JPH07127887A - Ice heat accumulation system allowing use of pi-treated water - Google Patents

Abstract

PURPOSE:To provide an ice heat accumulation system for producing ice, which is not frozen into a block shape, by a simpler system constitution. CONSTITUTION:An ice heat accumulation system has a heat storage tank 1, a compressor 6, a condenser 7 and an expansion valve 5 provided along a path for constituting a closed loop. The heat storage tank 1 is filled with pi-treated water 20. When the pi-treated water 20 is cooled, sherbet-like ice is gradually produced after a temperature reaches a level below the freezing point.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an ice heat storage system.

[0002]

2. Description of the Related Art As the demand for air conditioners increases, the power consumption during the daytime in summer temporarily peaks rapidly, and the expansion of power supply sources is rushed. However, increasing the capacity of the power supply source at the peak of power consumption
This is not preferable because the operating rate of the power supply source decreases during the time when the power consumption is low. Therefore, it is necessary to take measures to reduce the amount of power consumed by the air conditioner during the time when the power consumption reaches its peak.

As one of the methods, an attempt has been made to store cold heat during a time period when the power consumption is low and use the cold heat during the time period when the power consumption increases to function the air conditioner. Since this cold heat is used in the air conditioner, it is not necessary to keep it at an extremely low temperature, and water is generally used as the heat storage material in many cases. Water has a large heat capacity,
Also, since it is easy to handle, it is suitable as a heat storage material, but it is further required to make the heat storage tank smaller by utilizing latent heat of ice. For that reason
Demand for ice heat storage systems is increasing.

The ice heat storage system is for cooling the water stored in the heat storage tank with cold heat to freeze it, and when the cold heat is required, it works as a cooling system by the latent heat of melting of ice. Figure 4 shows the concept of this ice storage system. Heat storage tank 1
The water 2 is stored in the heat storage tank 1, and the water 2 can be exchanged with the refrigerant 4 by the heat storage heat exchanger 3 in the heat storage tank 1. The refrigerant 4 repeats expansion and compression and bears heat transfer. When the cold storage is performed, the refrigerant 4 is circulated counterclockwise in the figure, and the expansion valve 5 vaporizes the temperature of the refrigerant 4 to lower the temperature thereof. Lower.

Next, it is compressed by the compressor 6, then liquefied by the condenser 7 to lower the temperature, and sent to the expansion valve 5. By continuing this circulation, the water 2 freezes,
It can store cold heat as ice.

When the room 9 is cooled using cold heat,
The water 2 in the heat storage tank 1 is heated by the pump 10 for air conditioning heat exchanger.
Cycle to lead to 11. At this time, the heat exchanger for air conditioning 11
Through this, the air in the room 9 is cooled.

As described above, the ice heat storage system can store the ice by the surplus electric power and operate the air conditioner with a slight pump power when the room 9 needs to be cooled.

[0008]

The water 2 stored in the heat storage tank 1 as described above repeats heat storage and heat dissipation due to solidification and melting. At the time of solidification, solidification starts from water in contact with the surface of the cold storage heat exchanger 3 through which the refrigerant 4 passes,
Ice grows over the heat exchanger. The grown ice becomes a heat transfer resistance between the water 2 and the refrigerant 4, and thus deteriorates the heat exchange performance as the solidification progresses. Moreover, the surface area of the heat exchanger is increased by providing fins or forming a spiral shape to improve the heat flux, and the effect is not improved because the ice covers the heat exchanger body in a lump.
These drawbacks are similar when the ice melts.

In order to prevent such deterioration of heat exchange performance due to ice growth, attempts have been made to renew the heat transfer surface. For example, some freons form the core of the water molecule lattice,
A clathrate compound is produced, but since the binding force between the clathrate compounds is weak, the compound produces sherbet-like ice. Therefore, when such a CFC coexists in the heat storage tank, the generated ice becomes sherbet-like and is separated from the heat exchanger 3, and the heat transfer surface is updated. However, since CFCs are difficult to dissolve in water, it is difficult for them to coexist on the heat transfer surface.

Further, a method has been attempted in which heat is exchanged by bringing water and a refrigerant into direct contact with each other to improve a heat transfer area and prevent ice from being generated from a specific heat transfer surface. By directly ejecting CFC, which is a refrigerant, into water, an inclusion compound can be formed with water to form sheared ice. However, in order to generate the clathrate compound, the pressure is limited within a certain range, so that it is difficult to control the pressure of the refrigerant circulating through the water. Furthermore, achieving the separation of water and refrigerant is also an issue.

It is also possible to make a sherbet-like shape by making a small amount of ice around the refrigerant blown out into water without making an inclusion compound, but the sherbet-like ice floating on the water surface is hard. There are many problems such as crystallization and difficulty in separating water and refrigerant. Therefore, an object of the present invention is to provide an ice heat storage system that produces ice that does not solidify in a lump with a simpler system configuration.

[0012]

The ice heat storage system according to the present invention is characterized in that water is made into π.

[0013]

By making the water π, the water in the ice heat storage tank can be frozen in a sherbet form and the heat storage medium can be made into a slurry form consisting of water and ice. Slurry ice generated in the heat storage tank does not solidify to cover the heat exchanger for cold storage and has fluidity, so it quickly separates from the heat exchanger,
The heat transfer performance can be improved.

[0014]

[Examples] It is known that the physical properties of water are changed by subjecting water to π treatment ("The Secret of Amazing Water π Water" by Setsuo Iino, Hyundai Shorin, 1991). The water that has been π-ized has the property of forming a sherbet when frozen.

The ice heat storage system according to the present invention is characterized in that π-treated water is used as water in the heat storage tank. FIG. 1 (first
Item) shows an ice heat storage system according to the present invention. The heat storage tank 1 is filled with π-treated water 20. Other configurations are the same as those of the conventional ice heat storage system. When the π-treated water 20 is cooled,
After the temperature reaches below freezing, sherbet-like ice is gradually generated. Sherbet-shaped ice is unfrozen π-treated water
It becomes a slurry with 20 and has fluidity.

An embodiment according to the present invention (section 2) is shown in FIG. The heat treatment tank 1 is provided with a π-ized processing device 21. As a result, the water 2 in the heat storage tank 1 can be changed to π-treated water. Other configurations are the same as those in FIG.

The water 2 cooled by the circulation of the refrigerant 3 becomes sherbet-like ice and becomes fluid with the uniced water in the form of slurry. Further, in this configuration, when the effect of the π-ized processing is weakened, the π-ized processing can be performed if necessary. Further, since it is possible to continuously subject the water to π conversion, it is possible to improve the reliability of π conversion of water.

An embodiment according to the present invention (section 3) is shown in FIG. A π-ized processing device 21 is provided outside the heat storage tank 1. The water 2 is guided from the heat storage tank 1 to the π-ized processing device 21, and after the π-ized processing, the water is returned to the heat storage tank 1. As a result, the water 2 in the heat storage tank 1 can be changed to π-treated water. Other configurations are shown in FIG.
Is the same as. The water 2 cooled by the circulation of the refrigerant 3 becomes sherbet-like ice, and becomes slurry with the unfrozen water to become fluid. Also in this configuration, when the effect of the π-ized processing is weakened, the π-ized processing can be performed as necessary. Further, since it is possible to continuously subject the water to π conversion, it is possible to improve the reliability of π conversion of water. Furthermore, it becomes easy to replace the π-ized processing device.

By making the water in the heat storage tank π in this way, it is possible to suppress the formation of lumpy ice, which was a drawback of the ice heat storage system, constantly update the heat exchange surface, and improve the heat exchange performance.

[0020]

As described above, according to the present invention, since the water is made into π, the water in the ice heat storage tank can be frozen in the form of slurry, and is formed on the surface of the heat exchanger for cold storage during cold storage. The ice that forms is easily separated from the heat exchanger, and the surface of the heat exchanger can be constantly updated. Therefore, the heat exchange performance of the ice heat storage system can be improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of an ice heat storage system according to the present invention.

FIG. 2 is a configuration diagram showing an embodiment of an ice heat storage system according to the present invention.

FIG. 3 is a configuration diagram showing an embodiment of an ice heat storage system according to the present invention.

FIG. 4 is a conceptual diagram showing an example of a conventional ice heat storage system.

[Explanation of symbols]

 1 ... Heat storage tank 2 ... Water (ice) 3 ... Heat storage heat exchanger 4 ... Refrigerant 5 ... Expansion valve 6 ... Compressor 7 ... Condenser 9 ... Room 10 ... Pump 11 ... Air conditioning heat exchanger 20 ... Water (ice) 21… π-processing equipment

Claims (3)

[Claims] 1. An ice heat storage system for storing cold heat by utilizing latent heat of solidification of water, wherein the water is made into π. 2. An ice heat storage system for storing cold heat by utilizing latent heat of solidification of water, wherein an ice heat treatment system is provided in an ice heat storage tank. 3. An ice heat storage system for storing cold heat by utilizing latent heat of freezing of water, comprising a mechanism for returning water introduced from the ice heat storage tank to the ice heat storage tank through a π-ized processing device. Ice heat storage system.