Heat dissipation method and system based on seabed prefabricated modular data center

Abstract

The invention relates to the technical field of seabed data center refrigeration, and particularly provides a heat dissipation method and system based on a seabed prefabricated modular data center. When the temperature of a water supply pipe is not higher than 22 DEG C, a ground radiation cooling mode is adopted; when the temperature in the square cabin is higher than 28 DEG C and the detected temperature of the water supply pipe is not higher than 18 DEG C, the water supply and return pipe is directly connected with a heat exchange coil pipe of the double-cold-source room-level air conditioner, and a ground radiation cooling and heat exchange coil pipe mixed cooling mode is adopted; when the temperature in the shelter is higher than 28 DEG C and the detected temperature of the water supply pipe is higher than 18 DEG C, the water supply and return pipe exchanges heat with a refrigerant pipe of the double-cold-source room-level air conditioner through a water-fluorine heat exchanger, and a ground radiation cooling and compressor mixed cooling mode is adopted; when the temperature of the water supply pipe is higher than 22 DEG C, the water supply and return pipe exchanges heat with the refrigerant pipe of the double-cold-source room-level air conditioner through the water-fluorine heat exchanger, and a compressor cooling mode is adopted. Compared with the prior art, the PUE of the whole data center can be reduced.

Description

Technical Field

[0001] This invention relates to the field of cooling technology for subsea data centers, and specifically provides a heat dissipation method and system based on a prefabricated modular subsea data center. Background Technology

[0002] In the digital age, information technologies such as cloud computing, 5G, big data, and artificial intelligence are developing rapidly, and computing power has become a new type of productive force in the digital economy. With the rapid development of the electronics and information industry, the development of data centers has also entered a new stage.

[0003] To promote energy conservation, carbon reduction, and green development of data centers, the 2025 National Green Data Center Recommendation Program was launched, making it imperative to reduce the energy consumption of data centers.

[0004] In the construction of prefabricated modular data centers on the seabed, the cooling method inside the container mostly adopts the traditional air-cooling mode. In the air-cooling mode, the temperature in the container is very fast in the area close to the air conditioning outlet, while the temperature drops slowly in the area far from the air outlet. It is impossible to effectively control the temperature evenly, and the long-term operation of the air conditioning terminal results in high energy consumption.

[0005] How to solve the above-mentioned technical problems is an issue that urgently needs to be addressed by those skilled in the art. Summary of the Invention

[0006] This invention addresses the shortcomings of the prior art by providing a highly practical heat dissipation method for a prefabricated modular data center based on an underwater structure.

[0007] A further technical objective of this invention is to provide a reasonably designed, safe, and applicable heat dissipation system based on a prefabricated modular data center on the seabed.

[0008] The technical solution adopted by this invention to solve its technical problem is: A heat dissipation method based on a prefabricated modular data center on the seabed. The prefabricated modular data center is located on the seabed and uses a dual-cold-source room-level air conditioner and ground radiant cooling in the container. When the temperature inside the container is detected to be below 22°C, four cooling modes are switched according to the detected water supply pipe temperature. (i) When the temperature of the water supply pipe is detected to be no higher than 22℃, the ground radiant cooling mode shall be adopted; (ii) When the temperature inside the cabin is detected to be higher than 28°C and the temperature of the water supply pipe is detected to be no higher than 18°C, the supply and return water pipes are directly connected to the dual-cold-source room-level air conditioning heat exchange coils without going through the water-fluorine heat exchanger, and a mixed cooling mode of ground radiation cooling and heat exchange coils is adopted. (III) When the temperature inside the cabin is detected to be higher than 28°C and the temperature of the water supply pipe is detected to be higher than 18°C, the supply and return water pipes and the refrigerant pipes of the dual-cold-source room-level air conditioner exchange heat through a water-fluorine heat exchanger, and adopt a mixed cooling mode of ground radiation cooling and compressor cooling. (iv) When the temperature of the water supply pipe is detected to be higher than 22°C, the supply and return water pipes and the refrigerant pipes of the dual-cold-source room-level air conditioner exchange heat through a water-fluorine heat exchanger and adopt the compressor cooling mode.

[0009] Furthermore, the ground radiant cooling module uses treated seawater that is pumped through a circulating water pump and forms a supply and return water loop network. When the first temperature sensor detects that the temperature of the supply water pipe is not higher than 22°C, the first electric valve is opened. The supply water pipe passes through the manifold and the ground radiant cooling coil, and then through the return water pipe on one side to cool the server in the cabin. The third electric valve and the second electric valve remain closed, and the dual-source room-level air conditioner is not turned on.

[0010] Furthermore, in the hybrid cooling mode of ground radiant cooling and heat exchange coil, treated seawater is pumped through a supply and return water loop network consisting of a supply pipe and a return pipe. When the temperature sensor inside the cabin detects that the temperature inside the cabin is higher than 28°C, and the second temperature sensor detects that the temperature of the supply pipe is not higher than 18°C, the third electric valve opens. The supply pipe passes through the dual-cold-source room-level air conditioning heat exchange coil, and then through one side of the return water pipe. At the same time, the first electric valve opens, and the supply pipe passes through the manifold and the ground radiant cooling coil, and then through one side of the return water pipe to cool the server inside the cabin. The second electric valve remains closed and does not pass through the water-fluorine heat exchanger.

[0011] Furthermore, in the ground radiant cooling and compressor hybrid cooling mode, treated seawater is pumped through a supply and return water loop network consisting of a supply pipe and a return pipe. When the temperature sensor inside the cabin detects a temperature higher than 28°C, and the second temperature sensor detects a temperature higher than 18°C ​​in the supply pipe, the second electric valve opens. The supply pipe and one side of the return pipe exchange heat with the refrigerant pipe on the other side through a water-fluorine heat exchanger. The dual-source room-level air conditioner on the other side completes the entire refrigeration cycle process of compressor → water-fluorine heat exchanger → throttling valve → dual-source room-level air conditioner evaporator → compressor. At the same time, the first electric valve opens, and the supply pipe passes through the manifold and the ground radiant cooling coil, and then through the return pipe on one side to cool the server inside the cabin. The third electric valve remains closed, and the dual-source room-level air conditioner heat exchange coil does not open.

[0012] Furthermore, in the compressor cooling mode, treated seawater is pumped through a circulating water pump and fed into a supply and return water loop network consisting of a supply pipe and a return pipe. When the second temperature sensor detects that the supply pipe temperature is higher than 22°C, the second electric valve opens. The supply pipe and one side of the return pipe exchange heat with the refrigerant pipe on the other side through a water-fluorine heat exchanger. The dual-source room-level air conditioner on the other side completes the entire refrigeration cycle process of compressor → water-fluorine heat exchanger → throttling valve → evaporator of the dual-source room-level air conditioner → compressor, providing cooling for the server in the cabin. The third electric valve and the first electric valve remain closed, and the heat exchange coil and manifold of the dual-source room-level air conditioner are not opened.

[0013] A heat dissipation system based on a prefabricated modular data center on the seabed, performing the method, includes a return water pipe and a supply water pipe. Treated seawater enters the return water pipe, is circulated, and then flows out through the supply water pipe. The return water pipe is divided into three outlets. The first path connects to the dual-cold-source room-level air conditioning heat exchange coil and then flows into the water supply pipe. The second path connects to the water-fluoride heat exchanger, the dual-source room-level air conditioner evaporator, and the compressor before flowing into the water supply pipe; The third line connects to the manifold and then flows into the water supply pipe.

[0014] Furthermore, a second temperature sensor and a third electric valve are sequentially installed on the first pipeline, which is then connected to the dual-source room-level air conditioning heat exchange coil.

[0015] Furthermore, a second electric valve is installed on the second pipeline, which is then connected to the water-fluoride heat exchanger; A throttling valve is provided between the outlet pipe of the water-fluorine heat exchanger and the evaporator of the dual-source room-level air conditioner, and a compressor is provided between the inlet pipe of the water-fluorine heat exchanger and the evaporator of the dual-source room-level air conditioner.

[0016] Furthermore, a first temperature sensor and a first electric valve are sequentially installed on the third pipeline before flowing into the manifold.

[0017] Compared with existing technologies, the heat dissipation method and system of the present invention based on a prefabricated modular data center on an underwater surface have the following outstanding advantages: This invention can make full use of the natural cooling source of seawater and reduce the running time of terminal air conditioning compressors, thereby reducing PUE (Total Energy Consumption of Data Centers / Energy Consumption of IT Equipment), meeting the national requirements for energy conservation and emission reduction, and achieving the goals of energy saving, safety and reliability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a flowchart illustrating a heat dissipation method based on a prefabricated modular data center on the seabed. Figure 2 This is a structural schematic diagram of a heat dissipation method based on a prefabricated modular data center on the seabed; Figure 3 This is a schematic diagram of the internal piping and equipment layout of a heat dissipation method based on a prefabricated modular data center on the seabed. Figure 4 This is a schematic diagram of the floor radiant cooling coil layout inside the cabin of a heat dissipation method based on a prefabricated modular data center on the seabed. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The following is a preferred embodiment: like Figure 1-4 As shown in this embodiment, a heat dissipation method based on a prefabricated modular data center on the seabed is described. The prefabricated modular data center is located on the seabed, and the container uses a dual-cold-source room-level air conditioner and ground radiant cooling. When the temperature inside the container is detected to be 20°C, four cooling modes are switched according to the detected water supply pipe temperature. (i) When the temperature of the water supply pipe is detected to be 20℃, the ground radiant cooling mode shall be adopted; The ground-based radiant cooling module uses treated seawater, which is circulated by a water pump and forms a supply and return water loop network through supply and return pipes. This avoids the problem in traditional air-cooled systems where the temperature drops rapidly in areas close to the air conditioning vents while cooling is slower in areas farther away. Because it is ground-based radiant cooling, it can achieve effective and uniform temperature control.

[0022] When the first temperature sensor detects a water supply pipe temperature of 20°C, the first electric valve is opened. The water supply pipe passes through the manifold and the ground radiant cooling coil, and then through a return water pipe on one side to cool the server inside the container. The third and second electric valves remain closed, and the dual-source room-level air conditioning is not turned on, ensuring that seawater does not pass through the relevant components of the dual-source room-level air conditioning. The air conditioning fan and compressor are not working, saving at least 11 kWh of electricity per hour. This not only saves energy but also reduces PUE and makes full use of the natural cold source of seawater for cooling.

[0023] (ii) When the temperature inside the cabin is detected to be 30°C and the temperature of the water supply pipe is detected to be 16°C, the supply and return water pipes are directly connected to the dual-cold-source room-level air conditioning heat exchange coils without going through the water-fluorine heat exchanger, and a mixed cooling mode of ground radiation cooling and heat exchange coils is adopted. The hybrid cooling mode combining ground radiant cooling and heat exchange coils involves treated seawater circulating through a supply and return water loop network formed by a supply and return water pipe. When the temperature sensor inside the shelter detects a temperature of 30°C, and the second temperature sensor detects a supply water pipe temperature of 16°C, the third electric valve opens. The supply water then passes through the dual-source room-level air conditioning heat exchange coil and one side of the return water pipe. Simultaneously, the first electric valve opens, and the supply water passes through the manifold and ground radiant cooling coil, again through one side of the return water pipe, to cool the servers inside the shelter. The second electric valve remains closed, bypassing the water-refrigerant heat exchanger, the dual-source room-level air conditioning evaporator, and the compressor. With the compressor not operating, at least 10 kWh of electricity is saved per hour, thus saving energy and reducing the power usage effect (PUE).

[0024] (III) When the temperature inside the cabin is detected to be 30°C and the temperature of the water supply pipe is detected to be 20°C, the supply and return water pipes and the refrigerant pipes of the dual-cold-source room-level air conditioner exchange heat through a water-fluorine heat exchanger. The ground radiation cooling and compressor mixed cooling mode is adopted. Since the ground radiation cooling can also lower the temperature, the mixed cooling mode can also slightly reduce the compressor's operating time, thereby reducing the PUE.

[0025] The ground radiant cooling and compressor hybrid cooling mode involves treated seawater circulating through a water pump and a supply and return water loop network consisting of supply and return water pipes. When the temperature sensor inside the cabin detects a temperature of 30°C and the second temperature sensor detects a temperature of 19°C in the supply water pipe, the second electric valve opens. The supply water pipe and one side of the return water pipe exchange heat with the refrigerant pipe on the other side through a water-fluorine heat exchanger. The dual-source room-level air conditioner on the other side completes the entire refrigeration cycle: compressor → water-fluorine heat exchanger → expansion valve → dual-source room-level air conditioner evaporator → compressor.

[0026] The first electric valve is opened, and the water supply pipe, through the manifold and ground radiant cooling coils, and then through a return pipe on one side, cools the servers inside the container, using natural cold sources to lower the temperature inside the container. Because the compressor can operate at a variable frequency, and with the effect of the ground radiant cooling coils, the temperature inside the container decreases. The compressor can operate at a variable frequency according to the temperature inside the container, which can help reduce the compressor's operating time, saving at least 1-10 kWh of electricity per hour.

[0027] At this time, the third electric valve remains closed, and the heat exchange coil of the dual-source room-level air conditioner does not turn on.

[0028] (iv) When the temperature of the water supply pipe is detected to be 25°C, the supply and return water pipes and the refrigerant pipes of the dual-cold-source room-level air conditioner exchange heat through a water-fluorine heat exchanger and adopt the compressor cooling mode.

[0029] In the compressor cooling mode, treated seawater is pumped through a circulating water pump and flows through a supply and return water loop network consisting of supply and return water pipes. When the second temperature sensor detects a supply water pipe temperature of 25°C, the second electric valve opens. The supply water pipe and one side of the return water pipe exchange heat with the refrigerant pipe on the other side through a water-fluorine heat exchanger. The dual-source room-level air conditioner on the other side completes the entire refrigeration cycle process of compressor → water-fluorine heat exchanger → expansion valve → evaporator of the dual-source room-level air conditioner → compressor, providing cooling for the server in the cabin.

[0030] At this time, the third electric valve and the first electric valve remain closed, and the dual-source room-level air conditioning heat exchange coil and manifold are not turned on.

[0031] Based on the above process, priority should be given to ensuring that air conditioning is not used as much as possible when using natural seawater cooling sources; secondly, mixed cooling should be used; and finally, air conditioning-grade cooling should be used.

[0032] By flexibly switching between the above four cooling modes, this application can efficiently and reasonably achieve heat dissipation based on the actual temperature conditions of the prefabricated modular data center on the seabed, thus ensuring the normal operation of the data center.

[0033] Among them, such as Figure 3-4 As shown, the air conditioners in the dual-cold-source rooms on the left and right sides of the shelter are mutually redundant; there are two water distribution units, which are mutually redundant. Figure 2 As shown, there are two circulating water pumps, which serve as backups for each other.

[0034] like Figure 2 As shown, a heat dissipation system based on a prefabricated modular data center on the seabed in this embodiment performs the above method, including a return water pipe and a supply water pipe. The treated seawater enters the return water pipe, is circulated, and then flows out through the supply water pipe. The return water pipe flows out in three directions. The first path connects to the dual-cold-source room-level air conditioning heat exchange coil and then flows into the water supply pipe to complete the circulation. This is the heat exchange coil cooling mode. The second path connects to the water-fluoride heat exchanger, the dual-cold-source room-level air conditioner evaporator, and the compressor before flowing into the water supply pipe to complete the circulation. This is the compressor-cooled mode. The third line connects to the manifold and flows into the water supply pipe to complete the circulation; this is the ground radiant cooling mode.

[0035] The first pipeline (i.e., the hot coil cooling mode) is equipped with a second temperature sensor and a third electric valve in sequence, which are then connected to the dual-cold-source room-level air conditioning heat exchange coil.

[0036] A second electric valve is installed on the second pipeline (i.e., the compressor cooling mode), which is then connected to the water-fluorine heat exchanger; A throttling valve is installed between the outlet pipe of the water-refrigerant heat exchanger and the evaporator of the dual-source room-level air conditioner. The throttling valve regulates the water flow and pressure. A compressor is installed between the inlet pipe of the water-refrigerant heat exchanger and the evaporator of the dual-source room-level air conditioner.

[0037] The third pipeline (i.e., the ground radiant cooling mode) is equipped with a first temperature sensor and a first electric valve in sequence, and then flows into the manifold.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat dissipation method based on a prefabricated modular data center on an underwater surface, characterized in that, The prefabricated modular data center is located on the seabed. The container uses dual-cold-source room-level air conditioning and ground radiant cooling. When the temperature inside the container is detected to be below 22°C, four cooling modes are switched according to the detected water supply pipe temperature. (i) When the temperature of the water supply pipe is detected to be no higher than 22℃, the ground radiant cooling mode shall be adopted; (ii) When the temperature inside the cabin is detected to be higher than 28°C and the temperature of the water supply pipe is detected to be no higher than 18°C, the supply and return water pipes are directly connected to the dual-cold-source room-level air conditioning heat exchange coils without going through the water-fluorine heat exchanger, and a mixed cooling mode of ground radiation cooling and heat exchange coils is adopted. (III) When the temperature inside the cabin is detected to be higher than 28°C and the temperature of the water supply pipe is detected to be higher than 18°C, the supply and return water pipes and the refrigerant pipes of the dual-cold-source room-level air conditioner exchange heat through a water-fluorine heat exchanger, and adopt a mixed cooling mode of ground radiation cooling and compressor cooling. (iv) When the temperature of the water supply pipe is detected to be higher than 22°C, the supply and return water pipes and the refrigerant pipes of the dual-cold-source room-level air conditioner exchange heat through a water-fluorine heat exchanger and adopt the compressor cooling mode.

2. The heat dissipation method based on a prefabricated modular data center on an underwater surface according to claim 1, characterized in that, The ground radiant cooling module uses treated seawater, which is pumped through a water supply and return loop formed by a water supply pipe and a return pipe. When the first temperature sensor detects that the temperature of the water supply pipe is not higher than 22°C, the first electric valve is opened. The water supply pipe passes through the manifold and the ground radiant cooling coil, and then through the return pipe on one side to cool the server in the cabin. The third electric valve and the second electric valve remain closed, and the dual-source room-level air conditioner is not turned on.

3. The heat dissipation method based on a prefabricated modular data center on an underwater surface according to claim 1, characterized in that, The hybrid cooling mode of ground radiant cooling and heat exchange coil involves treated seawater circulating through a supply and return water loop network formed by a supply and return water pipe. When the temperature sensor inside the container detects a temperature higher than 28°C, and the second temperature sensor detects a supply water pipe temperature not higher than 18°C, the third electric valve opens. The supply water pipe then passes through the dual-cold-source room-level air conditioning heat exchange coil, and then through one side of the return water pipe. Simultaneously, the first electric valve opens, and the supply water pipe passes through the manifold and the ground radiant cooling coil, and then through one side of the return water pipe to cool the server inside the container. The second electric valve remains closed, and the water does not pass through the water-fluorine heat exchanger.

4. A heat dissipation method based on a prefabricated modular data center on an underwater surface, as described in claim 1, is characterized in that... The ground radiant cooling and compressor hybrid cooling mode involves treated seawater circulating through a supply and return water network formed by a water supply and return pipe. When the temperature sensor inside the cabin detects a temperature higher than 28°C, and the second temperature sensor detects a temperature higher than 18°C ​​in the supply pipe, the second electric valve opens. The supply pipe and one side of the return water pipe exchange heat with the refrigerant pipe on the other side through a water-fluorine heat exchanger. After the compressor finishes, the refrigerant flows through the water-fluorine heat exchanger and then through the throttling valve to reach the evaporator and compressor of the dual-source room-level air conditioner on the other side, completing the entire refrigeration cycle. At the same time, the first electric valve opens, and the supply water pipe passes through the manifold and the ground radiant cooling coil, and then through the return water pipe on one side to cool the server inside the cabin. The third electric valve remains closed, and the dual-source room-level air conditioner heat exchange coil does not open.

5. A heat dissipation method based on a prefabricated modular data center on an underwater surface, as described in claim 1, characterized in that... The compressor cooling mode involves treated seawater circulating through a water pump and a supply and return water loop formed by the supply and return water pipes. When the second temperature sensor detects that the supply water pipe temperature is higher than 22°C, the second electric valve opens. The supply water pipe and one side of the return water pipe exchange heat with the refrigerant pipe on the other side through the water-fluorine heat exchanger. After the compressor finishes, the refrigerant flows through the water-fluorine heat exchanger and then through the throttling valve to reach the evaporator and compressor of the dual-source room-level air conditioner, completing the entire refrigeration cycle to cool the server in the cabin. The third electric valve and the first electric valve remain closed, and the heat exchange coil and manifold of the dual-source room-level air conditioner are not opened.

6. A heat dissipation system based on a prefabricated modular data center on an underwater surface, characterized in that, The method described in any one of claims 1-5 includes a return water pipe and a supply water pipe. The treated seawater enters the return water pipe, is circulated, and then flows out through the supply water pipe. The return water pipe is divided into three outlets. The first path connects to the dual-cold-source room-level air conditioning heat exchange coil and then flows into the water supply pipe. The second path connects to the water-fluoride heat exchanger, the dual-source room-level air conditioner evaporator, and the compressor before flowing into the water supply pipe; The third line connects to the manifold and then flows into the water supply pipe.

7. A heat dissipation system based on a prefabricated modular data center on an underwater surface, as described in claim 6, is characterized in that... A second temperature sensor and a third electric valve are installed sequentially on the first pipeline, which is then connected to the dual-source room-level air conditioning heat exchange coil.

8. A heat dissipation system based on a prefabricated modular data center on an underwater surface, as described in claim 7, is characterized in that... A second electric valve is installed on the second pipeline, which is then connected to the water-fluoride heat exchanger; A throttling valve is provided between the outlet pipe of the water-fluorine heat exchanger and the evaporator of the dual-source room-level air conditioner, and a compressor is provided between the inlet pipe of the water-fluorine heat exchanger and the evaporator of the dual-source room-level air conditioner.

9. A heat dissipation system based on a prefabricated modular data center on an underwater surface, as described in claim 8, is characterized in that... The first temperature sensor and the first electric valve are installed in sequence on the third pipeline, and then the water flows into the manifold.

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