JPH0590226U - Ice slurry storage tank - Google Patents

Abstract

(57) [Summary] [Objective] Cooling water cooled by ice particles at a temperature of about 0 ° C is transported efficiently, and in addition, clogging caused by ice deposits on the transportation line can be prevented. Provided is an ice slurry storage tank capable of improving efficiency. [Structure] A cold water extraction pipe L ₂ is connected to a lower portion of the tank body 12 for storing ice slurry, and the tank body 12 is
An ice slurry storage tank in which a separating plate 13 is arranged at a predetermined distance H from the bottom plate 12a.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an ice slurry storage tank, and more particularly, to an ice slurry storage tank used when cold water is taken out from an ice slurry stored in the tank and is transported for cooling.

[0002]

[Prior Art]

BACKGROUND ART Conventionally, so-called district heating and cooling is known in which a heat source obtained by an air conditioning unit is supplied to a large number of consumers in a predetermined area. Then, in this district heating and cooling, it has been proposed to store the ice slurry produced at night as a heat source for cooling, in an ice slurry storage tank, and use this cold heat during daytime demand. To explain one example, as shown in FIG. 8, the ice slurry containing ice particles of about 100 μm to 5 mm produced by the ice making machine 1 at night is sent from the line L ₁ to the ice slurry storage tank 2 where Stored. Then, at the time of demand for cold heat in the daytime, the slurry pump 3 is operated to send the ice slurry from the line L ₂ to the heat exchangers 4a, 4b arranged at the heat source center, where the heat of the air conditioning systems 5a, 5b owned by the customer is transferred. It exchanges heat with the medium to become water of about 13 ° C., which is introduced into the adjusting tank 6 through the line L ₃ and stored. Then, at night, the pump 7 is operated again to supply the water in the adjusting tank 6 to the ice making machine 1 through the line L ₄ .

[0003]

[Problems to be solved by the device]

By the way, in the cold heat transfer in the district heating and cooling described above, there arises a problem that when the IPF (ice filling rate) of the ice slurry storage tank 2 becomes high, the ice particles adhere and accumulate in the line L ₂ to cause clogging. Therefore, the value of IPF could not be increased.

[0004]

[Means for Solving the Problems]

 The present invention has been made to solve the above-mentioned problems of the prior art.A cold water take-out pipe is connected to a lower portion of a tank body that stores ice slurries, and a predetermined space is provided from a bottom plate in the tank body. It is intended to provide an ice slurry storage tank on which a separating plate is placed.

As the separating plate, a perforated plate having small holes with a diameter of about 3 to 15 mm or a wire mesh is stretched over the entire surface in the horizontal direction. The distance H between the surface of the separating plate and the bottom surface of the tank body is about 100 to 300 mm.

[0006]

[Work]

 According to the ice slurry storage tank having the above structure, the ice slurry produced by the ice maker is supplied onto the separating plate, and only the cold water in the ice slurry is stored in the lower part through the small holes of the separating plate. The cold water stored in the lower part of this separator is supplied to the heat exchanger by a pump when cold demand is made.

[0007]

【Example】

An embodiment of an ice slurry storage tank according to the present invention will be described below with reference to FIGS. 1 to 3. In this figure, the ice slurry produced by the ice maker 11 at night is supplied and stored in the ice slurry storage tank 12 through the line L ₁ . As shown in FIG. 2, a predetermined height H (usually about 100 to 300 mm) is placed in the ice slurry storage tank 12 from the bottom plate 12a, and a perforated plate having small holes of 3 to 15 mmφ, for example. Alternatively, a separation plate 13 made of wire mesh or the like is stretched.

Then, the ice slurry supplied into the ice slurry storage tank 12 has an ice slurry layer 14a formed on the upper side and a cold water layer 14b formed on the lower side by the separating plate 13. The cold heat thus stored in the ice slurry storage tank 12 is supplied to the heat exchangers 16a and 16b through the line L ₂ by operating the pump 15 at the time of daytime demand. The heat is exchanged with the heat medium of 17a and 17b, the temperature is raised, and water of about 13 ° C. is introduced into the adjusting tank 18 through the line L ₃ . Then, the pump 19 is operated to be supplied to the ice slurry layer 14a from the line L _4, cooled by the ice slurry to become cold water of approximately 0 ° C., and flows into the cold water layer 14b.

When the cold heat is supplied to the heat exchangers 16a and 16b in this way, the ice particles in the ice slurry in the ice slurry storage tank 12 are melted, and the boundary between the ice slurry layer 14a and the cold water layer 14b is sequentially formed. Layer 14c rises as shown in FIG. In this way, the cold heat transfer is continued, and if the ice slurry layer 14a is replaced with the cold water layer 14b and the temperature thereof reaches about 6 ° C., the valve 20 arranged in the line L ₅ is opened. Then, the pump 21 and the ice maker 11 are operated to introduce the water in the ice slurry storage tank 12 into the adjusting tank 18, and then supply it to the ice maker 11 to produce the ice slurry, and the ice slurry storage tank. It will be sent to 12 for cold heat supply.

Of course, when the ice slurry is stored in the ice slurry storage tank 12 at night, the same cycle as the above-mentioned cold heat supply method is constituted. The height H of the separating plate 13 provided below the ice slurry storage tank 12 is selected to be as small as possible within the range of, and at the start of cold heat transfer, at least the boundary layer 14c between the ice slurry layer 14a and the cold water layer 14b is separated by this separating plate. It is better to choose to be equal to or higher than 13.

[0011]

[Effect of the device]

 The ice slurry storage tank of the present invention comprises a cold water outlet pipe connected to a lower portion of a tank body for storing ice slurry, and a separator plate disposed in the tank body at a predetermined distance from a bottom plate. Therefore, since the cooling water from which the ice particles have been removed is transported to the ice maker, the operation efficiency is good. In addition, since it is possible to prevent clogging due to the adhesion and accumulation of ice on the transportation line, a large amount of ice can be stored in the ice slurry storage tank. These effects have the effect of improving the operating efficiency of district heating and cooling.

[Brief description of drawings]

FIG. 1 is an overall system diagram of district heating and cooling in one embodiment of an ice slurry storage tank according to the present invention.

FIG. 2 is a side sectional view of an ice slurry storage tank.

FIG. 3 is a diagram illustrating the operation of an ice slurry storage tank.

FIG. 4 is a system diagram of a conventional cooling system using ice slurry.

[Explanation of symbols]

1, 11 Ice maker 2, 12 Ice slurry storage tank 3 Slurry pump 4a, 4b, 16a, 16
b Heat exchanger 5a, 5b, 17a, 17b Air conditioning system 6, 18 Adjustment tank 7, 15, 19, 21 Pump 13 Separation plate 14a Ice slurry layer 14b Cold water layer 14c Boundary layer 19 valve

Claims (1)

[Scope of utility model registration request] 1. An ice slurry storage tank characterized in that a cold water extraction pipe is connected to a lower portion of a tank body for storing ice slurry, and a separating plate is arranged in the tank body at a predetermined distance from a bottom plate.