JPH06300326A - Chilled water extracting device for ice cold reservoir - Google Patents

Abstract

PURPOSE:To extract chilled water by utilizing latent heat of shervetlike ice by dispersively disposing extraction nozzles and return nozzles in an ice cold reservoir. CONSTITUTION:A plurality of extraction nozzles 4 for chilled water 3 to be supplied to a load side are dispersively disposed at a lower part of an ice cold reservoir 1. Return nozzles 6 of the same number as that of the nozzles 4 are dispersively disposed at an end of a return conduit 7 of a load side at an upper part of the reservoir 1. The nozzles 6 sprinkle water in a spray state to disperse return water in a wide range to extend a melting range of shervetlike ice 2 thereby to uniformly thaw it, Thus, the nozzles 6, 4 are disposed to generate a water flow 9 through a layer of the ice 2 at many places without generating deviated water passage to cool the return water by utilizing latent heat at the time of thawing the ice to be supplied to a load side. As a result, the ice 2 in the reservoir 1 is thawed substantially in a uniform layer thickness in an entirety in the reservoir and thinned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for taking out cold water while uniformly defrosting the latent heat of ice stored in an ice heat storage tank.

[0002]

2. Description of the Related Art In recent years, the demand for electric power has increased sharply, and in summer, the imbalance between the demand for electric power in the daytime and the demand for electric power in the nighttime has become remarkable due to the cooling load. As one of the measures, there is a method of averaging the power demand day and night by storing cold heat by using surplus power at night and extracting this cold heat in the daytime and using it as a cooling load. This cold heat storage system includes a cold water heat storage system and an ice heat storage system, but an ice heat storage system capable of storing heat in a more space-saving manner is attracting attention in terms of efficient use of equipment space.

Up to now, various ice making methods have been developed and proposed in the ice making system in the ice heat storage device. There are roughly two types of ice making methods, static and dynamic.The static method is to grow ice by depositing ice on the heat transfer surface of the heat exchanger for ice making. The thermal resistance increases and the ice making efficiency decreases.

On the other hand, in the dynamic system, the ice deposited on the heat transfer surface of the ice making heat exchanger is intermittently peeled off, or supercooled water is produced to make ice without adhering to the heat transfer surface. Therefore, the heat exchange efficiency at the time of ice making is superior to that of the static method, and because the shape of the ice produced is small, it is possible to perform cooling during the daytime using ice that has accumulated heat at night. You can quickly follow the load.

The ice obtained by this dynamic method is a fine ice particle of several microns to several millimeters, which is mixed with water (sherbet-like) and floats above the ice heat storage tank to store ice. Conventionally, when the cold water in the ice heat storage tank is used for a load such as cooling, as shown in FIG. 2, the cold water 3 is taken out from a take-out nozzle 4 provided in the lower portion of the ice heat storage tank 1 through a pipe line 5, and load side heat is taken. The warmed return water supplied to the exchanger (not shown) was discharged from the return pipe 7 to the upper part of the ice heat storage tank 1.

[0006]

However, according to the conventional cold water extraction method, a sherbet in which a water channel 8 is formed in a line connecting the discharge water device of the return pipe 7 and the extraction nozzle 4 of the cold water 3 for storing ice. 8 without thawing ice 2
Sherbet-shaped ice 2
It was not possible to use the cold water in the ice storage tank 1 cooled by the latent heat of 1), and it was not possible to obtain sufficiently cooled cold water. An object of the present invention is to solve the drawbacks of the conventional cold water extraction method and to provide a cold water extraction device that effectively utilizes the latent heat of the sherbet ice 2.

[0007]

The gist of the present invention is as follows. An ice heat storage tank characterized in that a large number of extraction nozzles for taking out cold water to be supplied to the load side are dispersedly arranged in the lower part of the ice heat storage tank, and a large number of return nozzles for spraying water are dispersedly arranged above the ice heat storage tank. This is a cold water extraction device.

[0008]

Operation: That is, a large number of extraction nozzles are dispersedly arranged in the lower part of the ice heat storage tank, and a plurality of return nozzles for spraying water are dispersedly arranged in the upper part of the ice heat storage tank so that the water flow between the return water and the extraction water is sherbet-like. Disperse in many places via the ice layer to generate many water streams and use the latent heat of sherbet-like ice in this water stream (cooling return water by melting ice)
In addition, the return water is sprayed from the upper part of the sherbet-like ice in the form of a spray so as to make the defrosting uniform.

[0009]

FIG. 1 shows an embodiment of the present invention and is a cutaway three-dimensional view of an ice heat storage tank. A plurality of extraction nozzles 4 for extracting cold water 3 to be supplied to a load side such as a cooling unit (not shown) are arranged below the ice heat storage tank 1 so as to be dispersed. Further, in the upper part of the ice heat storage tank 1, the ones in which the same number of return nozzles 6 as the extraction nozzles 4 are provided at the end of the return pipe line 7 on the load side are dispersedly arranged. The return nozzle 6 is used to spray water in a spray form to disperse the return water sprinkled from one place in a wide range to widen the melting range of the sherbet-like ice 2 and uniformly dissolve the ice.

As described above, by arranging the return nozzle 6 and the withdrawing nozzle 4, the water flow 9 passing through the layer of the sherbet-like ice 2 is generated at a large number of places without causing uneven water flow, and The return water is cooled by utilizing the latent heat when the ice is thawed and supplied to the load side. As a result, when the sherbet-like ice 2 in the ice heat storage tank 1 is supplied to a load such as cooling, it is thawed and thinned with a substantially uniform layer thickness throughout the tank.

The number of withdrawal and return nozzles depends on the size of the ice heat storage tank, but it is necessary to have four or more places in the 10 m ² class, and it is necessary to increase the number as the size increases. In this embodiment, the extraction nozzles and the return nozzles are arranged in the same number and in the same upper and lower positions, but it is not always necessary to arrange them in the same number, and the arrangements may be staggered or random to some extent.

[0012]

According to the present invention, a large number of withdrawal nozzles for taking out cold water to be supplied to the load side are dispersedly arranged in the lower portion of the ice heat storage tank, and a plurality of return nozzles for spraying water are dispersed in the upper portion of the ice heat storage tank. Since the cold water take-out device of the ice heat storage tank is characterized by being arranged, the sherbet-like ice is uniformly thawed, and cold water efficiently utilizing the latent heat of the ice can be obtained.

[Brief description of drawings]

FIG. 1 is a cutaway perspective view of an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Ice heat storage tank 2 Sherbet-like ice 3 Cold water 4 Extraction nozzle 5 Pipe line 6 Return nozzle 7 Return pipe line 8 Water channel 9 Water flow

Claims (1)

[Claims] 1. A large number of extraction nozzles for taking out cold water to be supplied to a load side are dispersedly arranged in a lower portion of the ice heat storage tank, and a plurality of return nozzles for spraying water are dispersedly arranged at an upper portion of the ice heat storage tank. Cold water extraction device for ice storage tanks.