JP3214926B2 - Method of transporting ice / water slurry in ice thermal storage system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, those related to transport how of ice-water slurry in ice thermal storage system.

[0002]

2. Description of the Related Art When cooling and heating by circulating cold and hot water stored in a heat storage tank through a water-side heat exchanger of a fan coil unit and a water heat source heat pump unit disposed in a building, the cooling heat during cooling is stored. Ice heat storage systems that store ice in a tank have attracted particular attention in recent years because even small-scale devices can store a large amount of cold heat.

In such an ice heat storage system, ice stored in a heat storage tank depends on the type of ice to be generated and used, depending on the type of ice to be used, such as an ice mass and a sherbet (ice / water mixed with fine ice and water). Slurry), the latter of which is I. P. F. (The filling rate of ice) can be increased, and the heat storage efficiency can be improved.

In producing such sherbet-like ice, for example, Japanese Patent Application Laid-Open No. 63-21 by the present applicant
In the technology disclosed in Japanese Patent Application Laid-Open No. 7171 and Japanese Patent Application Laid-Open No. 63-231157, a method and an apparatus for continuously producing from supercooled water have been proposed. According to these known techniques, the supercooled water is continuously discharged into the air from the discharge port of the heat transfer tube of the supercooler, and the discharged flow collides with a supercooling release unit such as a collision plate to apply an impact. This makes it possible to continuously and efficiently generate an ice / water slurry.

[0005] The ice / water slurry thus produced is supplied and conveyed to a heat storage tank for storing heat source water for air conditioning by the following method. For example, in "air-conditioning heat storage equipment" disclosed in Japanese Utility Model Laid-Open Publication No. 4-8025, a supercooler is provided near a heat storage tank, and a supercool release means is installed above the heat storage tank. The ice / water slurry that has passed through is dropped directly into the heat storage tank. Further, according to another known technique, an ice / water slurry is conveyed into a heat storage tank by pumping an appropriate pipe through a pump.

[0006]

However, in the former method of directly dropping, there is a limit to the heat storage tank that can be applied due to space and other problems, and such a method cannot be adopted when there is only a limited space. Further, in a so-called multi-tank type heat storage tank in which small tanks communicate with each other, such a supercooling release means must be provided for each tank, so that plumbing work and enlargement of equipment are inevitable. According to the latter, since a large amount of water is simultaneously transferred together with the fine ice, the diameter of the transfer pipe becomes large, and, for example, in the case of a pipe in a tank penetrating through each of the small tanks connected to it. Had a problem that the amount of construction was large.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in view of the fact that the ice / water slurry generated by the supercooled water is conveyed to the heat storage tank by a pipe. The present invention aims to solve the problem by providing a transfer method capable of reducing the size of the medium, and an ice fraction controller for an ice / water slurry used in carrying out the transfer method.

That is, in the first aspect of the present invention, ice generated by using supercooled water generated by a supercooler installed outside the tank is stored in a heat storage tank for storing heat source water for air conditioning, and water is taken from the heat storage tank. In an ice heat storage system using water as an air conditioning heat source, when transferring ice / water slurry produced using supercooled water to a heat storage tank, it is necessary to extract some water during the transfer and discharge it into the heat storage tank. Disclosed is a method for transporting ice / water slurry in an ice heat storage system. Here, the amount of water to be extracted from the ice / water slurry means an amount that does not hinder the subsequent conveyance by extracting the water. For example, about 80% of the total amount of water in the ice / water slurry. % Can be extracted.

According to the second aspect, the heat source water for air conditioning is stored.
A heat storage tank, wherein a plurality of partition walls having communication holes are provided.
Supercooling installed outside the tank in the heat storage tank divided into small tanks
Ice that is generated using the supercooled water generated by the
Ice heat storage system using water taken from the heat storage tank as an air conditioning heat source
Ice and water slurry produced using supercooled water
When transporting through the transport pipe to the lower part of each small tank of the heat tank
And a cylindrical ice fraction regulator with a large number of pores drilled
By being interposed in the transport pipe in the tank, the ice fraction controller
A part of the water being conveyed through the pores
Characterized in that the ice is discharged into the cistern.
Provides a method for transporting ice / water slurry in a heat storage system
I do. Here, as the ice fraction regulator, at both ends of the hollow body, having a connection portion connected to the heat storage tank through pipe,
It is possible to use an ice / water slurry having a large number of pores in its body for releasing only water to the outside .

[0010]

According to the first aspect, the following operation is obtained. The ratio of ice in the ice / water slurry generated by the supercooled water is determined by the temperature (degree of supercooling) of the supercooled water. For example, if the temperature is -2 ° C, 2.5 wt% is the ice ratio.
Even if about 50% of the water in the pipe is extracted from such an ice / water slurry conveyed in the pipe and the proportion of ice is set to about 5 wt%, the subsequent conveyance in the pipe is not hindered. And the amount of water extracted, the amount of ice / water slurry transported is reduced, so that the diameter of the subsequent transport pipe can be reduced.

Further, since the extracted water is discharged to the heat storage tank to which the ice / water slurry is supplied, there is no influence on the system which is taken out of the heat storage tank and circulated through the subcooler as a whole.

According to the second aspect of the present invention, the pores provided in the main body of the regulator are simply connected to the pipeline for transporting the ice / water slurry passing through the inside of the small tank via the ice fraction regulator. The water in the ice / water slurry is discharged directly into the heat storage tank from the above, and the proportion of ice in the ice / water slurry to be transferred thereafter can be adjusted to reduce the total amount of the ice / water slurry to be transferred.
Therefore, the diameter of the transfer pipe connected thereafter can be smaller.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 schematically shows an ice heat storage system for air conditioning according to a first embodiment. Is divided into small tanks 1a, 1b, 1c, 1d, and 1e by partition walls 2, 3, 4, and 5, and each of the small tanks 1a, 1b, 1c, 1d, and 1e is partitioned by a partition wall. 2,
Communication holes 2 provided in the upper or lower part of 3, 4, 5 respectively
a, 3a, 4a, and 5a. Although not shown, a wire mesh or the like is provided around each of the communication holes 2a, 3a, 4a, and 5a to prevent blockage due to adhesion of ice.

The water in the heat storage tank 1 is taken from the small tank 1e through an ice nucleus separator (not shown) such as an ice filter.
The water is continuously supplied to the subcooler 8 through the water channel 7 by the drive of the pump 6, and is converted into supercooled water of 0 ° C. or less by the supercooler 8, and is discharged into the atmosphere. It falls into the pipe 9.

The vertical pipe 9 is a vertical pipe having an inside diameter sufficient to receive the discharge flow of the supercooled water, and has an opening at the upper end and a receiving portion 10 which expands, and a lower end at the lower end. It communicates with the transport pipe 11. Then, by the impact when the supercooled water falls into the vertical pipe 9, an ice / water slurry having fluidity is generated. Pump 1
2 is provided, and the above-mentioned ice / water slurry is pressure-fed in the transport pipe 11 by the pump 12.

The transfer pipe 11 communicates with the lower portion of the inside of the small tank 1a, and an ice fraction adjuster 13 is connected to the tip thereof. As shown in FIG. 2, the ice fraction controller 13 has cylindrical members 13a and 13b at both ends, and is formed in a cylindrical shape by a punching plate having a large number of holes formed therein. A main body 13c having the same diameter as 13a, 13b is provided between these cylindrical bodies 13a, 13b. In the present embodiment, the cylindrical body 13a forms one connecting portion.

At the end of the cylindrical body 13b, a tapered connecting portion 13d serving as the other connecting portion is provided.
The small-diameter conveying pipe 14 is connected to d. The small-diameter conveying pipe 14 constitutes an in-tank pipe penetrating the lower part of each of the partition walls 2, 3, 4, and 5 of the heat storage tank 1, and each of the small tanks 1a, 1b, 1c,
Within 1d and 1e, there are provided branch discharge pipes 15, 16, 17, 18, and 19 for discharging the ice / water slurry transported in the small-diameter transport pipe 14 into the tank. Each of the branch discharge pipes 15, 16, 17, 18 and 19 is provided with an independently openable and closable valve so that any of the small tanks 1a, 1
A configuration is also possible in which the ice / water slurry can be freely supplied for each of b, 1c, 1d, and 1e. ,

The heat source water stored in the heat storage tank 1 is taken from the most upstream small tank 1a and sent to the load side heat exchanger 21 by the secondary side pump 20, and the circulating water whose temperature is raised is The heat is returned to the most downstream small tank 1e in the heat storage tank 1.

This embodiment is configured as described above.
In the ice making operation normally performed at night, the water pumped up from the small tank 1e by the pump 6 becomes supercooled water of 0 ° C. or less by the supercooler 8 and is discharged to the vertical pipe 9 at that time. The supercooled state is released by the impact, and ice / water slurry is generated, and is pumped from the transfer pipe 11 to the heat storage tank 1 by the pump 12.

At this time, since the ice fraction controller 13 is connected to the transport pipe 11 in the small tank 1a, the ice / water slurry pumped through the transport pipe 11 is supplied to the ice fraction regulator. 1
3, only water is released from the main body 13c into the small tank 1a, and the amount of ice / water slurry pumped into the small-diameter conveying pipe 14 is reduced. Therefore, the supply of the ice / water slurry to the small tanks 1a, 1b, 1c, 1d, and 1e is not affected by the small-diameter transfer pipe 14 having a smaller diameter than the transfer pipe 11, and the small tanks 1a, 1b, Since the diameter of the transport pipes leading to 1c, 1d, and 1e can be reduced, the amount of piping in the tank can be reduced.

Incidentally, the ice fraction controller 1 in the above embodiment.
3 is configured to release a fixed amount of water from the entire circumference of the main body 13c, but the ratio of ice in the ice / water slurry is determined by the temperature of the generated supercooled water. You may comprise so that adjustment is possible arbitrarily. For example, according to the configuration of the ice fraction adjuster 13 in the above-described embodiment, if a cover slidable in the axial direction or the circumferential direction is provided on the inner periphery of the main body 13c, the main body 13c is moved in accordance with the sliding of the cover. Can be adjusted, whereby the amount of water released from the main body 13c can be changed.

[0022]

According to the first aspect of the present invention, the transported ice
Before the water in the water slurry is supplied into the heat storage tank, only a part of the water is extracted, so that the amount of the ice / water slurry to be supplied further is reduced by that amount, and as a result, the subsequent transfer pipe The diameter of the pipe can be reduced to reduce the amount of piping. In addition, since the extracted water is discharged into the heat storage tank, it does not affect the entire system.

According to the second aspect of the present invention, the ice penetrating the small tank
If an ice fraction adjuster is connected to the water slurry conveying pipe via water, the water in the ice / water slurry is discharged into the small tank from the pores provided in the adjuster main body. The percentage of ice in the ice / water slurry is adjusted to
The total amount of the water slurry can be reduced. Therefore, the diameter of the transport pipe connected thereafter can be reduced. In addition, the structure is extremely simple, the installation is easy, and the place is not selected.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a configuration of a first embodiment.

FIG. 2 is an explanatory diagram of an ice fraction regulator in the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thermal storage tank 1a, 1b, 1c, 1d, 1e Small tank 6 Pump 7 Waterway 8 Subcooler 9 Vertical pipe 11 Transport pipe 12 Pump 13 Ice fraction adjuster 14 Small diameter transport pipe 15, 16, 17, 18, 19 Branch discharge pipe 20 Secondary side pump 21 Load side heat exchanger

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazunori Eto 4-15-12 Morino, Machida-shi, Tokyo Terada Building Morino B-311 (72) Inventor Tadashi Matsumoto 3-14-50 Co., Tsumadakita, Atsugi-shi, Kanagawa Pomoto Atsugi A-103 (72) Inventor Mitsuru Moriya 3-7-25 Sagamigaoka, Zama City, Kanagawa Prefecture Sunlight Hills 203 (72) Inventor Sakae Kikuchi 1-3-17 Shikutsu Kokuhisa, Atsugi City, Kanagawa Prefecture (72) Inventor Mamoru Iribe 3-20-9, Nishiikuta, Tama-ku, Kawasaki City, Kanagawa Prefecture (56) References JP-A-4-174230 (JP, A) JP-A-2-527 (JP, U) (58) Fields surveyed (Int .Cl. ⁷ , DB name) F24F 5/00

Claims (3)

(57) [Claims] In a heat storage tank for storing heat source water for air conditioning, ice formed by using supercooled water generated by a supercooler installed outside the tank is stored, and water taken from the heat storage tank is used as an air conditioning heat source. In the ice heat storage system, when transferring the ice / water slurry formed using the supercooled water to the heat storage tank, a part of the water is extracted during the transfer and discharged into the heat storage tank, A method for transporting ice / water slurry in an ice thermal storage system. 2. A heat storage tank for storing heat source water for air conditioning,
Divided into multiple small tanks by a partition wall with communication holes
In the heat storage tank, the supercooler installed outside the tank
Ice formed using cooling water is stored and water is taken from the heat storage tank.
Supercooling in an ice storage system that uses water
The ice / water slurry formed using water is placed under each small tank of the thermal storage tank.
When transporting through the transport pipe to the
The installed cylindrical ice fraction regulator is interposed in the transport pipe in the small tank.
Transport through the pores of the ice fraction controller
Part of the water on the way is drawn into the small tank and
In ice storage systems characterized by discharge into
Of ice and water slurry. 3. An ice-fraction adjuster is provided at both ends of a hollow body.
Has a connection part connected to the penetration pipe in the heat storage tank,
Main body with pores that release only water in water slurry to the outside
3. The ice / water slurry according to claim 2, wherein the ice / water slurry is provided in large numbers.
-Transport method.