JP5081009B2 - Method for setting height position of supply port in method for supplying ice / water slurry and method for supplying ice / water slurry - Google Patents

Description

The present invention relates to an ice / water slurry for storing a large amount of ice uniformly in an ice heat storage tank in a so-called dynamic ice heat storage system for storing so-called sherbet-like ice in a food factory, for example. This invention relates to a method for setting the height position of a supply port and a method for supplying ice / water slurry.

  In food factories and dairy products-related factories, so-called chilled cold water, for example, low-temperature cold water of 0 ° C. to 1.5 ° C., for example, is used. Among dynamic ice heat storage systems with good ice-breaking characteristics, those utilizing the water supercooling phenomenon are promising as ice bank systems for producing and supplying chilled cold water in food factories and the like. In this ice bank system, in order to maintain a so-called chilled cold water temperature of 0 ° C. to 1.5 ° C., an operation in which a remaining ice amount (minimum ice storage amount) is set is required. Therefore, in particular, in order to make the ice storage tank compact, it is required to store ice uniformly in the ice storage tank and store a large amount of ice at a high density.

  In an ice heat storage system that utilizes the supercooling phenomenon of water, as a technology related to uniform ice storage, the uniform ice-water slurry produced by completing the phase change from the supercooled water in a basic single tank Prior art that contributes to ice storage is to homogenize the distribution of ice storage by agitating the water area with an underwater pump or the like in an ice heat storage device (Patent Document 1), and the collapse of sedimentary ice by water injection in the ice heat storage device (Patent Document 2) disperses the ice storage state.

Japanese Patent Laid-Open No. 5-288373 JP-A-6-129676

  However, the above-mentioned conventional techniques are all countermeasures and do not take into account the ice storage mechanism. Therefore, the ice cannot be stored uniformly in the spreading direction in the tank, and the density is high. It was difficult to reliably store a large amount of ice.

  The present invention has been made in view of the above points, and in an ice heat storage tank in a dynamic type ice bank system, a large amount of ice is stored in a high density so that the ice is stored uniformly in the spreading direction. The purpose is that.

To achieve the above object, the present invention supplies ice / water slurry produced by a supercooler from a supply port of a supply pipe to the ice heat storage tank by discharging the ice / water slurry from below to above. In this case, the supply port is positioned on the water surface in the ice heat storage tank, and the ice swell height Hice in the ice heat storage tank at a predetermined ice storage rate in the ice heat storage tank is obtained, and the supply The water column height H corresponding to the dynamic pressure is obtained from the flow velocity of the ice / water slurry at the mouth, and the height obtained by subtracting the water column height H from the Hice is set as the height position on the water surface of the supply port. It is characterized by.

  Although details will be described later, according to the knowledge of the inventors, the ice / water slurry having a high fluidity supplied to the upper surface of the ice layer (sherbet-like ice layer) in the ice heat storage tank is a porous body. The water in the ice / water slurry permeates into the ice layer that can be regarded as flowing through the upper surface of the ice layer, and when the proportion of ice in the ice / water slurry increases and its fluidity is lost, (In fact, some of the ice is deposited when the water in the ice / water slurry flowing on the top of the ice layer penetrates into the ice layer. Experimental observations confirm that ice is accumulating). Therefore, by reducing the pressure of water penetrating into the ice layer (penetration potential) as much as possible and dispersing it in the horizontal spreading direction, it is possible to store ice uniformly in the spreading direction in the tank.

  In addition, the inventors compared the method of supplying ice / water slurry near the surface of the ice heat storage tank to store ice and the method of supplying ice / water slurry from the top of the ice heat storage tank to store ice. As a result, it was found that the ice layer is difficult to spread in the horizontal direction by the latter method, and the ice layer is raised and is in an uneven ice storage state.

  On the other hand, when supplying ice / water slurry to the vicinity of the water surface of the ice heat storage tank, it is preferable to supply the ice / water slurry upward because the penetration potential corresponding to the supply flow rate is eliminated. However, when ice / water slurry is supplied upward near the water surface of the ice heat storage tank, the ice layer that accumulates in the ice heat storage tank (the rising ice layer) is from the ice / water slurry supply port installed near the water surface. Increase blowing resistance of ice / water slurry. As a result, when the pressure of the supply pipe supplied to the ice heat storage tank rises and the plate type heat exchanger is used as a heat exchanger for producing supercooled water, the pressure difference between the plates decreases, and the supercooled water May be hindered. If the supply port is set below the surface of the water, the supply port may be blocked with ice as time passes.

  Therefore, it is desirable to install the ice / water slurry supply port above the water surface so as not to increase the blowing resistance of the ice / water slurry. However, when ice / water slurry is discharged upward from the supply port, an ice layer is not formed immediately above the supply port in the initial stage, but is formed around the supply port, but the ice layer gradually becomes higher. It is conceivable that the supply port will eventually be buried in the ice layer.

Therefore, in the present invention, the ice swell height Hice in the ice heat storage tank at a predetermined ice storage rate in the ice heat storage tank is obtained in advance, and based on the flow rate of the ice / water slurry at the supply port. The water column height H corresponding to the dynamic pressure was obtained, and the height obtained by subtracting the water column height H from the Hice was set as the height position of the supply port . As a result, from the height of the supply port to the height of the water column corresponding to the dynamic pressure, the flow path is secured by the ice / water slurry discharged from the supply port, and the flow resistance at the time of discharge increases, or the supply port itself is iced. It can prevent being buried in the layer. That is, in the full storage state near the design ice storage rate (IPF), a flow path is formed in the ice layer above the supply port due to the dynamic pressure of the ice / water slurry, and the blowing resistance of the ice / water slurry is increased. In addition, the osmotic potential can be reduced as much as possible. As a result, the ice easily spreads in the horizontal direction, and a uniform ice storage state can be realized in the spreading direction.

  The ice storage rate set in advance here means the ice storage rate (IPF) of ice determined to be stored in the ice heat storage tank at the design stage, and the ice rising height Hice is the ice rising at that time. This is the height of the formed ice (ice layer) from the water surface to the highest ice.

  According to the knowledge of the inventors, whether or not ice / water slurry flows and spreads over a wide area and can be uniformly stored is determined by the flow rate of the permeated water. The flow rate of the permeated water is determined by the ice layer (the rising ice layer) that accumulates in the ice heat storage tank. That is, it is determined whether or not ice / water slurry having a flow rate equal to or greater than the flow rate of permeated water can be uniformly stored in the horizontal section of the ice heat storage tank.

  Therefore, in the system design, as the planned design IPF is set higher and the ice heat storage tank having a deeper water depth, uniform ice storage becomes possible. In other words, the superficial velocity obtained by dividing the flow rate of the ice / water slurry supplied to the ice heat storage tank by the horizontal cross-sectional area of the ice heat storage tank becomes the criterion for uniform ice storage. However, there are cases where the shape of the tank is a given condition, such as when a space under the slab is used for an ice heat storage tank. In addition, from the viewpoint of the superficial velocity that is a criterion for this determination, even if the number of ice / water slurry supply ports is simply increased, uneven ice storage is not improved.

  Therefore, in the present invention, it can be proposed to add water taken from the ice heat storage tank to the ice / water slurry in the supply pipe to increase the flow rate of the ice / water slurry discharged from the supply port. .

  In such a case, the rising height of the ice in the ice storage tank is monitored, and when it exceeds a predetermined height, water taken from the ice storage tank is added, and the ice / water slurry discharged from the supply port is added. Increase the flow rate or monitor the temporal change in the rising height of the ice in the ice storage tank, and when the change exceeds a predetermined rate of change, add water taken from the ice storage tank. It can be proposed to increase the flow rate of the ice / water slurry discharged from the supply port.

  The height of the rise is measured, for example, by detecting the height of the top of the ice rising from the surface of the water using an ultrasonic height meter, laser range finder, or capacitance meter installed at the top of the ice storage tank. This can be done.

  According to the present invention, ice storage in an ice heat storage tank in a dynamic type ice bank system can be made uniform, particularly in the spreading direction, and a large amount of ice can be stored at high density. is there.

  Embodiments of the present invention will be described below. FIG. 1 shows an outline of an ice bank system that implements an ice / water slurry supply method according to an embodiment, and a hollow water intake made of punching metal or the like is formed in the lower part of the ice heat storage tank 1. Part 2 is provided. Water in the tank taken by the pump 4 through the first water intake pipe 3 communicating with the water intake unit 2 is sent to the supercooler 11, generated by the refrigerator 12, and supplied by the pump 14. Heat exchange with frozen brine is performed to produce supercooled water at 0 ° C. or lower. The subcooler 11 in the present embodiment employs a plate heat exchanger, but a shell and tube heat exchanger may also be used.

  The supercooled water produced by the supercooler 11 is sent to the supercooling releaser 13 to release the supercooled state, and becomes ice / water slurry, which is supplied into the ice heat storage tank 1 through the supply pipe 5. And stored in the tank. The supply pipe 5 in the present embodiment has a configuration that is arranged horizontally with respect to the inside of the tank and rises vertically at the center in the tank, and the opening at the tip thereof becomes the supply port 5a. Accordingly, as shown in FIG. 2, the ice / water slurry S is spouted vertically from the supply port 5a of the supply pipe 5, and sherbet-like ice is deposited around the ice / water slurry S to form an ice layer P.

  The cold water in the tank taken by the pumps 22a to 22c through the second intake pipe 21 communicating with the intake part 2 is sent to the cooling load 24 through the water supply pipe 23 as chilled cold water. The raised return water from the cooling load 24 is supplied into the ice heat storage tank 1 through the return water pipe 25. The outlet 25a in the tank of the return water pipe 25 is located 100 to 200 mm below the water surface in the tank. For example, as a jet nozzle configuration, the return water is jetted horizontally from the side toward the ice layer P. The ice layer P is melted and deiced.

  The water pipe 23 is provided with a flow meter 26 that measures the flow rate of chilled cold water and a temperature sensor 27 that measures the temperature of chilled cold water. The return water pipe 25 is also provided with a temperature sensor 28 for measuring the temperature of the return water. By these, the integrated value of the supplied cold heat amount supplied to the cooling load 24 can be measured.

  A bypass pipe 29 is provided between the second intake pipe 21 and the return water pipe 25, and a flow rate control valve 30 is provided in the bypass pipe 29.

  Above the ice heat storage tank 1, an ultrasonic height meter 31 is provided that detects the rising height of the ice on the water surface by transmitting ultrasonic waves toward the ice layer P in the ice heat storage tank 1. Yes. This ultrasonic height meter 31 measures the distance to an object by, for example, transmitting ultrasonic waves to the object, measuring the intensity of the reflected wave or transmitted wave from the object, the propagation time, etc. It is. The destination, that is, the point at which the height is measured, is preferably set at a location where the ice layer (ice) is the thickest and close to the supply port 5 a of the supply pipe 5. Specifically, for example, a location approximately 30 cm away from the supply port 5a in the horizontal direction is appropriate. This is to prevent the measurement point from being influenced by the flow of the ice / water slurry S that blows upward because the measurement point is too close to the supply port 5a.

  Note that the IPF of the ice layer P in the ice heat storage tank 1 can be measured by measuring the rising height of the ice layer P with the ultrasonic height meter 31. When the inventors actually verified the relationship between the amount of ice storage and the rising height of ice using a model case, the rising height of ice when the IPF was 20% was about 260 ± 25 mm, and the IPF was It was found that when it was 30%, it was about 350 ± 25 mm, and when the IPF was 40%, it was about 460 ± 25 mm. The ice produced in the present embodiment is in the form of a slurry. As shown in FIG. 2, the ice / water slurry S supplied to the upper surface of the ice layer P in the tank flows and accumulates in the lower part of the ice layer P. To go. Therefore, regardless of the remaining ice in the tank, the rising height at full storage, for example, the rising height when the IPF is 40%, is almost the same value every time. Therefore, by measuring the rising height of the ice layer P, that is, the height from the water surface L to the most raised portion, using the ultrasonic height meter 31, the IPF of the ice layer P in the ice heat storage tank 1 is obtained. It can also be measured.

  In place of the ultrasonic height meter 31, a laser range finder and a measuring device that measures the distance by capacitance can also be used.

  The ice bank system employed in the present embodiment is controlled by the control device C. For example, signals from a flow meter 26 that measures the flow rate of chilled cold water and signals from temperature sensors 27 and 28 that measure the temperature of chilled cold water are control devices. The integrated value of the amount of supplied cold energy output to C and supplied to the cooling load 24 is calculated. On the other hand, a height signal from the ultrasonic height meter 31 is also output to the control device C, and IPFfull (determined to be stored in the ice heat storage tank 1 at the design stage) according to the previously set height-full storage relationship. Ice storage rate). Based on these signals, the control device C controls the refrigerator 12, the pumps 4, 14 and the like to control the start and stop of the ice storage operation.

  In addition, the system configuration example shown in FIG. 1 shows the main part. When the construction is actually performed on the site, for example, the piping between the cooling load 24 and the ice heat storage tank 1 is not directly performed, As a radiator, a water-water heat exchanger is interposed, or for an ice making system, a water-water heat exchanger is interposed in the first intake pipe 3 to exchange heat with the circulation system to the cooling load. Then, the water after the temperature rise may be sent to the supercooler 11.

Next, the setting of the height position of the supply port 5a of the supply pipe 5 in the ice bank system according to the above configuration will be described. As described above, when supplying ice / water slurry into the ice heat storage tank 1, as shown in FIG. 3, (a) the ice / water slurry S is supplied from below to the vicinity of the water surface L of the ice heat storage tank. As shown in FIG. 4, there can be considered a method of storing ice and a method (b) of supplying ice / water slurry S from the upper part of the ice heat storage tank to store ice.
As described above, the method (a) tends to spread in the horizontal direction, and as a result, the ice layer does not rise more than the method (b), and therefore, the ice storage state tends to be uniform in the horizontal direction.

More specifically, in the method (a), the pressure E (penetration potential) of water penetrating into the ice layer is substantially the same as the position of the upper surface of the ice layer as shown in FIG. On the other hand, in the method (b), as shown in FIG. 4, the permeation potential E in FIG. 3 includes the potential corresponding to the flow velocity u of the ice / water slurry S, the ice / water slurry supply port Q, A potential corresponding to the distance K on the top surface of the ice layer is added. For example, when the flow velocity u of the ice / water slurry S is 2 m / s and the distance K is 0.3 m, the potential of the method (b) is (1/2 × 2 ² ) / 9.8 + 0.3 = 0.5 mAq larger.

  If the position of the upper surface of the ice layer is 0.5 m, the osmotic potential of the method (a) is 0.5 mAq, and the osmotic potential of the method (b) is 0.5 mAq + 0.5 m = 1.0 mAq. Since water penetrates into the ice layer at twice the potential, it becomes difficult for the ice to spread, and as a result, the method (b) results in a non-uniform ice storage state.

  In view of this point, the present embodiment adopts a configuration in which the supply port 5a of the supply pipe 5 supplies the ice / water slurry S from below to above. At that time, as described above, the ice layer accumulated in the ice heat storage tank 1 (the rising ice layer) increases the blowing resistance of the ice / water slurry S from the supply port 5a installed near the water surface, Since the stable production of supercooled water may be hindered, the supply port 5a is installed above the water surface L.

For the height position of the supply port 5a, first, a rising height H _ice is determined in advance from a predetermined design IPFfull. Here, IPFfull refers to the ice storage rate of ice determined to be stored in the ice heat storage tank 1 at the design stage. Next, as shown in FIG. 2, the water column height H corresponding to the dynamic pressure is obtained from the flow velocity of the ice / water slurry S at the supply port 5a. Then, a value h obtained by subtracting the water column height H corresponding to the dynamic pressure from the rising height H _ice at the time of IPFfull is set as the height position of the supply port 5a. As a result, in the fully charged state near the design IPF, a flow path X is formed in the ice layer above the supply port 5a by the dynamic pressure of the ice / water slurry S, as shown in FIG. The blowing resistance does not increase and the penetration potential can be reduced as much as possible.

  In this embodiment, since the osmotic potential is reduced as much as possible, the ice layer tends to spread in the horizontal direction, and as a result, the ice layer does not rise and a uniform ice storage state in the horizontal direction is realized. Can do.

  By the way, as shown in FIG. 5, the ice / water slurry S having a high fluidity supplied to the upper surface of the ice layer P in the tank is transferred to the ice layer P that can be regarded as a porous body. Flows through the upper surface of the ice layer P while infiltrating, and when the proportion of ice in the ice / water slurry S increases and its fluidity is lost, it accumulates to form an ice layer. Actually, some ice accumulates even when water in the ice / water slurry S flowing on the upper surface of the ice layer P penetrates into the ice layer P, but when the ice / water slurry S loses its fluidity. It has been confirmed by experimental observation that most of the ice is deposited.

FIG. 5 schematically shows a state in which the ice / water slurry S having the ice ratio IPF _S0 and the flow rate G _S0 is supplied to the upper surface of the ice layer. While S flows on the upper surface of the ice layer P, the water of the flow rate _{GW1 in} the ice / water slurry S penetrates into the ice layer P. The flow rate _{G S1} ice-water slurry S at the downstream _is a G S0 _{-G W1,} the ratio _{IPF S1} ice ice-water slurry S _{is, G S0 × IPF S0 / G} S1 = G S0 × IPF _S0 / (G _S0 -G _W1 ).

Ice-water slurry S of this _{IPF S1} while flowing the upper surface of the ice layer P at a flow rate _{G S1,} water flow rate _{G W2} ice-water slurry S from penetrating the ice layer. The flow rate _{G S2} ice-water slurry S at the _{downstream, G S1 -G W2 = G S0} - a _(G W1 ₊ G _W2), similarly, the ratio _{IPF S2} ice ice-water slurry S is _{, G S1 × IPF S1 / G} S2 = (G S0 -G W1) × {G S0 × IPF S0 / (G S0 -G W1)} / - a _{{G S0 (G W1 + G} W2)}.
Further, the flow rate _{G S3} ice-water slurry at the _{downstream, G S2 -G W3 = G S0} - a _{(G W1 + G W2 + G} W3), the proportion _{IPF S3} ice ice-water slurry S is G _{S2 × IPF S2 / G S3 =} {G S0 - (G W1 + G W2)} × [(G S0 -G W1) × {G S0 × IPF S0 / (G S0 -G W1)} / {G S0 - ( _GW1 + _GW2 )}] / { _GS0- ( _GW1 + _GW2 + _GW3 )}.

In this way, the ice ratio IPF _i in the ice / water slurry at a certain point _i is
IPF _i = (G _S0 −ΣG _{Wi (1 to i−1)} ) × (G _S0 −ΣG _{Wi (1 to i−2)} ) × (G _S0 × IPF _S0 / (G _S0 −ΣG _{Wi (1 to i) -2)))} and _{/ (G S0 -ΣG Wi (1~i} -1)) / (G S0 -ΣG Wi (1~i)), the limit value for the IPF _i maintains liquidity If it exceeds, the ice / water slurry S becomes stationary and becomes an ice layer.

Therefore, if the flow rate G _S0 of the ice / water slurry S to be supplied and the ratio IPF _S0 of the ice in the ice / water slurry S to be supplied are known, the ice / water slurry can flow and spread over a wide area to uniformly store ice. It is understood that whether or not it is determined by the flow rate G _{Wi of the} permeated water. Note that the flow rate of ice / water slurry and the IPF can be determined, for example, at the time of trial operation after facility construction.

  In other words, if water in the ice / water slurry having a flow rate equal to or higher than the osmotic water of the ice / water slurry supplied from the supply port 5a is secured in the ice / water slurry, the water excluding the osmotic water in the ice / water slurry and the ice will be supplied. As a result, the ice layer spreads in the horizontal direction and a more uniform ice storage state can be realized in the horizontal direction. For example, in the ice / water slurry supplied from the supply port 5a, when ice is present at a ratio of 3 and water of 97, if the permeated water is 97, the ice / water slurry does not flow and the supply point The ice stops and the ice accumulates on the spot. On the other hand, when water is increased by 60 to the ice / water slurry to form an ice / water slurry with 3 ice and 157 water, the permeated moisture is reduced without reducing the absolute amount of ice in the ice / water slurry. The ice / water slurry spreads far away by the water 60 except for.

  From this point of view, it can be proposed to mix the low-temperature water into the supply pipe 5 and increase the flow rate of the ice / water slurry supplied from the supply port 5a. In such a case, it is preferable that the water to be mixed is at a low temperature and does not reduce the amount of ice in the ice / water slurry as much as possible. Therefore, the water in the ice heat storage tank 1 is preferably taken and supplied to the supply pipe 5. Based on this, for example, the examples shown in FIGS. 6 and 7 can be proposed.

  In the example shown in FIG. 6, the water in the ice heat storage tank 1 is taken in by the pump 52 installed in the ice heat storage tank 1 through the water intake pipe 51 piped in the ice heat storage tank 1, and is supplied as it is. It is the structure supplied inside. In the example of FIG. 6, water is taken from near the bottom of the tank. Further, in the example shown in FIG. 7, the water in the ice heat storage tank 1 is supplied by the pump 53 installed outside the ice heat storage tank 1 by the intake pipe 54 piped outside the ice heat storage tank 1. Water is taken from the vicinity and supplied into the supply pipe 5 outside the ice heat storage tank 1.

  7, the flow rate of the ice / water slurry produced is Gs, the proportion of ice in the ice / water slurry is IPFs, and the flow rate of water taken from the ice heat storage tank 1 is Gw. The flow rate of the ice / water slurry at the mouth 5a increases to Gs + Gw and the superficial velocity increases, and the ice ratio IPFs at that time decreases to IPFs × Gs / (Gs + Gw). It has been confirmed that when the IPFs ratio of ice in the ice / water slurry increases, a heterogeneous ice layer is formed and water easily penetrates into the ice layer, and the ice does not spread. Even if the taken-in water is added to reduce the proportion IPFs of ice in the ice / water slurry, such a decrease in IPFs does not adversely affect the ice storage shape.

  In the example of FIG. 6, since the water in the ice heat storage tank 1 is supplied as it is into the supply pipe 5 in the tank, the temperature of the water to be mixed does not change, and therefore the ice in the ice / water slurry is not changed. There is an advantage of not reducing the amount of. On the other hand, in the example shown in FIG. 7, the pump 53 and the intake pipe 54 are both disposed outside the tank, which is advantageous in terms of maintenance and maintenance.

  Furthermore, the pumps 52 and 53 used in the water recirculation system as shown in FIGS. 6 and 7 may be low-pump and low-power-consumption pumps. It is sufficient to start when the osmotic potential increases. As such an example, for example, the rising height of ice in the ice heat storage tank 1 is monitored by the ultrasonic height gauge 31, and the pumps 52 and 53 are started when the height exceeds a predetermined height, or It can be proposed to monitor the temporal change in the rising height of the ice in the ice heat storage tank 1 and to start the pumps 52 and 53 when the change exceeds or exceeds a predetermined rate of change. Such on / off control of the pumps 52 and 53 can be easily performed by the control device C that has received the detection signal from the ultrasonic height meter 31.

  INDUSTRIAL APPLICABILITY The present invention is useful for a so-called dynamic type ice puncture system in which ice / water slurry produced by a supercooler is supplied to an ice heat storage tank to store ice.

It is explanatory drawing which shows the structure of the ice bank system for enforcing the supply method concerning embodiment. It is explanatory drawing of the supply port vicinity in the ice bank system of FIG. It is explanatory drawing which showed typically the mode of the ice layer and permeated water when supplying ice and water slurry toward the upper direction from the downward direction. It is explanatory drawing which showed typically the mode of the ice layer and permeated water when supplying ice and water slurry toward the downward direction from the upper part. It is explanatory drawing which showed typically the flow of the ice and water slurry supplied to an ice layer, and the relationship of permeated water. It is explanatory drawing which showed typically the example which supplies the water in an ice thermal storage tank to a supply pipe with the pump arrange | positioned in a tank, and a water intake pipe. It is explanatory drawing which showed typically the example which supplies the water in an ice thermal storage tank to a supply pipe with the pump arrange | positioned out of the tank, and a water intake pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ice thermal storage tank 2 Water intake part 3 1st water intake pipe 4, 14, 22a-22c, 52, 53 Pump 5 Supply pipe 5a Supply port 11 Supercooler 12 Refrigerator 13 Supercooler canceller 21 2nd water intake pipe 23 Water supply pipe 24 Cooling load 25 Return water pipe 25a Outlet 26 Flowmeter 27, 28 Temperature sensor 29 Bypass pipe 30 Flow control valve 31 Ultrasonic height gauge C Controller E Permeation potential h Height above supply surface H Water column height H
Hice Ice swell height L Water surface P Ice layer Q Ice / water slurry supply port X Channel

Claims (4)

When supplying ice / water slurry produced by the supercooler from the supply port of the supply pipe to the ice heat storage tank by discharging the ice / water slurry from below to above ,
The supply port is located on the water surface in the ice storage tank,
Obtaining the ice swell height Hice in the ice heat storage tank at a predetermined ice storage rate in the ice heat storage tank,
From the flow velocity of the ice / water slurry at the supply port, the water column height H corresponding to the dynamic pressure is obtained,
The height obtained by subtracting the water column height H from the Hice is set to a height position on the water surface of the supply port,
A method for setting the height position of the supply port in the ice / water slurry supply method. Using the method for setting the height position of the supply port in the ice / water slurry supply method according to claim 1, the height of the supply port of the ice / water slurry supply pipe is set,
When supplying ice / water slurry produced by the supercooler to the ice heat storage tank by discharging it from below through the supply port of the supply pipe located on the water surface in the ice heat storage tank, the supply A method for supplying ice / water slurry, wherein water taken from the ice heat storage tank is added to the ice / water slurry in the tube to increase the flow rate of the ice / water slurry discharged from the supply port. . Monitor the rising height of the ice in the ice storage tank, and when it exceeds the specified height, add water taken from the ice storage tank to increase the flow rate of ice / water slurry discharged from the supply port The method for supplying ice / water slurry according to claim 2, wherein: Monitor the time change of the rising height of the ice in the ice heat storage tank, and when the change exceeds the predetermined rate of change, add water taken from the ice heat storage tank and discharge it from the supply port. 3. The ice / water slurry supply method according to claim 2, wherein the flow rate of the ice / water slurry is increased.

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