WO2017164201A1

WO2017164201A1 - Cooling system, and method for controlling cooling system

Info

Publication number: WO2017164201A1
Application number: PCT/JP2017/011321
Authority: WO
Inventors: 寿人佐久間; 吉川　実; 雅人矢野; 正樹千葉
Original assignee: 日本電気株式会社
Priority date: 2016-03-25
Filing date: 2017-03-22
Publication date: 2017-09-28
Also published as: JPWO2017164201A1

Abstract

In a cooling system in which a plurality of refrigeration cycles are combined, it is difficult to effectively cool according to the amount of heat emitted by an object to be cooled, and therefore, this cooling system has: a first cooling means provided with a first refrigerant transport means for circulating a first refrigerant that has received heat from the object to be cooled; a second refrigerant transport means connected to the first refrigerant transport means, the second refrigerant transport means for circulating branch refrigerant that is a portion of the first refrigerant; a second cooling means that receives heat via a second refrigerant from the first refrigerant circulating in the first refrigerant transport means, and that cools the branch refrigerant; and a heat storage means for storing heat transported by the second refrigerant.

Description

COOLING SYSTEM AND COOLING SYSTEM CONTROL METHOD

The present invention relates to a cooling system used for cooling an electronic device or the like and a method for controlling the cooling system, and more particularly, to a cooling system using a phase change of a refrigerant and a method for controlling the cooling system.

In recent years, the heat generation amount and the heat generation density have increased with the downsizing and higher performance of electronic devices. In order to efficiently cool such electronic devices and the like, it is necessary to adopt a cooling method having a high cooling capacity. As one of cooling systems having a high cooling capacity, there is a cooling system using a phase change of a refrigerant.

An example of a cooling system using refrigerant phase change is described in Patent Document 1. The related refrigeration apparatus described in Patent Document 1 is a cooling system that combines a vapor compression refrigerator and an adsorption refrigerator.

The related refrigeration apparatus has an adsorption refrigerator having a first adsorber and a second adsorber, a first vapor compression refrigerator, and a second vapor compression refrigerator.

The first and second vapor compression refrigerators include a first and second compressor, first and second condensers (heat radiators), first and second decompressors, an evaporator, and first and second accumulators. Is provided. Note that the evaporators of the first and second vapor compression refrigerators are integrated.

Further, the adsorption refrigerator includes a first and second adsorber, a first and second adsorbent heat exchanger, a first and second water heat exchanger, an outdoor heat exchanger, and the like.

In the related refrigeration apparatus, the adsorbent in the adsorber in the regenerated state is heated by the first condenser provided in the first vapor compression refrigerator, and the second vapor compression is performed by the cooling action of the adsorber in the adsorbed state. The second condenser of the type refrigerator is cooled. The first adsorber and the second adsorber are switched between an adsorption state and a regeneration state in which the adsorbed vapor refrigerant is desorbed and regenerated at regular intervals.

By adopting such a configuration, the pressure in the condenser of the second vapor compression refrigeration machine can be reduced, so that the power (compression work) of the compressor of the second vapor compression refrigeration machine can be reduced. it can. Therefore, according to the related refrigeration apparatus, a sufficient refrigeration capacity can be obtained with a small amount of power in the refrigeration apparatus in which the first and second vapor compression refrigerators and the adsorption refrigerator are combined.

JP-A-11-190566 (paragraphs [0005] to [0019], FIG. 1)

As described above, the related refrigeration apparatus described in Patent Document 1 uses a second vapor compression refrigeration by an adsorption refrigerator that desorbs the adsorbed refrigerant using the exhaust heat of the first vapor compression refrigerator. It is set as the structure which cools the condenser with which a machine is equipped. That is, a primary cooling device such as a compression refrigeration cycle takes heat from the object to be cooled to generate warm heat, and a secondary cooling device such as an adsorption refrigeration cycle converts this warm heat to cold. A related cooling device including such a primary cooling device and a secondary cooling device can efficiently cool one cooling target by combining the cold heat generated by the primary cooling device and the secondary cooling device, respectively. It is.

冷却 Generally, the cooling device is operated at the rated power with the highest efficiency in order to obtain the required amount of cooling heat with the minimum power. However, if the amount of cooling necessary for cooling the cooling target is equal to or less than the rated cooling capacity of the primary cooling device, that is, equal to or less than the amount of cooling generated by the primary cooling device during rated operation, surplus cooling is generated.

Specifically, for example, as shown in FIG. 4A, it is assumed that the primary cooling device is operating at a rated cooling capacity of 20 kW. The amount of cold generated by the secondary cooling device generally varies depending on the amount of cold generated by the primary cooling device. Here, for simplicity, it is assumed that the secondary cooling device generates 50% of the cold generated by the primary cooling device. That is, the secondary cooling device is operated at a rated cooling capacity of 10 kW. At this time, it is assumed that the amount of cooling (necessary cooling) necessary for cooling the object to be cooled is equal to or less than the rated cooling capacity of the primary cooling device, for example, 15 kW. In this case, if the primary cooling device and the secondary cooling device are operated at the rated cooling capacity of 20 kW and 10 kW, respectively, excessive cooling (excess cooling) is generated.

On the other hand, as shown in FIG. 4B, the primary cooling device and the secondary cooling are performed so that the sum of the cooling heat generated by the primary cooling device and the secondary cooling device matches the cooling heat necessary for cooling the object to be cooled. When the device is operated, no excessive cooling is generated. However, in this case, since the operation is performed in a state in which the cooling capacity is greatly reduced as compared with the rated operation, the cooling efficiency is significantly reduced.

As described above, in the cooling system in which a plurality of refrigeration cycles are combined, there is a problem that it is difficult to efficiently cool in accordance with the heat generation amount of the cooling target.

An object of the present invention is a cooling system that solves the above-described problem that it is difficult to efficiently cool a cooling system that combines a plurality of refrigeration cycles according to the amount of heat to be cooled, and It is to provide a control method of a cooling system.

The cooling system of the present invention is connected to a first cooling means having a first refrigerant transporting means through which a first refrigerant received from a cooling target circulates, and to the first refrigerant transporting means. The second refrigerant transporting means through which the branching refrigerant that is a part circulates, and the second refrigerant that receives heat from the first refrigerant circulating through the first refrigerant transporting means via the second refrigerant and cools the branching refrigerant. It has a cooling means and a heat storage means for storing heat transported by the second refrigerant.

The cooling system control method of the present invention is connected to a first cooling means having a first refrigerant transporting means through which a first refrigerant received from a cooling target circulates, and to the first refrigerant transporting means. Heat is received from the first refrigerant circulating through the first refrigerant transporting means through the second refrigerant transporting means through which the branching refrigerant that is a part of the refrigerant circulates, and cools the branching refrigerant Controlling the flow rate of the second refrigerant passing through the heat storage tank with respect to the cooling system having the second cooling means and the heat storage tank storing the second refrigerant that transports the cold generated by the second cooling means. To do.

According to the cooling system and the cooling system control method of the present invention, cooling can be efficiently performed according to the heat generation amount of the cooling target even in the case of a configuration in which a plurality of refrigeration cycles are combined.

It is the schematic which shows the structure of the cooling system which concerns on the 1st Embodiment of this invention. It is the schematic which shows the structure of the cooling system which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating operation | movement of the cooling system which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating another operation | movement of the cooling system which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating another operation | movement of the cooling system which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating operation | movement of a related cooling device. It is a figure for demonstrating another operation | movement of the related cooling device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic diagram showing a configuration of a cooling system 100 according to the first embodiment of the present invention. Broken line arrows in the figure indicate heat transfer.

The cooling system 100 according to the present embodiment includes a first cooling means 110, a second cooling means 120, a second refrigerant transport means 121, and a heat storage means 130.

1st cooling means 110 is provided with the 1st refrigerant transportation means 111 through which the 1st refrigerant which received heat (H1) from cooling object 10 circulates. The second refrigerant transport means 121 is connected to the first refrigerant transport means 111, and a branched refrigerant that is a part of the first refrigerant circulates. The second cooling means 120 receives heat (H2) from the first refrigerant circulating through the first refrigerant transport means 111 via the second refrigerant, and cools (H3) the branched refrigerant. The heat storage means 130 stores heat transported by the second refrigerant.

As described above, the cooling system 100 according to the present embodiment includes the heat storage means 130. Therefore, even if excessive heat is generated according to the cooling capacity of the first cooling unit 110 and the second cooling unit 120 and the amount of heat received from the cooling target 10, the heat storage unit 130 stores this heat. be able to. As a result, after the heat storage means 130 performs the necessary heat storage, the operation of the first cooling means 110 and the second cooling means 120 is stopped, and cooling is performed by the heat stored in the heat storage means 130, for example, cold heat. It becomes possible to do.

Here, the heat storage means 130 may include a heat storage tank that stores the second refrigerant, and the heat storage tank may be positioned in a flow path through which the second refrigerant circulates. In addition, the second refrigerant can be configured to transport the cold generated by the second cooling means 120. Not limited to this, the second refrigerant may be configured to transport the heat received from the first refrigerant circulating in the first refrigerant transport means 111.

The first cooling means 110 can be configured to use a vapor compression refrigeration cycle. Further, the second cooling means 120 can be configured to use either an adsorption refrigeration cycle or an absorption refrigeration cycle. At this time, a low boiling point material can be used as the first refrigerant. For example, an organic refrigerant such as hydrofluorocarbon or hydrofluoroether can be used. In addition, typically, water can be used as the second refrigerant.

Next, the cooling system control method according to the present embodiment will be described. The control method of the cooling system according to the present embodiment is a control method for a cooling system having a first cooling means, a second refrigerant transporting means, a second cooling means, and a heat storage tank.

Here, the first cooling means includes first refrigerant transporting means for circulating the first refrigerant received from the object to be cooled. The second refrigerant transporting means is connected to the first refrigerant transporting means, and a branched refrigerant that is a part of the first refrigerant circulates. The second cooling means receives heat from the first refrigerant circulating through the first refrigerant transport means via the second refrigerant, and cools the branched refrigerant. And a heat storage tank stores the 2nd refrigerant | coolant which conveys the cold heat which a 2nd cooling means produces | generates. The flow rate of the 2nd refrigerant | coolant which goes through said heat storage tank with respect to the cooling system comprised in this way is controlled. Thereby, the excess cooling heat produced according to the cooling capacity of the first cooling means and the second cooling means and the amount of heat received from the cooling target can be stored. As a result, the operations of the first cooling means and the second cooling means are stopped, and cooling can be performed by the cold heat of the second refrigerant stored in the heat storage tank.

Here, when the amount of heat received from the object to be cooled is equal to or less than the amount of heat generated when the first cooling means operates at the reference cooling capacity, the amount of heat generated by the first cooling means is equal to the amount of heat received. In this way, the first cooling means may be controlled. And it can be set as the structure which controls the flow volume of the 2nd refrigerant | coolant which passes along a thermal storage tank so that the 2nd refrigerant | coolant which conveys the cold produced | generated by the 2nd cooling means may be stored in a thermal storage tank. Here, the reference cooling capacity described above is typically a rated cooling capacity.

In this case, the control method as described with reference to FIG. 4B, that is, the first cooling means and the second cooling means generate the first cooling means as compared with the case where control is performed so as to match the amount of heat received. The cooling means operates in a state closer to the reference cooling capacity (rated cooling capacity). Therefore, it becomes possible to cool efficiently.

As described above, according to the cooling system 100 and the cooling system control method of the present embodiment, even when the configuration is a combination of a plurality of refrigeration cycles such as the first cooling means and the second cooling means. The cooling can be efficiently performed according to the heat generation amount of the cooling target.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. FIG. 2 schematically shows the configuration of a cooling system 1000 according to the second embodiment of the present invention. In the figure, solid and broken arrows indicate the refrigerant flow, and white arrows indicate the heat flow.

The cooling system 1000 according to the present embodiment includes a first cooling device (first cooling means) 1100, a second cooling device (second cooling means) 1200, a second refrigerant transport unit (second refrigerant transport means). ) 1210, and a heat storage device (heat storage means) 1300.

Here, the cooling system 1000 according to the present embodiment has a configuration in which a plurality of refrigeration cycles including the first cooling device 1100 and the second cooling device 1200 are combined. That is, the cooling system 1000 is an exhaust heat recovery type in which the second cooling device 1200 further cools the cooling target 10 using the heat recovered by the first cooling device 1100 cooling the cooling target 10 as an energy source. Cooling system. Here, the cooling target 10 is an electronic device such as a server.

The first cooling device 1100 includes an evaporator (evaporating means) 1110, a compressor (compressing means) 1120, a condenser (condensing means) 1130, an expansion valve (expanding means) 1140, and a first refrigerant transport section (first (Refrigerant transport means) 1150, and constitutes a vapor compression refrigeration cycle.

The evaporator 1110 is configured by a radiator or the like, and generates a refrigerant vapor that is vaporized by receiving heat from the first refrigerant. The compressor 1120 adiabatically compresses the refrigerant vapor to generate high-pressure refrigerant vapor. The condenser 1130 condenses the high-pressure refrigerant vapor to generate a high-pressure refrigerant liquid. The expansion valve 1140 expands the high-pressure refrigerant liquid to generate a low-pressure refrigerant liquid.

The first refrigerant transport unit 1150 constitutes a flow path of the first refrigerant that flows back from the evaporator 1110 to the evaporator 1110 via the compressor 1120, the condenser 1130, and the expansion valve 1140. As the first refrigerant, a low boiling point material such as an organic refrigerant such as hydrofluorocarbon or hydrofluoroether can be used. A solid line arrow in FIG. 2 indicates the flow of the first refrigerant.

The second cooling device 1200 constitutes either an adsorption refrigeration cycle or an absorption refrigeration cycle. In the present embodiment, a case where an adsorption refrigerator 1201 having an adsorption refrigeration cycle is used as the second cooling device 1200 will be described. The adsorption refrigeration machine 1201 circulates water or the like as a second refrigerant with a pump 1202 and cools hot water with a cooling tower 1203 or the like. A broken-line arrow in FIG. 2 indicates the flow of water as the second refrigerant of the adsorption refrigeration machine 1201.

The second refrigerant transport unit 1210 constitutes a flow path through which the branched refrigerant that is a part of the first refrigerant circulates between the evaporator 1110 and the compressor 1120 and between the evaporator 1110 and the expansion valve 1140. .

The condenser 1130 exchanges heat between the high-pressure refrigerant vapor flowing through the first refrigerant transport portion 1150 and the second refrigerant on the heat receiving side of the second cooling device 1200. Further, the heat exchanger (heat exchanging means) 1220 for exchanging heat between the branched refrigerant circulated by the second refrigerant transport unit 1210 and the second refrigerant on the cooling side of the second cooling device 1200 may be provided. it can.

The heat storage device 1300 stores heat transported by the second refrigerant. The heat storage device 1300 can include a heat storage tank that stores the second refrigerant, and can be configured to be located in a flow path through which the second refrigerant circulates. In addition, as shown in FIG. 2, the heat storage device 1300 can be configured to be positioned in the flow path of the second refrigerant on the cooling side of the second cooling device 1200. That is, FIG. 2 shows a case where the heat storage device 1300 is installed in the water circulation path between the adsorption refrigerator 1201 and the heat exchanger 1220. In this case, the water as the second refrigerant transports the cold generated by the second cooling device 1200.

Next, the operation of the cooling system 1000 according to the present embodiment will be described. Below, the case where the cooling system 1000 is used for cooling a server etc. is demonstrated as an example. Therefore, the temperatures described below are typical numerical examples in this case.

First, the operation of the first cooling device 1100 will be described. The refrigerant liquid (first refrigerant) that has flowed into the evaporator 1110 composed of a radiator or the like is vaporized by the exhaust heat of about 40 to 50 ° C. sent from the cooling target 10 such as a server and becomes refrigerant vapor. As the refrigerant vapor is adiabatically compressed by the compressor 1120, the pressure rises and the temperature of the refrigerant vapor rises to about 50 to 100 ° C. In order to use the heat of the refrigerant vapor whose temperature has risen in the second cooling device 1200, heat is exchanged between the refrigerant and water (second refrigerant) by the condenser 1130. As a result, the heat of the refrigerant moves to the water, hot water of about 50 to 100 ° C. is generated, and the temperature of the refrigerant decreases. The refrigerant condensed and liquefied as the temperature decreases is reduced in pressure by the expansion valve 1140. Thereafter, it flows again into the evaporator 1110.

Next, the operation of the second cooling device 1200 will be described. Heat is transferred to the adsorption refrigeration machine 1201 through hot water of about 50 to 100 ° C. received by heat exchange in the condenser 1130. The adsorption refrigeration machine 1201 generates cold water of about 5 to 20 ° C. using the warm heat, and cools the branched refrigerant via the heat exchanger 1220.

The branched refrigerant cooled by the heat exchanger 1220 is condensed and liquefied and circulated by the second refrigerant transport unit 1210. Since the second refrigerant transport unit 1210 is connected between the evaporator 1110 and the expansion valve 1140, the condensed and liquefied branch refrigerant merges with the refrigerant liquid whose pressure has been reduced by the expansion valve 1140, and returns to the evaporator 1110. . In addition, as shown in FIG. 2, it is good also as a structure provided with drive parts 1230, such as a pump which circulates a branch refrigerant, in the flow path of the branch refrigerant which the 2nd refrigerant transport part 1210 comprises.

The refrigerant liquid returned to the evaporator 1110 is vaporized by exhaust heat from the cooling target 10 such as a server. The refrigerant vapor evaporated in the evaporator 1110 branches and flows into the second refrigerant transport part 1210 and the first refrigerant transport part 1150 connected between the evaporator 1110 and the compressor 1120. The branched refrigerant circulated by the second refrigerant transport unit 1210 flows into the heat exchanger 1220 again.

The cooling system 1000 can include a flow rate control unit (flow rate control unit) that controls the flow rate of the second refrigerant that passes through the heat storage tank provided in the heat storage device 1300. The flow rate control unit (not shown) can typically be configured using a flow rate control valve.

Moreover, the cooling system 1000 can be configured to include a first cooling device 1100, a second cooling device 1200, and a control unit (control means) that controls the flow rate control unit. At this time, the control unit (not shown) operates the cooling system 1000 as follows based on at least one of the flow rate and temperature of the first refrigerant, the flow rate and temperature of the second refrigerant, and the power consumption of the cooling target. It can be set as the structure which controls a flow control part so that it may do.

Hereinafter, the operation of the control unit provided in the cooling system 1000 and the control method of the cooling system 1000 will be described.

First, a case will be described in which the amount of heat received from the object 10 to be cooled is larger than the amount of heat generated when the first cooling device 1100 operates at the reference cooling capacity. The amount of heat received at this time is assumed to be smaller than the total amount of cold heat, which is the total amount of cold heat generated when the first cooling device 1100 and the second refrigerant transport unit 1210 operate at the reference cooling capacity. Here, the reference cooling capacity is typically the rated cooling capacity, and the following description will be made assuming that the reference cooling capacity is the rated cooling capacity.

Specifically, for example, the rated cooling capacity of the first cooling device 1100 is 20 kW, and the rated cooling capacity of the second cooling device 1200 is set by the heat generated at that time. Here, it is assumed that the rated cooling capacity of the second cooling device 1200 is 10 kW. Then, it is assumed that the cooling target 10 is generating 25 kW of heat that is larger than the first cooling device 1100 rated cooling capacity (20 kW).

At this time, as shown in FIG. 3A, the first cooling device 1100 and the second cooling device 1200 are controlled so that the first cooling device 1100 and the second cooling device 1200 each operate at the rated cooling capacity. Then, the amount of surplus cooling heat (5 kW) that is the difference between the total cooling amount (30 kW) that is the sum of the cooling amounts generated by the first cooling device 1100 and the second cooling device 1200 and the amount of heat received from the cooling target 10 (25 kW). ).

That is, the 1st cooling device 1100 and the 2nd cooling device 1200 operate | move by a rated cooling capacity, respectively, and produce | generate cold of 20 kW and 10 kW. Of the generated 30 kW of cold energy, 25 kW can be used for cooling the cooling object 10 (necessary cold energy), and the remaining 5 kW of cold energy can be stored. Specifically, the flow rate control unit is controlled so that water (second refrigerant) having a capacity for transporting the excess amount of cold heat (5 kW) is stored in the heat storage tank.

Next, a case where the amount of heat received from the object 10 to be cooled is equal to or less than the amount of heat generated when the first cooling device 1100 operates at the rated cooling capacity will be described. Specifically, for example, as illustrated in FIG. 3B, it is assumed that the cooling target 10 generates heat of 15 kW, which is smaller than the rated cooling capacity (20 kW) of the first cooling device 1100.

At this time, the first cooling device 1100 and the second cooling device 1200 are controlled so that the first cooling device 1100 and the second cooling device 1200 each operate at the rated cooling capacity. Then, the cold heat (10 kW) generated by the second cooling device 1200 is stored. Specifically, the flow control unit is controlled so that water (second refrigerant) transporting cold heat (10 kW) generated by the second cooling device 1200 is stored in the heat storage tank.

Here, since the heat storage tank can increase the heat storage amount in proportion to the volume, it is possible to store in the heat storage tank water having a capacity for transporting all of the cold heat generated by the second cooling device 1200. . In addition, since water as the second refrigerant is inexpensive, the cost of the cooling system 1000 is greatly reduced as compared with the case where the first cooling device 1100 stores a low-boiling organic refrigerant used as the first refrigerant. be able to.

Next, the operation by another control method will be described in the case where the amount of heat received from the cooling target 10 is equal to or less than the amount of cooling generated when the first cooling device 1100 operates at the rated cooling capacity.

In this case, the first cooling device 1100 is controlled such that the amount of heat generated by the first cooling device 1100 is equal to the amount of heat received from the object 10 to be cooled. Specifically, for example, as shown in FIG. 3C, when the heat generation amount of the cooling target 10 is 15 kW, the first cooling device 1100 is controlled so as to generate only the cold energy (15 kW) necessary for cooling. Then, the heat storage device 1300 stores the cold generated by the second cooling device 1200 at this time. Specifically, the flow control unit is controlled so that water (second refrigerant) transporting cold heat (7.5 kW) generated by the second cooling device 1200 is stored in the heat storage tank.

By controlling the cooling system 1000 to perform such an operation, it is possible to prevent surplus in the cold generated by the first cooling device 1100. Further, when compared with the case where the first cooling device 1100 is operated so that the total amount of cold heat generated by the first cooling device 1100 and the second cooling device 1200 matches the required cold heat (see FIG. 4B). The first cooling device 1100 operates closer to the rated cooling capacity (20 kW). Therefore, the cooling system 1000 can operate with high efficiency.

After performing the heat storage required for the heat storage device 1300 by the operation of the cooling system 1000 described above, the operations of the first cooling device 1100 and the second cooling device 1200 are stopped, and the heat stored in the heat storage device 1300 is stored. It becomes possible to perform cooling.

In the above description, the cooling system 1000 is configured to control the flow rate of water (second refrigerant) that passes through the heat storage tank provided in the heat storage device 1300. However, the present invention is not limited to this, and the amount of cold heat stored may be increased by lowering the water temperature stored in the heat storage tank. This is because the second cooling device 1200 constituting the adsorption refrigeration cycle can adjust the temperature of the generated cold water (second refrigerant).

As described above, according to the cooling system 1000 and the cooling system control method of the present embodiment, even when the configuration is a combination of a plurality of refrigeration cycles, cooling is efficiently performed according to the heat generation amount of the cooling target. can do.

Some or all of the above embodiments can be described as in the following supplementary notes, but are not limited thereto.

(Additional remark 1) It connects with the 1st cooling means provided with the 1st refrigerant | coolant transport means through which the 1st refrigerant | coolant received from cooling object circulates, and the said 1st refrigerant | coolant transport means, One of the said 1st refrigerant | coolants A second refrigerant transporting unit that circulates the branched refrigerant that is a part, and a second refrigerant that receives heat from the first refrigerant that circulates through the first refrigerant transporting unit via the second refrigerant and cools the branched refrigerant Two cooling means;
A heat storage means for storing heat transported by the second refrigerant.

(Additional remark 2) The cooling system described in Additional remark 1 WHEREIN: The said thermal storage means is equipped with the thermal storage tank which stores the said 2nd refrigerant | coolant, and the said thermal storage tank is the cooling located in the flow path through which the said 2nd refrigerant | coolant circulates. system.

(Supplementary note 3) The cooling system according to supplementary note 2, wherein the second refrigerant transports cold heat generated by the second cooling means.

(Supplementary note 4) The cooling system according to supplementary note 3, comprising a flow rate control means for controlling a flow rate of the second refrigerant passing through the heat storage tank.

(Supplementary note 5) In the cooling system according to supplementary note 4, the cooling system includes a control unit that controls the first cooling unit, the second cooling unit, and the flow rate control unit, wherein the control unit includes the cooling unit The amount of heat received from the target is larger than the amount of heat generated when the first cooling means operates at the reference cooling capacity, and the first cooling means and the second cooling means operate at the reference cooling capacity, respectively. The first cooling means and the second cooling means so that each of the first cooling means and the second cooling means operates at a reference cooling capacity when the total cooling quantity is smaller than the total cooling quantity that is generated. A cooling system for controlling the flow rate control means so as to store the second refrigerant having a capacity for transporting an excess amount of cold heat, which is a difference between the total amount of cold energy and the amount of received heat, in the heat storage tank. .

(Additional remark 6) In the cooling system described in additional remark 4, it has a control means which controls the 1st cooling means, the 2nd cooling means, and the flow rate control means, and the control means is from the cooling object. When the amount of heat received is equal to or less than the amount of heat generated when the first cooling means operates at the reference cooling capacity, the first cooling means and the second cooling means are operated at the reference cooling capacity, respectively. The flow rate control unit controls the first cooling unit and the second cooling unit to store the second refrigerant transporting the cold generated by the second cooling unit in the heat storage tank. To control the cooling system.

(Supplementary note 7) In the cooling system described in supplementary note 4, the cooling system includes a control unit that controls the first cooling unit, the second cooling unit, and the flow rate control unit, and the control unit is configured to control the cooling target. When the amount of heat received is equal to or less than the amount of heat generated when the first cooling means operates at a reference cooling capacity, the amount of heat generated by the first cooling means is equal to the amount of heat received. A cooling system that controls the flow rate control means so as to store the second refrigerant, which controls the first cooling means and transports the cold generated by the second cooling means, in the heat storage tank.

(Supplementary note 8) In the cooling system according to any one of supplementary notes 5 to 7, the control means includes a flow rate and a temperature of the first refrigerant, a flow rate and a temperature of the second refrigerant, and the cooling target. A cooling system that controls the flow rate control means based on at least one of power consumption.

(Supplementary note 9) In the cooling system according to any one of supplementary notes 1 to 8, the first cooling means constitutes a vapor compression refrigeration cycle, and the refrigerant vapor received and vaporized by the first refrigerant is received. Evaporating means for generating, compressing means for compressing the refrigerant vapor to generate high-pressure refrigerant vapor, condensing means for condensing the high-pressure refrigerant vapor to generate high-pressure refrigerant liquid, and expanding the high-pressure refrigerant liquid to generate a low-pressure refrigerant liquid. Expansion means for generating a refrigerant liquid, wherein the first refrigerant transporting means returns from the evaporation means to the evaporation means via the compression means, the condensation means, and the expansion means. 1 refrigerant flow path, and the second refrigerant transporting means forms a flow path through which the branched refrigerant circulates between the evaporation means and the expansion means from between the evaporation means and the compression means. Cooling system.

(Supplementary note 10) The cooling system according to supplementary note 9, further comprising heat exchange means for exchanging heat between the branched refrigerant and the second refrigerant on the cooling side of the second cooling means, wherein the condensing means includes the high-pressure refrigerant. A cooling system for exchanging heat between the steam and the second refrigerant on the heat receiving side of the second cooling means.

(Supplementary note 11) In the cooling system according to any one of Supplementary notes 1 to 10, the second cooling means is a cooling system that constitutes either an adsorption refrigeration cycle or an absorption refrigeration cycle.

(Additional remark 12) It connects with the 1st cooling means provided with the 1st refrigerant | coolant transport means through which the 1st refrigerant | coolant received from the cooling object circulates, the said 1st refrigerant transport means, and one of the said 1st refrigerant | coolants A second refrigerant transporting unit that circulates the branched refrigerant that is a part, and a second refrigerant that receives heat from the first refrigerant that circulates through the first refrigerant transporting unit via the second refrigerant and cools the branched refrigerant A cooling system having two cooling means and a heat storage tank that stores the second refrigerant that transports the cold generated by the second cooling means. A cooling system control method for controlling the flow rate.

(Supplementary note 13) In the cooling system control method described in supplementary note 12, the amount of heat received from the object to be cooled is greater than the amount of heat generated when the first cooling means operates at a reference cooling capacity, and the first If the cooling means and the second cooling means are smaller than the total amount of cold heat generated when the cooling means and the second cooling means operate at the reference cooling capacity, respectively, the first cooling means and the second cooling means are respectively The second refrigerant having a capacity for controlling the first cooling means and the second cooling means so as to operate at a reference cooling capacity and transporting an excess amount of cold heat that is a difference between the total amount of cold heat and the amount of received heat. A control method of a cooling system for controlling a flow rate of the second refrigerant passing through the heat storage tank so as to be stored in the heat storage tank.

(Supplementary note 14) In the control method of the cooling system described in supplementary note 12, when the amount of heat received from the object to be cooled is equal to or less than the amount of cold generated when the first cooling means operates at a reference cooling capacity, The first cooling means and the second cooling means are controlled so that each of the first cooling means and the second cooling means operate at a reference cooling capacity, and the cooling heat generated by the second cooling means is controlled. A cooling system control method for controlling a flow rate of the second refrigerant passing through the heat storage tank so that the second refrigerant to be transported is stored in the heat storage tank.

(Supplementary note 15) In the control method of the cooling system described in supplementary note 12, when the amount of heat received from the object to be cooled is equal to or less than the amount of heat generated when the first cooling means operates at a reference cooling capacity, Controlling the first cooling means such that the amount of cold generated by the first cooling means is equal to the amount of heat received, and transporting the second refrigerant transported by the second cooling means, A cooling system control method for controlling a flow rate of the second refrigerant passing through the heat storage tank so as to be stored in the heat storage tank.

(Supplementary Note 16) In the cooling system control method according to any one of Supplementary Notes 13 to 15, the flow rate and temperature of the first refrigerant, the flow rate and temperature of the second refrigerant, and the power consumption of the cooling target The control method of the cooling system which controls the flow volume of the said 2nd refrigerant | coolant which passes through the said thermal storage tank based on at least one of these.

The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

This application claims priority based on Japanese Patent Application No. 2016-062225 filed on Mar. 25, 2016, the entire disclosure of which is incorporated herein.

DESCRIPTION OF SYMBOLS 100 Cooling system 110 1st cooling means 111 1st refrigerant | coolant transport means 120 2nd cooling means 121 2nd refrigerant | coolant transport means 130 Thermal storage means 1000 Cooling system 1100 1st cooling device 1110 Evaporator 1120 Compressor 1130 Condenser DESCRIPTION OF SYMBOLS 1140 Expansion valve 1150 1st refrigerant | coolant transport part 1200 2nd cooling device 1201 Adsorption-type refrigerator 1202 Pump 1203 Cooling tower 1210 2nd refrigerant | coolant transport part 1220 Heat exchanger 1230 Drive part 1300 Thermal storage apparatus 10 Cooling object

Claims

A first cooling means comprising a first refrigerant transport means through which the first refrigerant received from the object to be cooled circulates;
A second refrigerant transporting means connected to the first refrigerant transporting means, through which a branched refrigerant that is a part of the first refrigerant circulates;
Second cooling means for receiving heat from the first refrigerant circulating through the first refrigerant transporting means via the second refrigerant and cooling the branched refrigerant;
And a heat storage means for storing heat transported by the second refrigerant.
The cooling system according to claim 1,
The heat storage means includes a heat storage tank for storing the second refrigerant,
The heat storage tank is a cooling system located in a flow path through which the second refrigerant circulates.
The cooling system according to claim 2, wherein
The second refrigerant transports cold heat generated by the second cooling means.
The cooling system according to claim 3,
A cooling system comprising flow rate control means for controlling the flow rate of the second refrigerant passing through the heat storage tank.
The cooling system according to claim 4, wherein
Control means for controlling the first cooling means, the second cooling means, and the flow rate control means;
The control means includes
The amount of heat received from the object to be cooled is larger than the amount of heat generated when the first cooling means operates at the reference cooling capacity, and the first cooling means and the second cooling means have the reference cooling capacity, respectively. If it is less than the total amount of cold, which is the total amount of cold generated when operating,
Controlling the first cooling means and the second cooling means such that the first cooling means and the second cooling means each operate at a reference cooling capacity;
A cooling system that controls the flow rate control means so that the second refrigerant having a capacity for transporting an excess amount of cold heat that is a difference between the total amount of cold heat and the amount of received heat is stored in the heat storage tank.
The cooling system according to claim 4, wherein
Control means for controlling the first cooling means, the second cooling means, and the flow rate control means;
The control means includes
When the amount of heat received from the object to be cooled is equal to or less than the amount of heat generated when the first cooling means operates at a reference cooling capacity,
Controlling the first cooling means and the second cooling means such that the first cooling means and the second cooling means each operate at a reference cooling capacity;
A cooling system that controls the flow rate control means so that the second refrigerant that transports the cold generated by the second cooling means is stored in the heat storage tank.
The cooling system according to claim 4, wherein
Control means for controlling the first cooling means, the second cooling means, and the flow rate control means;
The control means includes
When the amount of heat received from the object to be cooled is equal to or less than the amount of heat generated when the first cooling means operates at a reference cooling capacity,
Controlling the first cooling means so that the amount of heat generated by the first cooling means is equal to the amount of heat received;
A cooling system that controls the flow rate control means so that the second refrigerant that transports the cold generated by the second cooling means is stored in the heat storage tank.
The cooling system according to any one of claims 5 to 7,
The control unit controls the flow rate control unit based on at least one of a flow rate and temperature of the first refrigerant, a flow rate and temperature of the second refrigerant, and power consumption of the cooling target.
The cooling system according to any one of claims 1 to 8,
The first cooling means constitutes a vapor compression refrigeration cycle,
Evaporating means for generating a refrigerant vapor vaporized by receiving heat from the first refrigerant;
Compression means for compressing the refrigerant vapor to generate high-pressure refrigerant vapor;
Condensing means for condensing the high-pressure refrigerant vapor to produce a high-pressure refrigerant liquid;
Expansion means for expanding the high-pressure refrigerant liquid to generate a low-pressure refrigerant liquid,
The first refrigerant transport means constitutes a flow path of the first refrigerant that flows back from the evaporation means to the evaporation means via the compression means, the condensation means, and the expansion means,
The cooling system, wherein the second refrigerant transport means constitutes a flow path through which the branched refrigerant circulates between the evaporation means and the expansion means between the evaporation means and the compression means.
The cooling system according to claim 9,
Heat exchange means for exchanging heat between the branched refrigerant and the second refrigerant on the cooling side of the second cooling means;
The condensing unit exchanges heat between the high-pressure refrigerant vapor and the second refrigerant on the heat receiving side of the second cooling unit.
The cooling system according to any one of claims 1 to 10,
The second cooling means constitutes one of an adsorption refrigeration cycle and an absorption refrigeration cycle.
A first cooling means comprising a first refrigerant transport means through which the first refrigerant received from the object to be cooled circulates;
A second refrigerant transporting means connected to the first refrigerant transporting means, through which a branched refrigerant that is a part of the first refrigerant circulates;
Second cooling means for receiving heat from the first refrigerant circulating through the first refrigerant transporting means via the second refrigerant and cooling the branched refrigerant;
For a cooling system having a heat storage tank that stores the second refrigerant that transports the cold generated by the second cooling means,
A cooling system control method for controlling a flow rate of the second refrigerant passing through the heat storage tank.
In the cooling system control method according to claim 12,
The amount of heat received from the object to be cooled is larger than the amount of heat generated when the first cooling means operates at the reference cooling capacity, and the first cooling means and the second cooling means have the reference cooling capacity, respectively. If it is less than the total amount of cold, which is the total amount of cold generated when operating,
Controlling the first cooling means and the second cooling means such that the first cooling means and the second cooling means each operate at a reference cooling capacity;
A flow rate of the second refrigerant passing through the heat storage tank is controlled so that the second refrigerant having a capacity for transporting an excess amount of cold heat that is a difference between the total cold heat amount and the received heat amount is stored in the heat storage tank. Yes Cooling system control method.
In the cooling system control method according to claim 12,
When the amount of heat received from the object to be cooled is equal to or less than the amount of heat generated when the first cooling means operates at a reference cooling capacity,
Controlling the first cooling means and the second cooling means such that the first cooling means and the second cooling means each operate at a reference cooling capacity;
Control method of a cooling system for controlling a flow rate of the second refrigerant passing through the heat storage tank so that the second refrigerant transporting the cold generated by the second cooling means is stored in the heat storage tank .
In the cooling system control method according to claim 12,
When the amount of heat received from the object to be cooled is equal to or less than the amount of heat generated when the first cooling means operates at a reference cooling capacity,
Controlling the first cooling means so that the amount of heat generated by the first cooling means is equal to the amount of heat received;
Control method of a cooling system for controlling a flow rate of the second refrigerant passing through the heat storage tank so that the second refrigerant transporting the cold generated by the second cooling means is stored in the heat storage tank .
In the cooling system control method according to any one of claims 13 to 15,
The flow rate of the second refrigerant passing through the heat storage tank is controlled based on at least one of the flow rate and temperature of the first refrigerant, the flow rate and temperature of the second refrigerant, and the power consumption of the cooling target. Yes Cooling system control method.