Immersion tank flow equalizing system and control method thereof

Abstract

The invention provides an immersed tank flow equalizing system and a control method thereof, the system comprises a CDU and a plurality of tank units, a server is placed in each tank unit, a water pump is integrated in each tank unit, the flow is regulated and controlled in real time through the water pumps, and flow equalization and real-time flow allocation are realized. According to the invention, the flow of the distributed immersed tank liquid cooling system can be balanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat dissipation equipment, in particular to an immersion tank flow equalization system and a control method thereof. BACKGROUND

[0002] It is an inevitable trend for data center cooling technology to be refined. In the existing single-phase immersion liquid cooling cabinet, the cooling liquid directly enters through the bottom of the tank, relies on passive cooling and servers for heat exchange, and is discharged from the top to complete heat exchange. For chips, the heat exchange inside the tank belongs to large-space natural convection heat exchange or passive heat exchange. The passive cooling of natural convection has a heat dissipation limit of only 17W / cm2, and the heat exchange efficiency is not high, which cannot meet the heat dissipation demand of high heat flux density. When the distributed system has a large heat dissipation load or the pipeline system is complex, it is often impossible to realize uniform flow among tanks or on-demand allocation. When hydraulic imbalance occurs between cabinets, insufficient flow in individual cabinets will cause the liquid cooling cabinet to operate at high temperature for a long time, which poses a great risk in actual system operation. In the immersion liquid cooling system, there are multiple heat exchanges, and the coupling between each subsystem is strong, making it difficult to achieve optimal energy consumption adjustment of the overall system through distributed control. A control method that can optimize from a global perspective is needed. In the immersion liquid cooling system, due to the high specific heat of the cooling liquid, the temperature rise of the liquid pool has a strong hysteresis, and the control effect after changing the control parameters also has a strong hysteresis. In view of the time difference between the input and the controlled quantity, a more effective method is needed to solve the temperature control problem.

[0003] Therefore, it is very important to design a single-phase immersion liquid cooling system for data centers that can meet the heat dissipation demand of high heat flux density and a self-adaptive control method thereof. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the present application is to provide an immersion tank flow equalization system and a control method thereof, which can balance the flow of a distributed immersion tank liquid cooling system.

[0005] To solve the above problems, the technical solution of the present application is as follows:

[0006] An immersion tank flow equalization system includes a CDU and multiple tank units. Each tank unit is placed with a server, and each tank unit is integrated with a water pump. The water pump is used to control the flow in real time, realize flow balance and real-time flow allocation.

[0007] Preferably, the water pump is a diaphragm pump or other pump with the same bidirectional cutoff function or an electromagnetic valve, which realizes the function of controlling the flow.

[0008] Preferably, the tank unit is also integrated with a control module, which can communicate with the server and the water pump.

[0009] Further, the application also provides a control method for the immersion tank flow equalization system, comprising the following steps:

[0010] transmitting the changes of the server power or the cooling liquid temperature to the tank control module in real time;

[0011] adjusting the water pump or the electromagnetic valve according to the server power or the cooling liquid temperature by the tank control module;

[0012] controlling the flow of the cooling liquid by controlling the water pump or the electromagnetic valve, so as to realize real-time and safe heat dissipation.

[0013] Preferably, the step of transmitting the changes of the server power or the cooling liquid temperature to the tank control module in real time comprises the following steps: transmitting the server power data or the cooling liquid temperature data monitored by the temperature sensor to the control module in real time.

[0014] Preferably, the step of adjusting the water pump or the electromagnetic valve according to the server power or the cooling liquid temperature by the tank control module comprises the following steps: controlling the water pump and the electromagnetic valve to increase or decrease the flow according to the increase or decrease of the server power or the cooling liquid temperature data by the PID adjustment mode.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] 1. The application can balance the flow of the distributed immersion tank liquid cooling system.

[0017] 2. The application can real-time adjust the flow demand in the distributed system, reduce the PUE, and increase the system reliability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Other features, objects and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings:

[0019] Figure 1 Fig. 1 is a structural schematic diagram of the immersion tank flow equalization system of the application;

[0020] Figure 2 Fig. 2 is a flow chart of the control method for the immersion tank flow equalization system of the application. DETAILED DESCRIPTION

[0021] The application will be described in detail below with specific examples. The following examples will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the application. These are within the scope of protection of the application.

[0022] Specifically, the application provides an immersion tank flow equalization system, as shown in Figure 1 The system includes a CDU and a plurality of tank units, and the system is a 1+N architecture, that is, one CDU corresponds to N immersion tanks, and a server is placed in the tank. Figure 1 There are two CDUs in the tank, and the redundant CDU is designed redundantly. Figure 1 The blue pipeline in the tank is a CDU cold water outlet pipeline, and the red pipeline is a CDU return water pipeline after heat exchange in the tank. In this embodiment, a water pump is integrated in each tank unit to meet the flow demand of the tank. Each tank can adjust the flow in real time according to the server power to realize flow equalization and real-time flow allocation, and thus realize real-time and safe heat dissipation.

[0023] Preferably, the water pump can be a diaphragm pump or other pump with the same bidirectional cutoff function, which can block the backflow of the coolant. Further, an electromagnetic valve can be used instead of the water pump to realize the function of controlling the flow.

[0024] Preferably, the tank unit further integrates a control module, which can communicate with the server and the water pump.

[0025] Further, the application also provides a control method of the immersion tank flow equalization system, as shown in Figure 2 The method includes the following steps:

[0026] S1: Real-time transmission of server power or coolant temperature changes to the tank control module;

[0027] Specifically, the server power supply data or the coolant temperature data monitored by the temperature sensor are transmitted to the control module.

[0028] S2: The tank control module adjusts the water pump or electromagnetic valve according to the server power or coolant temperature;

[0029] Specifically, by PID adjustment mode, for example, if the server power or coolant temperature data rises, the water pump and electromagnetic valve increase the flow, and vice versa. The specific PID parameters are adjusted according to different products.

[0030] S3: Control the flow of the coolant by controlling the water pump or electromagnetic valve to realize real-time and safe heat dissipation.

[0031] Specifically, after adjusting the water pump or the electromagnetic valve, the coolant temperature will fluctuate, and through continuous PID adjustment until the heat exchange balance, the coolant temperature tends to be stable.

[0032] The specific embodiments of the application are described above. It needs to be understood that the application is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the application. The embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily without conflict.

Claims

1. A submerged tank flow equalization system, characterized in that, The system includes a CDU and multiple tank units. Each tank unit contains a server and integrates a water pump. The water pump controls the flow rate in real time to achieve flow balance and real-time flow allocation.

2. The immersion tank flow equalization system according to claim 1, characterized in that, The water pump is a diaphragm pump or other pumps or solenoid valves with the same bidirectional shut-off function, which realizes the function of controlling the flow rate.

3. The immersion tank flow equalization system according to claim 1, characterized in that, The tank unit also integrates a control module, which can communicate with both the server and the water pump.

4. A control method for a submerged tank flow equalization system, characterized in that, The method includes the following steps: Transmit changes in server power or coolant temperature to the tank control module in real time; The tank control module adjusts the water pump or solenoid valve according to the server power or coolant temperature. Real-time and safe heat dissipation is achieved by controlling the flow of coolant through a water pump or solenoid valve.

5. The control method for the immersion tank flow equalization system according to claim 4, characterized in that, The step of transmitting changes in server power or coolant temperature to the tank control module in real time specifically includes: transmitting server power data or coolant temperature data monitored by a temperature sensor to the control module in real time.

6. The control method for the immersion tank flow equalization system according to claim 4, characterized in that, The steps of the tank control module to adjust the water pump or solenoid valve according to the server power or coolant temperature specifically include: using PID control, controlling the water pump and solenoid valve to increase or decrease the flow rate according to the rise or fall of server power or coolant temperature data.

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