JPH0297835A - Construction of stored ice radiator in ice heat accumulation system - Google Patents

Abstract

PURPOSE:To make it possible to operate both ice making and ice storage operation and cooling load operation in parallel by laying out a cold water reservoir which stores ice generated from supercooling water and a cold water reservoir which stores return water from said cooling load so that they may adjoin by way of a heat transfer wall, and communicating the lower parts of both the reservoirs by way of a filter. CONSTITUTION:During ice making, a refrigerant is cooled by a refrigerator 13 and is circulated by way of a heat exchanger 15. The water to be cooled from an ice accumulator is supercooling by the heat exchanger 15, and fed into a supercooling resolving tank 4. The supercooling water which is supplied by a little by a little from a feed pipe tip 18a, gets frozen when it is placed into contact with an electronic cooling unit 21 which is preset as cooling state. A sherbet-like ice slurry S is generated based on the frozen water as its seed ice. The ice slurry S drops on the wall surface of an ice reservoir 2 and stored as ice in the ice reservoir 2. During cooling load operation, the cooling water in the ice reservoir 2 is fed into cooling load 5 while return water is sprayed into a cooling water tank 3 by a shower 24, cooled by the ice reservoir 2 by way of a heat transfer wall 6, then moves to a cooling water tank 3. Therefore, this construction makes is possible to feed constantly cooling water whose temperature is the most proper to the operation of the cooling load 5 by way of a constant filter 7 from the cooling water tank 3.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of an ice storage and heat dissipation tank in an ice heat storage system used for cooling loads.

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

Since this ice heat storage system utilizes the heat of solidification when water turns into ice, it dramatically increases the heat storage capacity per volume compared to conventional water heat storage systems that only use temperature changes in water. In other words, it is possible to significantly reduce the size of the heat storage space.

The configuration of a conventional ice heat storage system centered on an ice storage tank is disclosed, for example, in Japanese Utility Model Application Publication No. 14063/1983. The operating system is different during operation.

That is, when making ice at night, the refrigerator 30 is operated to lower the temperature of brine to a predetermined temperature and the brine is fed 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 is turned into supercooled water of 0°C or less by the brine, and then transferred to the upper part of the ice storage tank 32 and dropped from the discharge pipe 33. The supercooled water is frozen by the impact of the fall, and becomes a sherbet-like water. ice is generated and stored in the ice storage tank 32 until a predetermined filling rate is reached.

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

Further, the secondary return water from the air conditioner 34 via the heat exchanger 31 is dropped from the upper part of the ice storage tank 32.

By sprinkling water into the ice storage tank 32 via the rotating rake device 35, the ice in the tank is melted.

(Problem to be Solved by the Invention) However, in such a system, even when the ice in the ice storage tank 32 becomes extremely insufficient for the cooling load during daytime operation and new ice must be generated, Air conditioner 34
The temperature of the return water is about 12° C., and it is impossible to convert the return water at this temperature into supercooled water at once in the heat exchanger 31.

Therefore, when it is necessary to make ice during the day, -time air conditioner 3
There is a disadvantage that the operation of Step 4 must be stopped to make ice.

In addition, during daytime operation, the ice storage tank 32
The ice in the tank is melted by sprinkling water inside the tank, and since the temperature of the secondary return water has risen considerably, the ice melts more rapidly than necessary, resulting in wasted waste. There is a problem in that ice tends to run out due to heat loss.

An object of the present invention is to provide a structure of an ice storage heat dissipation tank in an ice heat storage system that can solve the 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 includes an ice storage tank that stores ice generated from supercooled water;
A cold water tank for storing return water from a cooling load is arranged adjacently through a heat transfer wall, and the ice storage tank and the vicinity of the lower part of the cold water tank are communicated through a filter. .

Further, it is preferable that the lower portions of the ice storage tank and the cold water tank are each formed into a tapered surface that converges toward the lower end, and a drain is provided at the lower end.

(Example) Hereinafter, preferred embodiments 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 and heat dissipation tank 1 according to this embodiment is composed of an ice storage tank 2 and a cold water tank 3.

A supercooling elimination tank 4 is provided at the top of the ice storage tank 2.
The supercooling elimination tank 4 generates ice slurry from the 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 with a heat transfer wall 6 in between.

In addition, near the bottom of the ice storage JfJ2 and the cold water tank 3, the boundary formed by the heat transfer wall 6 is eliminated, and the two tanks are communicated through the filter 7.

Further, below the filter 7, the ice storage tank 2 and the cold water tank 3 are each formed as a tapered surface 8.9 converging toward the lower end, and each has a drain outlet 10.9 at the lower end.
11 are provided.

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

Therefore, when making ice with the ice heat storage system according to this embodiment, as shown in FIG.
4 to the heat exchanger 15, and is circulated through the return pipe 16 to both the refrigerators 13.

At the same time, O2 is supplied from the lower part of the ice storage tank 2 via the return pipe 17.
The water to be cooled at a temperature of about ℃ flows into the heat exchanger I3, and heat exchanges with the refrigerant or brine, resulting in a temperature of -2℃ to
It is supercooled to about -3° C. and is fed from the feed pipe 18 to the supercooling elimination tank 4.

As shown in FIG. 2, for example, the supercooling elimination tank 4 according to this embodiment is formed with a supercooling descending surface 19 having a predetermined inclination angle a and an ice delivery surface 20, and an electronic cooling unit 2
1 is installed on the ice delivery surface 20.

Therefore, the supercooled water supplied little by little at a gentle flow rate from the tip 18a of the feed pipe 18 slowly descends in the direction of the arrow from the upper part of the supercooled water descending surface 6, and is pre-heated to about -5°C. When it comes into contact with the electronic cooling unit 21 that is set to a cooling state, it freezes and initial ice is made.

Thereafter, using the ice crystals as seed water, the supercooled water that descends on the supercooled water descending surface 19 and is sequentially supplied comes into contact with the seed water and is continuously produced as a sherbet-like ice slurry S. Teyuki, the previously generated ice slurry S
is gradually pressed by the ice slurry S that will be generated later, and slowly rises on the ice delivery surface 20 toward the tip 20a, and from the tip 20a, the wall surface of the ice storage tank 2 due to its own weight. The ice slowly descends along the ice storage tank 2 and is stored in the ice storage tank 2 without giving any impact.

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

On the other hand, during operation of the cooling load, cooling water of about θ°C supplied from the bottom of the ice storage tank 2 is sent to the cooling load 5 such as an air conditioner via the feed pipe 22, and is sent to the cooling load 5 such as an air conditioner via the return pipe 23. The returned water is uniformly sprayed into the cold water tank 3 from the shower device 24.

The water returned to the cold water layer 3 is gradually cooled by the ice in the ice storage tank 2 through the heat transfer wall 6 and moves downward into the cold water tank 3. A temperature distribution layer is formed in which the water becomes colder toward the bottom, and when it reaches the bottom of the cold water tank 3, the water is at about 0°C.

Therefore, cold water at an optimal temperature for operation of the cooling load 5 can be constantly supplied from the cold water tank 3 via the filter 7.

Additionally, in FIG. 1, 24, 25, and 26 are circulation pumps, respectively.

In this embodiment having such a configuration, the ice storage tank 2 and the cold water tank 3 are
The secondary return water from the cooling load 5 is not returned to the ice storage tank 2 as in the conventional example, but is instead sent to the cold water tank 3.
It is configured so that it can exchange heat with the ice storage tank and obtain cold water of about 60℃ from the bottom of the cold water tank.
Ice making and ice storage operations and operation of the cooling load 5 can be performed in parallel.

Therefore, even if the ice in the ice storage tank 2 becomes insufficient for the cooling load during daytime operation of the cooling load 5 and new ice must be generated, there is no need to stop the operation of the cooling load 5. Additionally, it becomes possible to perform the ice making and ice storage operations described above.

Further, the ice in the ice storage tank 2 gradually melts by exchanging heat with the water in the cold water tank 3 via the heat transfer wall 6 as described above.

Therefore, unlike the conventional method of melting the ice in the ice storage tank by sprinkling water into it, the ice does not melt more rapidly than necessary, achieving efficient heat exchange. can do.

Further, the lower portions of the ice storage tank 2 and the cold water tank 3 are each formed as a tapered surface 8.9 converging toward the lower end, and drains 10 and 11 are provided at the lower ends, respectively, so that the ice storage tank 2 and the cold water tank 3 When cleaning or inspecting the cold water tank 3, use the drain drain 10.
Drainage can be easily performed from 11, and maintenance and inspection can be made more efficient.

Note that the present invention is not limited to the above embodiments,
For example, the configuration of the supercooling elimination tank 4 can be modified as appropriate other than that shown in FIG. It goes without saying that various modifications are possible 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 achieve the following effects.

(1) Ice making and water storage operation and cooling load operation can be performed in parallel, and even when new ice needs to be generated during daytime operation, cooling load operation does not need to be stopped. disappears.

(2) Ice storage/ice in the tank gradually melts by exchanging heat with the water in the cold water tank via the heat transfer wall, making it difficult to achieve efficient heat exchange. can.

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

[Brief explanation of the drawing]

FIG. 1 is a conceptual diagram showing an embodiment of a system including an ice storage heat dissipation tank according to the present invention, FIG. 2 is a conceptual diagram showing the configuration of a supercooling elimination tank according to this embodiment, and FIGS. FIG. 4 is a conceptual diagram showing an example of a conventional ice heat storage system. 1...Ice storage heat dissipation tank. 2...Ice storage tank, 4...Supercooling elimination tank, 6...Heat transfer wall, 8.9...Tapered surface, 10,l 1-...Drain drain. 13... Refrigerator, 1 3... Cold water tank. 5... Cooling load, 7... Filter 5... Heat exchanger.

Claims (2)

[Claims] (1) An ice storage tank that stores ice generated from supercooled water;
An ice heat storage system characterized in that a cold water tank for storing return water from a cooling load is placed adjacent to the cold water tank via a heat transfer wall, and the ice storage tank and the vicinity of the lower part of the cold water tank are communicated through a filter. Structure of an ice storage heat dissipation tank. (2) The lower portions of the ice storage tank and the cold water tank are each formed into a tapered surface that converges toward the lower end, and a drain is provided at the lower end. Structure of ice heat sink.