JP2000304308A - Internal melting type ice storage apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an internal melting type ice storage apparatus in which heat exchange capability in heat dissipation-operation is promoted, and a heat dissipation amount per unit time is increased. SOLUTION: In an internal melting type ice heat storage tank wherein a heat medium is flowed into a heat exchanger 2 installed vertically in a water tank 1, and water 6 kept in the water tank is made into ice which ice is thawed, there is provided means for stirring the water kept in the water tank. The means for stirring water kept in the water tank may be an air injection nozzle 3 provided at a lower portion in the water tank 1 or on the side surface of the water tank 1 or may be an injection apparatus for injecting water taken from the lower portion of the water tank or from an upper portion of the same is injected from the upper or lower portion of the water tank. The stirring means may be provided with control mechanisms 4, 5 for controlling timing the stirring for the water kept in the water tank is started or interrupted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal melting type ice heat storage device, and more particularly to ice making and deicing water held in a water tank used for an indoor air conditioner of a building, for cooling a factory process, and for other cold heat sources. The present invention relates to an internal melting type ice heat storage device.

[0002]

2. Description of the Related Art Due to the principle of operation at the time of heat radiation, a system such as an external melting type ice heat storage system or a dynamic type ice heat storage system is shown in FIG.
As shown in (b), since heat is directly exchanged between the cold water flowing in the ice heat storage layer and the ice, low-temperature extraction or large-capacity extraction in a short time is possible. On the other hand, in the internal melting type ice heat storage method, as shown in FIG. 3A, the ice and the water in the heat storage layer remain stationary during heat release, and are indirectly controlled by the heat medium flowing in the heat exchanger. The melting of ice has made it unsuitable for such applications. The ice heat storage method has a much higher volumetric efficiency than the conventional water heat storage method. Among them, the internal melting type ice heat storage method, in particular, saves a large amount of heat and saves space compared to the dynamic method and the external melting method. Make it possible. However, in the internal melting type ice thermal storage system, it is difficult to extract low temperature compared to other ice thermal storage systems during heat radiation, and the amount of heat that can be released per unit time is limited. It was a weak point that I could not make use of the height of the building.

[0003]

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, the present invention provides an internal melting type ice heat storage device that promotes heat exchange capacity during heat dissipation operation and increases the amount of heat that can be dissipated per unit time. That is the task.

[0004]

In order to solve the above-mentioned problems, in the present invention, a heat medium is caused to flow inside a heat exchanger installed in a vertical direction in a water tank, and water retained in the water tank is made and ice-thawed. The internal melting type ice heat storage tank has means for stirring the water held in the water tank. In the internal melting type ice heat storage device, the means for stirring the water held in the water tank is an air injection nozzle provided on the lower or side surface of the water tank, or water taken out from the lower or upper part of the water tank, Alternatively, it can be an injection device that injects from below. Further, the means for stirring the water held in the water tank may have a control function for controlling the timing of starting or stopping the stirring of the water held in the water tank, and the means for stirring may further include: A control mechanism for controlling an interval for intermittently stirring the retained water may be provided.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention starts and stops a heat exchanger vertically disposed in a water tank, an air or water injection nozzle for stirring water retained in the water tank, and an air or water driving device. And an internal melting type ice heat storage device provided with a control device for causing the ice heat storage device. Next, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a schematic configuration diagram of an internal melting type ice heat storage tank of the present invention. In FIG. 1, 1 is a water tank (heat storage layer), 2 is a heat exchanger, 3 is an air injection nozzle, 4 is a blower, 5 is a control device (controller), 6 is holding water, 7 is a brine introduction pipe, and 8 is brine. It is a discharge pipe. During heat storage, the brine cooled from the brine introduction pipe 7 is introduced into the heat exchanger 2, cools the retained water 6, and stores heat as ice in the water tank 1.

[0006] During the heat dissipation operation, the controller 5 starts and stops the stirring drive devices such as the blower 4 and the pump at a timing determined in advance or calculated. The calculation of the start / stop timing is obtained from the amount of residual ice and the required heat amount / temperature based on the heat radiation characteristics of the ice heat storage layer. The driven air or water is injected from an injection nozzle 3 provided at an upper part, a lower part, or a side surface in the heat storage layer, and agitates, convections, and vibrates the water 6 in the tank. Thereby, the water between the heat exchanger vertically installed in the ice heat storage layer 1 and the ice around the heat exchanger flows to promote heat transfer. The above-mentioned stirring means in the tank allows the system to be designed based on the improved heat radiation characteristics, so that low-temperature chilled water supply and heat storage can be used up in a short time, which were conventionally unsuitable for the internal melting type ice heat storage tank. It has become possible to provide an internal melting type ice heat storage device that can cope with such an operation.

[0007] In the above, the shape of the stirring nozzle in the tank
The arrangement and the stirring flow rate can be appropriately selected depending on the scale and required performance of the apparatus, and are not particularly limited. In FIG. 1, the description is made using air as the driving fluid for stirring. However, the driving fluid may be water, and the stirring may be performed using the water 6 held in the water tank 1. It is provided at the lower or upper part of the water tank 1, and water can be taken out from the opposite side. FIG. 2 shows an overall configuration diagram of an air conditioning system using the internal melting type ice heat storage device of the present invention. 2, the same reference numerals as those in FIG. 1 have the same meanings, 9 is a heat-dissipating brine pump, 11 is a heat storage brine refrigerator, 12 is a brine pump, 13 is a heat-dissipating brine water heat exchanger, and 14 is a follow-up. Brine water heat exchanger,
15 is a chilled water pump for heat radiation, 16 is a chilled water pump for chasing,
EC is the air conditioner, V ₁ ~V ₄ shows the switching valve.

In this system, during the heat storage operation of the heat storage layer 1, the brine refrigerator 11 is operated, and the cooled brine is supplied from the brine introduction pipe 7 to the heat exchanger 2 of the heat storage tank 1.
Then, the water 6 in the heat storage layer 1 is frozen and stored while circulating through the brine discharge pipe 8 and the brine refrigerator 11. In this case, V ₃ and V ₄ of the switching valve are open,
V ₁ and V ₂ are closed. During the heat dissipation operation, the switching valves V ₃ and V ₄ are closed, V ₁ is opened, the heat dissipation brine pump 9 is operated, and the brine cooled by the ice water in the heat storage tank 1 is taken out of the heat exchanger 2, and the brine is cooled. Discharge pipe 8
The cooling water supplied from the air conditioner is supplied to the radiating brine water heat exchanger 13 through the air conditioner, and is provided for cooling. Water heat exchanger 13
From the tank passes through the brine introduction pipe 7 and passes through the heat storage tank 1.
, Is cooled and circulated through a brine discharge pipe 8.

In such a heat dissipation operation, a preset operation is performed.
Timing or calculated timing
As a result, the stirring drive of the blower 4 is started and stopped, and
Air is sprayed from the spill 3 to stir the water 6 in the tank 1
Convection can promote heat transfer. In addition, heat dissipation
At the time of turning, the cold heat request from the air conditioner
If the amount of cold energy supplied exceeds the
The chiller 11 is operated, and the switching valve V _TwoOpen and cool
Brine water heat exchanger 1 from chute brine introduction pipe 7
4 and heat exchange with cold water from the air conditioner to cool the air
Refuel the machine.

[0010]

According to the present invention, the following effects can be obtained. (1) In the internal melting type ice heat storage method, the heat radiation characteristics during low-temperature cold water supply and short-time large-capacity heat radiation are significantly greater than in the conventional case where no water stirring is performed by performing stirring in the tank during the heat dissipation operation. To improve the volumetric efficiency inherent in the internal melting method. (2) Due to the above (1), even in applications where the internal melting type ice heat storage method has been unsuitable in the past, such as low-temperature process cooling and air-conditioning peak cut, a significantly lower cost and space saving than before. It became possible to provide an internal melting type ice heat storage device.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an internal melting type ice heat storage device of the present invention.

FIG. 2 is an overall configuration diagram of an air conditioning system using the ice heat storage device of the present invention.

FIG. 3 shows the difference between the ice heat storage methods, (a) the internal melting method,
(B) Explanatory drawing of the external fusion type.

[Explanation of symbols]

1: water tank (heat storage layer), 2: heat exchanger, 3: air injection nozzle, 4: blower, 5: control device, 6: retained water, 7: brine introduction pipe, 8: brine discharge pipe, 9: heat radiation Brine pump, 11: brine refrigerator for heat storage, 12: brine pump, 13: brine water heat exchanger for heat dissipation, 14: brine water heat exchanger for tracking, 15: cold water pump for heat dissipation,
16: chasing cold water pump, EC: air conditioner, V ₁ ~V _4:
Switching valve

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yoshinao Hirabayashi 11-1 Haneda Asahimachi, Ota-ku, Tokyo Inside Ebara Works Co., Ltd. (72) Inventor Jun Aoyama 11-1 Haneda Asahi-cho, Ota-ku, Tokyo No. Ebara Corporation

Claims (5)

[Claims] 1. An internal melting type ice heat storage tank for flowing a heat medium into a heat exchanger installed in a vertical direction in a water tank to make and thaw the water in the water tank, and agitating the water in the water tank. An internal melting type ice heat storage device comprising: 2. The internal melting type ice heat storage device according to claim 1, wherein the means for stirring the water held in the water tank is an air injection nozzle provided at a lower portion or a side surface in the water tank. 3. The internal melting device according to claim 1, wherein the means for stirring the water held in the water tank is an injection device for injecting water taken out from a lower part or an upper part of the water tank from an upper part or a lower part in the water tank. Ice storage device. 4. The means for stirring the water held in the water tank includes:
A control mechanism for controlling a timing of starting or stopping stirring of the water held in the water tank, characterized by having a control mechanism.
4. The internal melting type ice heat storage device according to 2 or 3. 5. The means for stirring the water held in the water tank includes:
The internal melting type ice heat storage device according to any one of claims 1 to 4, further comprising a control mechanism for controlling an interval for intermittently stirring the water held in the water tank.