A liquid cooling cabinet system control method

Abstract

The application discloses a liquid cooling cabinet system control method, and a system comprising a liquid cooling cabinet, wherein the liquid cooling cabinet is connected with a dry cooler input end through a liquid pump, and the dry cooler output end is connected with the liquid cooling cabinet; the method comprises the following steps: setting liquid cooling cabinet system parameter threshold values; detecting the liquid cooling cabinet outlet temperature TC; detecting the dry cooler inlet and outlet liquid temperature difference AT and controlling based on the liquid cooling cabinet outlet temperature TC. The above technical scheme adopts a simplified immersed liquid cooling system solution, improves the energy utilization rate through one heat exchange, reduces the heat exchange process loss, further improves the immersed liquid cooling technical advantages, reduces the construction cost and operation cost, realizes the data center online and timely detection and control through periodical cycle detection and judgment, and improves the effectiveness and timely feedback of the intelligent control.

Description

A control method for a liquid-cooled cabinet system Technical Field

[0001] This invention relates to a fire-fighting device, and more particularly to a control method for a liquid-cooled cabinet system. Background Technology

[0002] With the advancement of technology and the popularization of 5G networks, the performance requirements of electronic information equipment are becoming increasingly higher, resulting in a significant increase in the heat generation and heat flux density of electronic components. Consequently, the power consumption caused by cooling the heat generated by electronic components will also increase exponentially.

[0003] Data shows that the power consumption of a single CPU chip has reached 300-400W, and that of a single GPU chip is as high as 700-800W. The power consumption of a single server rack is projected to exceed 30KW by 2025. This excessive heat generation concentrated in confined racks presents a significant challenge: how to effectively dissipate heat while ensuring temperature uniformity across servers and even individual chips. These are problems that immersion liquid-cooled server racks must address urgently. Traditional air cooling cannot meet the cooling requirements; immersion cooling is necessary to achieve high-power cooling, improve energy efficiency, and effectively enhance server computing efficiency and extend chip lifespan. However, due to variations in server load and computing power demands, peak computing power varies considerably, necessitating multi-scenario solutions for heat dissipation and optimized airflow.

[0004] Chinese patent document CN111465274B discloses a "single-rack modular server liquid cooling system and its control method." It includes a rack, liquid cooling modules, liquid-cooled servers, a coolant distribution unit, and rack cooling fans. The liquid cooling modules can be installed at any location within the rack as needed, and rack cooling fans are installed next to the liquid cooling modules within the rack. The coolant distribution unit is installed on the rear side of the rack, and the liquid cooling modules are connected to several liquid-cooled servers within the rack through the coolant distribution unit. The liquid cooling modules are used to reduce the temperature of the coolant within the liquid cooling system and ensure the coolant circulates within the system. The liquid cooling distribution unit is used to distribute the coolant processed by the liquid cooling modules to each liquid-cooled server. The liquid cooling modules are connected sequentially to the main supply pipe, the phase change element heat transfer module, and the return pipe via connecting hoses with quick connectors. This technical solution employs two heat exchange processes, resulting in a large footprint, low heat exchange efficiency, system complexity, and high maintenance costs. Summary of the Invention

[0005] This invention primarily addresses the technical problems of existing solutions that employ two heat exchange processes, resulting in large site areas, low heat exchange efficiency, complex systems, and high maintenance costs. It provides a control method for a liquid-cooled cabinet system, employing a simplified immersion liquid cooling system solution. By using a single heat exchange process, it improves energy utilization, reduces heat exchange losses, further enhances the advantages of immersion liquid cooling technology, and lowers construction and operating costs. Through periodic cyclic detection and judgment, it achieves online and timely detection and control of the data center, improving the effectiveness and timely feedback of intelligent control.

[0006] The above-mentioned technical problems of the present invention are mainly solved by the following technical solution: the system includes a liquid-cooled cabinet, the liquid-cooled cabinet is connected to the input end of a dry cooler via a liquid pump, and the output end of the dry cooler is connected to the liquid-cooled cabinet, comprising the following steps:

[0007] S1 sets the threshold values ​​for various parameters of the liquid-cooled cabinet system;

[0008] S2 detects the outlet temperature TC of the liquid-cooled cabinet;

[0009] The S3 liquid cooler cabinet outlet temperature TC detects and controls the temperature difference ΔT between the inlet and outlet liquids of the dry cooler.

[0010] Preferably, the parameter thresholds include: A ranging from 42℃ to 50℃, B ranging from 30℃ to 40℃, C ranging from 3℃ to 8℃, D ranging from 1℃ to 5℃ and D < C, M ranging from 0 to -0.1, N ranging from 0 to -0.05, and P ranging from 0.1 to -0.01.

[0011] Preferably, in step S2, if TC≥A, the liquid pump operates at a maximum frequency of 50Hz, and the dry cooler operates at full load. A is set between 42-50, and in this invention, it is set to 44℃.

[0012] Preferably, in step S3, if ΔT≥C, the first derivative f(x) of the cabinet temperature TC over 1 minute is further detected.

[0013]

[0014] If f(x) is greater than M after 1 minute, it indicates that the cooling effect of TC is not significant and the heat dissipation load needs to be further increased, i.e., the standby dry cooler should be started and the load should be rounded down to (TC / A*C / ΔT-1)*10%. If f(x) is less than M, it indicates that the cooling effect is significant and the cabinet outlet temperature should continue to be monitored. The value of C is 3-8℃, and the value of this invention patent is 5℃.

[0015] Preferably, in step S3, if ΔT≤D, the first derivative f(x) of the cabinet temperature TC over 1 minute is further detected.

[0016]

[0017] t is taken as 1 minute; if f(x) is greater than M, it indicates that the cooling effect of TC is not significant, and the heat dissipation load needs to be further increased, that is, the standby dry cooler is started and the load is (TC / A*C / ΔT-1)*30% rounded up; if f(x) is less than M, it indicates that the cooling effect is significant, and the cabinet outlet temperature is monitored. The value of D is in the range of 1-5℃, and the value of this invention patent is 2℃.

[0018] Preferably, in step S3, if D < ΔT < C, the first derivative f(x) of the cabinet temperature TC over 1 minute is further detected.

[0019]

[0020] t is taken as 1 minute; if f(x) is greater than M, it indicates that the cooling effect of TC is not significant, and the heat dissipation load needs to be further increased, that is, the backup dry cooler should be started and the load should be rounded down to (TC / A*C / ΔT-1)*20%; if f(x) is less than M, it indicates that the cooling effect is significant, and the cabinet outlet temperature should continue to be monitored. The value of C is 3-8℃, and the value of this invention is 5℃; the value of D is 1-5℃, and the value of this invention is 2℃.

[0021] As a preferred option, if B < TC < A, and if ΔT ≥ C, first reduce the fan speed by 10%, and then further detect the first derivative f(x) of the cabinet temperature TC over 3 minutes.

[0022]

[0023] t is taken as 3 minutes; if f(x) is greater than N, it indicates that the TC temperature does not change much, and the limit is maintained; if f(x) is less than N, the cabinet temperature drops significantly, the liquid pump frequency is reduced, and the load operation is carried out by rounding up TC / A*ΔT / D), and the cabinet outlet temperature is monitored. The value of C is in the range of 3-8℃, and the value of this invention patent is 5℃.

[0024] As a preferred option, if B < TC < A, and if D < ΔT < C, then the first derivative f(x) of the temperature TC inside the cabinet over 3 minutes should be further measured.

[0025]

[0026] t is taken as 3 minutes; if f(x) is greater than N, it indicates that the TC temperature change is not significant, and the limit is maintained; if f(x) is less than N, the cabinet temperature drops significantly, the liquid pump frequency is reduced, and the load operation is carried out by rounding up TC / A*ΔT / D), and the cabinet outlet temperature is monitored. Assuming B < TC < A, A is 42-50, and the value in this invention is 44℃; B is 30-40, and the value in this invention is 35. The value range of C is 3-8℃, and the value in this invention is 5℃; the value range of D is 1-5℃, and the value in this invention is 2℃.

[0027] As a preferred option, if B < TC < A, and if ΔT ≤ D, first increase the fan speed by 10%, and then further detect the first derivative f(x) of the cabinet temperature TC over 3 minutes.

[0028]

[0029] t is set to 3 minutes; if f(x) is greater than N, it indicates that the TC temperature change is not significant, and the limit is maintained; if f(x) is less than N, the cabinet temperature drops significantly, the liquid pump frequency is reduced, and the load operation is carried out by rounding up TC / A*ΔT / D), and the cabinet outlet temperature is monitored. The value of D ranges from 1-5℃, and the value of this invention patent is 2℃.

[0030] Preferably, if TC≤B, the pump frequency is at least 30Hz, and the first derivative f(x) of the temperature TC inside the detection cabinet within 1 minute is measured.

[0031]

[0032] t is set to 1 minute; if f(x) is greater than P, it indicates that the TC temperature change is not significant, and the fan speed decreases by 10%; if f(x) is less than P, the cabinet temperature drops significantly, the fan speed decreases by 20%, and the cabinet outlet temperature continues to be monitored. B is set to 30℃-40℃, and the value in this invention is 35℃.

[0033] The beneficial effects of this invention are: by performing heat exchange once, energy utilization is improved, heat loss during the heat exchange process is reduced, the advantages of immersion liquid cooling technology are further enhanced, construction and operating costs are reduced, and online timely detection and control of the data center is achieved through periodic detection and judgment, thereby improving the effectiveness and timely feedback of intelligent control. Attached Figure Description

[0034] Figure 1 is a flowchart of the present invention. Detailed Implementation

[0035] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0036] Example: This example describes a control method for a liquid-cooled server rack system. The system includes a liquid-cooled rack, which is connected to the input of a cooler via a liquid pump. The output of the cooler is connected to the liquid-cooled rack. The principle is as follows: The server generates heat inside the liquid-cooled rack. The cold coolant cools the server, causing its temperature to decrease. The coolant temperature rises, and the hot coolant is pumped into the cooler. The coolant circulates within the cooler, where a fan cools it down to a lower temperature before returning it to the liquid-cooled rack, thus completing the cycle.

[0037] As shown in Figure 1, the control method includes

[0038] 1. Detect the outlet temperature TC of the liquid-cooled cabinet;

[0039] 2.1 Assuming TC≥AA takes a value of 42-50, this invention takes a value of 44℃;

[0040] 2.1.1 At this time, the liquid pump operates at a maximum frequency of 50Hz, and the dry cooler operates at full load;

[0041] 2.1.2 Detect the temperature difference ΔT between the inlet and outlet liquids of the dry cooler.

[0042] If ΔT ≥ C (C ranges from 3-8℃, and this invention uses 5℃), further detect the first derivative f(x) of the cabinet temperature TC within 1 minute, where f(x) < M, M ranges from 0 to (-0.1), and F(x) = (TCn-TCn-1) / t, where t is 1 minute. If it is greater than M, it indicates that the cooling of TC is not significant, and the heat dissipation load needs to be further increased, i.e., start the backup dry cooler and run it at a load of (TC / A*C / ΔT-1)*10% rounded up. If it is less than M, it indicates that the cooling is significant, and the cabinet outlet temperature should continue to be detected.

[0043] If ΔT≤D (D ranges from 1-5℃, and this invention uses 2℃), further detect the first derivative f(x) of the cabinet temperature TC within 1 minute, where f(x) < M, M ranges from 0 to (-0.1), and F(x) = (TCn-TCn-1) / t, where t is 1 minute. If it is greater than M, it indicates that the cooling of TC is not significant, and the heat dissipation load needs to be further increased, i.e., start the backup dry cooler and run it at a load of (TC / A*C / ΔT-1)*30% rounded up. If it is less than M, it indicates that the cooling is significant, and the cabinet outlet temperature should be monitored.

[0044] If D < ΔT < C, further check the first derivative f(x) of the cabinet temperature TC within 1 minute, where f(x) < M, M ranges from 0 to (-0.1), and F(x) = (TCn - TCn-1) / t, where t is 1 minute. If it is greater than M, it indicates that the cooling of TC is not significant, and the heat dissipation load needs to be further increased, i.e., start the backup dry cooler and run it at a load of (TC / A*C / ΔT-1)*20% rounded up. If it is less than M, it indicates that the cooling is significant, and continue to check the cabinet outlet temperature.

[0045] 2.2 Assume B < TC < A, where A is 42-50 (44℃ in this invention), and B is 30-40 (35℃ in this invention).

[0046] 2.2.1 Detect the temperature difference ΔT between the inlet and outlet liquids of the dry cooler.

[0047] If ΔT ≥ C (C ranges from 3-8℃, and this invention patent uses 5℃), first reduce the fan speed by 10%, then further detect the first derivative f(x) of the cabinet temperature TC within 3 minutes, where f(x) < N, and N ranges from 0 to (-0.05). F(x) = (TCn - TCn-1) / t, where t is 3 minutes. If it is greater than N, it indicates that the TC temperature change is not significant, and the limit is maintained. If it is less than N, the cabinet temperature drops significantly, and the liquid pump frequency is reduced to the integer load of TC / A*ΔT / D, and the cabinet outlet temperature is continuously monitored.

[0048] If D < ΔT < C, then further detect the first derivative f(x) of the cabinet temperature TC within 3 minutes, where f(x) < N, and N ranges from 0 to (-0.05). F(x) = (TCn - TCn-1) / t, where t is 3 minutes. If it is greater than N, it indicates that the TC temperature does not change much and the limit is maintained. If it is less than N, the cabinet temperature drops significantly, so reduce the pump frequency (TC / A*ΔT / D) and run at the load, and continue to detect the cabinet outlet temperature.

[0049] If ΔT≤D, first increase the fan speed by 10%, then further detect the first derivative of the cabinet temperature TC within 3 minutes: f(x) < N, where N ranges from 0 to (-0.05), F(x) = (TCn-TCn-1) / t, where t is 3 minutes. If it is greater than N, it indicates that the TC temperature change is not significant, and the limit should be maintained. If it is less than N, the cabinet temperature drops significantly, so reduce the liquid pump frequency (TC / A*ΔT / D) and run it under load, and continue to detect the cabinet outlet temperature.

[0050] 2.3TC≤B, where B takes values ​​of 30-40, and in this invention, it takes the value 35;

[0051] 2.3.1 The pump frequency is a minimum of 30Hz.

[0052] 2.3.2 Detect the first derivative f(x) of the cabinet temperature TC within 1 minute, where f(x) < P, and P ranges from 0.1 to (-0.01). F(x) = (TCn - TCn-1) / t, where t is 1 minute. If f(x) is greater than P, it indicates that the TC temperature has not changed much, and the fan speed decreases by 10%. If f(x) is less than P, the cabinet temperature drops significantly, and the fan speed decreases by 20%. Continue to detect the cabinet outlet temperature.

[0053] This application employs a single heat exchange process to improve heat exchange efficiency. Intelligent control is achieved through the temperature inside the cabinet and the temperature difference between the cabinet and the dry cooler, reducing control complexity and improving heat dissipation efficiency and response time. By determining the temperature threshold inside the cabinet and the first derivative of the cabinet temperature, combined with the determination of the temperature difference between the inlet and outlet of the dry cooler, precise identification of equipment load and cabinet heat dissipation is achieved. Intelligent prediction is performed by assuming preset operating conditions under different scenarios.

[0054] By using the temperature difference threshold of the dry cooler, the heat dissipation of the dry cooler can be determined; by using the different temperature thresholds inside the cabinet, the load inside the cabinet can be determined. With one heat exchange, the server load and the heat dissipation of the dry cooler are matched one by one, which improves the accuracy of the determination; the ambient temperature is eliminated, making the operation more intelligent and more stable.

Claims

1. A control method for a liquid-cooled cabinet system, the system comprising a liquid-cooled cabinet, the liquid-cooled cabinet being connected to the input terminal of a dry cooler via a liquid pump, and the output terminal of the dry cooler being connected to the liquid-cooled cabinet, characterized in that, Includes the following steps: S1 sets the threshold values ​​for various parameters of the liquid-cooled cabinet system; S2 detects the liquid-cooled cabinet outlet temperature TC; S3 detects and controls the temperature difference ∆T between the inlet and outlet liquids of the dry cooler at the liquid-cooled cabinet outlet temperature TC; if ∆T ≥ TC, further detects the first derivative of the cabinet temperature TC over 1 minute. ,like If the value is greater than M, activate the standby dry cooler; like If the temperature is less than M, continue monitoring the cabinet outlet temperature.

2. The control method for a liquid-cooled cabinet system according to claim 1, characterized in that, The parameter thresholds include: A ranging from 42℃ to 50℃, B ranging from 30℃ to 40℃, C ranging from 3℃ to 8℃, D ranging from 1℃ to 5℃ and D < C, M ranging from 0 to -0.1, N ranging from 0 to -0.05, and P ranging from 0.1 to -0.

01.

3. The control method for a liquid-cooled cabinet system according to claim 2, characterized in that, In step S2, if TC≥A, the liquid pump frequency operates at a maximum of 50Hz, and the dry cooler operates at full load.

4. The control method for a liquid-cooled cabinet system according to claim 3, characterized in that, In step S3, if ∆T≤D, the first derivative of the cabinet temperature TC over 1 minute is further detected. ， ; t takes a value of 1 minute; like A value greater than M indicates that TC is not significantly reducing the temperature, and it is necessary to further increase the heat dissipation load, i.e., to activate the backup dry cooler. Rounding down the load; if If the temperature is less than M, it indicates a significant cooling effect; continue monitoring the rack outlet temperature.

5. The control method for a liquid-cooled cabinet system according to claim 3, characterized in that, In step S3, if D < ∆T < C, the first derivative of the cabinet temperature TC over 1 minute is further detected. ， ; t takes a value of 1 minute; like A value greater than M indicates that TC is not significantly reducing the temperature, and it is necessary to further increase the heat dissipation load, i.e., to activate the backup dry cooler. Rounding down the load; if If the temperature is less than M, it indicates a significant cooling effect; continue monitoring the rack outlet temperature.

6. The control method for a liquid-cooled cabinet system according to claim 2, characterized in that, If B < TC < A, and if ∆T ≥ C, first reduce the fan speed by 10%, then further measure the first derivative of the cabinet temperature TC over 3 minutes. , ； t takes a value of 3 minutes; if If the value is greater than N, it indicates that the temperature change of TC is not significant, and the limit should be maintained; if If the value is less than N, the cabinet temperature will drop significantly, thus reducing the liquid pump frequency. Run the load at the rounded end and continue monitoring the cabinet outlet temperature.

7. The control method for a liquid-cooled cabinet system according to claim 2, characterized in that, If B < TC < A, and if D < ∆T < C, further detect the first derivative of the temperature TC inside the cabinet over 3 minutes. , ； t takes a value of 3 minutes; if If the value is greater than N, it indicates that the temperature change of TC is not significant, and the limit should be maintained; if If the value is less than N, the cabinet temperature will drop significantly, thus reducing the liquid pump frequency. Run the load at the rounded end and continue monitoring the cabinet outlet temperature.

8. The control method for a liquid-cooled cabinet system according to claim 2, characterized in that, If B < TC < A, and if ∆T ≤ D, first increase the fan speed by 10%, then further detect the first derivative f(x) of the cabinet temperature TC over 3 minutes. ; t takes a value of 3 minutes; if If the value is greater than N, it indicates that the temperature change of TC is not significant, and the limit should be maintained; if If the value is less than N, the cabinet temperature will drop significantly, thus reducing the liquid pump frequency. Run the load at the rounded end and continue monitoring the cabinet outlet temperature.

9. A control method for a liquid-cooled cabinet system according to claim 2, characterized in that, If TC≤B, the pump frequency is a minimum of 30Hz, and the first derivative of the temperature TC inside the detection cabinet within 1 minute is measured. ， ; t takes a value of 1 minute; like A value greater than P indicates that the temperature change in TC is not significant, and the fan speed decreases by 10%. like If the value is less than P, the cabinet temperature drops significantly, the fan speed decreases by 20%, and the cabinet outlet temperature continues to be monitored.

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