser to the lower part of the space, and the water in the space is discharged from the upper diffuser. By sucking in from the lateral direction and refluxing it to the cooler, a temperature stratification utilizing the density difference of water is favorably formed in the space where the diffuser is arranged.

At this time, the water blown laterally from the lower diffuser flows into the other space through the communicating portion formed below the partition wall, and the water in the upper space in the other space is removed. Since the gas flows into the space where the diffuser is arranged through the communicating portion formed on the upper side, the temperature stratification is well formed in other spaces. Therefore, there is no need to install a diffuser in another space.

In the case of using the cold heat stored in the heat storage tank, on the contrary, water in the lower layer in the space is sucked from the lower diffuser and used for the cold heat, and used for the cold heat. By blowing water from the upper diffuser into the space, the opposite flow of water is formed in the space where the diffuser is located and the other space adjacent to it, without disturbing the temperature stratification. The cold water in the space can be used.

In the case where heat is stored in the heat storage tank and used, it is possible to form a thermal stratification and use the same by the flow of water opposite to that described above.

The diffuser arranged in the space can be provided with a plurality of directions, for example, two directions, for blowing and sucking water. In this case, the diffuser is arranged in another space adjacent to both sides of the space in which the diffuser is arranged. Without using a diffuser, a temperature stratification can be formed and its use can be measured.

Further, a plurality of other spaces are sequentially connected in a direction away from the space in which the diffuser is arranged, and a communication portion is formed in a partition between the other spaces at a vertical position corresponding to the diffuser. The temperature stratification can also be formed in a space that is not directly adjacent to the space in which the diffuser is arranged.

[0016]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 is a longitudinal sectional view showing a main part of a heat storage tank installed in a pit under the building, and FIG. 2 is a sectional view taken along line AA of FIG. Symbols 1a, 1b, 1c,
1d, 1e, 1f,... Indicate spaces divided under the building, that is, spaces surrounded by underground beams and divided for each span, and these are consecutively adjacent. In the middle space 1b, the diffuser 2 is
u, 2d are arranged. These diffusers 2
As indicated by arrows (solid line and two-dot chain line) in FIG.

Each of the partitions 3a and 3c with the spaces 1a and 1c adjacent to both sides of the intermediate space 1b is provided with a communicating portion 4 at a vertical position corresponding to the diffusers 2u and 2d.
u, 4d. These communication parts 4u and 4d are shown in FIG.
Are arranged in the horizontal direction as shown in FIG.

Each of the spaces 1a, 1c is adjacent to another space 1d, 1e in a direction away from the space 1b, and the partitions 3d of the spaces 1a, 1d; , 3c as well as the diffusers 2u, 2d
The communication parts 4u and 4d are formed at the upper and lower positions corresponding to. Further, another space 1f is formed adjacent to the space 1e in a direction away from the space 1b, and communication portions 4u and 4d are formed in the partition wall 3e at upper and lower positions corresponding to the diffusers 2u and 2d. are doing.

The operation of the above configuration will now be described. First, when storing cold heat at night in the cooling period, a heat exchanger (not shown) of an air conditioner as shown by a two-dot chain line arrow in the figure.
Is blown out from the lower diffuser 2d through the chilled water system 5 to the lower part of the space 1b in the lateral direction, and the water in the space is sucked in from the upper diffuser 2u from the lateral direction through the chilled water system 5 through the chilled water system 5. By refluxing in the cooler, a temperature stratification is favorably formed in the space 1b due to the difference in density of water.

At this time, water blown laterally from the lower diffuser 2d, that is, in the horizontal direction in the figure, is separated from the partition walls 3a,
3b, flows into the lower part of the adjacent space 1a, 1c through the communicating part 4d formed below, and the space 1a, 1c
The water in the upper part of the inside flows into the space 1b in the intermediate part through the communicating part 4u formed on the upper side.

On the other hand, the spaces 1a and 1c pass through the communicating portion 4d.
When the water flows into the lower part of the space 1a, 1c, the lower water in the space 1a, 1c flows into the space 1d, 1e adjacent to the space 1a, 1c through the communicating part 4d of the partition walls 3d, 3c, respectively. The water above the spaces 1d and 1e is divided by the partition walls 3d and
The air flows into the upper portions of the spaces 1a and 1c through the communication portion 4u of the space 3c. Similarly, water at the lower part of the space 1e flows into the space 1f through the communication part 4d of the partition 3e, and water at the upper part of the space 1f flows into the space 1c through the communication part 4u.

Thus, even in the spaces 1a, 1c, 1d, 1e, 1f,... Where the diffusers are not arranged, the diffusers 2u, 2d arranged in the space 1b generate lateral flows on the upper side and the lower side. Thereby, temperature stratification is favorably formed. Therefore, it is not necessary to install a diffuser for forming a temperature stratification in these other spaces 1a, 1c, 1d, 1e, 1f,.

As described above, when the cold stored in the heat storage tank at night is used in the daytime, the lower diffuser 2d draws the lower layer of water in the space 1b to draw the cold water system 5 in the opposite direction. In addition to the space 1b, the space 1a, 1c, and the space 1b are blown out from the upper diffuser 2u to the upper layer in the space 1b by blowing the water, which has been subjected to cooling and used to increase the temperature by the use of the cold heat, to the upper layer in the space 1b. 1
, d, 1e, 1f,..., a water flow opposite to that described above is formed, and all the spaces 1a, 1b, 1c,.
Cold water in 1d, 1e, 1f,... Can be used.

The operation described above is an operation in the cooling period. However, in the case where the heat is stored in the heat storage tank and used during the heating period, the formation of the temperature stratification and the formation of the temperature stratification by the reverse flow of the water are performed. You can measure usage.

Thus, in the present invention, the spaces 1a, 1
It is possible to satisfactorily form the thermal stratification and effectively use the heat storage in a low-temperature heat storage tank having a shallow water depth composed of b, 1c, 1d, 1e, 1f,...

In the embodiment described above, the diffusers 2u and 2d are arranged such that the directions of blowing and sucking water are both left and right as shown by arrows (solid and two-dot chain lines) in FIG. , In which no diffuser is arranged, a plurality of (or a single, not shown) space 1a, 1c, 1d, 1e, 1f,... Is different from this. May be configured as only one direction, and one or a plurality of spaces may be sequentially connected to the direction side. Further, in some cases, the diffuser may arrange the other space two-dimensionally with three or more directions of water blowing and suction.

[0027]

As described above, the present invention has the following effects. a. Since the thermal stratification is formed well in the shallow space under the building at a low water level even at a low water level, the efficiency of the heat storage tank can be increased compared to the combined type mixed water tank,
Therefore, the heat storage capacity can be increased. b. The cost does not increase because there is no need to make the frame a special structure as in a general thermal stratification type heat storage tank configured as a single tank. c. Unlike a conventional low-water-temperature stratified-type heat storage tank in which a diffuser is arranged so that a temperature stratification is formed in a shallow space, it is not necessary to arrange a diffuser in each space, so that costs can be reduced. .

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part showing an embodiment of a temperature stratified heat storage tank according to the present invention.

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

FIG. 3 is a longitudinal sectional view showing an example of a conventional connection type mixing water tank.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a longitudinal sectional view showing an example of a conventional low water temperature stratified heat storage tank.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

[Explanation of symbols]

1a, 1b, 1c, 1d, 1e, 1f, ... Space 2u, 2d Diffuser 3a, 3b, 3c, 3d, 3e, ... Partition wall 4u, 4d Communication part 5 Cold water system

Claims (3)

[Claims] In a heat storage tank configured by connecting a plurality of divided spaces by a communicating portion, a diffuser is arranged at one of upper and lower positions of an adjacent space, and a diffuser is provided on a partition wall with another space. Low water temperature stratified type heat storage tank characterized by correspondingly formed communication parts at upper and lower positions 2. The low diffuser according to claim 1, wherein the diffuser has a plurality of directions in which water is blown out and sucked in, and a communicating part is formed in a partition wall with a space adjacent in each direction. Water temperature stratified thermal storage tank 3. A structure in which a plurality of other spaces are sequentially connected in a direction away from a space in which the diffuser is arranged, and a communication portion is formed in a partition wall between the other spaces at a vertical position corresponding to the diffuser. A low-temperature stratified thermal storage tank according to claim 1 or 2,