Cooling liquid anti-volatilization method and system of single-phase immersed liquid cooling system

Abstract

The invention belongs to the technical field of server liquid cooling system anti-volatilization methods, and particularly relates to a cooling liquid anti-volatilization method and system of a single-phase immersed liquid cooling system, a to-be-cooled server is placed in the single-phase immersed liquid cooling system, cooling liquid at a specified height is injected, and the liquid level of the cooling liquid is higher than the highest point of the server; anti-volatilization liquid with the specified height is injected into the liquid level of the cooling liquid; a data acquisition device is arranged in the anti-volatilization liquid and close to the layering liquid level of the anti-volatilization liquid and the cooling liquid, and the data acquisition device acquires conductivity data of the position where the data acquisition device is located in real time and transmits the conductivity data to a control module; and the control module analyzes the conductivity data in real time, and when the conductivity suddenly changes, the water pump is started to pump quantitative anti-volatilization liquid to the upper part of the liquid level of the cooling liquid so as to supplement the anti-volatilization liquid. According to the process, the existing single-phase immersed liquid cooling system is improved, so that the volatilization loss of the fluorocarbon cooling liquid is reduced, and the cost is greatly reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-volatilization methods for server liquid cooling systems, and in particular relates to a method and system for anti-volatilization of coolant in a single-phase immersion liquid cooling system. Background Art

[0002] With the exponential growth of data and computing, a large amount of computing power needs to be supported by a large number of servers. The large amount of data throughput and calculation makes the data center, which is the "brain" of emerging technologies such as artificial intelligence and big data, face unprecedented energy consumption and heat dissipation challenges: on the one hand, the computing and storage power consumption of IT equipment such as servers is very large, and on the other hand, the power consumption used to cool IT equipment in the data center is also growing rapidly. In this context, liquid cooling data centers that use liquid cooling technology and liquid cooling servers and other equipment have emerged, providing a new solution for the heat dissipation and cooling of data centers. Liquid cooling refers to the use of liquid instead of air as a refrigerant to exchange heat for heat-generating components and remove heat. In a single-phase immersion liquid cooling system, all heat-generating components of IT equipment are immersed in a circulating non-conductive coolant, and the heat generated by the equipment is directly transferred to the coolant. The coolant of single-phase immersion liquid cooling usually has a high boiling point. After the coolant absorbs heat, it does not undergo phase change and always remains in a liquid state. Single-phase immersion liquid cooling drives the circulation of the coolant through natural convection or pumps. The circulation heat dissipation process driven by natural convection utilizes the heat dissipation of the liquid after it is heated.

[0003] Due to the characteristic of reduced volume expansion density, the hotter coolant will naturally float up and then be cooled by the heat exchanger connected to the external cooling circuit. The cooled liquid naturally sinks under the action of gravity, completing the circulation heat dissipation. Compared with natural convection, the method of driving the circulating coolant with a pump can more effectively improve the cooling capacity.

[0004] In a single-phase immersion liquid cooling system, fluorocarbon coolants are usually more volatile and have relatively high evaporation losses, so the sealing requirements for the liquid cooling system are higher, but their viscosity is low, and the drag loss when replacing equipment is small. When replacing liquids, the main consideration is the service life of the liquid. Generally speaking, the service life of fluorocarbon coolants is longer than that of hydrocarbon and silicone coolants. Specifically, natural oils such as mineral oils have more impurities and their shelf life is usually less than 5 years. With good maintenance and without considering other risk factors, the service life of synthetic oils can reach up to 10 years, while fluorocarbon coolants can far exceed 20 years. Relatively speaking, fluorocarbon coolants are more suitable for single-phase immersion liquid cooling systems, but how to reduce the volatilization loss of fluorocarbon coolants has become its most important technical issue. The existing anti-volatilization means of fluorocarbon coolants are mainly the server cabinet (TANK) sealing method, that is, using a more sealed TANK to reduce the volatilization of fluorocarbon coolants, or choosing more expensive coolants that are not easy to volatilize. However, this method of reducing the volatilization of fluorocarbon coolants requires a high cost to seal the equipment.

[0005] Therefore, how to improve the existing single-phase immersion liquid cooling system to reduce the volatilization loss of fluorocarbon coolants and reduce costs is a technical problem that urgently needs to be solved. Summary of the invention

[0006] The object of the present invention is to provide a method and system for preventing the volatilization of coolant in a single-phase immersion liquid cooling system, so as to improve the existing single-phase immersion liquid cooling system, reduce the volatilization loss of fluorocarbon coolant and reduce the cost.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0008] A method for preventing the volatilization of coolant in a single-phase immersion liquid cooling system comprises the following steps:

[0009] S1: placing a server to be cooled in a single-phase immersion liquid cooling system, injecting a specified height of coolant into the single-phase immersion liquid cooling system, wherein the liquid level of the coolant is greater than the highest point height of the server;

[0010] S2: injecting an anti-volatile liquid to a specified height at the liquid surface of the coolant, wherein the density of the anti-volatile liquid is less than the density of the coolant, and the anti-volatile liquid is not easy to evaporate and is conductive;

[0011] S3: a data acquisition device is arranged in the anti-volatile liquid and near the stratified liquid surface of the anti-volatile liquid and the coolant, wherein the data acquisition device collects conductivity data of the position in real time and transmits the conductivity data monitored by time to the control module;

[0012] S4: The control module analyzes the conductivity data in real time and determines whether a sudden change in conductivity occurs. If so, step S5 is executed. If not, the data acquisition device continuously monitors the conductivity of the location where it is located and transmits it to the control module in real time.

[0013] S5: Start the water pump to draw a certain amount of anti-volatile liquid from the anti-volatile liquid storage device to the upper part of the liquid surface of the coolant to replenish the anti-volatile liquid.

[0014] Preferably, when the server in the single-phase immersion liquid cooling system needs maintenance, the anti-volatile liquid above the liquid surface of the fluorocarbon coolant is extracted through the coolant distribution unit. During the extraction of the anti-volatile liquid, the data acquisition device monitors the conductivity data of its position in real time, and transmits the conductivity data monitored in real time at its position to the control module. The control module performs real-time analysis based on the acquired conductivity data to determine whether the monitored conductivity has a sudden change. If so, the extraction device of the coolant distribution unit is immediately turned off.

[0015] Preferably, the anti-volatile liquid is water.

[0016] Preferably, the data acquisition module is a conductivity meter.

[0017] Preferably, the specific process of the control module analyzing the conductivity data in real time in step S4 is as follows:

[0018] S41: the control module performs data preprocessing on the received conductivity data, removes noise data in the conductivity data, and corrects the deviation value data of the conductivity;

[0019] S42: Processing the conductivity data after removing the noise data and correcting the deviation value, and drawing a conductivity change curve in real time;

[0020] S43: The control module analyzes in real time whether there is a conductivity mutation point in the conductivity change curve according to the drawn conductivity change curve.

[0021] Preferably, the coolant is a fluorocarbon coolant.

[0022] In a second aspect, a coolant anti-evaporation system for a single-phase immersion liquid cooling system is provided, which implements any one of the methods for preventing coolant from evaporating for a single-phase immersion liquid cooling system, comprising a coolant distribution unit, a data acquisition module, a data preprocessing module, and a control module, wherein the coolant distribution unit comprises a pump, a heat exchanger, a sensor, and a filter, the coolant distribution unit is connected to the data acquisition module, the data acquisition module is connected to the data preprocessing module, and the data preprocessing module is connected to the control module;

[0023] The coolant distribution unit, driven by the pump, flows the low-temperature coolant through the heating element of the server to take away the heat generated by the heating element of the server, and the heated coolant enters the heat exchanger to be cooled down under the drive of the pump, and the cooled coolant continues to circulate under the action of the pump to deliver the low-temperature coolant to the heating element of the server;

[0024] The data acquisition module is used to collect the conductivity data of the location in real time and transmit the conductivity data monitored over time to the control module;

[0025] The data preprocessing module is used to perform data preprocessing on the conductivity data collected in real time, remove noise data in the conductivity data, and correct the deviation value data of the conductivity;

[0026] The control module is used to analyze the conductivity data in real time, determine whether a sudden change in conductivity occurs, and control the water pump and the coolant distribution unit.

[0027] Preferably, the heat exchanger uses water as a cooling medium, and the heat is discharged through a circulating water system.

[0028] The beneficial effects of the present invention include:

[0029] The present invention provides a method and system for preventing the evaporation of coolant in a single-phase immersion liquid cooling system. The server to be cooled is placed in the single-phase immersion liquid cooling system and a specified height of coolant is injected, wherein the liquid level of the coolant is greater than the highest point of the server; a specified height of anti-evaporation liquid is injected at the liquid level of the coolant; a data acquisition device is arranged in the anti-evaporation liquid and near the stratified liquid level of the anti-evaporation liquid and the coolant, and the data acquisition device collects the conductivity data of the position in real time and transmits it to the control module; the control module analyzes the conductivity data in real time, and when a sudden change in conductivity occurs, a water pump is started to extract a certain amount of anti-evaporation liquid to the upper liquid level of the coolant to replenish the anti-evaporation liquid. The above process improves the existing cooling method of the single-phase immersion liquid cooling system, and effectively reduces the purchase and loss costs of the coolant at a very low cost through the water seal method. Compared with the prior art of setting a sealing device for the single-phase immersion liquid cooling system, the equipment cost is greatly reduced.

[0030] At the same time, when the server in the single-phase immersion liquid cooling system needs maintenance, the anti-volatile liquid above the liquid surface of the fluorocarbon coolant is extracted through the coolant distribution unit, and the conductivity data of its location is monitored in real time and transmitted to the control module. The control module performs real-time analysis based on the acquired conductivity data to determine whether the monitored conductivity has a sudden change. This process realizes intelligent automatic operation during liquid cooling or maintenance of the server, greatly reduces manual maintenance costs, and is easy to maintain.

[0031] The received conductivity data is preprocessed by the control module to remove noise data in the conductivity data and correct the deviation data of the conductivity; the conductivity data after the noise data is removed and the deviation value is corrected is processed, and the conductivity change curve is drawn in real time; the control module analyzes in real time whether there is a conductivity mutation point in the conductivity change curve according to the drawn conductivity change curve, thereby avoiding the influence of noise data and abnormal data in the conductivity data on subsequent data analysis results, and realizing accurate analysis based on conductivity data to obtain the precise injection time of subsequent water, thereby ensuring that the volatilization of the coolant is effectively reduced during the server liquid cooling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The present invention is a structural diagram of the cooling liquid anti-evaporation system of the single-phase immersion liquid cooling system.

[0033] Figure 2 The present invention is a schematic flow diagram of a method for preventing the volatilization of a coolant in a single-phase immersion liquid cooling system.

[0034] Figure 3 It is a schematic diagram of the flow chart of the control module of the present invention analyzing the conductivity data in real time. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1 to Figure 3 The present invention is further described in detail:

[0036] Example 1

[0037] See attached Figure 2 As shown, a method for preventing the volatilization of coolant in a single-phase immersion liquid cooling system comprises the following steps:

[0038] S1: placing a server to be cooled in a single-phase immersion liquid cooling system, injecting a specified height of coolant into the single-phase immersion liquid cooling system, wherein the liquid level of the coolant is greater than the highest point height of the server;

[0039] S2: injecting an anti-volatile liquid to a specified height at the liquid surface of the coolant, wherein the density of the anti-volatile liquid is less than the density of the coolant, and the anti-volatile liquid is not easy to evaporate and is conductive;

[0040] S3: a data acquisition device is arranged in the anti-volatile liquid and near the stratified liquid surface of the anti-volatile liquid and the coolant, wherein the data acquisition device collects conductivity data of the position in real time and transmits the conductivity data monitored by time to the control module;

[0041] S4: The control module analyzes the conductivity data in real time and determines whether a sudden change in conductivity occurs. If so, step S5 is executed. If not, the data acquisition device continuously monitors the conductivity of the location where it is located and transmits it to the control module in real time.

[0042] S5: Start the water pump to draw a certain amount of anti-volatile liquid from the anti-volatile liquid storage device to the upper part of the liquid surface of the coolant to replenish the anti-volatile liquid.

[0043] The above process is to place the server to be cooled in a single-phase immersion liquid cooling system and inject a specified height of coolant, the liquid level of the coolant is greater than the highest point height of the server; inject a specified height of anti-volatile liquid at the liquid level of the coolant; set a data acquisition device in the anti-volatile liquid and close to the stratified liquid level of the anti-volatile liquid and the coolant, the data acquisition device collects the conductivity data of its position in real time and transmits it to the control module; the control module analyzes the conductivity data in real time, and when a sudden change in conductivity occurs, starts the water pump to extract a certain amount of anti-volatile liquid to the upper liquid level of the coolant to replenish the anti-volatile liquid. The above process improves the cooling method of the existing single-phase immersion liquid cooling system, and effectively reduces the cost of purchasing and losing coolant at a very low cost through the water seal method, which greatly reduces the equipment cost compared to the prior art of setting a sealing device for the single-phase immersion liquid cooling system.

[0044] Example 2

[0045] When the server in the single-phase immersion liquid cooling system needs maintenance, the anti-volatile liquid above the liquid surface of the fluorocarbon coolant is extracted through the coolant distribution unit. During the extraction of the anti-volatile liquid, the data acquisition device monitors the conductivity data of its position in real time, and transmits the conductivity data monitored in real time to the control module. The control module performs real-time analysis based on the acquired conductivity data to determine whether the monitored conductivity has a sudden change. If so, the extraction device of the coolant distribution unit is immediately closed.

[0046] When a server in a single-phase immersion liquid cooling system needs maintenance, the anti-volatile liquid above the liquid surface of the fluorocarbon coolant is extracted through the coolant distribution unit, and the conductivity data of its location is monitored in real time and transmitted to the control module. The control module performs real-time analysis based on the acquired conductivity data to determine whether the monitored conductivity has a sudden change. This process realizes intelligent automatic operation during liquid cooling or maintenance of the server, greatly reduces manual maintenance costs, and is easy to maintain.

[0047] In this embodiment, the anti-volatile liquid is water, and the data acquisition module is a conductivity meter.

[0048] Example 3

[0049] Based on Example 1 or Example 2, see Figure 3 As shown, the specific process of the control module analyzing the conductivity data in real time in step S4 is as follows:

[0050] S41: the control module performs data preprocessing on the received conductivity data, removes noise data in the conductivity data, and corrects the deviation value data of the conductivity;

[0051] S42: Processing the conductivity data after removing the noise data and correcting the deviation value, and drawing a conductivity change curve in real time;

[0052] S43: The control module analyzes in real time whether there is a conductivity mutation point in the conductivity change curve according to the drawn conductivity change curve.

[0053] The received conductivity data is preprocessed by the control module to remove noise data in the conductivity data and correct the deviation data of the conductivity; the conductivity data after the noise data is removed and the deviation value is corrected is processed, and the conductivity change curve is drawn in real time; the control module analyzes in real time whether there is a conductivity mutation point in the conductivity change curve according to the drawn conductivity change curve, thereby avoiding the influence of noise data and abnormal data in the conductivity data on subsequent data analysis results, and realizing accurate analysis based on conductivity data to obtain the precise injection time of subsequent water, thereby ensuring that the volatilization of the coolant is effectively reduced during the server liquid cooling process.

[0054] A coolant anti-evaporation system for a single-phase immersion liquid cooling system, realizing any one of the methods for preventing coolant from evaporating in a single-phase immersion liquid cooling system, see Figure 1 As shown, it includes a coolant distribution unit, a data acquisition module, a data preprocessing module, and a control module. The coolant distribution unit includes a pump, a heat exchanger, a sensor, and a filter. The coolant distribution unit is connected to the data acquisition module, the data acquisition module is connected to the data preprocessing module, and the data preprocessing module is connected to the control module.

[0055] The coolant distribution unit, driven by the pump, flows through the heat generating element of the server with low temperature, takes away the heat generated by the server heat generating element, and the heated coolant enters the heat exchanger driven by the pump to be cooled. The cooled coolant continues to circulate under the action of the pump, and delivers the low temperature coolant to the heat generating element of the server. The coolant is a fluorocarbon coolant.

[0056] The data acquisition module is used to collect the conductivity data of its location in real time and transmit the time-monitored conductivity data to the control module. The data preprocessing module is used to preprocess the conductivity data collected in real time, remove the noise data in the conductivity data, and correct the deviation value data of the conductivity. The control module is used to analyze the conductivity data in real time, determine whether there is a sudden change in conductivity, and control the water pump and the coolant distribution unit. The heat exchanger uses water as a cooling medium, and the heat is discharged through the circulating water system.

[0057] In summary, the present invention provides a method and system for preventing the evaporation of coolant in a single-phase immersion liquid cooling system. The server to be cooled is placed in the single-phase immersion liquid cooling system and a specified height of coolant is injected, and the liquid level of the coolant is greater than the highest point of the server; a specified height of anti-evaporation liquid is injected at the liquid level of the coolant; a data acquisition device is set in the anti-evaporation liquid and close to the stratified liquid level of the anti-evaporation liquid and the coolant, and the data acquisition device collects the conductivity data of its position in real time and transmits it to the control module; the control module analyzes the conductivity data in real time, and when a sudden change in conductivity occurs, the water pump is started to extract a certain amount of anti-evaporation liquid to the upper liquid level of the coolant to replenish the anti-evaporation liquid. The above process improves the existing cooling method of the single-phase immersion liquid cooling system. Through the water seal method, the purchase and loss costs of the coolant are effectively reduced at a very low cost. Compared with the prior art of setting a sealing device for the single-phase immersion liquid cooling system, the equipment cost is greatly reduced.

[0058] When a server in a single-phase immersion liquid cooling system needs maintenance, the anti-volatile liquid above the liquid surface of the fluorocarbon coolant is extracted through the coolant distribution unit, and the conductivity data of its location is monitored in real time and transmitted to the control module. The control module performs real-time analysis based on the acquired conductivity data to determine whether the monitored conductivity has a sudden change. This process realizes intelligent automatic operation during liquid cooling or maintenance of the server, greatly reduces manual maintenance costs, and is easy to maintain. The received conductivity data is preprocessed by the control module to remove noise data in the conductivity data and correct the deviation data of the conductivity; the conductivity data after the noise data is removed and the deviation value is corrected is processed, and the conductivity change curve is drawn in real time; the control module analyzes in real time whether there is a conductivity mutation point in the conductivity change curve according to the drawn conductivity change curve, thereby avoiding the influence of noise data and abnormal data in the conductivity data on subsequent data analysis results, and realizing accurate analysis based on conductivity data to obtain the precise injection time of subsequent water, thereby ensuring that the volatilization of the coolant is effectively reduced during the server liquid cooling process.

Claims

1. A method for preventing the volatilization of coolant in a single-phase immersion liquid cooling system, characterized in that: The following steps are involved: S1: placing a server to be cooled in a single-phase immersion liquid cooling system, injecting a specified height of coolant into the single-phase immersion liquid cooling system, wherein the liquid level of the coolant is greater than the highest point height of the server; S2: injecting an anti-volatile liquid to a specified height at the liquid surface of the coolant, wherein the density of the anti-volatile liquid is less than the density of the coolant, and the anti-volatile liquid is not easy to evaporate and is conductive; S3: a data acquisition device is arranged in the anti-volatile liquid and near the stratified liquid surface of the anti-volatile liquid and the coolant, wherein the data acquisition device collects conductivity data of the position in real time and transmits the conductivity data monitored by time to the control module; S4: The control module analyzes the conductivity data in real time and determines whether a sudden change in conductivity occurs. If so, step S5 is executed. If not, the data acquisition device continuously monitors the conductivity of the location where it is located and transmits it to the control module in real time. S5: Start the water pump to draw a certain amount of anti-volatile liquid from the anti-volatile liquid storage device to the upper part of the liquid surface of the coolant to replenish the anti-volatile liquid.

2. The method for preventing the volatilization of the coolant in a single-phase immersion liquid cooling system according to claim 1, characterized in that: When the server in the single-phase immersion liquid cooling system needs maintenance, the anti-volatile liquid above the liquid surface of the fluorocarbon coolant is extracted through the coolant distribution unit. During the extraction of the anti-volatile liquid, the data acquisition device monitors the conductivity data of its position in real time, and transmits the conductivity data monitored in real time to the control module. The control module performs real-time analysis based on the acquired conductivity data to determine whether the monitored conductivity has a sudden change. If so, the extraction device of the coolant distribution unit is immediately closed.

3. The method for preventing the volatilization of the coolant in a single-phase immersion liquid cooling system according to claim 2, characterized in that: The anti-volatile liquid is water.

4. The method for preventing the volatilization of the coolant in a single-phase immersion liquid cooling system according to claim 2, characterized in that: The data acquisition module is a conductivity meter.

5. The method for preventing the volatilization of the coolant in a single-phase immersion liquid cooling system according to claim 1, characterized in that: The specific process of the control module analyzing the conductivity data in real time in step S4 is as follows: S41: the control module performs data preprocessing on the received conductivity data, removes noise data in the conductivity data, and corrects the deviation value data of the conductivity; S42: Processing the conductivity data after removing the noise data and correcting the deviation value, and drawing a conductivity change curve in real time; S43: The control module analyzes in real time whether there is a conductivity mutation point in the conductivity change curve according to the drawn conductivity change curve.

6. The method for preventing the volatilization of the coolant in a single-phase immersion liquid cooling system according to claim 1, characterized in that: The coolant is a fluorocarbon coolant.

7. A coolant anti-evaporation system for a single-phase immersion liquid cooling system, which implements a coolant anti-evaporation method for a single-phase immersion liquid cooling system as claimed in any one of claims 1 to 6, characterized in that: It includes a coolant distribution unit, a data acquisition module, a data preprocessing module, and a control module. The coolant distribution unit includes a pump, a heat exchanger, a sensor, and a filter. The coolant distribution unit is connected to the data acquisition module, the data acquisition module is connected to the data preprocessing module, and the data preprocessing module is connected to the control module. The coolant distribution unit, driven by the pump, flows the low-temperature coolant through the heating element of the server to take away the heat generated by the heating element of the server, and the heated coolant enters the heat exchanger to be cooled down under the drive of the pump, and the cooled coolant continues to circulate under the action of the pump to deliver the low-temperature coolant to the heating element of the server; The data acquisition module is used to collect the conductivity data of the location in real time and transmit the conductivity data monitored over time to the control module; The data preprocessing module is used to perform data preprocessing on the conductivity data collected in real time, remove noise data in the conductivity data, and correct the deviation value data of the conductivity; The control module is used to analyze the conductivity data in real time, determine whether a sudden change in conductivity occurs, and control the water pump and the coolant distribution unit.

8. The coolant anti-evaporation system of a single-phase immersion liquid cooling system according to claim 6, characterized in that: The heat exchanger uses water as a cooling medium, and the heat is discharged through a circulating water system.

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