JP7259622B2 - Cooling system and its operation method - Google Patents

Description

The present disclosure relates to cooling systems and methods of operation thereof.

Patent Literature 1 discloses a latent heat storage system. This latent heat storage system includes a large number of heat storage containers containing latent heat storage materials, a heat storage tank installed in a state in which the containers are immersed in a heat medium liquid in the tank, and a heat medium supplied to a heat source device provided at one end of the heat storage tank. A liquid outlet, a return port from the load device, a return port from the heat source device provided at the other end of the tank, an outlet to the load device, and an outlet provided midway between one end of the tank and the other end of the tank. , an intermediate outlet for the heat transfer liquid supplied to the heat source device, and a control means. The control means stops taking out the heat transfer fluid from the intermediate take-out port when the temperature of the heat transfer fluid taken out from the intermediate take-out port drops to a set stop temperature lower than the phase change temperature of the latent heat storage material.

Patent Literature 2 discloses a latent heat cold storage system that uses a cold storage material placed in a heat storage tank. This latent heat cold storage system includes a heat storage tank in which a heat medium liquid is stored, a refrigerator that cools the heat medium liquid extracted from the heat storage tank, a cold storage material that stores cold with the heat medium liquid cooled by the refrigerator, A partition wall that divides the heat storage tank into a first zone in which a cold storage material is arranged and a second zone in which no cold storage material is arranged, and a heat transfer liquid cooled by a refrigerator is supplied to the first zone or the second zone. a supply unit; The upper end of the partition wall is provided at a position above the cold storage material and below the liquid surface of the heat transfer liquid. The heat storage tank has an outlet for the heat transfer liquid at a position above the cold storage material in the first zone and below the upper end of the partition wall. The supply unit adjusts the amount of the heat medium liquid supplied to the first zone and the amount of the heat medium liquid supplied to the second zone according to the temperature of the heat medium liquid taken out from the heat storage tank.

Patent Literature 3 discloses a heat storage device and an operating method thereof that enable heat dissipation operation to be performed while heat storage operation is being performed. This heat storage device includes at least a heat source unit, a heat storage tank, a piping system for circulating a heat medium through these, and a cold/hot water piping system in which the heat storage tank is divided into a plurality of units and each heat storage tank is connected to the load side. and its switching valve. This heat storage device releases heat to the load side by opening the switching valve of the cold/hot water pipe connected to at least one heat storage tank with a large amount of heat storage among the plurality of heat storage tanks. At the same time, the switching valves of the cold/hot water pipes connected to the other heat storage tanks of the plurality of heat storage tanks are closed, and the heat medium is circulated from the heat source equipment to the heat storage tanks to continue heat storage. Then, by switching the connection of the hot and cold water pipes with the switching valve, the connection to the load side is switched sequentially between the heat storage tank that has completed heat dissipation and the heat storage tank that has sufficient heat storage, and heat storage and heat dissipation simultaneous operation is performed.

Japanese Patent No. 3907539 Japanese Patent No. 5414118 JP-A-5-106877

The present disclosure reduces the energy required for cooling the heat medium liquid compared to the conventional technique, and stores and cools the cold storage material while operating the cooling device without changing the flow path of the heat medium liquid for cooling the object to be cooled. Provided are a cooling system capable of switching between an operation for simultaneously cooling an object and an operation for simultaneously cooling a cold storage material and cooling an object to be cooled, and an operating method thereof.

The cooling system according to the present disclosure includes a cold storage unit containing a cold storage material, a heat storage tank storing a heat medium liquid and immersed in the cold storage unit, a mixing tank communicating with the heat storage tank so that the heat medium liquid can flow, and a heat medium. A cooling device that cools the liquid, a first cooling passage in which the heat transfer liquid flows from the mixing tank and flows out to the mixing tank via a first cooling unit for cooling the object to be cooled, and the heat transfer liquid flows into the mixing tank. a second cooling flow path that flows in from and flows out to the heat storage tank via a second cooling unit that is cooled by the cooling device, wherein the melting point of the cold storage material is higher than the melting point of the heat transfer liquid and is set in advance Lower than the temperature to be cooled.

Further, in the operating method of the cooling system according to the present disclosure, the first operation and the second operation are switched when the heat transfer liquid flows through the first cooling flow path to cool the object to be cooled and flows out to the mixing tank. In the first operation, the heat medium liquid flows through the second cooling flow path and is cooled by the cooling device to a temperature lower than the melting point of the cold storage material and higher than the melting point of the heat medium liquid, and is stored in the heat storage tank. and a step of causing the heat transfer liquid having a temperature lower than the melting point of the cold storage material and higher than the melting point of the heat transfer liquid that has flowed out to the heat storage tank to flow through the cold storage unit and store coolness in the cold storage material; is a step in which the heat transfer liquid flows through the second cooling flow path, is cooled by the cooling device to a temperature higher than the melting point of the cold storage material and lower than the preset temperature of the object to be cooled, and flows out to the heat storage tank; and a step of allowing the cold storage material to cool by flowing the heat transfer fluid having a temperature equal to or higher than the melting point of the cold storage material and lower than a preset temperature of the object to be cooled.

The cooling system and its operating method according to the present disclosure send the heat transfer fluid having a higher temperature than the heat transfer fluid in the heat storage tank to the cooling device, and at the same time, cool the object to be cooled to a temperature lower than the temperature of the heat transfer fluid. A heat transfer fluid can be delivered to an object to be cooled. Therefore, while reducing the energy required for cooling the heat transfer fluid, the cooling device is operated without changing the flow path of the heat transfer fluid for cooling the object to be cooled. and an operation in which cooling of the cold storage material and cooling of the object to be cooled are performed at the same time can be switched.

Configuration diagram of the cooling system according to Embodiment 1 Internal structural diagram of the heat storage tank in Embodiment 1 Internal structural diagram of the cold storage unit in Embodiment 1 Configuration diagram of a cooling system according to Embodiment 2 State diagram of the flow of the heat transfer liquid when cold storage in the cold storage material and cooling of the object to be cooled are simultaneously performed in the second embodiment. State diagram of the flow of the heat transfer liquid when cooling the cold storage material and cooling the object to be cooled are performed simultaneously in the second embodiment.

(Knowledge, etc. on which this disclosure is based)
At the time when the inventors came up with the present disclosure, at least the heat source equipment, the heat storage tank, the piping system for circulating the heat medium in these, and the heat storage tank were divided into a plurality of pieces, and each heat storage tank There is a technique for a heat storage device that includes a cold/hot water piping system connected to a load side and a switching valve for the piping system. In this conventional heat storage device, heat is radiated to the load side by opening the switching valve of the cold/hot water pipe connected to at least one heat storage tank with a large amount of heat storage among a plurality of heat storage tanks, and the other heat storage tank is connected to the heat storage tank. Heat is stored by closing the switching valve of the hot/cold water pipe and circulating the heat medium from the heat source machine to the heat storage tank. Then, by switching the connection of the hot and cold water pipes with a switching valve, the connection to the load side is switched sequentially between the heat storage tank that has completed heat dissipation and the heat storage tank that has sufficient heat storage, and heat storage and heat dissipation are performed simultaneously. There was technology in how to operate the equipment. Thereby, the heat storage operation and the operation for cooling the load side can be performed at the same time.

However, in this conventional heat storage device, the temperature of the heat medium returning from the heat storage tank to the heat source equipment drops in an early stage after the start of the heat storage operation, and the difference from the cooling temperature in the heat source equipment becomes smaller. Therefore, the power required to transport the heat transfer liquid increases, and the energy required for cooling the heat medium for cooling the load side by circulating the heat medium in the heat storage tank and the heat storage tank increases. The first problem is that it is necessary to switch the connection of cold/hot water pipes to a plurality of heat storage tanks for operation.

On the other hand, a large number of heat storage containers containing latent heat storage materials, a heat storage tank installed in a state in which the containers are immersed in the heat transfer liquid in the tank, and a heat transfer liquid supplied to the heat source device provided at one end of the storage tank are provided. An outlet, a return port from the load device, a return port from the heat source device provided at the other end of the tank, an outlet to the load device, and a heat source device provided midway between one end of the tank and the other end of the tank When the temperature of the intermediate take-out of the heat transfer liquid supplied to the intermediate take-out and the temperature of the heat transfer liquid taken out from the intermediate take-out decrease to the set stop temperature lower than the phase change temperature of the latent heat storage material, the heat from the intermediate take-out There has been technology for latent heat storage systems with control means to stop withdrawal of liquid medium. Note that the heat source device here is a refrigerator, and heat storage and cool storage are synonymous. As a result, it is possible to suppress an early drop in the temperature of the heat medium liquid from the outlet for the heat medium liquid supplied to the heat source device provided at the end. Therefore, the difference from the cooling temperature in the heat source device becomes large, and the time required for heat storage can be effectively shortened and the amount of heat stored per unit time can be effectively increased.

A heat storage tank in which the heat transfer liquid is stored, a refrigerator that cools the heat transfer liquid extracted from the heat storage tank, a cold storage material that stores cold by the heat transfer liquid cooled by the refrigerator, and a heat storage tank, A partition wall that separates a first zone in which the cold storage material is arranged and a second zone in which the cold storage material is not arranged, and a supply section that supplies the heat transfer liquid cooled by the refrigerator to the first zone or the second zone. The upper end of the partition wall is provided at a position above the cold storage material and below the liquid surface of the heat medium liquid, and the heat storage tank has an outlet for the heat medium liquid in the first zone. The supply unit is located above the material and below the upper end of the partition wall, and the supply unit supplies the heat transfer liquid to the first zone according to the temperature of the heat transfer liquid taken out from the heat storage tank. There have been techniques for latent heat regenerative heat storage systems that regulate the amount of heat transfer fluid supplied to the second zone. As a result, the high-temperature heat transfer fluid can be sent to the refrigerator. Therefore, the difference from the target cooling temperature in the refrigerator becomes large, and a decrease in the coefficient of performance of the refrigerator in the cool storage operation can be suppressed.

However, in the case of these systems, there is a second problem that the cold storage operation and the operation for cooling the load device cannot be performed at the same time.

The present inventors discovered these first and second problems, and came to constitute the subject matter of this disclosure in order to collectively solve these problems.

Therefore, the present disclosure reduces the energy required for cooling the heat medium liquid compared to the conventional technique, and operates the cooling device without changing the flow path of the heat medium liquid for cooling the object to be cooled, while storing and cooling the cold storage material. Provided are a cooling system capable of switching between an operation for simultaneously cooling an object and an operation for simultaneously cooling a cold storage material and cooling an object to be cooled, and an operating method thereof.

(Overview of one aspect of the present disclosure)
A cooling system according to a first aspect of the present disclosure includes:
a cold storage unit containing a cold storage material;
a heat storage tank in which the heat transfer liquid is stored and the cold storage unit is immersed;
a mixing tank in which the heat transfer liquid is communicable with the heat storage tank;
a cooling device for cooling the heat transfer liquid;
a first cooling flow path through which the heat transfer fluid flows from the mixing tank, passes through a first cooling section for cooling an object to be cooled, and flows out to the mixing tank;
a second cooling flow path through which the heat transfer liquid flows from the mixing tank, passes through a second cooling section cooled by the cooling device, and flows out to the heat storage tank;
with
The melting point of the cold storage material is higher than the melting point of the heat transfer liquid and lower than the preset temperature of the object to be cooled.

In the technique according to the first aspect, the heat transfer liquid after being cooled or cooled in the heat storage tank and the heat transfer liquid heated to a high temperature by cooling the object to be cooled are mixed in the mixing tank to obtain the first cooling flow path. Without changing the path of (1), the second cooling flow path can be used to send the heat medium liquid having a temperature higher than that of the heat medium liquid after being stored or cooled in the heat storage tank to the cooling device. In addition, in the second cooling flow path, the temperature difference between the temperature of the heat transfer fluid on the outlet side of the cooling device and the temperature of the heat transfer fluid sent to the cooling device can be increased. Also, the flow rate of the heat transfer fluid required to obtain the same amount of heat exchange in the cooling device can be reduced. Furthermore, the heat transfer liquid having a lower temperature than the heat transfer liquid heated to a high temperature by cooling the object to be cooled can be sent to the object to be cooled. Therefore, less power is required to transport the heat transfer fluid, and less energy is required to cool the heat transfer fluid. Moreover, the cooling operation of the object to be cooled can be performed at the same time. In this way, while reducing the energy required for cooling the heat medium liquid, the cooling device is operated without changing the flow path of the heat medium liquid for cooling the object to be cooled. can be switched between an operation in which cooling is performed at the same time and an operation in which cooling of the cold storage material and cooling of the object to be cooled are performed at the same time.

A second aspect of the present disclosure is, for example, in the cooling system according to the first aspect,
A suction port for the heat transfer fluid in the first cooling flow path may be arranged at a position lower than a discharge port for the heat transfer fluid in the first cooling flow path.

According to the second aspect, the heat transfer liquid that has cooled the object to be cooled and has reached a high temperature is discharged from the first cooling flow path into the mixing tank and mixed with the heat transfer liquid that has been stored or cooled in the heat storage tank. , the temperature of the heat transfer fluid decreases, the density increases and it descends. Therefore, by sucking this heat transfer fluid into the first cooling channel and sending it to the object to be cooled, it is possible to ensure a temperature difference between the heat transfer fluid suction port and the heat transfer fluid discharge port. Therefore, the cooling operation of the object to be cooled can be reliably performed.

A third aspect of the present disclosure is, for example, in the cooling system according to the first aspect or the second aspect,
a first position in the heat storage tank between the mixing tank and the cold storage unit and lower than the liquid level of the heat transfer liquid; and a liquid level of the heat transfer liquid in the mixing tank in the second cooling flow path. a first bypass flow path through which the heat transfer fluid flows, connecting a second position between the position and the second cooling section;
temperature detection means for detecting the temperature of the heat transfer liquid stored in the heat storage tank at a position opposite to the mixing tank with respect to the cold storage unit;
a first flow rate regulator arranged in the first bypass flow path for controlling the flow rate of the heat transfer liquid flowing through the first bypass flow path in accordance with the temperature detected by the temperature detection means;
may be further provided.

When constant operation is performed with a high coefficient of performance in the cooling device, when the temperature of the object to be cooled rises and the temperature of the heat transfer liquid sent from the mixing tank to the cooling device rises, cooling is performed in the second cooling passage. The temperature of the heat transfer fluid exiting the device is also high and may exceed the melting point of the cold storage material under certain conditions. However, according to the third aspect, the heat transfer liquid that flows from the mixing tank into the second cooling flow path and is sent to the cooling device and the heat transfer liquid that flows through the first bypass flow path are mixed in the second cooling flow path. By mixing on the inlet side of the cooling device, the heat transfer liquid having a lower temperature than the heat transfer liquid flowing into the second cooling channel from the mixing tank can be sent to the cooling device. Here, when constant operation is performed with a high coefficient of performance in the cooling device, the temperature of the heat transfer liquid exiting the cooling device in the second cooling passage, that is, the temperature of the heat transfer liquid flowing out to the heat storage tank is also can be lowered. Furthermore, by controlling the flow rate of the heat transfer liquid flowing through the first bypass flow path according to the temperature detected by the temperature detection means, the temperature of the heat transfer liquid flowing out from the second cooling flow path to the heat storage tank can be adjusted. , can be lowered below the melting point of the cold storage material. Therefore, when constant operation is performed with a high coefficient of performance in the cooling device, even when the temperature of the object to be cooled rises, a single cooling device can be used without changing the flow path of the heat transfer liquid for cooling the object to be cooled. , the cold storage operation of the cold storage material and the cooling operation of the object to be cooled can be performed at the same time.

A fourth aspect of the present disclosure is, for example, in the cooling system according to the third aspect,
a third position between the second position and the second cooling section in the second cooling flow path; a fourth position between the position of the liquid surface and a second bypass flow path through which the heat transfer fluid flows;
a second flow rate regulator arranged in the second bypass flow path for controlling the flow rate of the heat transfer liquid flowing through the second bypass flow path in accordance with the temperature detected by the temperature detection means;
may be further provided.

When constant operation is performed with a high coefficient of performance in the cooling device, when the temperature of the cooling object decreases and the temperature of the heat transfer liquid sent from the mixing tank to the cooling device decreases, cooling is performed in the second cooling passage. The temperature of the heat transfer fluid exiting the device is also lowered and, depending on the conditions, may be below the melting point of the cold storage material. However, according to the fourth aspect, the heat transfer liquid that has exited the cooling device in the second cooling flow path and the heat transfer liquid that flows through the second bypass flow path are mixed on the outlet side of the cooling device in the second cooling flow path. By mixing, the heat transfer fluid having a higher temperature than the heat transfer fluid coming out of the cooling device can be sent to the heat storage tank. Furthermore, by controlling the flow rate of the heat transfer liquid flowing through the second bypass flow path according to the temperature detected by the temperature detection means, the temperature of the heat transfer liquid flowing out from the second cooling flow path to the heat storage tank can be adjusted. , the melting point of the cold storage material can be increased. Therefore, when constant operation is performed with a high coefficient of performance in the cooling device, even when the temperature of the object to be cooled is lowered, a single cooling device can be used without changing the flow path of the heat transfer liquid for cooling the object to be cooled. , the cooling operation of the cold storage material and the cooling operation of the object to be cooled can be performed at the same time.

A fifth aspect of the present disclosure, for example, in the cooling system according to any one of the first to fourth aspects,
The mixing tank is
a first storage tank communicating with the heat storage tank so that the heat transfer liquid can flow;
a second storage tank communicating with the first storage tank so that the heat transfer liquid can flow;
has
the second cooling channel,
Flowing the heat transfer liquid from the first storage tank,
The first cooling channel is
Inflowing the heat transfer fluid from the first storage tank and flowing out the heat transfer fluid to the second storage tank,
may be configured.

When constant operation is performed with a high coefficient of performance in the cooling device, when the temperature of the object to be cooled fluctuates greatly and the temperature of the heat transfer liquid sent from the first reservoir to the cooling device also fluctuates greatly, the second cooling flow Similarly, the temperature of the heat transfer medium exiting the cooling device in the passage also fluctuates greatly, and depending on the conditions, it may exceed the melting point of the cold storage material when storing cold, or may fall below the melting point of the cold storage material when cooling. there is a possibility. However, according to the fifth aspect, the heat transfer liquid that has cooled the object to be cooled and has reached a high temperature and flowed out from the first cooling flow path to the second storage tank is temporarily stored in the second storage tank, and then stored in the first storage tank. , the fluctuation in the temperature of the heat transfer fluid sent from the second storage tank to the first storage tank is reduced. In addition, fluctuations in the temperature of the heat transfer liquid that flows from the first storage tank into the second cooling flow path and is sent to the cooling device can also be reduced. Here, when a constant operation is performed with a high coefficient of performance in the cooling device, the temperature of the heat transfer liquid exiting the cooling device in the second cooling flow path, that is, the temperature of the heat transfer liquid flowing out to the heat storage tank also fluctuates. can be made smaller as well. Therefore, when constant operation is performed with a high coefficient of performance in the cooling device, even when the temperature of the object to be cooled fluctuates greatly, the cooling device can be operated without changing the flow path of the heat transfer liquid for cooling the object to be cooled. It is possible to switch between an operation in which cold storage of the cold storage material and cooling of the object to be cooled is performed simultaneously, and an operation in which cooling of the cold storage material and cooling of the object to be cooled are performed simultaneously.

A sixth aspect of the present disclosure is, for example, in the cooling system according to the fifth aspect,
Between the second storage tank and the first storage tank and between the first storage tank and the heat storage tank, a partition wall through which the heat transfer liquid can flow may be further provided.

According to the sixth aspect, by partitioning the adjacent tanks with a partition wall through which the heat transfer fluid can flow, the second storage tank, the first storage tank, and the heat storage tank are arranged in descending order of the temperature of the stored heat transfer fluid. Since it is arranged, the amount of heat transfer from the second storage tank to the heat storage tank is suppressed. As a result, it is possible to keep the temperature of the heat medium liquid in the heat storage tank low before it flows into the cold storage unit, and during the cold storage operation of the cold storage material, the heat medium liquid can be kept below the melting point of the cold storage material. Therefore, while reducing the energy required for cooling the heat transfer fluid, one cooling device can perform the cold storage operation of the cold storage material and the cooling operation of the cooling object without changing the flow path of the heat transfer fluid for cooling the object to be cooled. can be done simultaneously.

A cooling system operating method according to a seventh aspect of the present disclosure includes:
In the cooling system according to the first aspect, the first operation and the second operation are performed when the heat transfer liquid flows through the first cooling channel to cool the object to be cooled and flows out to the mixing tank. A method of operating a cooling system that operates by switching,
The first operation is
a step in which the heat transfer liquid flows through the second cooling passage, is cooled by the cooling device to a temperature lower than the melting point of the cold storage material and higher than the melting point of the heat transfer liquid, and flows out to the heat storage tank;
a step of mixing the heat transfer fluid having a temperature lower than the melting point of the cold storage material and higher than the melting point of the heat transfer fluid, which has flowed out into the heat storage tank, with the heat transfer fluid stored in the heat storage tank;
a step of causing the mixed heat transfer liquid to flow through the cold storage unit and store cold in the cold storage material;
The second operation is
a step in which the heat transfer liquid flows through the second cooling flow path, is cooled by the cooling device to a temperature equal to or higher than the melting point of the cold storage material and lower than the preset temperature of the object to be cooled, and flows out to the heat storage tank; ,
The heat transfer liquid flowing out to the heat storage tank and having a temperature equal to or higher than the melting point of the cold storage material and lower than the preset temperature of the object to be cooled mixes with the heat transfer liquid stored in the heat storage tank. a step;
The mixed heat transfer liquid flows through the cold storage unit and cools the cold storage material.

According to the seventh aspect, while reducing the energy required for cooling the heat transfer liquid, the cooling device is operated while the cooling operation of the cooling target is continued without changing the flow path of the heat transfer liquid for cooling the cooling target. It is possible to switch between the cold storage operation of the cold storage material and the cool release operation of the cold storage material while the cooling is being performed.

An eighth aspect of the present disclosure is, for example, in the driving method according to the seventh aspect,
The cooling system is
a first position in the heat storage tank between the mixing tank and the cold storage unit and lower than the liquid level of the heat transfer liquid; and a liquid level of the heat transfer liquid in the mixing tank in the second cooling flow path. a first bypass flow path through which the heat transfer fluid flows, connecting a second position between the position and the second cooling section;
temperature detection means for detecting the temperature of the heat transfer liquid stored in the heat storage tank at a position opposite to the mixing tank with respect to the cold storage unit;
further comprising
A flow rate of the heat transfer fluid flowing through the first bypass flow path may be controlled according to the temperature detected by the temperature detection means.

According to the eighth aspect, as in the third aspect, when constant operation is performed with a high coefficient of performance in the cooling device, even when the temperature of the cooling object rises, the flow of the heat transfer liquid that cools the cooling object It is possible to simultaneously perform the cold storage operation of the cold storage material and the cooling operation of the object to be cooled with one cooling device without changing the path.

A ninth aspect of the present disclosure is, for example, in the driving method according to the eighth aspect,
The cooling system is
a third position between the second position and the second cooling section in the second cooling flow path; a fourth position between the position of the liquid surface and a second bypass flow path through which the heat transfer liquid flows;
further comprising
A flow rate of the heat transfer fluid flowing through the second bypass flow path may be controlled according to the temperature detected by the temperature detection means.

According to the ninth aspect, as in the fourth aspect, when the cooling device is operated at a constant rate with a high coefficient of performance, even when the temperature of the object to be cooled drops, the flow of the heat transfer fluid that cools the object to be cooled Without changing the path, one cooling device can simultaneously perform the cooling operation of the cold storage material and the cooling operation of the object to be cooled.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters or redundant descriptions of substantially the same configurations may be omitted. This is to avoid the following description from becoming more redundant than necessary and to facilitate understanding by those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided to allow those skilled in the art to fully understand the present disclosure and are not intended to limit the claimed subject matter thereby.

(Embodiment 1)
Embodiment 1 will be described below with reference to FIGS. 1 to 3. FIG.

[1-1. composition]
In FIG. 1, the cooling system 100 includes a heat storage tank 105, a cold storage unit 115, a mixing tank 125, a partition wall 130, a cooling device 135, a first cooling channel 180, a second cooling channel 190, Prepare. The cooling system 100 is a system for efficiently cooling a cooling object 155 to be cooled.

The heat storage tank 105 stores the heat medium liquid 110 and has a cold storage unit 115 immersed therein. The heat transfer fluid 110 is water. As shown in FIGS. 1 and 2, a plurality of cold storage units 115 are arranged in the vertical, horizontal, and height directions. Each of the cold storage units 115 accommodates a cold storage material 120 enclosed in a rectangular parallelepiped aluminum laminate pack, resin case, or the like (see FIG. 3). The cold storage material 120 is a clathrate hydrate that stores cold by undergoing a phase change from liquid to solid and releases cold by undergoing a phase change from solid to liquid. The cold storage material 120 has a melting point (for example, 7° C.) higher than the melting point (0° C.) of the heat transfer fluid 110, and the preset temperature of the object to be cooled 155 (if there is a range, the lower limit ) lower is used. The object to be cooled 155 is, for example, equipment that requires temperature adjustment at 12° C. in the manufacturing process.

The mixing tank 125 stores the heat medium liquid 110 and communicates with the heat storage tank 105 so that the heat medium liquid 110 can flow therethrough. The partition wall 130 is provided between the mixing tank 125 and the heat storage tank 105 so as to allow the heat transfer liquid 110 to flow therethrough.

The first cooling channel 180 has a first cooling portion 185 for cooling the object 155 to be cooled. Therefore, the first cooling unit 185 has a configuration in which the heat transfer liquid 110 flowing therein and the object to be cooled 155 can exchange heat. is cooled. A pump 160 is arranged in the first cooling channel 180 , and the heat transfer liquid 110 flows into the first cooling channel 180 from the suction port 165 , passes through the first cooling portion 185 , and flows out from the discharge port 170 . . The suction port 165 and the discharge port 170 of the first cooling channel 180 are arranged in the heat transfer liquid 110 stored in the mixing tank 125 . The suction port 165 is provided at a position lower than the discharge port 170 .

The second cooling channel 190 has a second cooling portion 195 cooled by the cooling device 135 . Therefore, the second cooling unit 195 has a configuration in which the heat transfer liquid 110 flowing therein and the cooling device 135 can exchange heat, and the cooling device 135 allows the heat transfer liquid 110 flowing through the second cooling unit 195 to be heated. is cooled. A pump 150 is arranged in the second cooling channel 190, and the heat transfer fluid 110 flows into the second cooling flow channel 190 from a suction port arranged in the heat transfer fluid 110 of the mixing tank 125, and then flows into the second cooling flow channel 190. Via the portion 195 , it flows out from an outlet arranged in the heat transfer liquid 110 of the heat storage tank 105 . A discharge port of the heat transfer liquid 110 in the second cooling flow path 190 is arranged in the heat transfer liquid 110 stored in the heat storage tank 105 at a position opposite to the mixing tank 125 with respect to the cold storage unit 115 . .

Next, the internal structure of the heat storage tank 105 will be described with reference to FIG. The heat storage tank 105 stores the heat medium liquid 110 and immerses a cold storage unit 115 containing a cold storage material 120 (see FIG. 3). A plurality of cool storage units 115 are stacked on a mount 116 . The pedestal 116 forms a space for the heat transfer liquid 110 to flow under the lowest cold storage unit 115 .

The upstream partition plate 117 and the downstream partition plate 118 form a channel for flowing the heat medium liquid 110 to the cold storage unit 115 . The upper end of the upstream partition plate 117 is arranged higher than the liquid level of the heat transfer liquid 110 in order to prevent the heat transfer liquid 110 from short-circuiting without passing through the cold storage unit 115 . The downstream partition plate 118 is arranged at a position where its lower end contacts the bottom surface of the heat storage tank 105 so that the heat transfer fluid 110 flows into the cold storage unit 115 . The upper end of the downstream partition plate 118 is positioned lower than the liquid surface of the heat transfer medium 110 so that the heat transfer liquid 110 flowing out of the cold storage unit 115 flows toward the mixing tank 125 .

The partition wall 130 has its upper end positioned lower than the liquid surface of the heat transfer medium 110 so that the heat transfer medium 110 flowing out of the cold storage unit 115 can flow into the mixing tank 125 .

Next, the internal structure of the cold storage unit 115 will be described with reference to FIG. The cold storage unit 115 is configured by arranging a plurality of cold storage materials 120 in a cold storage material storage box 121 with a gap through which the heat medium liquid 110 flows. As described above, the cold storage material 120 is enclosed in a rectangular parallelepiped aluminum laminate pack, a resin case, or the like. In this specification, the cold storage material 120 indicates not only the cold storage material itself, but also a set in which the cold storage material is enclosed in an aluminum pack or an aluminum case for convenience. The cold storage material storage box 121 includes lids 122 with openings for the circulation of the heat transfer liquid 110 on the ceiling and bottom. Therefore, the heat transfer fluid 110 can easily flow into the cold storage unit 115 . Therefore, heat exchange can be performed between the cold storage material 120 and the heat transfer liquid 110 flowing around it.

[1-2. motion]
The operation of the cooling system 100 configured as described above will be described below.

In order for the cooling device 135 to operate at a high coefficient of performance, the flow rate and temperature of the heat transfer fluid 110 are constrained. Specifically, it is effective to operate with a constant cooling capacity (the flow rate and temperature difference of the heat transfer fluid 110 are constant).

The operation of the cooling system 100 will be described with reference to FIGS. 1 to 3. FIG. First, the operation of simultaneously performing the operation of storing cold in the cold storage material 120 of the cold storage unit 115 arranged in the heat storage tank 105 and the operation of cooling the object to be cooled 155 will be described.

The operation of storing cold in the cold storage material 120 is performed as follows.

First, the heat transfer liquid 110 stored in the mixing tank 125 flows into the second cooling flow path 190 and is cooled by the cooling device 135 in the second cooling section 195 . Here, the heat transfer liquid 110 is cooled to a temperature higher than the melting point of the heat transfer liquid 110 and lower than the melting point of the cold storage material 120 .

The cooled heat transfer liquid 110 flows out from the second cooling channel 190 to the heat storage tank 105 . Here, the heat medium liquid 110 that has flowed out to the heat storage tank 105 is mixed with the heat medium liquid 110 that has been stored in the heat storage tank 105 .

The heat transfer liquid 110 mixed in the heat storage tank 105 flows into the space under the lowermost cold storage unit 115 formed by providing the frame 116, and then flows from the bottom to the top of the plurality of cold storage units. Pass 115. In each cold storage unit 115, the heat transfer liquid 110 passes through the lid 122 with an opening at the bottom, flows inside, flows around the cold storage materials 120 arranged in a cold storage material storage box 121, and reaches the ceiling. It flows out through the lid 122 with an opening. At this time, heat exchange takes place between the heat medium liquid 110 and the cold storage material 120 . As a result of this heat exchange, the temperature of the cold storage material 120 drops below the melting point in order from the cold storage unit 115 on the upstream side, that is, on the lower side, and in the cold storage unit 115 on the downstream side, that is, on the upper side, and the phase changes from liquid to solid. be done.

After passing through the plurality of cold storage units 115 , the heat transfer liquid 110 flows over the upper end of the partition wall 130 and into the mixing tank 125 .

The operation for cooling the object to be cooled 155 is performed as follows.

First, the heat transfer liquid 110 stored in the mixing tank 125 flows from the suction port 165 into the first cooling flow path 180 and cools the object 155 to be cooled in the first cooling section 185 . Here, the heat transfer liquid 110 becomes hot by cooling the object 155 to be cooled.

The heat transfer liquid 110 that has reached a high temperature flows through the first cooling flow path 180 and flows out from the discharge port 170 into the mixing tank 125 . The heat transfer liquid 110 that has flowed out to the mixing tank 125 is mixed with the heat transfer liquid 110 that has been stored in the mixing tank 125 . The heat transfer liquid 110 stored in the mixing tank 125 is mixed with the heat transfer liquid 110 that has flowed over the partition wall 130 into the mixing tank 125 and has been stored in the cold storage material in the heat storage tank 105 .

Here, since the first cooling flow path 180 and the second cooling flow path 190 are independent of each other, the cooling operation of the object to be cooled and the cold storage operation of the cold storage material 120 can be performed at the same time. Furthermore, in these two flow paths, both operations can be performed continuously without changing the flow path such as switching the flow direction of the heat transfer liquid 110 .

In addition, in the mixing tank 125 , the heat transfer liquid 110 after cold storage in the cold storage material 120 in the heat storage tank 105 and the heat transfer liquid 110 heated to a high temperature by cooling the object 155 to be cooled are mixed. The temperature of the heat transfer liquid 110 that flows into the second cooling flow path 190 and is sent to the cooling device 135 is higher than that of the heat transfer liquid 110 after cold storage of the cold storage material 120 in the heat storage tank 105 . Further, the temperature of the heat transfer liquid 110 that flows from the mixing tank 125 into the first cooling flow path 180 and is sent toward the object to be cooled 155 becomes lower than the temperature of the heat transfer liquid 110 that cools the object to be cooled 155 and reaches a high temperature. . Therefore, the heat transfer fluid 110 in the mixing tank 125 descends with a higher density than when it is discharged from the discharge port 170 of the first cooling channel 180 . Since the suction port 165 of the first cooling flow path 180 is provided at a position lower than the discharge port 170 , the heat transfer liquid 110 that has increased in density and descends in the mixing tank 125 flows through the suction port 165 again into the first It is sucked into the cooling channel 180 and sent toward the object to be cooled 155 .

Next, a description will be given of the operation of releasing cold from the cold storage material 120 of the cold storage unit 115 arranged in the heat storage tank 105 and cooling the object 155 to be cooled at the same time.

The operation in which cooling is released from the cold storage material 120 is performed as follows.

First, the heat transfer liquid 110 stored in the mixing tank 125 flows into the second cooling flow path 190 and is cooled by the cooling device 135 in the second cooling section 195 . Here, the heat transfer liquid 110 is cooled to a temperature equal to or higher than the melting point of the cold storage material 120 and lower than the preset temperature of the object to be cooled 155 .

The cooled heat transfer liquid 110 flows out from the second cooling channel 190 to the heat storage tank 105 . Here, the heat medium liquid 110 that has flowed out to the heat storage tank 105 is mixed with the heat medium liquid 110 that has been stored in the heat storage tank 105 .

The heat transfer liquid 110 mixed in the heat storage tank 105 flows into the space under the lowermost cold storage unit 115 formed by providing the frame 116, and then flows from the bottom to the top of the plurality of cold storage units. Pass 115. In each cold storage unit 115, the heat transfer liquid 110 passes through the lid 122 with an opening at the bottom, flows inside, flows around the cold storage materials 120 arranged in a cold storage material storage box 121, and reaches the ceiling. It flows out through the lid 122 with an opening. At this time, heat exchange takes place between the heat medium liquid 110 and the cold storage material 120 . As a result of this heat exchange, the temperature of the cold storage material 120 rises to a temperature equal to or higher than the melting point in the cold storage unit 115 on the upstream side, that is, on the lower side, and in the cold storage unit 115 on the downstream side, that is, on the upper side, and the phase changes from solid to liquid. be cooled.

After passing through the plurality of cold storage units 115 , the heat transfer liquid 110 flows over the upper end of the partition wall 130 and into the mixing tank 125 .

The operation for cooling the object to be cooled 155 is performed as follows.

First, the heat transfer liquid 110 stored in the mixing tank 125 flows from the suction port 165 into the first cooling flow path 180 and cools the object 155 to be cooled in the first cooling section 185 . Here, the heat transfer liquid 110 becomes hot by cooling the object 155 to be cooled.

The heat transfer liquid 110 that has reached a high temperature flows through the first cooling flow path 180 and flows out from the discharge port 170 into the mixing tank 125 . The heat transfer liquid 110 that has flowed out to the mixing tank 125 is mixed with the heat transfer liquid 110 that has been stored in the mixing tank 125 . The heat transfer liquid 110 stored in the mixing tank 125 is also mixed with the heat transfer liquid 110 that has flowed over the partition wall 130 into the mixing tank 125 after cooling the cold storage material in the heat storage tank 105 . .

Here, since the first cooling flow path 180 and the second cooling flow path 190 are independent of each other, the cooling operation of the object to be cooled and the cooling operation of the cold storage material 120 can be performed at the same time. Furthermore, in these two flow paths, both operations can be performed continuously without changing the flow path such as switching the flow direction of the heat transfer liquid 110 .

In addition, in the mixing tank 125 , the heat transfer liquid 110 after cold storage in the cold storage material 120 in the heat storage tank 105 and the heat transfer liquid 110 heated to a high temperature by cooling the object 155 to be cooled are mixed. The temperature of the heat transfer liquid 110 flowing into the second cooling passage 190 and sent toward the cooling device 135 is higher than the temperature of the heat transfer liquid 110 after the cold storage material 120 is allowed to cool in the heat storage tank 105 . Further, the temperature of the heat transfer liquid 110 that flows from the mixing tank 125 into the first cooling flow path 180 and is sent toward the object to be cooled 155 becomes lower than the temperature of the heat transfer liquid 110 that cools the object to be cooled 155 and reaches a high temperature. . Therefore, the heat transfer fluid 110 in the mixing tank 125 descends with a higher density than when it is discharged from the discharge port 170 of the first cooling channel 180 . Since the suction port 165 of the first cooling flow path 180 is provided at a position lower than the discharge port 170 , the heat transfer liquid 110 that has increased in density and descends in the mixing tank 125 flows through the suction port 165 again into the first It is sucked into the cooling channel 180 and sent toward the object to be cooled 155 .

[1-3. effects, etc.]
As described above, in the present embodiment, cooling system 100 includes heat storage tank 105, cold storage unit 115, mixing tank 125, cooling device 135, first cooling channel 180, second cooling channel 190, And prepare. The heat storage tank 105 stores the heat medium liquid 110 and has a cold storage unit 115 immersed therein. The cold storage unit 115 accommodates a cold storage material 120 . The melting point of the cold storage material 120 is higher than the melting point of the heat transfer liquid 110 and lower than the preset temperature of the object to be cooled 155 . The mixing tank 125 stores the heat transfer liquid 110 and communicates with the heat storage tank 105 . The first cooling flow path 180 has a configuration in which the heat transfer liquid 110 flows from the mixing tank 125 and flows out to the mixing tank 125 via the first cooling section 185 for cooling the object 155 to be cooled. The second cooling flow path 190 has a configuration in which the heat transfer liquid 110 flows from the mixing tank 125 and flows out to the heat storage tank 105 via the second cooling section 195 cooled by the cooling device 135 .

As a result, in the mixing tank 125, by mixing the heat transfer liquid 110 that has been stored or cooled in the cold storage material 120 in the heat storage tank 105 and the heat transfer liquid 110 that has been heated to a high temperature by cooling the object 155 to be cooled, The heat transfer liquid 110 having a temperature higher than that of the heat transfer liquid 110 that has been stored or cooled in the cold storage material 120 in the heat storage tank 105 flows from the mixing tank 125 into the second cooling channel 190 and is sent to the cooling device 135. be able to.

Also, in the second half of the cold storage or cold discharge operation, when the temperature difference between the temperature of the heat transfer liquid 110 flowing out of the cold storage unit 115 and the melting point of the cold storage material 120 becomes small, A large temperature difference can be maintained between the temperature of the heat transfer fluid 110 on the outlet 145 side and the temperature of the heat transfer fluid 110 on the inlet 140 side of the cooling device 135 .

Also, the flow rate of the heat transfer fluid 110 required to obtain the same amount of heat exchange in the cooling device 135 can be kept small.

Furthermore, the heat transfer liquid 110 having a lower temperature than the heat transfer liquid 110 heated to a high temperature by cooling the cooling target 155 can be sent to the cooling target 155 . Therefore, the power required for transporting the heat transfer fluid 110 can be kept small, and the energy required for cooling the heat transfer fluid can be reduced. Also, in the latter half of the cold storage or cool discharge operation, the coefficient of performance of the cooling device 135 can be kept high by operating while maintaining the cooling capacity.

Furthermore, since the first cooling channel 180 and the second cooling channel 190 are independent of each other, the object to be cooled can be cooled without changing the channel such as switching the flow direction of the heat transfer liquid 110 . The cooling operation of 155 and the cool storage or cold discharge operation of the cold storage material 120 can be performed at the same time, and the cool storage operation and cool discharge operation of the cold storage material 120 are switched while performing the cooling operation of the cooling object 155. be able to.

In this way, while reducing the energy required for cooling the heat medium liquid compared to the conventional technique, the cooling device 135 is operated while the cooling device 135 is operated without changing the flow path of the heat medium liquid for cooling the object to be cooled. An operation in which the object to be cooled is cooled at the same time and an operation in which the cold storage material is cooled and the object to be cooled 155 is cooled at the same time can be switched.

Further, as in the present embodiment, the cooling system 100 includes the suction port 165 and the discharge port 170 in the first cooling flow path 180, and the heat transfer liquid 110 is mixed to cool the object 155 to be cooled. The inlet 165 from the bath 125 may be located lower than the outlet 170 through which the heat transfer liquid 110 cools the cooling object 155 and flows out to the mixing bath 125 .

As a result, the heat transfer liquid 110 that has cooled the cooling object 155 and has reached a high temperature is discharged into the mixing tank 125. Mix with 110. The temperature of the heat transfer fluid 110 drops, the density increases and it drops. Therefore, the heat transfer liquid 110 is sucked into the first cooling flow path 180 to cool the cooling target 155 and then discharged, thereby ensuring the temperature difference of the heat transfer liquid 110 between the suction port 165 and the discharge port 170. , the cooling operation of the object to be cooled 155 can be reliably performed.

As described above, while reducing the energy required for cooling the heat medium liquid 110, the cooling device 135 is operated without changing the flow path of the heat medium liquid 110 for cooling the object 155 to be cooled. and the cooling object 155 at the same time, and the operation of cooling the cold storage material 120 and cooling the cooling object 155 at the same time can be reliably performed while switching.

(Embodiment 2)
Embodiment 2 will be described below with reference to FIGS. 4 to 6. FIG.

[2-1. composition]
The cooling system 200 according to the second embodiment includes at least a heat medium liquid tank 205, a first bypass flow path 215, a first flow regulator 220, a temperature detection means 225, and a second bypass flow path. 230 and a second flow regulator 235, which is different from the cooling system 100 according to the first embodiment. In the following, descriptions of components having the same configuration and arrangement as those of the components described in the first embodiment may be omitted.

The heat transfer liquid tank 205 has a mixing tank 125 and a heat storage tank 105 , and the mixing tank 125 has a first storage tank 240 and a second storage tank 245 . In the heat medium liquid tank 205, the second storage tank 245, the first storage tank 240, and the heat storage tank 105 are arranged in this order. A partition wall 131 is arranged between the second storage tank 245 and the first storage tank 240 so as to allow the heat transfer liquid 110 to flow therethrough. Between the first storage tank 240 and the heat storage tank 105, a partition wall 130 is arranged so that the heat transfer liquid 110 can flow therethrough.

The first bypass channel 215 is located at a first position 142 between the first storage tank 240 and the cold storage unit 115 in the heat storage tank 105 and below the liquid level of the heat transfer fluid 110 and at a second cooling channel 190 . The heat transfer liquid 110 flows by connecting the position of the liquid surface of the heat transfer liquid 110 in the first storage tank 240 and the second position 144 between the second cooling section 195 .

The temperature detection means 225 is a thermistor, and detects the temperature of the heat transfer fluid 110 stored in the heat storage tank 105 at a position opposite to the first storage tank 240 with respect to the cold storage unit 115 . Note that the temperature detection means 225 is not limited to the thermistor, and may be anything that can detect temperature using a thermocouple, a temperature camera, or the like.

The first flow rate regulator 220 is an electromagnetic valve, is arranged in the first bypass flow path 215, and according to the temperature detected by the temperature detection means 225, the heat medium liquid flowing through the first bypass flow path 215 110 flow rate control.

The second bypass passage 230 is located at a third location 146 between the second location 144 and the second cooling section 195 in the second cooling passage 190 and the second cooling section 195 in the second cooling passage 190 . and a fourth position 148 between the level of the heat transfer liquid 110 in the heat storage tank 105 and the heat transfer liquid 110 flows. That is, the second bypass flow path 230 connects the inlet 140 side of the cooling device 135 and the outlet 145 side of the cooling device 135 .

The second flow rate regulator 235 is an electromagnetic valve, is arranged in the second bypass flow path 230, and adjusts the temperature detected by the temperature detection means 225 to the heat medium liquid flowing through the second bypass flow path 230. 110 flow rate control.

[2-2. motion]
The operation of the cooling system 200 configured as described above will be described below.

In order for the cooling device 135 to operate at a high coefficient of performance, the flow rate and temperature of the heat transfer fluid 110 are constrained. Specifically, it is effective to operate with a constant cooling capacity (the flow rate and temperature difference of the heat transfer fluid 110 are constant).

The operation of the cooling system 200 will be described with reference to FIGS. 4 and 5. FIG. First, the operation of simultaneously performing the operation of storing cold in the cold storage material 120 of the cold storage unit 115 arranged in the heat storage tank 105 and the operation of cooling the object to be cooled 155 will be described. In this mode of operation, the second flow regulator 235 is closed to prevent the heat transfer liquid 110 from flowing through the second bypass flow path 230 . The cooling device 135 is in constant operation with a high coefficient of performance.

The operation of storing cold in the cold storage material 120 is performed as follows.

First, the heat transfer liquid 110 that has flowed from the first storage tank 240 into the second cooling channel 190 and the heat transfer liquid 110 that has flowed from the heat storage tank 105 into the first bypass flow channel 215 are separated at the second position 144 . The mixed heat transfer liquid 110 is cooled by the cooling device 135 in the second cooling section 195 . Here, the heat transfer liquid 110 is cooled to a temperature higher than the melting point of the heat transfer liquid 110 and lower than the melting point of the cold storage material 120 .

The cooled heat transfer liquid 110 flows out from the second cooling channel 190 to the heat storage tank 105 . Here, the heat medium liquid 110 that has flowed out to the heat storage tank 105 is mixed with the heat medium liquid 110 that has been stored in the heat storage tank 105 .

The heat transfer liquid 110 mixed in the heat storage tank 105 flows into the space under the lowermost cold storage unit 115 formed by providing the frame 116, and then flows from the bottom to the top of the plurality of cold storage units. Pass 115. In each cold storage unit 115, the heat transfer liquid 110 passes through the lid 122 with an opening at the bottom, flows inside, flows around the cold storage materials 120 arranged in a cold storage material storage box 121, and reaches the ceiling. It flows out through the lid 122 with an opening. At this time, heat exchange takes place between the heat medium liquid 110 and the cold storage material 120 . As a result of this heat exchange, the temperature of the cold storage material 120 drops below the melting point in order from the cold storage unit 115 on the upstream side, that is, on the lower side, and in the cold storage unit 115 on the downstream side, that is, on the upper side, and the phase changes from liquid to solid. be done.

After passing through the plurality of cold storage units 115 , the heat transfer liquid 110 flows over the upper end of the partition wall 130 and into the first storage tank 240 .

The operation for cooling the object to be cooled 155 is performed as follows.

First, the heat transfer liquid 110 stored in the first storage tank 240 flows into the first cooling flow path 180 from the suction port 165 and cools the object 155 to be cooled in the first cooling section 185 . Here, the heat transfer liquid 110 becomes hot by cooling the object 155 to be cooled.

The heat transfer liquid 110 that has reached a high temperature flows through the first cooling flow path 180 and flows out from the discharge port 170 to the second storage tank 245 . The heat transfer liquid 110 that has flowed out to the second storage tank 245 climbs over the upper end of the partition wall 131 and flows into the first storage tank 240 . Thus, once passing through the second storage tank 245, the temperature fluctuation of the heat transfer fluid 110 sent to the first storage tank 240 is reduced. Moreover, the heat transfer liquid 110 that has passed over the upper end of the partition wall 131 is mixed with the heat transfer liquid 110 that has been stored in the first storage tank 240 . In the heat medium liquid 110 stored in the first storage tank 240 , the heat medium that has flowed over the upper end portion of the partition wall 130 and flowed into the first storage tank 240 has been stored in the cold storage material 120 in the heat storage tank 105 . Liquid 110 is also mixed.

Here, since the first cooling flow path 180 and the second cooling flow path 190 are independent of each other, the cooling operation of the object to be cooled and the cold storage operation of the cold storage material 120 can be performed at the same time. Further, in the first cooling flow path 180, continuous operation can be performed without changing the flow path such as switching the flow direction of the heat transfer liquid 110. FIG.

In addition, the heat transfer liquid 110 that has cooled the object 155 to be cooled and has reached a high temperature flows from the second storage tank 245 over the upper end of the partition wall 131 and flows into the first storage tank 240 . The heat transfer liquid 110 after being heated flows from the heat storage tank 105 over the upper end of the partition wall 130 into the first storage tank 240 and is mixed in the first storage tank 240 . Here, although the temperature of the heat transfer liquid 110 stored in the first storage tank 240 is higher than the temperature of the heat transfer liquid 110 after the cold storage material 120 is stored in the heat storage tank 105, the object 155 to be cooled is cooled to a high temperature. , and is lower than the heat transfer liquid 110 discharged from the discharge port 170 . As a result, the temperature of the heat transfer liquid 110 that has flowed from the second storage tank 245 into the first storage tank 240 decreases, the density increases, and the temperature drops, so that mixing is promoted by convection. Therefore, by sucking the heat transfer liquid 110 from the suction port 165 of the first cooling flow path 180 and sending it toward the object to be cooled 155, the temperature difference of the heat transfer liquid 110 between the suction port 165 and the discharge port 170 is reduced. Therefore, the cooling operation of the object 155 to be cooled can be reliably performed.

Here, when the temperature of the object to be cooled 155 rises, the temperature of the heat transfer liquid 110 flowing through the first cooling channel 180 and flowing out from the discharge port 170 into the second storage tank 245 also rises, and flows into the first storage tank 240. The temperature of heat transfer fluid 110 also rises. As a result, the temperature of the heat transfer fluid stored in the first storage tank 240 also rises. In this case, the temperature of the heat transfer liquid 110 that flows from the first storage tank 240 into the second cooling channel 190 and is sent to the cooling device 135 also rises. The temperature of the liquid medium 110 also rises, and the temperature of the heat medium liquid 110 detected by the temperature detecting means 225 also rises.

Therefore, according to the detected temperature, the flow rate of the heat transfer liquid 110 flowing through the first bypass flow path 215 is controlled by the first flow rate regulator 220 to increase. By doing so, more of the heat transfer liquid 110 having a temperature lower than the temperature of the heat transfer liquid 110 flowing into the second cooling channel 190 from the first storage tank 240 is sent to the cooling device 135 . Here, when a constant operation is performed with a cooling capacity having a high coefficient of performance, the temperature of the heat transfer liquid 110 cooled by the cooling device 135 in the second cooling section 195 in the second cooling passage 190, and Similarly, the temperature of the heat transfer liquid 110 flowing out from the second cooling channel 190 to the heat storage tank 105 can be lowered. In this manner, the temperature of the heat transfer liquid 110 before flowing into the cold storage unit 115 can be controlled to be higher than the melting point of the heat transfer liquid 110 and below the melting point of the cold storage material 120 .

Next, the operation of the cooling system 200 will be described with reference to FIGS. 4 and 6. FIG. First, the operation of releasing cold from the cold storage material 120 of the cold storage unit 115 arranged in the heat storage tank 105 and cooling the cooling target 155 at the same time will be described. In this mode of operation, the first flow regulator 220 is closed to prevent the heat transfer liquid 110 from flowing through the first bypass flow path 215 . The cooling device 135 is in constant operation with a high coefficient of performance.

The operation in which cooling is released from the cold storage material 120 is performed as follows.

First, the heat transfer liquid 110 flowing into the second cooling channel 190 from the first storage tank 240 branches at the third position 146 and is sent to the cooling device 135 and the second bypass channel 230 . Then, the heat transfer liquid 110 cooled by the cooling device 135 in the second cooling portion 195 in the second cooling flow path 190 and the uncooled heat transfer liquid 110 flowing through the second bypass flow path 230 are Since they join and mix at the position 148 of 4, the temperature of the heat transfer liquid 110 flowing out from the second cooling flow path 190 to the heat storage tank 105 can be made equal to or higher than the melting point of the cold storage material 120 .

The heat transfer liquid 110 that has joined and mixed at the fourth position 148 flows out from the second cooling flow path 190 to the heat storage tank 105 . Here, the heat transfer liquid 110 that has flowed out to the heat storage tank 105 is mixed with the heat transfer liquid 110 that has been stored in the heat storage tank 105 .

The heat transfer liquid 110 mixed in the heat storage tank 105 passes through the plurality of cold storage units 115 from the bottom to the top. In each cold storage unit 115 , the heat transfer liquid 110 flows around a plurality of cold storage materials 120 arranged in a cold storage material housing box 121 . At this time, heat exchange takes place between the heat medium liquid 110 and the cold storage material 120 . As a result of this heat exchange, the temperature of the cold storage material 120 rises to a temperature equal to or higher than the melting point in the cold storage unit 115 on the upstream side, that is, on the lower side, and in the cold storage unit 115 on the downstream side, that is, on the upper side, and the phase changes from solid to liquid. be cooled.

After passing through the plurality of cold storage units 115 , the heat transfer liquid 110 flows over the upper end of the partition wall 130 and into the first storage tank 240 .

The operation for cooling the object to be cooled 155 is performed as follows.

First, the heat transfer liquid 110 stored in the first storage tank 240 flows into the first cooling flow path 180 from the suction port 165 and cools the object 155 to be cooled in the first cooling section 185 . Here, the heat transfer liquid 110 becomes hot by cooling the object 155 to be cooled.

The heat transfer liquid 110 that has reached a high temperature flows through the first cooling flow path 180 and flows out from the discharge port 170 to the second storage tank 245 . The heat transfer liquid 110 that has flowed out to the second storage tank 245 climbs over the upper end of the partition wall 131 and flows into the first storage tank 240 . Thus, once passing through the second storage tank 245, the temperature fluctuation of the heat transfer fluid 110 sent to the first storage tank 240 is reduced. Moreover, the heat transfer liquid 110 that has passed over the upper end of the partition wall 131 is mixed with the heat transfer liquid 110 that has been stored in the first storage tank 240 . In the heat transfer liquid 110 stored in the first storage tank 240 , the heat that has flowed over the upper end of the partition wall 130 into the first storage tank 240 and has been cooled by the cold storage material 120 in the heat storage tank 105 A medium liquid 110 is also mixed.

Here, since the first cooling flow path 180 and the second cooling flow path 190 are independent of each other, the cooling operation of the object to be cooled and the cooling operation of the cold storage material 120 can be performed at the same time. Further, in the first cooling flow path 180, continuous operation can be performed without changing the flow path such as switching the flow direction of the heat transfer liquid 110. FIG.

In addition, the heat transfer liquid 110 that has cooled the cooling object 155 and has reached a high temperature flows from the second storage tank 245 over the upper end of the partition wall 131 and flows into the first storage tank 240 , and is discharged to the cold storage material 120 in the heat storage tank 105 . After being cooled, the heat transfer liquid 110 flows from the heat storage tank 105 over the upper end of the partition wall 130 into the first storage tank 240 and is mixed in the first storage tank 240 . Here, the temperature of the heat transfer liquid 110 stored in the first storage tank 240 is higher than the temperature of the heat transfer liquid 110 after the cold storage material 120 is allowed to cool in the heat storage tank 105, but the cooling object 155 is cooled. The temperature becomes higher than that of the heat transfer liquid 110 discharged from the discharge port 170 . As a result, the temperature of the heat transfer liquid 110 that has flowed from the second storage tank 245 into the first storage tank 240 decreases, the density increases, and the temperature drops, so that mixing is promoted by convection. Therefore, by sucking the heat transfer liquid 110 from the suction port 165 of the first cooling flow path 180 and sending it toward the object to be cooled 155, the temperature difference of the heat transfer liquid 110 between the suction port 165 and the discharge port 170 is reduced. Therefore, the cooling operation of the object 155 to be cooled can be reliably performed.

Here, when the temperature of the object to be cooled 155 drops, the temperature of the heat transfer liquid 110 flowing through the first cooling channel 180 and flowing out from the outlet 170 into the second storage tank 245 also drops, and flows into the first storage tank 240. The temperature of heat transfer fluid 110 also decreases. As a result, the temperature of the heat transfer fluid stored in the first storage tank 240 is also lowered. In this case, the temperature of the heat transfer liquid 110 flowing from the first storage tank 240 into the second cooling channel 190 and sent to the cooling device 135 also decreases, so the heat flowing out from the second cooling channel 190 to the heat storage tank 105 The temperature of the liquid medium 110 also drops, and the temperature of the heat medium liquid 110 detected by the temperature detection means 225 also drops.

Therefore, according to the detected temperature, the flow rate of the heat transfer liquid 110 flowing through the second bypass flow path 230 is controlled by the second flow rate regulator 235 to increase. By doing so, the heat transfer liquid 110 having a temperature higher than the temperature of the heat transfer liquid 110 when it leaves the cooling device 135 can flow out from the second cooling flow path 190 to the heat storage tank 105 . In this way, the temperature of the heat transfer liquid 110 before flowing into the cold storage unit 115 can be controlled to a temperature equal to or higher than the melting point of the cold storage material 120 and lower than the set temperature of the cooling target 155 .

[2-3. effects, etc.]
As described above, when constant operation is performed with a high coefficient of performance in the cooling device 135, the temperature of the object to be cooled 155 rises, and the temperature of the heat transfer liquid 110 sent from the first storage tank 240 to the cooling device 135 increases. When this happens, the temperature of the heat transfer fluid 110 exiting the cooling device 135 in the second cooling flow path 190 also rises, and depending on the conditions, it may exceed the melting point of the cold storage material 120 .

In contrast, in the present embodiment, cooling system 200 may include first bypass flow path 215 , first flow regulator 220 , and temperature detection means 225 . A first bypass flow path 215 connects a first location 142 in the thermal storage tank 105 and a second location 144 in the second cooling flow path 190 through which the heat transfer fluid 110 flows. The temperature detection means 225 detects the temperature of the heat transfer liquid 110 stored in the heat storage tank 105 at a position opposite to the first storage tank 240 with respect to the cold storage unit 115 . The first flow rate regulator 220 controls the flow rate of the heat transfer liquid 110 flowing through the first bypass flow path 215 according to the temperature detected by the temperature detection means 225 .

As a result, the heat transfer liquid 110 that has flowed from the first storage tank 240 into the second cooling channel 190 and the heat transfer liquid 110 that has flowed from the heat storage tank 105 into the first bypass flow channel 215 are moved to the second position 144 . By mixing with , the heat transfer liquid 110 having a temperature lower than that of the heat transfer liquid 110 flowing into the second cooling channel 190 from the first storage tank 240 can be sent to the cooling device 135 .

Here, when a constant operation is performed with a high coefficient of performance, the temperature of the heat transfer liquid 110 exiting the cooling device 135 in the second cooling passage 190 and the temperature of the heat transfer liquid 110 flowing out from the second cooling passage 190 to the heat storage tank 105 The temperature of the heat transfer fluid 110 to be heated can be similarly lowered.

Furthermore, by controlling the flow rate of the heat transfer liquid 110 flowing through the first bypass flow path 215 according to the temperature detected by the temperature detection means 225, the heat flowing out from the second cooling flow path 190 to the heat storage tank 105 is controlled. By lowering the temperature of the liquid medium 110, the temperature of the heat medium liquid 110 before flowing into the cold storage unit 115 in the heat storage tank 105 can be made higher than the melting point of the heat medium liquid 110 and lower than the melting point of the cold storage material 120. .

Therefore, even when the temperature of the object to be cooled 155 rises when constant operation is performed with a high coefficient of performance in the cooling device 135, the flow path of the heat transfer liquid 110 for cooling the object to be cooled 155 does not need to be changed. , the cold storage operation of the cold storage material 120 and the cooling operation of the object to be cooled 155 can be performed simultaneously while operating the cooling device 135 .

Further, when constant operation is performed with a high coefficient of performance in the cooling device 135, the temperature of the object to be cooled 155 decreases, and when the temperature of the heat transfer liquid 110 sent from the first storage tank 240 to the cooling device 135 decreases, , the temperature of the heat transfer fluid 110 exiting the cooling device 135 in the second cooling flow path 190 is also lowered, and depending on the conditions, it may be lower than the melting point of the cold storage material 120 .

In contrast, the cooling system 200 may include the second bypass flow path 230 and the second flow regulator 235 as in the present embodiment. A second bypass flow path 230 connects a third location 146 in the second cooling flow path 190 and a fourth location 148 in the second cooling flow path 190 for flow of the heat transfer fluid 110 . The second flow rate regulator 235 controls the flow rate of the heat transfer liquid 110 flowing through the second bypass flow path 230 according to the temperature detected by the temperature detection means 225 .

As a result, the heat transfer liquid 110 cooled by the cooling device 135 and the heat transfer liquid 110 that has not been cooled and flowed through the second bypass flow path 230 merge and mix at the fourth position 148, so that cooling Heat transfer fluid 110 at a higher temperature than the heat transfer fluid 110 as it leaves device 135 can be delivered to thermal storage tank 105 .

Furthermore, by controlling the flow rate of the heat transfer liquid 110 flowing through the second bypass flow path 230 according to the temperature detected by the temperature detection means 225, the heat flowing into the heat storage tank 105 from the second cooling flow path 190 is reduced. By increasing the temperature of the liquid medium 110, the temperature of the heat medium liquid 110 before flowing into the cold storage unit 115 in the heat storage tank 105 can be made higher than the melting point of the cold storage material 120 and lower than the set temperature of the object to be cooled 155. .

Therefore, in the cooling device 135, when constant operation is performed with a high coefficient of performance, even when the temperature of the object to be cooled 155 drops, the flow path of the heat transfer liquid 110 for cooling the object to be cooled 155 does not need to be changed. , while operating the cooling device 135, the cooling operation of the cold storage material 120 and the cooling operation of the object to be cooled 155 can be performed at the same time.

Further, when the cooling device 135 was operated at a high coefficient of performance, the temperature of the object to be cooled 155 fluctuated greatly, and the temperature of the heat transfer liquid 110 sent from the first storage tank 240 to the cooling device 135 also fluctuated greatly. At times, the temperature of the heat transfer fluid 110 exiting the cooling device 135 in the second cooling passage 190 also fluctuates significantly. Depending on the conditions, the melting point of the cold storage material 120 may be exceeded during cool storage operation, or the melting point of cold storage material 120 may be decreased during cool discharge operation.

In contrast, the cooling system 200 may include the second storage tank 245 as in the present embodiment. The second storage tank 245 communicates with the first storage tank 240 so that the heat transfer liquid 110 can flow therethrough. 2, the outlet 170 is arranged in the reservoir 245 .

As a result, the heat transfer liquid 110, which has cooled the cooling object 155 and has reached a high temperature, flows out from the first cooling channel 180 into the second storage tank 245, is temporarily stored in the second storage tank 245, and is then stored in the first storage tank. By flowing into the tank 240, fluctuations in the temperature of the heat transfer liquid 110 flowing into the first storage tank 240 are reduced. In addition, fluctuations in the temperature of the heat transfer liquid 110 flowing from the first storage tank 240 into the second cooling flow path 190 and sent to the cooling device 135 can be reduced. Here, when constant operation is performed with a high coefficient of performance, the temperature of the heat transfer liquid 110 cooled by the cooling device 135 in the second cooling unit 195 in the second cooling flow path 190 and the temperature of the second cooling flow path Fluctuations in the temperature of the heat transfer fluid 110 that has flowed out of the heat storage tank 105 from 190 can also be reduced.

Therefore, even when the temperature of the object to be cooled 155 fluctuates greatly when constant operation is performed with a high coefficient of performance in the cooling device 135, the single cooling device 135 can store cold in the cold storage material 120 and cool the object to be cooled 155. , and an operation in which cooling of the cold storage material 120 and cooling of the object to be cooled 155 are performed at the same time can be switched.

Furthermore, cooling system 200 may include partition wall 130 , partition wall 131 , and heat medium liquid tank 205 as in the present embodiment. Inside the heat medium liquid tank 205, the second storage tank 245, the first storage tank 240, and the heat storage tank 105 are arranged in this order. The partition wall 131 that partitions the heat transfer liquid 110 so as to be able to flow is disposed between the second storage tank 245 and the first storage tank 240, and the partition wall 130 that allows the heat transfer liquid 110 to flow is disposed between the first storage tank 245 and the first storage tank 240. It is arranged between the tank 240 and the heat storage tank 105 .

As a result, the second storage tank 245, the first storage tank 240, and the heat storage tank 105 are arranged in descending order of temperature. The temperature of the heat transfer liquid 110 before entering the cold storage unit 115 can be kept low and below the melting point of the cold storage material 120 .

Therefore, while reducing the energy required for cooling the heat transfer liquid 110, the cold storage material 120 is stored and cooled while the cooling device 135 is operated without changing the flow path of the heat transfer liquid 110 for cooling the object 155 to be cooled. An operation in which cooling of the object 155 is simultaneously performed and an operation in which cooling of the cold storage material 120 and cooling of the object to be cooled 155 are simultaneously performed can be switched.

(Other embodiments)
As described above, Embodiments 1 and 2 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments with modifications, replacements, additions, omissions, and the like. Also, it is possible to combine the constituent elements described in the first and second embodiments to form a new embodiment.

Therefore, other embodiments will be exemplified below.

In Embodiments 1 and 2, water has been described as an example of heat transfer fluid 110 . The heat transfer liquid 110 may have a melting point lower than that of the cold storage material and can flow in the utilization temperature range. Therefore, heat transfer fluid 110 is not limited to water. However, if water is used as the heat transfer fluid 110, there is an effect that it can be obtained inexpensively and in large quantities.

Moreover, in Embodiments 1 and 2, as an example of the cold storage unit 115, a configuration in which a plurality of cold storage units 115 are stacked on the mount 116 has been described. The cold storage unit 115 may be any unit that can accommodate the cold storage material 120 . Therefore, the cold storage unit 115 is not limited to a configuration in which a plurality of cold storage units are stacked on the mount 116, and may be an appropriately designed single cold storage unit. However, if a structure in which a plurality of cold storage units 115 are stacked on a pedestal 116 is used, the plurality of cold storage units 115 can be divided and carried into the heat storage tank 105, making handling easier. has the effect of

Further, in Embodiments 1 and 2, as an example of the flow path for flowing the heat transfer medium liquid 110 to the cold storage unit 115, the configuration including the upstream partition plate 117 and the downstream partition plate 118 has been described. The flow path for the heat medium liquid 110 to flow through the cold storage unit 115 may be any one that can suppress short-circuited flow without passing through the cold storage unit 115 . Therefore, the flow path for flowing the heat medium liquid 110 to the cold storage unit 115 is not limited to the configuration including the upstream partition plate 117 and the downstream partition plate 118 . However, the use of the configuration including the upstream partition plate 117 and the downstream partition plate 118 has the effect of suppressing the heat transfer liquid 110 from short-circuiting the cold storage unit 115 and flowing.

In addition, as a flow path for flowing the heat medium liquid 110 to the cold storage unit 115, the discharge port of the second cooling flow path 190 is arranged in the space below the cold storage unit 115 at the bottom, and the cold storage unit 115 is used as the heat medium. A configuration in which layers are stacked up to a position higher than the liquid surface of the liquid 110 may be used. This configuration has the effect of omitting the installation of the upstream partition plate 117 and making the configuration simpler.

Further, in Embodiments 1 and 2, clathrate hydrate has been described as an example of the cold storage material 120 . The cold storage material 120 may be any material that stores cold by undergoing a phase change from liquid to solid at a predetermined temperature and releases cold by undergoing a phase change from solid to liquid. Therefore, the cold storage material 120 is not limited to clathrate hydrate. However, if a clathrate hydrate is used as the cold storage material 120, by changing the guest substance, the phase changes from liquid to solid at a temperature close to the temperature range to be used, thereby storing cold, and the phase changes from solid to liquid. There is an effect that it can be cooled by standing.

Moreover, in Embodiments 1 and 2, as an example of the shape of the cold storage material 120, it has been described that it has a rectangular parallelepiped shape. The cold storage material 120 may be any material that stores cold by undergoing a phase change from liquid to solid at a predetermined temperature and releases cold by undergoing a phase change from solid to liquid. Therefore, the shape of the cold storage material 120 is not limited to a rectangular parallelepiped shape.

Furthermore, in Embodiments 1 and 2, as an example of the object to be cooled 155, a device that requires temperature adjustment in the manufacturing process has been described. The object 155 to be cooled should be maintained at a temperature higher than the melting point of the cold storage material 120 . Therefore, the object to be cooled 155 is not limited to equipment that requires temperature adjustment in the manufacturing process. It may be a device that generates heat during manufacturing, an air conditioner, a fan coil unit, or the like.

The first cooling channel 180 and the second cooling channel 190 used in Embodiments 1 and 2 are typically pipes except for the pump and the cooling unit. The pipe is made of metal, for example, but is not limited to this, and may be made of an appropriate material according to conditions such as the type of heat medium to be used.

Note that the above-described embodiment is for illustrating the technology in the present disclosure, and various changes, replacements, additions, omissions, etc. can be made within the scope of the claims or equivalents thereof.

The present disclosure reduces the energy required for cooling the heat medium liquid, and operates the cooling device without changing the flow path of the heat medium liquid that cools the object to be cooled. can be applied to a cooling system in which switching is performed between an operation in which cooling is performed simultaneously, and an operation in which cooling of the cold storage material and cooling of the object to be cooled are performed simultaneously. Specifically, in order to shift the time zone of cold heat utilization, it has a heat storage tank in which a cold storage unit containing a cold storage material is immersed in a heat transfer liquid, and a heat transfer liquid used for air conditioning or cooling in the manufacturing process. The present disclosure is applicable to a cooling system that supplies

REFERENCE SIGNS LIST 100 cooling system 105 heat storage tank 110 heat transfer liquid 115 cold storage unit 116 mount 117 upstream partition plate 118 downstream partition plate 120 cold storage material 121 cold storage material storage box 122 lid with opening 125 mixing tank 130 partition wall 131 partition wall 135 cooling device 140 Inlet 142 First position 144 Second position 145 Outlet 146 Third position 148 Fourth position 150 Pump 155 Cooling target 160 Pump 165 Suction port 170 Discharge port 180 First cooling channel 185 First cooling section 190 Second Cooling channel 195 Second cooling unit 200 Cooling system 205 Heat medium liquid tank 215 First bypass channel 220 First flow regulator 225 Temperature detection means 230 Second bypass channel 235 Second flow regulator 240 1 storage tank 245 2nd storage tank

Claims (9)

a cold storage unit containing a cold storage material;
a heat storage tank in which the heat transfer liquid is stored and the cold storage unit is immersed;
a mixing tank in which the heat transfer liquid is communicable with the heat storage tank;
a cooling device for cooling the heat transfer liquid;
a first cooling flow path through which the heat transfer fluid flows from the mixing tank, passes through a first cooling section for cooling an object to be cooled, and flows out to the mixing tank;
a second cooling flow path through which the heat transfer liquid flows from the mixing tank, passes through a second cooling section cooled by the cooling device, and flows out to the heat storage tank;
with
The melting point of the cold storage material is higher than the melting point of the heat transfer liquid and lower than the preset temperature of the object to be cooled.
cooling system. the heat transfer liquid suction port of the first cooling flow path is arranged at a position lower than the heat transfer liquid discharge port of the first cooling flow path;
A cooling system according to claim 1 . a first position in the heat storage tank between the mixing tank and the cold storage unit and lower than the liquid level of the heat transfer liquid; and a liquid level of the heat transfer liquid in the mixing tank in the second cooling flow path. a first bypass flow path through which the heat transfer fluid flows, connecting a second position between the position and the second cooling section;
temperature detection means for detecting the temperature of the heat transfer liquid stored in the heat storage tank at a position opposite to the mixing tank with respect to the cold storage unit;
a first flow rate regulator arranged in the first bypass flow path for controlling the flow rate of the heat transfer liquid flowing through the first bypass flow path in accordance with the temperature detected by the temperature detection means;
further comprising
3. A cooling system according to claim 1 or 2. a third position between the second position and the second cooling section in the second cooling flow path; a fourth position between the position of the liquid surface and a second bypass flow path through which the heat transfer fluid flows;
a second flow rate regulator arranged in the second bypass flow path for controlling the flow rate of the heat transfer liquid flowing through the second bypass flow path in accordance with the temperature detected by the temperature detection means;
further comprising
4. The cooling system of claim 3. The mixing tank is
a first storage tank communicating with the heat storage tank so that the heat transfer liquid can flow;
a second storage tank communicating with the first storage tank so that the heat transfer liquid can flow;
has
the second cooling channel,
Flowing the heat transfer liquid from the first storage tank,
The first cooling channel is
Inflowing the heat transfer fluid from the first storage tank and flowing out the heat transfer fluid to the second storage tank,
5. A cooling system according to any one of claims 1-4. Between the second storage tank and the first storage tank and between the first storage tank and the heat storage tank, partition walls through which the heat transfer liquid can flow are further provided,
A cooling system according to claim 5 . 2. The cooling system according to claim 1, wherein the first operation and the second operation are performed when the heat transfer fluid flows through the first cooling flow path to cool the object to be cooled and flows out to the mixing tank. A method of operating a cooling system that operates by switching between
The first operation is
a step in which the heat transfer liquid flows through the second cooling passage, is cooled by the cooling device to a temperature lower than the melting point of the cold storage material and higher than the melting point of the heat transfer liquid, and flows out to the heat storage tank;
a step of mixing the heat transfer fluid having a temperature lower than the melting point of the cold storage material and higher than the melting point of the heat transfer fluid, which has flowed out into the heat storage tank, with the heat transfer fluid stored in the heat storage tank;
a step of causing the mixed heat transfer liquid to flow through the cold storage unit and store cold in the cold storage material;
The second operation is
a step in which the heat transfer liquid flows through the second cooling flow path, is cooled by the cooling device to a temperature equal to or higher than the melting point of the cold storage material and lower than the preset temperature of the object to be cooled, and flows out to the heat storage tank; ,
The heat transfer liquid flowing out to the heat storage tank and having a temperature equal to or higher than the melting point of the cold storage material and lower than the preset temperature of the object to be cooled mixes with the heat transfer liquid stored in the heat storage tank. a step;
and allowing the mixed heat transfer fluid to flow through the cold storage unit and cool the cold storage material.
how to drive. The cooling system is
a first position in the heat storage tank between the mixing tank and the cold storage unit and lower than the liquid level of the heat transfer liquid; and a liquid level of the heat transfer liquid in the mixing tank in the second cooling flow path. a first bypass flow path through which the heat transfer fluid flows, connecting a second position between the position and the second cooling section;
temperature detection means for detecting the temperature of the heat transfer liquid stored in the heat storage tank at a position opposite to the mixing tank with respect to the cold storage unit;
further comprising
controlling the flow rate of the heat transfer liquid flowing through the first bypass flow path according to the temperature detected by the temperature detection means;
The driving method according to claim 7. The cooling system is
a third position between the second position and the second cooling section in the second cooling flow path; a fourth position between the position of the liquid surface and a second bypass flow path through which the heat transfer liquid flows;
further comprising
controlling the flow rate of the heat transfer liquid flowing through the second bypass flow path according to the temperature detected by the temperature detection means;
The driving method according to claim 8.

Images