JPH0615243Y2 - Ice storage device for air conditioning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an ice heat storage device for air conditioning, which stores a cold heat source for cooling in the form of latent heat of ice.

[Conventional technology]

The so-called ice heat storage method, in which cold heat is stored in the form of latent heat by storing ice in a heat storage water tank for air conditioning, has two types of ice, solid (ice mass) and liquid (fine ice Suspended in water).

As is well known, when building air-conditioning is performed by the water heat source method, a large heat storage water tank that stores heat source water is constructed using an underground pit, etc., and this heat storage water tank stores cold heat or warm heat necessary for air conditioning. ing. In the case of performing the ice heat storage, there is no example in which such a heat storage water tank is used as it is in the liquid system. There is an example of using the heat storage water tank in the solid method, but in this case the IPF (filling rate of ice) is said to be around 10%, which is inefficient. In addition, there are examples in which a special solution or the like is used to generate ice blocks and examples in which the heat storage water tank is configured as a pressure vessel, but there are various problems in using a solid method using such a solution. ， It is very expensive to make a pressure vessel. On the other hand, if the liquid method is used, the IPF can be made very high, but in order to make a large amount of water into a sherbet, it is very difficult to realize it in the time zone when using midnight power or the like. It becomes a large-scale ice production facility.

As described above, the solid method and the liquid method have their respective merits and demerits, but as the latter liquid method for producing a so-called sherbet-like ice-water slurry, the applicant has already filed Japanese Patent Application No. 62-47770 and Japanese Patent Application No. 62-47770. -62681, Japanese Patent Application Sho 62
-102994, Japanese Patent Application No. 62-228800, Japanese Patent Application No. 62-245930,
Practical application 62-30383, Practical application 62-181176-8, Practical application 62-1
92012, etc., a liquid suitable for heat storage in which fine ice is dispersed by producing supercooled water cooled to below 0 ° C as a continuous flow and instantly releasing the supercooled state of this continuous flow We have proposed an invention for producing ice cream.

Japanese Unexamined Patent Publication No. 62-147271 teaches that supercooled water can be obtained by cooling while maintaining a fluid state such that the flow velocity of water on the cooling heat transfer surface becomes a predetermined value or more.

[Purpose of device]

The purpose of the present invention is to use an ordinary large-scale heat storage water tank constructed in an underground pit of a building as a liquid ice storage tank as it is, when needed (in the cooling season).

[Constitution of device]

In order to achieve the above-mentioned object, the gist of the present invention is that in addition to the main heat storage water tank for storing heat source water for air conditioning, a smaller auxiliary heat storage water tank is installed separately, and the water surface of this auxiliary heat storage water tank is substantially A pipe for supplying water from the main heat storage water tank is formed so as to be maintained at a constant level, and a water cooler is installed to continuously cool the water to supercooled water below 0 ° C. Is provided with means for releasing the supercooled state of the supercooled water continuously taken out from the water cooler, and the means for releasing the supercooled state is provided. It is characterized in that a path for supplying the fluid, which has become ice-water slurry through the above, to the main heat storage water tank is provided with or without an excess means.

That is, in the present invention, a device for producing fine ice, including an auxiliary heat storage water tank, a water cooler, and a supercooling state releasing device, is installed in the machine room separately from the main heat storage water tank, and the main heat storage water tank in the machine room is mainly installed. A part of the water in the heat storage water tank is supplied and the seabed-shaped ice made is transported to the main heat storage water tank.

It is preferable that the ice-water slurry obtained by separating water as much as possible from the solid-liquid mixed liquid that has become the ice-water slurry by the supercooling state releasing device and transporting the concentrated ice-water slurry to the main heat storage water tank is used. It is convenient to use a mono pump having some or all of the parts made of a material having a large number of pores. That is, water is separated from the pores as much as possible in the feeder, the separated water is returned to the auxiliary heat storage water tank, and the concentrated ice-water slurry is conveyed to the main heat storage water tank by this mono pump.

〔Example〕

FIG. 1 is an embodiment showing the whole of the ice heat storage device for air conditioning of the present invention, and 1 is a main heat storage water tank. The main heat storage water tank 1 is a normal water tank installed in the underground or the like for air conditioning of a heat source of a large building, and is a large heat storage water tank configured to store cold water in the cooling season and hot water in the heating season. According to the present invention, such a large-sized heat storage water tank is used as it is to store fine sherbet-like ice.

In the present invention, in addition to such a main heat storage water tank 1, a small auxiliary heat storage water tank 2 is installed in a machine room or the like. Then, a part of the heat source water in the main heat storage water tank 1 is supplied to the auxiliary heat storage water tank 2 by the pump 3 via the pipe line 4. At that time, the liquid level detector 5 was attached to the auxiliary heat storage water tank 2 and the indicated value was adjusted to the controller 6
Then, the pump 3 is controlled so that the indicated value falls within the set value range, and the water surface in the auxiliary heat storage water tank 2 is maintained substantially constant.

A water cooler 7 is installed in the same machine room as the auxiliary heat storage water tank 2, and the water in the auxiliary heat storage water tank 2 is supplied to the water cooler 7 through a water supply line 8.
And continuously supplied by the pump 9. As the water cooler 7, for example, a shell-and-tube heat exchanger configured to allow water to pass through the inside of the multiple heat transfer tubes 10 can be used. That is, the shell 11 is partitioned by partition plates 12 and 13 to form a cooling chamber 14, and a large number of heat transfer tubes are provided in the cooling chamber 14.
The water is passed through the heat transfer tube 10 and the coolant is supplied to the cooling chamber 14 outside the tube to cool the water continuously flowing through the tube to below 0 ° C. At that time, the refrigeration cycle is configured so that the cooling chamber 14 functions as an evaporator of the heat pump. That is, a refrigerant pipe is provided between the compressor 15, the condenser 16, the expansion valve 17, and the evaporator of the cooling chamber 14, and the pressure of the refrigerant evaporated in the cooling chamber 14 is maintained constant, so that each heat transfer pipe
The 10 can be cooled to a constant temperature below 0 ° C.
It should be noted that instead of such a refrigeration cycle, a configuration may be employed in which brine of a predetermined temperature is supplied from the refrigerator to the cooling chamber 14. The inventors of the present invention previously disclosed in Japanese Patent Application No. 62-271922, if the heat transfer tube 10 is cooled to a temperature at which the tube wall temperature in contact with water does not fall below minus 5.8 ° C (below 0 ° C), It was clarified that the supercooled water can be continuously produced regardless of the Reynolds number (that is, the flow velocity and pipe diameter), the water temperature before cooling, the water temperature after cooling, and so on. Therefore, also in the present invention, the temperature of the inner wall of the heat transfer tube 10 in the water cooler 7 is controlled to a temperature not lower than −5.8 ° C. at any point (however, 0 ° C. or lower). In this way, the heat transfer tubes 10 in the water cooler 7 do not freeze and the discharge port of each heat transfer tube
Supercooled water is withdrawn as a continuous stream from 18.

The water cooler 7 is installed at a position higher than the water surface of the auxiliary heat storage water tank 2, discharges the supercooled water from the discharge port 18 of the water cooler 7 into the atmosphere, and releases the supercooled water in the dropping process. Is preferable in actual operation, and in the illustrated example, a two-stage inclined gutter is used as this supercooled state releasing device. That is, the primary gutter
The supercooled water is given a shock to the supercooled water in response to the discharge and drop flow of the supercooled water, and a time for releasing the supercooled state is given in the flow process in the trough 19. Moreover, if the discharge and drop flow collides with the gutter and flows quickly downstream after the gutter 19 is appropriately inclined, it is possible to prevent the ice lump from growing at the collision position and to drop the ice mass. It is also possible to prevent the growth of ice (the rise of icicles) from going back to the flow of supercooled water that comes. And this primary gutter
By further providing the secondary gutter 20 below the super-cooled state, the release of the supercooled state becomes more complete, and when it flows out from the secondary gutter 20, it becomes a shovel-like fluid in which fine ice is dispersed in water.

This shovel-shaped ice-water slurry can be directly conveyed to the main heat storage water tank 1, but in order to further improve the ice making efficiency and the heat storage efficiency, the slurry concentrated by separating the water in the slurry as much as possible is mainly used. It is preferable to convey to the heat storage water tank 1. For this reason, in the illustrated embodiment, the mono pump 21 having an excessive function is used as a slurry conveying device.

FIG. 2 shows an example of the improved mono pump according to the present invention. As is well known, the mono pump has a stator 22
The meandering rotor 23 is inserted in the inside, and the meandering rotor 23 is rotated around the axis to continuously shift the gap generated between the stator 22 and the stator 22 in the axial direction. By supplying, it fulfills a transport function (pump function). Reference numeral 24 denotes a fluid feeder portion. In the present invention, a part or all of the casing constituting the feeder portion 24 is made of material. In the illustrated example, the bottom plate and the side plates of the feeder section 24 are formed of a porous metal plate 25 having pores. That is, when the ice-water slurry fluid is supplied to the feeder portion 24, water leaks from the pores of the feeder portion 24 while the fluid is retained there. This makes the meandering rotor 23
The slurry supplied to is a concentrated slurry with a reduced amount of water, and this concentrated slurry is discharged.

As shown in FIG. 1, this concentrated slurry is conveyed to the main heat storage water tank 1 via the pipeline 26, while the water leaked from the feeder section 24 is returned to the auxiliary heat storage water tank 2. As a result, the main heat storage water tank 1 stores fine ice with a high ice density,
Water near 0 ° C. is returned to the auxiliary heat storage water tank 2.

[Action effect]

According to the present invention, even in a large-capacity main heat storage water tank, a certain amount of water is retained in a small-capacity auxiliary heat storage water tank at a fixed amount, and this small amount of retained water is circulated in a water cooler. Since the supercooled water is continuously produced, the ice making efficiency becomes very good, and the power of the pump 3 for pumping from the main heat storage water tank to the auxiliary heat storage water tank becomes very small. And
The produced fine ice can be supplied to the main heat storage water tank in a state where the ice density is high. Therefore, for example, even when the device of the present invention is operated by using nighttime electric power, it is possible to supply ice having a sufficiently high density to the large-capacity main heat storage water tank during the short time period. On the other hand, in the auxiliary heat storage water tank,
By returning the water separated from the slurry near zero degrees Celsius, the low-temperature water will be retained at all times, so it is sufficient to produce supercooled water from this low-temperature water, thus improving the ice-making efficiency. . In addition, the present invention makes it possible to use the existing water storage tank for heat source water, which was not originally intended for the already built ice storage, as an ice storage water tank, and achieves the ice storage by the liquid ice method. The excellent effect of being able to do is exhibited.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the device layout of the device of the present invention, and FIG.
The figure is a schematic cross-sectional view of an improved mono pump according to the present invention. 1 ... Main heat storage water tank, 2 ... Auxiliary heat storage water tank, 3 ... Pump, 4 ... Water supply pipe to the auxiliary heat storage water tank, 5 ... Liquid level detector, 6 ... Controller, 7 ... Water cooling Water tank, 8 ... Water supply pipe from the auxiliary heat storage water tank to the water cooler, 9 ... Pump, 19, 20 ...
… Inclined gutter (supercooling state release device), 21 …… Mono pump, 24 …… Feed part of mono pump, 25 …… Casing the feeder part with pores.

Claims (3)

[Scope of utility model registration request] 1. A main heat storage water tank for storing heat source water for air conditioning is separately installed, and a smaller auxiliary heat storage water tank is separately installed from the main heat storage water tank so that the water surface of the auxiliary heat storage water tank is maintained substantially constant. A water cooler that forms a pipe for supplying water and continuously cools the water to supercooled water below 0 ° C is installed, and the water in the auxiliary heat storage water tank is continuously supplied to this water cooler. A means for releasing a supercooled state of the supercooled water continuously formed from the water cooler by forming a pipe is provided, and the fluid which becomes ice-water slurry is passed through the supercooled state releasing means. A heat storage device for air conditioning, which is provided with a path to supply to the main heat storage water tank. 2. A main heat storage water tank for storing heat source water for air conditioning is separately installed, and a smaller auxiliary heat storage water tank is installed separately from the main heat storage water tank so that the water surface of the auxiliary heat storage water tank is maintained substantially constant. A water cooler that forms a pipe for supplying water and continuously cools the water to supercooled water below 0 ° C is installed, and the water in the auxiliary heat storage water tank is continuously supplied to this water cooler. A means for releasing the supercooled state of the supercooled water continuously formed from the water cooler by forming a pipe is provided, and the fluid which has become ice-water slurry is passed through the supercooled state releasing means. A heat storage device for air conditioning, which is provided with a means for supplying the excess water to the auxiliary heat storage water tank and a path for supplying the concentrated ice-water slurry to the main heat storage water tank. 3. A utility model registration request in which concentrated ice-water slurry is supplied to a main heat storage water tank by a mohno pump, and part or all of the fluid feeder of the mohno pump is made of a material having a large number of pores. A heat storage device for air conditioning as set forth in claim 2.