JPH068694B2 - Structure of Ice Storage Radiator in Ice Storage System - Google Patents

Description

TECHNICAL FIELD The present invention relates to the structure of an ice storage radiating tank in an ice heat storage system used for cooling loads.

(Prior Art) In recent years, various ice heat storage systems have been proposed as alternatives to conventional water heat storage systems.

Since the ice heat storage system utilizes the heat of solidification when water turns into ice, compared with the conventional water heat storage system using only the temperature change of water, the heat storage capacity per volume is dramatically increased. It can be improved, in other words, the heat storage space can be remarkably reduced in size.

Thus, the structure centering on the ice storage tank in the conventional ice heat storage system is disclosed in, for example, Japanese Utility Model Laid-Open No. 63-14063, and at the time of ice making at night shown in FIG. 3 and at the daytime shown in FIG. The operating system is different from that during operation.

That is, during nighttime ice making, the refrigerator 30 is operated to lower the temperature of the brine to a predetermined temperature and send it into the heat exchanger 31, while the water to be cooled drawn from the bottom of the ice storage tank 32 is transferred to the heat exchanger 31. The supercooled water of 0 ° C. or lower is sent to the upper part of the ice storage tank 32 by the brine and dropped from the discharge pipe 33, and the supercooled water is frozen by the impact at the time of dropping to form a sherbet. The ice is generated and stored in the ice storage tank 32 until a predetermined filling rate is achieved.

On the other hand, at the time of daytime operation (at the time of thawing ice), the water near 0 ° C. extracted from the bottom of the ice storage tank 32 is sent to the cooling load such as the air conditioner 34.

In addition, the secondary side return water from the air conditioner 34 via the heat exchanger 31 is dropped from the upper portion of the ice storage tank 32, and is sprinkled into the ice storage tank 32 via the rotary rake device 35, thereby It is supposed to melt the ice.

(Problems to be Solved by the Invention) However, in such a system, even when the ice in the ice storage tank 32 is extremely short of the cooling load during the daytime operation, and ice has to be newly generated, Air conditioner 34
The return water from the water is up to about 12 ° C., and it is impossible for the heat exchanger 31 to immediately turn the return water into supercooled water.

Therefore, when it is necessary to make ice during the daytime, the temporary air conditioner 3
There is a drawback that the operation of No. 4 has to be stopped and the ice is made.

Also, during daytime operation, the ice storage tank 32 as described above.
By sprinkling water inside, the ice in the tank is melted, and the temperature of the secondary return water has risen to a considerable extent. There is a problem that ice loss tends to occur due to heat loss.

An object of the present invention is to provide a structure of an ice storage heat radiating tank in an ice heat storage system that can solve the above conventional problems.

(Means for Solving the Problems) In order to achieve the above object, the structure of the ice storage heat dissipation tank according to the present invention is an ice storage tank for storing ice generated from supercooled water,
It is characterized in that a cold water tank for storing return water from a cooling load is arranged adjacently via a heat transfer wall, and the ice storage tank, the cold water tank, and the lower vicinity are communicated with each other through a filter. .

Further, it is desirable that the lower portions of the ice storage tank and the cold water tank are formed on tapered surfaces that converge toward the lower end, and a drain is provided at the lower end.

(Examples) Hereinafter, preferred examples of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and an ice storage radiating tank 1 according to this embodiment comprises an ice storage tank 2 and a cold water tank 3.

A supercooling elimination tank 4 is provided above the ice storage tank 2,
The supercooling elimination tank 4 generates ice slurry from supercooled water and stores it in the ice storage tank 2.

The cold water tank 3 stores return water from a cooling load 5 such as an air conditioner, and is arranged adjacent to the cold water tank 2 via a heat transfer wall 6.

Further, in the vicinity of the lower part of the ice storage tank 2 and the cold water tank 3, the boundary by the heat transfer wall 6 is eliminated, and both tanks are communicated with each other via the filter 7.

Further, below the filter 7, the ice storage tank 2 and the cold water tank 3 are formed as tapered surfaces 8 and 9 that converge toward the lower end, respectively, and drain drains 10 and 10 are provided at the lower ends.
11 is provided.

A filter 12 for separating ice and cold water is also provided in the ice storage tank 2 near the upper end of the filter 7.

Thus, during ice making in the ice heat storage system according to the present embodiment, as shown in FIG. 1, the refrigerator 13 cools the refrigerant or brine to a predetermined temperature of 0 ° C. or less, and the feed pipe 1
4 is sent to the heat exchanger 15 and is circulated again from the return pipe 16 to the refrigerator 13.

At the same time, from the bottom of the ice storage tank 2 through the return pipe 17
Water to be cooled at a temperature of about ℃ flows into the heat exchanger 15, and heat is exchanged with the refrigerant or the brine, and the temperature is from -2 ℃ to
After being supercooled to about −3 ° C., it is fed from the feed pipe 18 to the subcooling elimination tank 4.

In the subcooling elimination tank 4 according to the present embodiment, for example, as shown in FIG. 2, a subcooling descending surface 19 having a predetermined inclination angle α.
And the ice delivery surface 20 are formed, and the electronic cooling unit 21 is arranged on the ice delivery surface 20.

Then, the supercooled water supplied from the tip 18a of the feed pipe 18 little by little at a slow flow rate slowly descends from the upper portion of the supercooled water descending surface 19 in the arrow direction, and has a temperature of about -7 ° C in advance. By contacting the electronic cooling unit 21 which is set in the cooling state, it is frozen and initial ice making is performed.

Thereafter, the ice crystals are used as seed ice, and the supercooled water that is sequentially supplied after descending the supercooled water descending surface 19 comes into contact with the seed ice to generate a sherbet-like ice slurry S in a connected manner. The ice slurry S produced earlier
Is gradually pressed by the ice slurry S generated later and gradually rises on the ice delivery surface 20 toward the tip portion 20a, and along the wall surface of the ice storage tank 2 from the tip portion 20a by its own weight. It slowly descends and accumulates ice in the ice storage tank 2 without giving a shock.

In this way, the sensible heat of the supercooled water is converted into the latent heat of the ice slurry S and stored in the ice storage tank 2.

On the other hand, during the operation of the cooling load, the cooling water of about 0 ° C. supplied from the bottom of the ice storage tank 2 is sent to the cooling load 5 such as the air conditioner through the supply pipe 22 and the return pipe 23. The return water is uniformly sprayed from the shower device 27 into the cold water tank 3.

Then, the water returned to the cold water tank 3 is gradually cooled by the ice in the ice storage tank 2 via the heat transfer wall 6 and moves to the lower side of the cold water tank 3, so that the water inside the cold water tank 3 is cooled. A temperature distribution layer of water that becomes colder toward the bottom is formed at the bottom, and when reaching the bottom of the cold water tank 3, the water is cold water at about 0 ° C.

Therefore, the cold water having the optimum temperature for the operation of the cooling load 5 can be constantly fed from the cold water tank 3 via the filter 7 at all times.

In addition, in FIG. 1, reference numerals 24, 25 and 26 are circulation pumps.

In this embodiment having such a configuration, the ice storage tank 2 and the cold water tank 3
And 2 are independently formed, and the secondary return water from the cooling load 5 is returned to the cold water tank 3 instead of being returned to the ice storage tank 2 as in the conventional example, and heat is exchanged with the ice storage tank. Since the cold water of about 0 ° C. is obtained from the lower part of the cold water tank, the ice making and ice storing operations and the operation of the cooling load 5 can be performed in parallel.

Therefore, it is not necessary to stop the operation of the cooling load 5 even when the ice in the ice storage tank 2 becomes insufficient for the cooling load during the operation of the cooling load 5 in the daytime and new ice has to be generated. Moreover, it becomes possible to perform the above-described ice making and ice storage operations.

The ice in the ice storage tank 2 is gradually melted by heat exchange with the water in the cold water tank 3 via the heat transfer wall 6 as described above.

Therefore, unlike the method of melting ice in the ice storage tank by sprinkling water in the ice storage tank as in the conventional example, melting of ice does not occur more rapidly than necessary and efficient heat exchange is achieved. can do.

Further, the lower portions of the ice storage tank 2 and the cold water tank 3 are formed as tapered surfaces 8 and 9 that converge toward the lower end, respectively, and drain drains 10 and 11 are provided at the lower ends, respectively. When cleaning or inspecting the cold water tank 3, the drain drain 10,
Drainage can be done easily from 11 and the efficiency of maintenance and inspection can be improved.

The present invention is not limited to the above embodiment,
For example, the structure of the supercooling elimination tank 4 can be appropriately changed to those other than the one shown in FIG. It is needless to say that various modifications can be made without departing from the gist of the present invention, such as adopting an appropriate method.

(Effects of the Invention) The present invention is configured as described above and can exhibit the following effects.

(1) The ice making and ice storage operations and the cooling load operation can be performed in parallel, and it is necessary to stop the cooling load operation even when new ice has to be generated during the daytime operation. Disappears.

(2) The ice in the ice storage tank is gradually melted by heat exchange with the water in the cold water tank via the heat transfer wall, so that efficient heat exchange can be achieved. .

(3) If the lower part of the ice storage tank and the cold water tank are formed as tapered surfaces that converge toward the lower end, and drains are provided at the lower ends, maintenance and inspection of the ice storage tank and the cold water tank can be performed quickly and efficiently. You can

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of a system including an ice storage radiating tank according to the present invention, and FIG. 2 is a conceptual diagram showing a configuration of a supercooling elimination tank according to the present embodiment, FIGS. FIG. 4 is a conceptual diagram showing an example of a conventional ice heat storage system. DESCRIPTION OF SYMBOLS 1 ... Ice storage radiating tank, 2 ... Ice storage tank, 3 ... Cold water tank, 4 ... Supercooling elimination tank, 5 ... Cooling load, 6 ... Heat transfer wall, 7 ... Filter, 8, 9 ... Tapered surface, 10, 11 … Drain drain, 13… Refrigerator, 15… Heat exchanger.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Kurosaki 3-10-1, Iwamotocho, Chiyoda-ku, Tokyo Mitsui Construction Co., Ltd. (72) Inventor Isao Hasegawa 3-10-1 Iwamoto-cho, Chiyoda-ku, Tokyo No. Mitsui Construction Co., Ltd. (72) Inventor Fumihiro Baba 3-10-1 Iwamotocho, Chiyoda-ku, Tokyo Mitsui Construction Co., Ltd.

Claims (2)

[Claims] 1. An ice storage tank for storing ice generated from supercooled water and a cold water tank for storing return water from a cooling load are arranged adjacent to each other via a heat transfer wall to cool the ice storage tank. A structure of an ice storage radiating tank in an ice heat storage system, characterized in that the vicinity of the lower part of the water tank is connected through a filter. 2. The ice heat storage system according to claim 1, wherein lower portions of the ice storage tank and the cold water tank are each formed into a tapered surface that converges toward a lower end, and a drain drain is provided at the lower end. Structure of ice storage heat sink in Japan.