Modular thermal energy storage device and cooling system using it

Abstract

The present invention discloses a modular thermal energy storage device and a cooling system utilizing the same. The present invention comprises a modular thermal energy storage device that utilizes a phase change material (PCM) as a storage medium to store cold energy and release it when needed, configured by connecting the device in series or in parallel to a cooling system. Accordingly, it secures a high cold energy storage density relative to the same volume, maximizes energy efficiency, allows for flexible adaptation to various installation environments, improves space utilization, enhances system operational efficiency and reduces maintenance costs by enabling maintenance and replacement on a modular basis, facilitates the expansion of storage capacity, and effectively responds to the cooling demands of various electronic equipment such as server rooms, telecommunication base stations, and industrial control devices. Furthermore, it enables stable cooling system operation by monitoring the status of each module in real time and automatically adjusting operating conditions through a sensor-based control system, and enhances economic feasibility by enabling standardization and mass production.

Description

Technology Field

[0001] The present invention relates to a cooling technology for temperature management of high-heat electronic equipment, such as servers, communication devices, and industrial control devices. More specifically, it relates to a modular thermal energy storage device and a cooling system utilizing the same, which enables the use of thermal energy stored by a phase change material (PCM) for cooling high-heat electronic equipment. Background Technology

[0003] In military systems, high-heat electronic equipment generates a large amount of heat per unit area due to the presence of high-performance and high-heat components; therefore, to maintain the performance of such equipment, the components must be able to operate within an appropriate temperature range.

[0004] Accordingly, conventionally, as shown in the attached Fig. 1, a chiller (1) is connected to a thermal energy storage device (TES; Thermal Energy Storage) (2), and a heat load (3) is connected to the thermal energy storage device (2).

[0005] At this time, the thermal energy storage device (2) is an integrated structure fixed to the cooling device (1), and is composed of a heat exchanger, a storage tank, and a discharge unit, and operates by collecting energy from an external heat source or cold source, storing it, and releasing it to the outside when necessary.

[0006] That is, the above thermal energy storage device (2) uses a phase change material (PCM) (e.g., paraffin, salt hydrate, molten salt, etc.) that causes a phase change at high or low temperatures to store or release heat as a latent heat-based material, and causes a phase change of the material (e.g., solid↔liquid) at high or low temperatures to store and release heat through the latent heat accompanying this.

[0007] However, the latent heat-based thermal energy storage device (2) described above has a structural limitation in that, as it forms an integrated structure with the cooling device (1), it lacks flexibility regarding the installation environment and has the inconvenience of having to separate the entire cooling system for maintenance, and it is difficult to expand the storage capacity, making it difficult to respond to various cooling demands. Prior art literature

[0009] Registered Patent Publication No. 10-1586794 (Published Jan. 19, 2016) Registered Patent Publication No. 10-2069881 (Published Jan. 23, 2020) Registered Patent Publication No. 10-2089546 (Published Mar. 16, 2020) Published Patent Publication No. 10-2022-0033440 (Published Mar. 16, 2022) Registered Patent Publication No. 10-2598889 (Published Nov. 06, 2023) Registered Patent Publication No. 10-2610064 (Published Dec. 05, 2023) The problem to be solved

[0010] The problem to be solved by the present invention is to provide a modular thermal energy storage device and a cooling system utilizing the same, which enables efficient temperature management of high-heat electronic equipment with various installation environments by securing a high cold energy storage density relative to the same volume and maximizing energy efficiency through the configuration of connecting a modular thermal energy storage device, which stores cold energy using a phase change material (PCM) as a storage medium and releases it when necessary, to a cooling device in series or parallel. means of solving the problem

[0012] A modular thermal energy storage device, which is a means for solving the problem of the present invention, comprises: a heat exchange assembly that collects a cold heat source; a storage assembly that uses a phase change material as a storage medium, absorbs and stores cold heat through a phase change from the cold heat source collected by the heat exchange assembly, and releases the stored cold heat to the heat exchange assembly through a reverse phase change; and a control assembly that induces a phase change or reverse phase change of the phase change material at a preset temperature according to the state information of the heat exchange assembly and the storage assembly, and monitors the induced phase change or reverse phase change state as well as the cold heat storage capacity.

[0013] In addition, the heat exchange assembly comprises: a cold heat source circulation unit having an inlet and an outlet; and a heat exchange unit formed on the outer surface of the cold heat source circulation unit, which collects cold heat from a cold heat source circulating in the cold heat source circulation unit and transfers it to the storage assembly, and cools the cold heat source circulating from the cold heat released from the storage assembly.

[0014] In addition, the above-mentioned cold source circulation unit is configured in a quick connector manner so that individual assemblies can be replaced during assembly, separation, and maintenance.

[0015] In addition, the storage assembly comprises a storage tank filled with a phase change material, and an insulating material is formed on the outer wall of the storage tank to prevent cold heat loss to the outside.

[0016] In addition, the above-mentioned phase change material contains alumina nanoparticles internally to maximize heat transfer.

[0017] In addition, the control assembly includes: a sensor unit that detects state information of the heat exchange assembly and the storage assembly in real time; and a control unit that controls the phase change and reverse phase change of the phase change material to maintain the cold heat storage and cold heat release efficiency of the storage assembly at a constant level based on the detection information of the sensor unit.

[0018] According to another aspect, a cooling system using the modular thermal energy storage device comprises a cooling section in which a heat transfer medium circulates, and a cooling processing section connected to the cooling section that cools a load equipment using a cold heat source that exchanges heat with the heat transfer medium circulating in the cooling section, wherein the cooling processing section is configured to have a modular thermal energy storage device that cools the load equipment by storing and releasing cold heat using the cold heat source, connected interchangeably in series or parallel.

[0019] In addition, the above cooling unit is configured such that the compressor, condenser, condensing fan, evaporator, and expansion valve form a refrigerant circulation cycle through the refrigerant line.

[0020] In addition, the cooling treatment unit is configured to connect the evaporator and the load equipment via a cold heat supply line and a cold heat recovery line, wherein the cold heat supply line is connected to the modular thermal energy storage device, a storage tank for storing cold heat, and a pump controlled by the cooling control unit to supply the cold heat stored in the storage tank to the load equipment, and a thermometer is formed in each of the cold heat supply line and the cold heat recovery line.

[0021] In addition, the control assembly included in the modular thermal energy storage device is configured to control the operation of the cooling system using the monitoring information performed in real time or to transmit the monitoring information to the cooling control unit.

[0022] In addition, the storage assembly included in the modular thermal energy storage device is configured to absorb heat generated from the load equipment under the control of the control assembly and to store cold heat when the solid-liquid phase change of the phase change material is induced.

[0023] In addition, the control assembly included in the above-mentioned modular thermal energy storage device is configured to automatically control the operation of the cooling system according to the cooling demand of the load equipment.

[0024] In addition, the control assembly included in the modular thermal energy storage device detects the state of the phase change material of the storage assembly in real time and controls the operation of the expansion valve and the temperature of the cold source for mode switching according to the amount of heat generated by the load equipment, and is equipped with a control program that re-solidifies the phase change material through the cold source when the heat storage capacity of the storage assembly reaches a critical value.

[0025] In addition, the cooling system is configured to be controlled in a rapid cooling mode that rapidly charges the modular thermal energy storage device while separating the cooling path from the load equipment to shorten the refreezing time of the phase change material by setting the temperature of the cold energy lower than the default value.

[0026] In addition, the cooling system is configured to be controlled in a cooling mode that cools the load equipment through the modular thermal energy storage device.

[0027] In addition, the load equipment connected to the cooling treatment unit has a continuous heat load that generates constant heat over a long period of time.

[0028] In addition, the load equipment having the above continuous heat generation load is any one of a power converter, electro-optical equipment, control system, or sensor unit.

[0029] In addition, the cooling unit further includes an auxiliary evaporator, and the auxiliary evaporator is configured to be connected to an expansion valve and a load equipment having a periodic heat-generating load that generates high heat for a short period of time, and the load equipment having a periodic heat-generating load is configured to be cooled through a high-speed cooling loop such as the vapor compression refrigeration cycle of the cooling unit. Effects of the invention

[0031] As such, the present invention comprises a modular thermal energy storage device that utilizes a phase change material (PCM) as a storage medium to store cold energy and release it when needed, configured by connecting it to a cooling device in series or parallel. Through this, it secures a high cold energy storage density relative to the same volume, maximizes energy efficiency, and improves space utilization while flexibly responding to various installation environments. Furthermore, by enabling maintenance and replacement on a modular basis, it increases system operational efficiency and reduces maintenance costs. Additionally, it facilitates the expansion of storage capacity and effectively meets the cooling demands of various electronic equipment, such as server rooms, telecommunication base stations, and industrial control devices. Moreover, through a sensor-based control system, it enables stable operation of the cooling system by monitoring the status of each module in real time and automatically adjusting operating conditions. Finally, it is expected to enhance economic efficiency by enabling standardization and mass production.

[0032] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0034] FIG. 1 is a schematic block diagram of a cooling system using a conventional modular thermal energy storage device. FIG. 2 is a schematic structural diagram of a modular thermal energy storage device as an embodiment of the present invention. FIG. 3 is a schematic block diagram of a cooling system using a series of modular thermal energy storage devices as an embodiment of the present invention. FIG. 4 is a schematic block diagram of a cooling system using a series of modular thermal energy storage devices as an embodiment of the present invention. FIG. 5 is a block circuit diagram of a rapid cooling mode of a cooling system using a series of modular thermal energy storage devices as an embodiment of the present invention. FIG. 6 is a block circuit diagram of a cooling mode of a cooling system using a series of modular thermal energy storage devices as an embodiment of the present invention. FIG. 7 is a schematic block diagram of a cooling system using parallel modular thermal energy storage devices as an embodiment of the present invention. Specific details for implementing the invention

[0035] The detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. It should also be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the invention is limited only by the appended claims, including all equivalents to those claimed therein, provided appropriately described. Similar reference numerals in the drawings refer to the same or similar functions across various aspects.

[0036] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

[0037] FIG. 2 is a schematic block diagram showing a structure in which a plurality of cooling modules are connected in series to a supply module as an embodiment of the present invention, FIG. 3 is a schematic block diagram showing a structure in which a plurality of cooling modules are connected in parallel to a supply module as an embodiment of the present invention, and FIG. 4 is a schematic block diagram showing each configuration of a plurality of cooling modules and a supply module as an embodiment of the present invention.

[0038] FIG. 2 illustrates a schematic structural diagram of a modular thermal energy storage device as an embodiment of the present invention.

[0039] Referring to the attached FIG. 2, a modular thermal energy storage device (10) according to an embodiment of the present invention may include a heat exchange assembly (11), a storage assembly (12), and a control assembly (13).

[0040] The above heat exchange assembly (11) collects a cold heat source from the outside, and may include a cold heat source circulation section (11a) and a heat exchange section (11b).

[0041] The above cold source circulation unit (11a) has an inlet and an outlet, and is configured in a quick connector manner so that the assembly can be connected and separated and replaced during maintenance.

[0042] That is, the above cold source circulation unit (11a) is configured to allow for easy coupling and separation when a plurality of modular thermal energy storage devices (10,…,10n), as shown in the attached FIG. 3 or FIG. 4 to 7, are connected in series or in parallel.

[0043] Here, the series or parallel connection of the modular thermal energy storage devices (10,…,10n) is configured by connecting the heat exchange assembly (11) and the storage assembly (12) in series or parallel in an add-on manner, excluding the control assembly (13).

[0044] The heat exchanger (11b) is formed on the outer surface of the cold heat source circulation unit (11a) and can be configured to collect cold heat from the cold heat source circulating in the cold heat source circulation unit (11a), transfer it to the storage assembly (12), and cool the cold heat source circulating from the cold heat released from the storage assembly (12).

[0045] The above storage assembly (12) utilizes a phase change material (PCM) as a storage medium and is configured to absorb and store cold heat through a phase change from a cold heat source collected by the heat exchange assembly (11) and to release the stored cold heat to the heat exchange assembly (11) through a reverse phase change. This includes a storage tank (12a) filled with a phase change material (PCM), and an insulating material (12b) may be formed on the outer wall of the storage tank (12a) to prevent cold heat loss to the outside.

[0046] Here, the phase change material may contain alumina nanoparticles internally to maximize heat transfer.

[0047] The control assembly (13) is configured to induce a phase change or reverse phase change of the phase change material at a preset temperature according to the state information (e.g., temperature, pressure, flow rate, etc.) of the heat exchange assembly (11) and the storage assembly (12), and to monitor the induced phase change or reverse phase change state as well as the cold energy storage capacity, and may include a sensor unit (13a) and a control unit (13b).

[0048] That is, the sensor unit (13a) detects the state information of the heat exchange assembly (11) and the storage assembly (12) in real time, and the control unit (13b) can be configured to control the phase change and reverse phase change of the phase change material to maintain the cold heat storage and cold heat release efficiency of the storage assembly (12) at a constant level based on the detection information of the sensor unit (13a).

[0049] As such, the modular thermal energy storage device (10) according to the embodiment of the present invention utilizes a phase change material (PCM) as a storage medium to secure a high cold energy storage density relative to the same volume while maximizing energy efficiency. By adopting a modular structure, it can flexibly respond to various installation environments and improve space utilization. Furthermore, by enabling maintenance and replacement in modular units, it can increase the efficiency of system operation and reduce maintenance costs. Additionally, since the storage capacity can be easily expanded, it can effectively respond to the cooling demands of various electronic equipment.

[0050] Meanwhile, the modular thermal energy storage device (10) described above can be operated to a stable cooling system (20) by monitoring the status of each module in real time and automatically adjusting the operating conditions through a sensor-based control system, as illustrated in the attached FIGS. 3 to 6.

[0051] That is, as shown in the attached FIGS. 3 to 6, the cooling system (20) using the modular thermal energy storage device (10) comprises a cooling section (21) through which a heat transfer medium (e.g., refrigerant) circulates, and a cooling processing section (22) connected to the cooling section (21) and which cools the load equipment (30) using a cold heat source that exchanges heat with the heat transfer medium circulating in the cooling section (21). The modular thermal energy storage device (10, ..., 10n) that cools the load equipment (30) by storing and releasing cold heat using the cold heat source in the cooling processing section (22) can be connected in series as shown in the attached FIGS. 3 to 6 or configured to be interchangeably connected in parallel as shown in the attached FIG. 7.

[0052] The above cooling unit (21) is configured such that a compressor (21a), a condenser (21b), a condensing fan (21c), an evaporator (21d), and an expansion valve (21e) form a refrigerant circulation cycle through a refrigerant line (L1). As this is a known technology, a detailed description thereof will be omitted below.

[0053] Here, the cooling unit (21) may further include an auxiliary evaporator (21f), and the auxiliary evaporator (21f) may be configured to be connected to an expansion valve (21g) and a load equipment (30') having a periodic heat-generating load that generates high heat for a short period of time, and the load equipment (30') having a periodic heat-generating load may be configured to be cooled through a high-speed cooling loop such as a vapor compression refrigeration cycle of the cooling unit (21).

[0054] Additionally, the cooling treatment unit (22) is configured to connect the evaporator (21d) and the load equipment (30) to a cold heat supply line (L2) and a cold heat recovery line (L3), wherein the cold heat supply line (L2) is connected to the modular thermal energy storage device (10,…,10n), a storage tank (22a) that stores cold heat, and a pump (22c) controlled by a cooling control unit (22b) that supplies the cold heat stored in the storage tank (22a) to the load equipment (30), and a thermometer (22d) is formed in each of the cold heat supply line (L2) and the cold heat recovery line (L3). This is also a known technology, and a detailed description thereof will be omitted below.

[0055] Here, the load equipment (30) connected to the cooling treatment unit (22) has a continuous heat generation load that generates a constant amount of heat over a long period of time, and may be any one of a power converter, an electro-optical device, a control system, or a sensor unit, but is not necessarily limited thereto.

[0056] At this time, the storage assembly (12) included in the modular thermal energy storage device (10,…,10n) can be configured to absorb heat generated from the load equipment (30) under the control of the control assembly (13) and to store cold heat when the solid-liquid phase change of the phase change material is induced.

[0057] In addition, the control assembly (13) included in the modular thermal energy storage device (10,…,10n) may be configured to control the operation of the cooling system (20) using the monitoring information that is performed in real time, or to transmit the monitoring information to the cooling control unit (22b), so as to automatically control the operation of the cooling system (20) according to the cooling demand of the load equipment (30).

[0058] That is, the control assembly (13) is equipped with a control program that detects the state of the phase change material of the storage assembly (12) in real time and controls the operation of the expansion valve (21e) and the temperature of the cold source for mode switching according to the amount of heat generated by the load equipment (30), and re-solidifies the phase change material through the cold source when the heat storage capacity of the storage assembly (12) reaches a critical value. Accordingly, as shown in the attached FIG. 5, the cooling system (20) is configured to be controlled in a rapid cooling mode that rapidly charges the modular thermal energy storage device (10) by separating the cooling path from the load equipment (30) to shorten the re-freezing time of the phase change material while setting the temperature of the cold source lower than the basic value, or as shown in the attached FIG. 6, it can be configured to be controlled in a cooling mode that cools the load equipment (30) through the modular thermal energy storage device (10).

[0059] That is, the above rapid cooling mode temporarily separates the cooling path from the load equipment (30) having a heat load to enable rapid charging of the modular thermal energy storage device (10), which allows the temperature of the cooling water (heat transfer fluid) to be set lower than the default value to shorten the refreezing time of the PCM, and the above cooling mode allows the load equipment (30) having a heat load to be cooled through the modular thermal energy storage device (10).

[0060] In this way, the cooling system (20) using the modular thermal energy storage device (10) according to an embodiment of the present invention, as shown in the attached FIGS. 2 to 7, when an external cold heat source is supplied to the heat exchange assembly (11) by the cooling unit (21), the cold heat source is transferred to the storage assembly (12) through the heat exchange assembly (11).

[0061] Then, the PCM in the storage assembly (12) stores cold energy through a phase change under the control of the control assembly (13), and the stored cold energy can be released to the outside through a reverse phase change under the control of the control assembly (13) when necessary.

[0062] Accordingly, the cold heat emitted from the storage assembly (12) is a mixture of pulse-type heat that generates high heat for a short period of time and continuous-type heat that generates constant heat over a long period of time, and can be continuously delivered to the load equipment (30) connected to the cooling processing unit (22) to perform cooling.

[0063] That is, the cooling system (20) according to the embodiment of the present invention responds to load equipment (30') with periodic heat generation loads through a high-speed cooling loop such as a vapor compression refrigeration cycle, and responds to load devices (30) with continuous heat generation loads through a heat storage method utilizing a PCM, thereby simultaneously securing thermal management stability and energy efficiency of the entire system, as well as enabling customized application for each load equipment through a modular structure and allowing for flexible response during maintenance and capacity expansion.

[0064] Although the technical concept of the modular thermal energy storage device and the cooling system using the same according to the present invention has been described above together with the accompanying drawings, this is merely an illustrative description of the best embodiment of the present invention and is not intended to limit the invention.

[0065] Accordingly, the present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary knowledge in the art to which the invention pertains can make various modifications without departing from the essence of the invention as claimed in the claims, and such modifications will be within the scope of the claims. Explanation of the symbols

[0067] 10; Modular thermal energy storage device 11; Heat exchange assembly 11a; Cold source circulation section 11b; Heat exchange section 12; Storage assembly 12a; Storage tank 12b; insulation 13; control assembly 13a; Sensor unit 13b; Control unit 20; Cooling system 21; Cooling section 21a; Compressor 21b; Condenser 21c; condenser fan 21d; evaporator 21e, 21g; expansion valve 21f; auxiliary evaporator 22; Cooling treatment unit 22a; Storage tank 22b; Cooling control unit 22c; Pump 22d; Thermometer 30, 30'; Load equipment L1; Refrigerant line L2; Cold supply line L3; Cold and heat recovery line

Claims

Claim 1 delete Claim 2 delete Claim 3 delete Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 A cooling unit configured such that a heat transfer medium circulates, and a compressor, condenser, condensing fan, evaporator, and expansion valve form a refrigerant circulation cycle through a refrigerant line; a cooling treatment unit configured such that the evaporator and load equipment are connected to a cold heat supply line and a cold heat recovery line, and the load equipment is cooled by a cold heat source that is heat-exchanged by the heat transfer medium circulating in the cooling unit, wherein the cold heat supply line is formed with a storage tank for storing cold heat and a pump controlled by a cooling control unit to supply the cold heat stored in the storage tank to the load equipment, and a thermometer is formed in the cold heat supply line and the cold heat recovery line, respectively; and a modular thermal energy storage device comprising a heat exchange assembly, a storage assembly, and a control assembly, which is interchangeably connected to the cold heat supply line in series or parallel and cools the load equipment by storing and releasing cold heat using the cold heat source.The cooling control unit is configured to be controlled in a discharge mode that cools the load equipment through the modular thermal energy storage device, or configured to be controlled in a rapid storage mode that rapidly charges the modular thermal energy storage device while separating the cooling flow path from the load equipment to shorten the refreezing time of the phase change material by setting the temperature of the cold energy lower than the default value; the heat exchange assembly includes a cold energy source circulation unit formed in a quick connector manner having an inlet and an outlet to enable coupling and separation between assemblies and replacement of individual assemblies during maintenance, and a heat exchange unit formed on the outer surface of the cold energy source circulation unit that collects cold energy from the cold energy source circulating in the cold energy source circulation unit and transfers it to the storage assembly, and cools the circulating cold energy source using the cold energy released from the storage assembly; the storage assembly utilizes a phase change material containing alumina nanoparticles inside as a storage medium to maximize heat transfer, absorbs and stores cold energy through phase change from the cold energy source collected by the heat exchange assembly. A cooling system using a modular thermal energy storage device, characterized by comprising a storage tank filled with a phase change material that releases stored cold heat to the heat exchange assembly through a reverse phase change, wherein the outer wall of the storage tank is configured to have an insulating material formed thereon to prevent cold heat loss to the outside, and wherein the control assembly induces a phase change or reverse phase change of the phase change material at a preset temperature according to the state information of the heat exchange assembly and the storage assembly, and monitors the induced phase change or reverse phase change state as well as the cold heat storage capacity, and wherein the control assembly includes a sensor unit that detects the state information of the heat exchange assembly and the storage assembly in real time, and a control unit that controls the phase change and reverse phase change of the phase change material to maintain the cold heat storage and cold heat release efficiency of the storage assembly at a constant level based on the detection information of the sensor unit. Claim 8 delete Claim 9 delete Claim 10 A cooling system using a modular thermal energy storage device according to claim 7, characterized in that the control assembly included in the modular thermal energy storage device is configured to control the operation of the cooling system using the monitoring information performed in real time or to transmit the monitoring information to the cooling control unit. Claim 11 A cooling system using a modular thermal energy storage device according to claim 7, wherein the storage assembly included in the modular thermal energy storage device is configured to absorb heat generated from the load equipment according to the control of the control assembly and store cold heat when a solid-liquid phase change of the phase change material is induced. Claim 12 A cooling system using a modular thermal energy storage device according to claim 7, wherein the control assembly included in the modular thermal energy storage device is configured to automatically control the operation of the cooling control unit according to the cooling demand of the load equipment. Claim 13 A cooling system using a modular thermal energy storage device according to claim 7, wherein the control assembly included in the modular thermal energy storage device controls the operation of the expansion valve and the temperature of the cold source for mode switching according to the amount of heat generated by the load equipment while detecting the state of the phase change material of the storage assembly in real time, and is equipped with a control program that re-solidifies the phase change material through the cold source when the heat storage capacity of the storage assembly reaches a critical value. Claim 14 delete Claim 15 delete Claim 16 A cooling system using a modular thermal energy storage device, characterized in that, in claim 7, the load equipment connected to the cooling treatment unit has a continuous heat generation load that generates constant heat over a long period of time. Claim 17 A cooling system using a modular thermal energy storage device, characterized in that, in claim 16, the load equipment having the continuous heat generation load is one of a power converter, an electro-optical device, a control system, or a sensor unit. Claim 18 A cooling system using a modular thermal energy storage device according to claim 7, wherein the cooling unit further includes an auxiliary evaporator, and the auxiliary evaporator is configured to be connected to an expansion valve and a load equipment having a periodic heat-generating load that generates high heat for a short period of time, and the load equipment having a periodic heat-generating load is configured to be cooled through a high-speed cooling loop such as a vapor compression refrigeration cycle of the cooling unit.

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