Data center double-pump refrigeration switching method

Abstract

The invention discloses a data center double-pump refrigeration switching method which comprises the steps that S1, a controller controls a first pump to operate at rated power, so that a cooling medium in a first circulation pipeline is in a working state, and meanwhile, a second pump is controlled to stop, so that a cooling medium in a second circulation pipeline is in a standby state; wherein the first circulation pipeline and the second circulation pipeline both comprise heat exchange pipeline areas of a heating area of the thermal coupling data center; and S2, the monitoring assembly monitors the operation parameters of the first pump in real time, and when the operation parameters of the first pump reach a preset switching threshold value, a switching instruction is triggered. Through linear synchronous switching of double-pump power, flow fluctuation is avoided, water hammer impact is reduced, and meanwhile continuous cooling of a heating area of the data center is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, and particularly relates to a data center double-pump refrigeration switching method. BACKGROUND

[0002] During the operation of a data center, the heat generating equipment needs to be continuously and stably cooled, and the existing data center cooling system usually adopts a single-pump driving cooling medium circulation mode to realize refrigeration. However, when the single pump is started, the medium flow rate suddenly changes from a static state, which easily causes a water hammer effect, resulting in a sudden rise and fall of the pressure in the pipeline. Not only does this cause impact damage to the circulating pipeline and heat exchange components, shortening the service life of the equipment, but also the pressure fluctuation may cause unstable flow of the cooling medium, affecting the heat exchange efficiency and making it difficult to meet the long-term stable operation requirements of the data center refrigeration system. SUMMARY

[0003] In order to solve the technical problems in the background art, the present application provides a data center double-pump refrigeration switching method.

[0004] The data center double-pump refrigeration switching method provided by the present application comprises the following steps: S1, a controller controls a first pump to operate at a rated power, so that the cooling medium in a first circulating pipeline is in a working state, and simultaneously controls a second pump to be stopped, so that the cooling medium in a second circulating pipeline is in a standby state; wherein the first circulating pipeline and the second circulating pipeline both comprise a heat exchange pipeline area that is thermally coupled to a heat generating area of a data center; S2, a monitoring assembly monitors the operating parameters of the first pump in real time, and when the operating parameters of the first pump reach a predetermined switching threshold, a switching instruction is triggered; S3, the controller responds to the switching instruction, linearly reduces the operating power of the first pump to zero at a first predetermined rate, and simultaneously linearly increases the operating power of the second pump from zero to a rated power at a second predetermined rate to complete the switching of the double-pump operating state.

[0005] Preferably, in step S2, the operating parameters of the first pump include real-time flow rate, real-time pressure and real-time temperature, and the predetermined switching threshold of the first pump is that the real-time flow rate is lower than 85% of the rated flow rate, or the real-time pressure fluctuation exceeds 10%, or the real-time temperature exceeds 90°C.

[0006] Preferably, in step S3, the controller linearly reduces the first pump to zero at a first predetermined rate of 5 Hz / s, and simultaneously controls the second pump to linearly increase from zero to a rated power at a second predetermined rate of 5 Hz / s.

[0007] Preferably, the first circulation pipeline and the second circulation pipeline share the same heat exchange pipeline area; a flow distribution valve is arranged at the medium inlet of the heat exchange pipeline area; during the switching process of step S3, the controller performs dynamic flow distribution control by taking the real-time flow output of the first pump and the real-time flow output of the second pump as control inputs, and adjusting the required opening degree of the flow distribution valve, so that the total flow into the heat exchange pipeline area is kept stable to suppress turbulence.

[0008] Preferably, the heat exchange pipeline area contained in the first circulation pipeline is a first heat exchange pipeline area, and the heat exchange pipeline area contained in the second circulation pipeline is a second heat exchange pipeline area.

[0009] Preferably, S2 further comprises: based on the real-time temperature distribution data of the data center heat generation area collected by the monitoring assembly, in combination with the flow of the first heat exchange pipeline area and the temperature difference between the inlet and outlet, calculating the difference between the current cold supply and the target cold demand; when the first pump is running at rated power, if the cold demand difference value continuously exceeds the set threshold for a predetermined time, a cold gap value is generated and a synchronous running instruction is triggered; S3 further comprises: the controller responds to the synchronous running instruction and linearly increases the running power of the second pump from zero to a target compensation power at a third predetermined rate under the premise of maintaining the rated power of the first pump, and the target compensation power is dynamically calculated according to the cold gap value and does not exceed the rated power of the second pump.

[0010] Preferably, when the second pump runs at the target compensation power for more than a preset time, the following operations are performed: the controller recalculates the total demand cold based on the current cold demand difference value; determines a leveling power value of the double-pump equal-power operation according to the total demand cold; linearly reduces the running power of the first pump from the rated power to the leveling power value; and simultaneously linearly increases the running power of the second pump from the target compensation power to the leveling power value.

[0011] The data center double-pump refrigeration switching method has the following advantages: 1. The double-pump power can be linearly and synchronously switched to avoid flow fluctuation, reduce water hammer impact, prolong the service life of the pump set, ensure continuous cooling of the data center heat generation area, maintain the stability of the total flow of the heat exchange pipeline area through dynamic regulation of the flow distribution valve, suppress turbulence, ensure that the heat exchange efficiency is not affected during the switching process, and ensure the stable operation of the data center.

[0012] 2. Smooth switching and dynamic energy compensation of the double pump can be realized to avoid refrigeration interruption during single-pump switching or energy compensation, ensure the stability of the temperature of the data center heat generation area, meet the equipment operation environment requirements, flexibly adjust the running state of the double pump according to the cold demand, reduce energy waste, and improve the effectiveness of refrigeration coverage through complementary pipeline layout. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 FIG. 1 is a schematic diagram of an embodiment one of a data center dual-pump refrigeration switching method according to the present application; Figure 2 FIG. 2 is a schematic diagram of an embodiment two of a data center dual-pump refrigeration switching method according to the present application. DETAILED DESCRIPTION

[0014] Embodiment one

[0015] Reference Figure 1 The present application provides a data center dual-pump refrigeration switching method, comprising: S1, the controller controls the first pump 1 to run at rated power, so that the cooling medium in the first circulating pipeline is in working state, and controls the second pump 2 to stop running, so that the cooling medium in the second circulating pipeline is in standby state; wherein the first circulating pipeline and the second circulating pipeline both contain heat exchange pipeline area of the heat coupling data center 3 heat generation area.

[0016] S2, the monitoring component monitors the operating parameters of the first pump 1 in real time, and triggers the switching instruction when the operating parameters of the first pump 1 reach the predetermined switching threshold; wherein the operating parameters of the first pump 1 include real-time flow, real-time pressure and real-time temperature, and the predetermined switching threshold of the first pump 1 is that the real-time flow is lower than 85% of the rated flow or the real-time pressure fluctuation is more than 10% or the real-time temperature is more than 90°C.

[0017] S3, the controller responds to the switching instruction, linearly reduces the running power of the first pump 1 to zero at a first predetermined rate, and synchronously linearly increases the running power of the second pump 2 from zero power to rated power at a second predetermined rate to complete the dual-pump running state switching; wherein the controller controls the first pump 1 to linearly reduce to zero at a first predetermined rate of 5 Hz / s, and synchronously controls the second pump 2 to linearly increase from zero power to rated power at a second predetermined rate of 5 Hz / s.

[0018] Further, the first circulating pipeline and the second circulating pipeline share the same heat exchange pipeline area; the heat exchange pipeline area is provided with a flow distribution valve 4 at the medium inlet, and during the switching process of step S3, the controller controls the dynamic flow distribution as follows: taking the real-time flow output of the first pump 1 and the real-time flow output of the second pump 2 as control input, adjusting the required opening of the flow distribution valve 4, so as to keep the total flow into the heat exchange pipeline area stable to suppress turbulence.

[0019] In this embodiment, the continuous cooling of the heat-generating area of ​​the data center 3 is achieved by slowly switching between the first pump 1 and the second pump 2. At the same time, the operating power of the first pump 1 is slowly reduced while the operating power of the second pump 2 is slowly increased. This avoids flow fluctuations during the switching process and reduces water hammer impact caused by drastic flow fluctuations, which would reduce the lifespan of the pump set. In addition, the dynamic control of the flow distribution valve further ensures the stability of the medium flow in the heat exchange pipeline area, ensuring that the heat exchange efficiency of the heat-generating area of ​​the data center 3 is not affected during the switching process, and maintaining the stability of the operating environment of the data center 3.

[0020] Example 2 refer to Figure 2 The present invention proposes a dual-pump cooling switching method for data centers, comprising: S1: The controller controls the first pump 1 to operate at its rated power, keeping the cooling medium in the first circulation pipeline in a working state, while simultaneously controlling the second pump 2 to stop, keeping the cooling medium in the second circulation pipeline in a standby state. Both the first and second circulation pipelines include heat exchange pipe areas for the heat-generating zone of the thermally coupled data center 3. The heat exchange pipe area of ​​the first circulation pipeline is called the first heat exchange pipe area, and the heat exchange pipe area of ​​the second circulation pipeline is called the second heat exchange pipe area.

[0021] S2: The monitoring component continuously monitors the operating parameters of the first pump 1, including real-time flow rate, real-time pressure, and real-time temperature. When the operating parameters of the first pump 1 reach a predetermined switching threshold, a switching command is triggered. The predetermined switching threshold is: Real-time traffic is less than 85% of the rated traffic. Or real-time pressure fluctuations exceeding 10%; Or the real-time temperature exceeds 90°C; In addition, S2 also includes cooling demand monitoring: Based on the real-time temperature distribution data of the heat-generating zone of data center 3 collected by the monitoring components, the difference between the current cooling supply and the target cooling demand is calculated by combining the cooling medium flow rate and the inlet and outlet temperature difference of the first heat exchange pipeline zone. When the first pump 1 is running at rated power, if the difference in cooling demand continues to exceed the set threshold for a predetermined time, a cooling gap value is generated and a synchronous operation command is triggered. S3: The operating state switching controller responds to the switching command, linearly reducing the operating power of the first pump 1 to zero at a first predetermined rate, and simultaneously linearly increasing the operating power of the second pump 2 from zero power to rated power at a second predetermined rate, so as to complete the dual pump operating state switching.

[0022] In addition, S3 also includes synchronous operation control: The controller responds to the synchronous operation command and, while maintaining the rated power operation of the first pump 1, linearly increases the operating power of the second pump 2 from zero to the target compensation power at a third predetermined rate; the target compensation power is dynamically calculated based on the cooling capacity deficit value and does not exceed the rated power of the second pump 2. When the second pump 2 continues to operate at the target compensation power for more than a preset time during dual-pump leveling operation, the following operations are performed: The controller recalculates the total cooling demand based on the current cooling demand difference, determines the leveling power value for dual-pump equal power operation based on the total cooling demand, linearly reduces the operating power of the first pump 1 from the rated power to the leveling power value, and simultaneously linearly increases the operating power of the second pump 2 from the target compensation power to the leveling power value.

Claims

1. A method for switching between dual-pump cooling in a data center, characterized in that, include: S1. The controller controls the first pump (1) to operate at rated power, so that the cooling medium in the first circulation pipeline (11) is in working state, and at the same time controls the second pump (2) to stop, so that the cooling medium in the second circulation pipeline (21) is in standby state; wherein, the first circulation pipeline (11) and the second circulation pipeline (21) both contain the heat exchange pipeline area of ​​the heat-generating area of ​​the thermally coupled data center (3); S2. The monitoring component monitors the operating parameters of the first pump (1) in real time. When the operating parameters of the first pump (1) reach the predetermined switching threshold, a switching command is triggered. S3. The controller responds to the switching command and linearly reduces the operating power of the first pump (1) to zero at a first predetermined rate, and simultaneously linearly increases the operating power of the second pump (2) from zero power to rated power at a second predetermined rate to complete the switching of the dual pump operating state.

2. The data center dual-pump cooling switching method as described in claim 1, characterized in that, In step S2, the operating parameters of the first pump (1) include real-time flow rate, real-time pressure and real-time temperature. The predetermined switching threshold of the first pump (1) is that the real-time flow rate is lower than 85% of the rated flow rate or the real-time pressure fluctuation exceeds 10% or the real-time temperature exceeds 90°C.

3. The data center dual-pump cooling switching method as described in claim 2, characterized in that, In step S3, the controller controls the first pump (1) to linearly decrease to zero at a first predetermined rate of 5 Hz / second, and synchronously controls the second pump (2) to linearly increase from zero power to rated power at a second predetermined rate of 5 Hz / second.

4. The data center dual-pump cooling switching method as described in claim 1, characterized in that, The first circulation pipeline (11) and the second circulation pipeline (21) share the same heat exchange pipeline area; a flow distribution valve (4) is provided at the medium inlet of the heat exchange pipeline area. During the switching process in step S3, the controller performs dynamic flow distribution control in the following way: using the real-time flow output of the first pump (1) and the real-time flow output of the second pump (2) as control inputs, the required opening degree of the flow distribution valve (4) is adjusted so that the total flow into the heat exchange pipeline area remains stable to suppress turbulence.

5. The data center dual-pump cooling switching method as described in claim 1, characterized in that, The heat exchange pipe area included in the first circulation pipe (11) is the first heat exchange pipe area (111), and the heat exchange pipe area included in the second circulation pipe (21) is the second heat exchange pipe area (211).

6. The data center dual-pump cooling switching method as described in claim 5, characterized in that, S2 also includes: based on the real-time temperature distribution data of the heat-generating area of ​​the data center (3) collected by the monitoring component, combined with the cooling medium flow rate and inlet-outlet temperature difference of the first heat exchange pipe area (111), calculating the difference between the current cooling supply and the target cooling demand; when the first pump (1) is running at rated power, if the difference in cooling demand continues to exceed the set threshold for a predetermined time, a cooling gap value is generated and a synchronous operation command is triggered. S3 further includes: the controller responds to the synchronous operation command and, while maintaining the rated power operation of the first pump (1), linearly increases the operating power of the second pump (2) from zero to the target compensation power at a third predetermined rate, wherein the target compensation power is dynamically calculated based on the cooling capacity deficit value and does not exceed the rated power of the second pump (2).

7. The data center dual-pump cooling switching method as described in claim 6, characterized in that, When the second pump (2) continues to operate at the target compensation power for more than a preset time, the following operations are performed: the controller recalculates the total demand cooling capacity based on the current cooling demand difference; determines the leveling power value for the two pumps to operate at equal power based on the total demand cooling capacity; linearly reduces the operating power of the first pump (1) from the rated power to the leveling power value; and simultaneously linearly increases the operating power of the second pump (2) from the target compensation power to the leveling power value.

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