JP4922028B2 - Ice heat storage equipment - Google Patents

Description

  The present invention relates to an ice heat storage facility that stores ice together with water in a heat storage tank, stores cold heat in the form of sensible heat and latent heat, and uses the heat storage cold energy for air conditioning applications and the like.

  Conventionally, in an ice heat storage facility, ice and water slurry (ice water slurry) generated by the supercooling release method is discharged and supplied from above the stored water in the heat storage tank onto the stored water to store ice in the heat storage tank. An ice supply port and an ice supply port that discharges ice water slurry to the stored water near the surface of the stored water are provided, and after accumulating ice in the form of an ice accumulation layer floating in the stored water, the ice accumulation layer is melted. In order to perform ice melting to extract the latent heat of the ice (cold latent heat), the return water from the cooling / consuming devices such as air conditioners and fan coil units that supply the extracted cold water from the lower part of the heat storage tank is supplied to the ice accumulation layer. In addition, a sprinkling nozzle that sprinkles water from above and a submersible nozzle that discharges return water into the stored water near the bottom surface of the ice accumulation layer are provided. To return the water Distilled water was such as provided instead Mizuguchi for discharging water surface near the reservoir water (see Patent Document 1).

JP-A-6-300347

  However, in the conventional ice heat storage equipment, the structure of the heat storage tank becomes complicated because the ice supply port, the watering nozzle, the submersible nozzle, the return water port and the like as described above are provided in the heat storage tank. There was a problem that the function of the tank was low.

  In view of this situation, the main problem of the present invention is to effectively improve the function of the heat storage tank by adopting a rational equipment configuration.

To configure the ice heat storage equipment, as Reference Configuration 1,
An ice storage operation in which granular ice is supplied to the heat storage tank to form an ice accumulation layer floating in the stored water in the heat storage tank, and the cold water supplied to the cold energy consumption device is taken out from the lower part of the heat storage tank after this ice storage operation However, in the ice heat storage facility for performing the ice melting operation to melt the ice accumulation layer with the return water from the cold energy consumption device,
A discharge port is disposed in an upper space of the stored water, and in the ice storage operation, the granular ice is discharged from the discharge port to form the ice accumulation layer at a position lower than the discharge port. Then, operation control means for discharging the return water from the discharge port and melting the ice accumulation layer may be provided.

  In other words, according to the reference configuration 1, in order to form an ice accumulation layer floating in the stored water in the ice storage operation, by discharging granular ice from the discharge port arranged in the space above the stored water, the discharge port Since the ice accumulation layer is formed at a lower position, for example, compared to a method in which granular ice is discharged into the water near the surface of the stored water to form the ice accumulation layer, the stored water and the growing ice accumulation layer itself are Granular ice can be smoothly discharged from the discharge port without hindering ice discharge, which makes it easy to efficiently form a good ice accumulation layer on the ice storage surface and the de-icing surface of the next process. Become.

  Further, in order to melt the ice accumulation layer in the ice-breaking operation after the ice storage operation, the return water is discharged from the discharge port instead of the granular ice, and the return water is discharged from the ice accumulation layer ( That is, it is possible to melt the ice accumulation layer by spraying water on the ice accumulation layer formed at a position lower than the discharge port, and thereby, for example, the return water is discharged into the water of the stored water. Compared to the method that melts the ice, the ice accumulation layer is melted well, for example, the melting of the ice accumulation layer is progressed evenly in plan view to remove cold water from the lower part of the heat storage tank, and the latent heat of ice is taken out smoothly. It becomes easy.

  And while ensuring the function of the heat storage tank high in each of the ice storage operation and the subsequent ice melting operation in this way, the discharge port is used for discharging granular ice in the ice storage operation and discharging return water in the ice melting operation. Since the structure is shared, the shared structure can also simplify the structure of the heat storage tank, thereby reducing the equipment cost and facilitating operational and maintenance management.

In addition, as a reference configuration 2,
Following ice melting operation, the ice accumulation layer floating in the stored water of the heat storage tank is melted by the return water from the cold energy consumption apparatus while taking out the cold water supplied to the cold energy consumption apparatus from the lower part of the heat storage tank. In the ice heat storage facility for carrying out the water heat radiation operation for returning the return water from the cold energy consumption device to the upper portion of the heat accumulation tank while taking out the cold water supplied to the cold energy consumption device from the lower portion of the heat accumulation tank,
A discharge port that can be moved up and down is disposed at the top of the heat storage tank, and in the ice melting operation, the discharge port is positioned higher than the ice accumulation layer in the space above the stored water, and the return water is discharged from the discharge port. The ice accumulation layer is melted by discharging the water, and in the water heat radiation operation, the discharge port is positioned in the vicinity of the water surface of the stored water, and the return water is discharged from the discharge port. Operation control means for returning water to the upper part of the heat storage tank may be provided.

  That is, according to the reference configuration 2, in order to melt the ice accumulation layer in the ice-breaking operation, the discharge port that can move up and down is positioned higher than the ice accumulation layer in the upper space of the stored water, Since the return water from the chiller is discharged, the return water can be sprinkled over the ice accumulation layer (that is, the ice accumulation layer formed at a position lower than the discharge port) to melt the ice accumulation layer. Thus, for example, compared to a method in which the return water is discharged into the stored water and the ice accumulation layer is melted, the melting of the ice accumulation layer is generally uneven in a plan view when the cold water is taken out from the lower part of the heat storage tank. It is easy to melt the ice accumulation layer satisfactorily, for example, by smoothly removing the retained latent heat of ice (cold latent heat).

  In order to return the return water from the cold energy consuming device to the upper part of the heat storage tank in the water heat radiation operation following the ice-melting operation, the discharge port that can be moved up and down is lowered from the upper space of the stored water, and the In this state, the return water is discharged from the discharge port. For example, compared with the case where the return water is discharged to the upper space of the stored water and returned to the upper part of the heat storage tank without the ice accumulation layer. It becomes easy to return the returned water to the heat storage tank well, for example, by keeping the stored water in a temperature stratified state by suppressing disturbance of the stored water due to the return water with respect to the cold water extraction from the lower part.

  And while ensuring the function of the heat storage tank high in each of the ice-melting operation and the water-dissipating operation that follows in this manner, the discharge outlet is discharged in the space above the stored water in the ice-breaking operation and stored in the water-dissipating operation. Since it is also used for return water discharge in water, it can also simplify the tank structure of the heat storage tank, thereby reducing the equipment cost and operating and maintenance management. Can also be made easier.

  In addition, in implementation of this invention, if said reference structure 1 and reference structure 2 are implemented simultaneously, the function improvement of a thermal storage tank and simplification of a thermal storage tank structure can be achieved more effectively.

In addition, to configure the ice heat storage equipment, as Reference Configuration 3,
An ice storage operation in which granular ice is supplied to the heat storage tank to form an ice accumulation layer floating in the stored water in the heat storage tank, and the cold water supplied to the cold energy consumption device is taken out from the lower part of the heat storage tank after this ice storage operation An ice heat storage facility that performs an ice-breaking operation in which the ice accumulation layer is melted by return water from the cold energy consumption device,
Disposing a discharge port capable of moving up and down at the top of the heat storage tank,
In the ice storage operation, the discharge port is positioned in a space above the stored water in the heat storage tank, and the granular ice is discharged from the discharge port, whereby the ice accumulation layer is placed at a position lower than the discharge port. With forming
Increasing the discharge port along with the growth of the ice accumulation layer in a state in which the distance between the upper surface of the ice accumulation layer and the discharge port is maintained at a predetermined size,
In the ice melting operation, the discharge port is positioned higher than the ice accumulation layer in the space above the stored water in the heat storage tank, and the return water is discharged from the discharge port, thereby melting the ice accumulation layer. You may provide the operation control means to make .

That is, according to the reference configuration 3 , in the same manner as the reference configuration 1 described above, in order to form an ice accumulation layer floating in the stored water in the ice storage operation, the granular ice is discharged from the discharge port disposed in the upper space of the stored water. By discharging, an ice accumulation layer is formed at a position lower than the discharge port. For example, compared to a method in which granular ice is discharged into water near the surface of the stored water to form an ice accumulation layer, In addition, the granular ice can be smoothly discharged from the discharge port while the growing ice accumulation layer itself does not become an obstacle to ice discharge, so that a good ice accumulation layer can be formed on the ice storage surface and the de-icing surface of the next process. It becomes easy to form efficiently.
Further, in order to melt the ice accumulation layer in the ice-breaking operation after the ice storage operation, the return water is discharged from the discharge port instead of the granular ice, and the return water is discharged from the ice accumulation layer ( That is, it is possible to melt the ice accumulation layer by spraying water on the ice accumulation layer formed at a position lower than the discharge port, and thereby, for example, the return water is discharged into the water of the stored water. Compared to the method that melts the ice, the ice accumulation layer is melted well, for example, the melting of the ice accumulation layer is progressed evenly in plan view to remove cold water from the lower part of the heat storage tank, and the latent heat of ice is taken out smoothly. It becomes easy.
Furthermore, while ensuring a high function of the heat storage tank in each of the ice storage operation and the subsequent ice melting operation in this way, the discharge port is configured to discharge granular ice in ice storage operation and discharge of return water in ice melting operation. Therefore, it is also possible to simplify the tank structure of the heat storage tank, thereby reducing the equipment cost and facilitating operational and maintenance management. .
And in addition to these, according to this reference structure 3 , the granular ice is discharged from the discharge port disposed in the upper space of the stored water, and an ice accumulation layer is formed below the discharge port. As the ice accumulation layer grows, the discharge port is raised so that the distance between the upper surface of the ice accumulation layer and the discharge port is maintained at a predetermined size. For example, the ice collection layer is fixed and the ice collection layer grows as the ice accumulation layer grows. Compared to the fact that the separation distance between the upper surface of the stack and the discharge port is gradually shortened (that is, the height of the discharge port from the upper surface of the ice accumulation layer is gradually decreased), the supply state of the discharged granular ice to the upper surface of the ice accumulation layer is It is possible to form an ice accumulation layer while maintaining a certain good state, thereby more effectively achieving a good ice accumulation layer efficiently on the ice storage surface and the de-icing surface of the next process. be able to.

That is, according to this reference configuration 3, the improvements of the thermal storage tank while allowing also simplification of the heat storage tank structure can achieve one layer effectively.

In addition, to configure the ice heat storage equipment, as Reference Configuration 4,
An ice storage operation in which granular ice is supplied to the heat storage tank to form an ice accumulation layer floating in the stored water in the heat storage tank, and the cold water supplied to the cold energy consumption device is taken out from the lower part of the heat storage tank after this ice storage operation An ice heat storage facility that performs an ice-breaking operation in which the ice accumulation layer is melted by return water from the cold energy consumption device,
Disposing a discharge port capable of moving up and down at the top of the heat storage tank,
In the ice storage operation, the discharge port is positioned in a space above the stored water in the heat storage tank, and the granular ice is discharged from the discharge port, whereby the ice accumulation layer is placed at a position lower than the discharge port. Forming,
In the ice melting operation, the discharge port is positioned higher than the ice accumulation layer in the space above the stored water in the heat storage tank, and the return water is discharged from the discharge port, thereby melting the ice accumulation layer. As well as
Operation control means may be provided for lowering the discharge port as the ice accumulation layer melts in a state in which the distance between the upper surface of the ice accumulation layer and the discharge port is maintained at a predetermined size .

That is, according to the reference configuration 4 , like the reference configuration 1 described above, in order to form an ice accumulation layer floating in the stored water in the ice storage operation, the granular ice is discharged from the discharge port disposed in the upper space of the stored water. By discharging, an ice accumulation layer is formed at a position lower than the discharge port. For example, compared to a method in which granular ice is discharged into water near the surface of the stored water to form an ice accumulation layer, In addition, the granular ice can be smoothly discharged from the discharge port while the growing ice accumulation layer itself does not become an obstacle to ice discharge, so that a good ice accumulation layer can be formed on the ice storage surface and the de-icing surface of the next process. It becomes easy to form efficiently.
Further, in order to melt the ice accumulation layer in the ice-breaking operation after the ice storage operation, the return water is discharged from the discharge port instead of the granular ice, and the return water is discharged from the ice accumulation layer ( That is, it is possible to melt the ice accumulation layer by spraying water on the ice accumulation layer formed at a position lower than the discharge port, and thereby, for example, the return water is discharged into the water of the stored water. Compared to the method that melts the ice, the ice accumulation layer is melted well, for example, the melting of the ice accumulation layer is progressed evenly in plan view to remove cold water from the lower part of the heat storage tank, and the latent heat of ice is taken out smoothly. It becomes easy.
Furthermore, while ensuring a high function of the heat storage tank in each of the ice storage operation and the subsequent ice melting operation in this way, the discharge port is configured to discharge granular ice in ice storage operation and discharge of return water in ice melting operation. Therefore, it is also possible to simplify the tank structure of the heat storage tank, thereby reducing the equipment cost and facilitating operational and maintenance management. .
And in addition to these, according to this reference structure 4 , the return water from the cold energy consuming apparatus is discharged from the discharge port arranged in the upper space of the stored water, and the ice accumulation layer floating in the stored water (that is, In order to melt the ice accumulation layer formed at a position lower than the discharge port, the discharge port is lowered along with the melting of the ice accumulation layer so as to keep the distance between the upper surface of the ice accumulation layer and the discharge port. Thus, for example, the discharge port is fixed and the distance between the upper surface of the ice accumulation layer and the discharge port is gradually increased with the melting of the ice accumulation layer (that is, the height of the discharge port with respect to the upper surface of the ice accumulation layer is gradually increased). ), The melting of the ice accumulation layer can be progressed evenly in a plan view, and the latent heat (cold latent heat) of ice can be taken out more effectively.

That is, this is also the reference structure 4, the improvements of the thermal storage tank while allowing also simplification of the heat storage tank structure can achieve one layer effectively.

here,
[1] A first characteristic configuration of the present invention relates to an ice heat storage facility.
An ice storage operation in which granular ice is supplied to the heat storage tank to form an ice accumulation layer floating in the stored water in the heat storage tank, and the cold water supplied to the cold energy consumption device is taken out from the lower part of the heat storage tank after this ice storage operation An ice heat storage facility that performs an ice-breaking operation in which the ice accumulation layer is melted by return water from the cold energy consumption device,
A drive device is provided to move the discharge port arranged above the heat storage tank up and down,
In the ice storage operation, the discharge device is positioned in the upper space of the stored water in the heat storage tank by the drive device, and the granular ice is discharged from the discharge port, so that the lower position than the discharge port. While forming an ice accumulation layer,
With the growth of the ice accumulation layer, the ejection port is raised by the driving device in a state in which the separation dimension between the upper surface of the ice accumulation layer and the ejection port is maintained at a predetermined dimension.
In the ice-melting operation, the discharge port is positioned higher than the ice accumulation layer in the space above the stored water in the heat storage tank by the driving device, and the return water is discharged from the discharge port, whereby the ice Provide operation control means to melt the accumulation layer,
This operation control means
Following the ice-melting operation, while taking out the cold water supplied to the cold energy consumption device from the lower part of the heat storage tank, the water heat radiation operation to return the return water from the cold energy consumption apparatus to the upper part of the heat storage tank,
In this water heat radiation operation, the drive device positions the discharge port in the vicinity of the water surface of the stored water in the heat storage tank, and discharges the return water from the discharge port, whereby the return water is discharged from the heat storage tank. It is in the point which has the structure which returns to the upper part of.
According to the first characteristic configuration, in addition to the operational effect of the reference configuration 3 described above, in the water heat radiation operation following the ice melting operation, the discharge port is lowered from the upper space of the stored water by the drive device, and the stored water in the heat storage tank is stored. Since the return water is discharged from this discharge port in the state where it is located in the vicinity of the water surface of the water, for example, the return water is discharged into the upper space of the stored water in the absence of an ice accumulation layer as in the above-described Reference Configuration 2. Compared to returning to the upper part of the heat storage tank, the return water is returned to the heat storage tank in a favorable manner, such as keeping the stored water in a temperature stratified state by suppressing the turbulence of the stored water due to the return water for the cold water extraction from the lower part of the heat storage tank. Becomes easier.
In addition, the discharge port is used for both the return water discharge in the space above the stored water in the ice-breaking operation and the return water discharge in the stored water in the water heat radiation operation (that is, as a whole, above the stored water in the ice storage operation). Since it is a combination of the discharge of granular ice in the space, the discharge of return water in the space above the stored water in the ice-breaking operation, and the discharge of return water in the stored water in the water heat radiation operation) The shared use can also simplify the tank structure of the heat storage tank, thereby reducing the equipment cost and facilitating operation and maintenance management.
[2] The second feature configuration of the present invention is the implementation of the first feature configuration,
The operation control means includes
In the ice-breaking operation, the discharge port is lowered by the driving device as the ice accumulation layer melts in a state in which the separation dimension between the upper surface of the ice accumulation layer and the discharge port is maintained at a predetermined size. is there.
According to the second feature configuration, in addition to the operational effect of the first feature configuration, the discharge port is lowered with the melting of the ice accumulation layer so as to maintain the separation dimension between the upper surface of the ice accumulation layer and the discharge port. As in the above-described Reference Configuration 4, for example, the discharge port is fixed and the distance between the upper surface of the ice accumulation layer and the discharge port is gradually increased with the melting of the ice accumulation layer (that is, the discharge port is located on the upper surface of the ice accumulation layer). The ice accumulation layer can be melted evenly in a plan view and the latent heat of ice (cold latent heat) can be taken out more effectively. be able to.
In the implementation of either the first or the second characteristic configuration , it is desirable that the discharge port has a structure in which the granular ice and the return water from the cold energy consuming device are evenly dispersed in a plan view and discharged horizontally.

  FIG. 1 shows an ice heat storage facility for air conditioning, 1 is a heat storage tank for storing ice together with water C, and in the lower part of the heat storage tank 1 is taken out of the stored water C in the tank and inside the tank of return water C The lower intake / exit 2 used for return to the tank is provided, and in the upper part of the heat storage tank 1 and just above the lower input / output 2, the tank stored water C is similarly taken out and the return water C is returned to the tank. And an upper entrance / exit 3 used for supplying ice into the tank is provided.

  As shown in FIG. 2, the lower input / output device 2 and the upper input / output device 3 have substantially the same structure, and the upper input / output device 3 is located above the gap between the upper and lower disk-shaped members 2 a and 3 a arranged in parallel. Alternatively, the lower inlet / outlet pipes 4 and 5 are opened at the center of one of the disk-like members 2a and 3a, and the porous plates 2b and 3b extending between the outer peripheral edges of the two disk-like members 2a and 3a The members 2a and 3a are stretched over the entire circumference, and the stretched portions of the perforated plates 2b and 3b (strictly, a large number of holes in the perforated plates 2b and 3b) serve as the entrances 2c and 3c into the tank. It is.

  That is, when returning the return water C into the tank, the return water C returning through the inlet / outlet pipes 4 and 5 is dispersed horizontally from the inlet / outlet 2c, 3c in the lower inlet / outlet 2 or the upper inlet / outlet 3 in a horizontal direction. On the other hand, with respect to taking out the stored water C in the tank, the stored water C in the tank is sucked evenly in the plan view from the entrances 2c and 3c in the lower entrance / exit 2 or the upper entrance 3 To guide you.

  The lower inlet / outlet 2 and the lower inlet / outlet pipe 4 connected thereto are fixed in the tank. On the other hand, the vertical pipe portion 5a of the upper inlet / outlet pipe 5 connected to the upper inlet / outlet 3 has its longitudinal direction (that is, up and down). The pipe can be expanded and contracted in the direction), and the upper pipe 3 can be vertically moved by the expansion and contraction of the vertical pipe portion 5a.

  Then, the lower end of a bar-like interlocking member 6 that hangs down from above the heat storage tank 1 is connected to the upper input / output device 3, and the bar-like interlocking member 6 is moved up and down via the rack and pinion mechanism or the like above the heat storage tank 1. A drive device 7 is provided, and the drive device 7 moves the bar-like interlocking member 6 up and down to move the upper entrance / exit 3 up and down in the upper part of the tank over the state indicated by the solid line and the state indicated by the alternate long and short dash line in the figure. It is supposed to be moved.

  A brine circulation path 8 circulates the brine B by the brine pump 11 between the heat absorption part of the refrigerator 9 and the heat source heat exchanger 10, and 12 a cooling water CW between the heat radiation part of the refrigerator 9 and the cooling tower 13. A cooling water circulation path for circulating the water by the cooling water pump, and 15 a heat source side cold water circulation path for circulating the stored water C of the heat storage tank 1 by the heat source side cold water pump 16 between the heat storage tank 1 and the heat source heat exchanger. The lower inlet / outlet pipe 4 connected to the lower inlet / outlet 2 is connected to the water inlet 10a of the heat source heat exchanger 10 through the forward path 15a of the heat source side cold water circulation path 15, and the upper inlet / outlet pipe 5 connected to the upper inlet / outlet 3 is connected to the heat source side. It is connected to the water outlet 10 b of the heat source heat exchanger 10 through the return path 15 b of the cold water circulation path 15.

  Further, in this heat source side cold water circulation path 15, the lower inlet / outlet pipe 4 connected to the lower inlet / outlet 2 is communicated with the water outlet 10 b instead of the water inlet 10 a of the heat source heat exchanger 10, and With the connected upper inlet / outlet pipe 5 communicating with the water inlet 10a instead of the water outlet 10b of the heat source heat exchanger 10, the stored water C of the heat storage tank 1 is placed between the heat storage tank 1 and the heat source heat exchanger 10. Similarly, two switching bypass passages 15c and 15d for circulation by the heat source side cold water pump 16 and switching on-off valves V1 to V5 are provided.

  That is, in the heat source side cold water circulation path 15, forward circulation (see FIG. 4) for circulating the stored water C in the order of the lower inlet / outlet 2, the forward path 15 a, the heat source heat exchanger 10, the return path 15 b, and the upper inlet / outlet 3. Selective implementation of reverse circulation (see FIG. 3) in which the stored water C is circulated in the order of upper inlet / outlet unit 3—switching bypass channel 15c—heat source heat exchanger 10—switching bypass channel 15d—lower input / output unit 2 This is made possible by opening and closing the on-off valves V1 to V5.

  On the other hand, in the forward path 15a of the heat source side cold water circulation path 15, a load device 19 (cold energy consuming apparatus) such as an air conditioner or a fan coil unit is located closer to the heat storage tank 1 than the connection part of the two bypass paths 15c and 15d. The forward side 20a of the load side cold water circulation path 20 is connected to the return path 15b of the heat source side cold water circulation path 15 at a location closer to the heat storage tank 1 than the connection part of the two bypass paths 15a, 15b. The return path 20b of the path 20 is connected, and in the forward path 20a and the return path 20b of the load side chilled water circulation path 20, switching on-off valves V6 and V7 for opening and closing them are provided in the vicinity of the connection portion to the heat source side chilled water circulation path 15. In addition, the stored water C of the heat storage tank 1 is circulated between the load device 19 and the heat storage tank 1 through the load side cold water circulation path 20 in the forward path 20a of the load side cold water circulation path 20. It is equipped with a load-side cold water pump 21.

  Reference numerals 22a to 22c denote first to third temperature sensors for detecting temperatures ta, tb, and tc of the stored water C in the lower, upper and lower middle parts, and upper part of the heat storage tank 1, respectively, and 23 denotes a water outlet 10b of the heat source heat exchanger 10. 4 is a fourth temperature sensor for detecting the water temperature to, 24 is an ice sensor for detecting the upper surface position h of the ice accumulation layer A floating in the stored water C in the heat storage tank 1, and 25 is a downward extension of the bar-like interlocking member 6. A stroke sensor 26 for detecting the length L is an operation controller for performing an opening / closing operation of the switching on / off valves V1 to V7 and an on / off operation of each device based on the detection information of these sensors. The operation controller 26 executes the following controls (A) to (F).

  3 to 10, among the switching on-off valves V1 to V7, white ones indicate a valve open state, and black ones indicate a valve closed state.

(A) Pre-stage water heat storage operation When the set heat storage start time T1 is reached, the state shown in FIG. 3 is shown in FIG. 3 from the state shown in FIG. As described above, the heat source side cold water circulation path is operated by opening / closing the switching on / off valves V1 to V7 and the operation of the heat source side cold water pump 16 in a state where the upper entrance / exit 3 is located in the vicinity of the surface of the stored water C in the heat storage tank 1. At 15, the reverse circulation is performed, and the refrigerator 9, the brine pump 11, the cooling tower 13, and the cooling water pump 14 are operated.

  Further, in the reverse circulation in the heat source side cold water circulation path 15, the fourth temperature is set so that the water temperature to at the water outlet 10b of the heat source heat exchanger 10 becomes the first set temperature t1 (in this example, t1 = 4 ° C.). The output of the refrigerator 9 is adjusted based on the outlet water temperature to detected by the temperature sensor 23.

  That is, in this upstream water heat storage operation, the hot water storage C (16 ° C.) in the heat storage tank 1 is passed through the inlet / outlet 3c of the upper inlet / outlet 3 with the upper inlet / outlet 3 positioned in the water near the surface of the stored water C. Cold water) is supplied to the heat source heat exchanger 10 and cooled to the first set temperature t1 by heat exchange with the cooling brine B by the refrigerator 9, and the cooled water C (4 ° C. cold water) at the first set temperature t1 is cooled. From the inlet / outlet 2c of the lower inlet / outlet 2, it is dispersed radially in a plan view and discharged horizontally into the lower stored water C in the heat storage tank 1, thereby storing the upper part of the heat storage tank detected by the third temperature sensor 22c. Until the water temperature tc drops to the first set temperature t1 (that is, until the heat storage tank 1 is filled with water C (4 ° C. cold water) cooled to the first set temperature t1 by the heat source heat exchanger 10) First setting with heat source heat exchanger 10 Water C (4 ° C cold water) having a large specific gravity cooled to a degree t1 is present in the lower side of the tank, and water C (16 ° C cold water) having a low specific gravity that has not yet been cooled to the first set temperature t1 In the flow form in the tank that gradually increases the boundary K between the lower reservoir water C (4 ° C. cold water) and the upper reservoir water C (16 ° C. cold water) while maintaining the temperature stratification state that exists on the upper side of the inside, Cold heat (sensible heat) held in water C (4 ° C. cold water) having a first set temperature t 1 cooled by the heat source heat exchanger 10 is stored in the heat storage tank 1.

(B) Rear-stage water heat storage operation The stored water temperature tc at the upper part of the heat storage tank detected by the third temperature sensor 22c in the above-mentioned front-stage water heat storage operation is lowered to the first set temperature t1 (that is, the heat source heat exchanger 10 When the heat storage tank 1 is filled with water C (4 ° C. cold water) cooled to a preset temperature t1), as shown in FIG. 4, the upper entrance / exit 3 is continuously positioned in the vicinity of the water surface of the stored water C. In this state, the forward / reverse circulation is performed in the heat source side cold water circulation path 15 by opening / closing the switching on / off valves V1 to V7 and the operation of the heat source side cold water pump 16, and the refrigerator 9, brine pump 11, cooling The tower 13 and the cooling water circulation pump 14 are continuously operated.

  Further, in the forward rotation circulation in the heat source side cold water circulation path 15, the water temperature to at the water outlet 10b of the heat source heat exchanger 10 is set to the second set temperature t2 (in this example, t2 = 0 ° C.). The output of the refrigerator 9 is adjusted based on the outlet water temperature to detected by the four temperature sensor 23.

  That is, in this latter stage water heat storage operation, the stored water C (4 ° C. cold water) taken out from the lower part of the heat storage tank 1 through the inlet / outlet 2c of the lower inlet / outlet 2 is supplied to the heat source heat exchanger 10 to cool the cooling brine B by the refrigerator 9 Is cooled to the second set temperature t2 by heat exchange with the water, and the cooled water C at the second set temperature t2 (0 ° C. cold water) is supplied from the inlet / outlet 3c of the upper inlet / outlet 3 located in the water near the water surface of the stored water C. In a plan view, it is dispersed radially and discharged horizontally into the upper stored water C in the heat storage tank 1, whereby the lower water storage temperature ta detected by the first temperature sensor 22a is the second set temperature. until the heat storage tank 1 is filled with the water C (0 ° C. cold water) cooled to the second set temperature t2 by the heat source heat exchanger 10 until the heat storage tank 1 is filled. 2 Specific gravity cooled to set temperature t2 Temperature at which small water C (0 ° C. cold water) is present in the upper side of the tank and water C (4 ° C. cold water) having a large specific gravity that has not yet been cooled to the second set temperature t2 is present in the lower side of the tank. Cooling by the heat source heat exchanger 10 while maintaining the stratified state and in the tank flow form in which the boundary K between the upper reservoir water C (0 ° C. cold water) and the lower reservoir water C (4 ° C. cold water) is gradually lowered. The cold energy (sensible heat) held by the water C (0 ° C. cold water) having the second set temperature t2 is stored in the heat storage tank 1.

(C) Ice storage operation The stored water temperature ta in the lower part of the heat storage tank detected by the first temperature sensor 22a in the latter-stage water heat storage operation is lowered to the second set temperature t2 (that is, the second heat source heat exchanger 10 When the heat storage tank 1 is filled with water C (0 ° C. cold water) cooled to the set temperature t2, the upper entrance / exit 3 is raised by the drive device 7 as shown in FIG. It is located in the space above the water C, and in that state, the forward rotation circulation is continued in the heat source side cold water circulation path 15, and the refrigerator 9, the brine pump 11, the cooling tower 13, and the cooling water pump 14 are continuously operated.

  Further, in the forward circulation in the heat source side cold water circulation path 15, the water temperature to at the water outlet 10b of the heat source heat exchanger 10 is set to the third set temperature t3 below the freezing point (in this example, t3 = −2 ° C.). In addition, the output of the refrigerator 9 is adjusted based on the outlet water temperature to detected by the fourth temperature sensor 23.

  That is, in this ice storage operation, the stored water C (0 ° C. cold water) taken out from the lower part of the heat storage tank 1 through the inlet / outlet 2c of the lower inlet / outlet 2 is supplied to the heat source heat exchanger 10 and the cooling brine B by the refrigerator 9 Of the upper inlet / outlet 3 in which the cooled subcooled water C (−2 ° C.) at the third set temperature t3 is positioned in the space above the stored cold water C. It discharges from 3c.

  At this time, the supercooling water C (−2 ° C.) is released by the collision of the supercooling water C (−2 ° C.) with the perforated plate 3b stretched on the upper accessor 3 and the supercooling water C (−2 ° C.) is reduced to 0 ° C. The ice water floating in the stored water C (0 ° C. cold water) is discharged from the inlet / outlet 3c (that is, the outlet) of the upper inlet / outlet 3 in a state of being changed into the cold water C and a large number of granular ice a contained therein. The stack A is formed in the heat storage tank 1 at a position lower than the inlet / outlet 3c (discharge port in the claims) of the upper inlet / outlet 3, and the stored cold heat (mainly cold latent heat) of the granular ice a is stored. Heat is stored in the tank 1.

  Further, in this ice storage operation, based on the upper surface position h of the ice accumulating layer A detected by the ice sensor 24 and the downward extension length L of the bar-like interlocking member 6 detected by the stroke sensor 25, the ice accumulating layer A As the ice accumulation layer A grows, the upper entrance / exit 3 is gradually moved in the upper space of the stored water C by the growth of the ice accumulation layer A so that the distance between the upper surface and the entrance / exit 3c (discharge port) of the upper entrance / exit 3 is kept at a predetermined size. Thus, the supply state of the discharged granular ice A to the upper surface of the ice accumulation layer A is maintained in a good state regardless of the growth of the ice accumulation layer A.

  Then, when this ice accumulation layer A grows and its lower surface reaches the lower part of the heat storage tank 1 as shown in FIG. 6, the ice storage operation is terminated, and the pre-stage water heat storage operation, the post-stage water heat storage operation, and the Complete a series of heat storage operations consisting of ice operation.

(D) Ice-melting operation When the set air-conditioning start time T2 is reached, the low-temperature storage water C (0 ° C. cold water) and the ice accumulation layer A having the required thickness exist in the heat storage tank 1 when the previous heat storage operation is completed. From the state shown in FIG. 6, as shown in FIG. 7, with the upper inlet / outlet 3 being continuously located in the upper space of the stored water C, the switching on / off valves V <b> 1 to V <b> 7 are opened and closed and the load-side chilled water pump 21 is operated. The stored water C (0 ° C. cold water) in the heat storage tank 1 is circulated in the order of the lower input / output unit 2-the forward path 20 a of the load side cold water circulation path 20 -the load device 19 -the return path 20 b of the load side cold water circulation path 20- Let

  That is, in this ice-melting operation, the stored water C (0 ° C. cold water) of the heat storage tank 1 existing together with the ice accumulation layer A is supplied to the load device 19 through the inlet / outlet 2c of the lower inlet / outlet 2 and By returning the return water C (for example, 16 ° C. cold water) from the load device 19 whose temperature has been raised by the cold heat consumption from the inlet / outlet 3c (discharge port) of the upper inlet / outlet 3, the return water C (16 ° C. cold water) is discharged earlier. In the ice storage operation, water is sprayed on the ice accumulation layer A formed at a position lower than the upper entrance / exit 3 to efficiently melt the ice accumulation layer A, whereby the temperature of the stored water C in the heat storage tank 1 is made uniform and The temperature of the cold water C supplied to the load device 19 is stably kept at 0 ° C. while being stably kept at 0 ° C.

  Further, in this ice melting operation, the ice accumulating layer A of the ice accumulating layer A is detected based on the upper surface position h of the ice accumulating layer A detected by the ice sensor 24 and the downward extension length L of the bar-like interlocking member 6 detected by the stroke sensor 25. As the ice accumulation layer A melts, the drive unit 7 gradually moves the upper entrance / exit 3 in the upper space of the stored water C so that the distance between the upper surface and the entrance / exit 3c (discharge port) of the upper entrance / exit 3 is kept at a predetermined size. Accordingly, the sprinkling state of the return water C (16 ° C. cold water) with respect to the ice accumulation layer A is maintained in a good state regardless of the melting of the ice accumulation layer A.

(E) Pre-stage water heat radiation operation When the ice sensor 24 detects the disappearance of the ice accumulating layer A due to melting in the above ice melting operation, the upper entrance 3 is lowered by the drive device 7 as shown in FIG. In this state, the stored water C in the heat storage tank 1 is transferred to the lower inlet / outlet 2-load-side cold water circulation path 20a-load in this state. It circulates in order of the apparatus 19-the return path 20b of the load side cold water circulation path 20, and the upper entrance / exit 3.

  In other words, when the ice accumulation layer A disappears due to melting in the previous ice-melting operation, the stored water C in the heat storage tank 1 becomes higher than 0 ° C. from the water surface side because of the return water C from the load device 19, In the pre-stage water heat radiation operation, after disappearance of the ice accumulation layer A by melting, the stored water temperature ta at the lower part of the heat storage tank detected by the first to third temperature sensors 22a to 22c, the stored water temperature tb at the upper and lower intermediate parts of the heat storage tank, The return water C (16 ° C. cold water) from the load device 19 is stored until each of the stored water temperatures tc in the upper part of the heat storage tank rises to the first set temperature t1 (in this example, t1 = 4 ° C.). Return water C (16 ° C. cold water) from the load device 19 is discharged from the inlet / outlet 3c (discharge port) of the upper inlet / outlet 3 located in the water near the water surface and returned to the upper part of the heat storage tank 1. Specific gravity with stored water C (0 ° C cold water) in heat storage tank 1 The temperature of the stored water C in the heat storage tank 1 is uniformly and gradually increased from approximately 0 ° C. to approximately 4 ° C. by mixing, thereby preventing a rapid and large temperature change of the cold water C supplied to the load device 19. .

(F) Rear-stage water heat radiation operation In the above-mentioned front-stage water heat radiation operation, the stored water temperature ta at the lower part of the heat storage tank detected by the first to third temperature sensors 22a to 22c, the stored water temperature tb at the upper and lower intermediate parts of the heat storage tank, and the heat storage tank Even after each of the upper storage water temperatures tc has risen to the first set temperature t1 (in this example, t1 = 4 ° C.), the operation mode continues as shown in FIG. In a state where the stored water C is positioned in the vicinity of the water surface, the stored water C in the heat storage tank 1 is sent to the lower input / output unit 2-the forward path 20 a of the load side cold water circulation path 20-the load device 19-the return path of the load side cold water circulation path 20. 20b—circulate in the order of the upper / lower unit 3.

  That is, in the latter stage water heat radiation operation, the lower storage water C (4 ° C. cold water) in the heat storage tank 1 is supplied to the load device 19 through the inlet / outlet 2 c of the lower inlet / outlet 2, and the temperature rises due to the consumption of cold heat in the load device 19. The return water C (16 ° C. cold water) from the warm load device 19 is radially dispersed in a plan view from the inlet / outlet 3c (discharge port) of the upper inlet / outlet 3 positioned in the water near the surface of the stored water C to store the heat. By discharging horizontally into the upper stored cold water C, the return water C (16 ° C. cold water) from the load device 19 having a high specific gravity and a low specific gravity is present on the upper side in the tank, and a high specific gravity of 4 ° C. While maintaining the temperature stratification state in which the stored water C exists on the lower side in the tank, the boundary K between the lower stored water C (4 ° C. cold water) and the upper stored water C (16 ° C. cold water) is gradually lowered. Supplying cold water C to the load device 19 in the flow form in the tank It is made to take out from the lower part of the heat tank 1, and this uses up the low temperature stored water (4 degreeC cold water) of the lower side in the thermal storage layer 1 as shown in FIG. 10 (in other words, the return water (16 The temperature of the cold water C supplied to the load device 19 is stably kept at approximately 4 ° C. until the heat storage tank 1 is filled with the cold water (° C.).

  In short, in the present embodiment, the operation controller 26 that executes the operation controls (A) to (F) described above has the discharge port X (the inlet / outlet 3c of the upper inlet / outlet 3) in the heat storage tank 1 during the ice storage operation. By disposing granular ice a from the discharge port X in the upper space of the stored water C, an ice accumulation layer A floating in the stored water C is formed at a position lower than the discharge port X, and this In the ice-breaking operation after the ice storage operation, the discharge port X (the inlet / outlet 3c of the upper inlet / outlet 3) is similarly positioned in the space above the stored water C in the heat storage tank 1, and the discharge port X is replaced with granular ice a. The ice accumulation layer A is melted by discharging the return water C from the cold energy consuming device 19, and in addition, in the water heat radiation operation following the ice melting operation, the discharge port X (the inlet / outlet 3 c of the upper inlet / outlet unit 3) is stored. A state where the water is located near the surface of the stored water C in the tank 1 Is lowered, by ejecting the return water C than cold consuming device 19 from the discharge port X, it constitutes a driving control means for returning the return water C at the top of the heat storage tank 1.

  The operation controller 26 also keeps the distance between the upper surface of the ice accumulation layer A and the discharge port X (the inlet / outlet 3c of the upper inlet / outlet 3) at a predetermined size during the ice storage operation. Along with the growth of A, the discharge port X is raised, and the distance between the upper surface of the ice accumulation layer A and the discharge port X (the inlet / outlet 3c of the upper inlet / outlet 3) is kept at a predetermined size during the ice-breaking operation. The discharge port X is lowered as the ice accumulation layer A melts.

[Another embodiment]
Next, other embodiments of the present invention will be listed.
In the above-described embodiment, the example in which the inlet / outlet 3c (discharge port X) of the upper inlet / outlet 3 is located in the vicinity of the water surface of the stored water C in both the front-stage water heat radiation operation and the rear-stage water heat radiation operation has been described. Instead, in the upstream water heat radiation operation, the return water C is discharged from the inlet / outlet 3c (discharge port X) of the upper inlet / outlet 3 located in the upper space of the stored water C, as in the ice-melting operation. In the state where the mixing of the stored water C is promoted and the outlet 3c (discharge port X) of the upper inlet / outlet 3 is lowered so as to be positioned in the vicinity of the water surface of the stored water C in the subsequent water radiating operation. By discharging the return water C, the temperature stratified state of the stored water C may be maintained.

  In the above-described embodiment, an example in which one discharge port X (the inlet / outlet 3c of the upper inlet / outlet unit 3) is provided in the heat storage tank 1 has been described, but instead, the discharge port X is dispersed in a plan view to store the heat storage tank 1. A plurality of them may be provided.

  Moreover, in the above-mentioned embodiment, although the structure which provides only one heat storage tank 1 was shown, it replaces with this and provides the some heat storage tank 1 in parallel, and equips each of these heat storage tanks 1 with the discharge port X. It may be configured.

  The discharge port X is not limited to a structure in which the granular ice a and the return water C are radially dispersed in a plan view and discharged horizontally, but the granular ice a and the return water C are in one horizontal direction or in two horizontal directions opposite to each other. It may be a structure that discharges toward the surface, and the specific structure can be variously changed.

  In the practice of the present invention, the generation of the granular ice a is not limited to the supercooling release method. For example, the granular ice is generated by scraping the layered ice or the massive ice is crushed to generate the granular ice. It may be a method.

  In the above-described embodiment, an example in which the cold energy stored in the heat storage tank 1 is used for air conditioning is shown. However, in the implementation of the present invention, the use of the cold heat stored in the heat storage tank 1 is not limited to air conditioning, and cooling of articles. Any application may be used.

Diagram showing the overall configuration of the ice heat storage facility Perspective view The figure which shows the driving | running form of pre-stage water heat storage driving The figure which shows the mode of operation of latter stage water heat storage operation Diagram showing the operation mode of ice storage operation The figure which shows the completion state of thermal storage operation Diagram showing the operation mode of ice-free operation The figure which shows the driving | running form of front | former stage water heat radiation driving | operation The figure which shows the mode of operation of latter stage water heat radiation operation Diagram showing the completion of heat dissipation operation

DESCRIPTION OF SYMBOLS 1 Thermal storage tank a Granular ice C Water A Ice accumulation layer 19 Cold-heat consumption apparatus X Discharge port 26 Operation control means
7 drive unit

Claims (2)

An ice storage operation in which granular ice is supplied to the heat storage tank to form an ice accumulation layer floating in the stored water in the heat storage tank, and the cold water supplied to the cold energy consumption device is taken out from the lower part of the heat storage tank after this ice storage operation An ice heat storage facility that performs an ice-breaking operation in which the ice accumulation layer is melted by return water from the cold energy consumption device,
A drive device is provided to move the discharge port arranged above the heat storage tank up and down,
In the ice storage operation, the discharge device is positioned in the upper space of the stored water in the heat storage tank by the drive device , and the granular ice is discharged from the discharge port, so that the lower position than the discharge port. While forming an ice accumulation layer,
With the growth of the ice accumulation layer, the ejection port is raised by the driving device in a state in which the separation dimension between the upper surface of the ice accumulation layer and the ejection port is maintained at a predetermined dimension.
In the ice-melting operation, the discharge port is positioned higher than the ice accumulation layer in the space above the stored water in the heat storage tank by the driving device , and the return water is discharged from the discharge port, whereby the ice set the operation control means to melt the accumulated layer,
This operation control means
Following the ice-melting operation, while taking out the cold water supplied to the cold energy consumption device from the lower part of the heat storage tank, the water heat radiation operation to return the return water from the cold energy consumption apparatus to the upper part of the heat storage tank,
In this water heat radiation operation, the drive device positions the discharge port in the vicinity of the water surface of the stored water in the heat storage tank, and discharges the return water from the discharge port, whereby the return water is discharged from the heat storage tank. The ice heat storage equipment that is configured to return to the top of the . The operation control means includes
In the ice-breaking operation, the discharge port is lowered by the driving device as the ice accumulation layer melts in a state in which a distance between the upper surface of the ice accumulation layer and the discharge port is maintained at a predetermined size. The ice heat storage facility according to 1.

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