Liquid cooling system energy-saving control method and device, liquid cooling system and medium

Abstract

This invention discloses an energy-saving control method, device, liquid cooling system, and medium for a liquid cooling system. The method includes: acquiring the secondary side temperature in a secondary side liquid supply pipeline carrying heat energy to be dissipated; determining the magnitude of the secondary side temperature and a target control temperature; if the secondary side temperature is lower than the target control temperature, sequentially controlling the primary side circulation pump and primary side valve in the primary liquid supply pipeline to reduce the cooling capacity of the primary side liquid supply pipeline; if the secondary side temperature is higher than the target control temperature, sequentially controlling the primary side valve and primary side circulation pump to increase the cooling capacity of the primary side liquid supply pipeline. During the adjustment of the cooling capacity supply, maintaining low fluid resistance in the liquid cooling system is a prerequisite for adjusting the primary side circulation pump. By linking the primary side valve and the primary side circulation pump, the overall operation of the liquid cooling system is ensured to be within the optimal energy efficiency range.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology, and in particular to an energy-saving control method, device, liquid cooling system, and computer-readable storage medium for a liquid cooling system. Background Technology

[0002] Currently, there are more and more occasions that require the use of large-scale liquid cooling systems for heat dissipation. For example, with the booming development of information technologies such as big data, the Internet and cloud computing, data centers, as an essential infrastructure for information technology, are gradually developing towards large-scale and high-density, and the problem of server heat generation in data centers is becoming more and more prominent.

[0003] To address the heat generation issue, many data center server rooms currently employ liquid cooling systems to dissipate heat from servers. These systems typically include electrically controlled valves and circulating pumps. By controlling the opening of the electrically controlled valves, the liquid flow rate can be adjusted, and the size of the opening affects the fluid resistance within the liquid cooling system. The adjustments of the electrically controlled valves and the circulating pumps are relatively independent. Therefore, to achieve the same heat exchange effect, the circulating pumps may operate in a high-efficiency mode for extended periods, leading to high overall energy consumption of the liquid cooling system. Summary of the Invention

[0004] To address the existing technical problems, embodiments of the present invention provide an energy-saving control method, apparatus, liquid cooling system, and computer-readable storage medium for liquid cooling systems that effectively reduce overall system energy consumption.

[0005] The technical solution of this invention is implemented as follows:

[0006] Firstly, an energy-saving control method for a liquid cooling system includes:

[0007] Obtain the secondary side temperature in the secondary side liquid supply pipeline that carries the heat energy to be dissipated;

[0008] Determine the magnitude of the secondary side temperature and the target control temperature;

[0009] If the secondary side temperature is lower than the target control temperature, the primary side circulation pump and primary side valve in the primary liquid supply pipeline that provides cooling capacity are controlled in sequence to reduce the cooling capacity of the primary side liquid supply pipeline.

[0010] If the secondary side temperature is greater than the target control temperature, the primary side valve and the primary side circulation pump are controlled sequentially to increase the cooling capacity of the primary side liquid supply pipeline.

[0011] Secondly, an energy-saving control device for a liquid cooling system is also provided, comprising:

[0012] The acquisition module acquires the secondary side temperature in the secondary side liquid supply pipeline carrying the heat energy to be dissipated.

[0013] The judgment module is used to determine the magnitude of the secondary side temperature and the target control temperature;

[0014] The control module is configured to, if the secondary side temperature is lower than the target control temperature, sequentially control the primary side circulation pump and the primary side valve in the primary liquid supply pipeline that provides cooling capacity, so as to reduce the cooling capacity of the primary side liquid supply pipeline; and if the secondary side temperature is higher than the target control temperature, sequentially control the primary side valve and the primary side circulation pump, so as to increase the cooling capacity of the primary side liquid supply pipeline.

[0015] Thirdly, a liquid cooling system is provided, including a primary side liquid supply pipeline for providing cooling capacity, a secondary side liquid supply pipeline deployed on the side to be cooled, and a controller. The primary side liquid supply pipeline is provided with a primary side valve and a primary side circulation pump, and the controller is connected to the primary side valve and the primary side circulation pump.

[0016] The controller is used to execute a computer program to implement the energy-saving control method for the liquid cooling system described in any embodiment of this application.

[0017] Fourthly, a computer-readable storage medium is provided, storing a computer program that, when executed by a processor, causes the processor to perform the energy-saving control method for a liquid cooling system according to any embodiment of this application.

[0018] The energy-saving control method for a liquid cooling system provided in the above embodiments of this application reduces the supply of cooling capacity in the liquid cooling system by sequentially controlling the primary-side circulation pump and the primary-side valve when the secondary side temperature is lower than the target control temperature. Thus, when it is necessary to reduce the supply of cooling capacity in the liquid cooling system, the primary-side circulation pump is adjusted before controlling the primary-side valve. This process ensures that the fluid resistance in the liquid cooling system is kept low, thereby effectively improving the energy efficiency of the primary-side circulation pump. Conversely, when the secondary side temperature is higher than the target control temperature, the supply of cooling capacity in the liquid cooling system is increased by sequentially controlling the primary-side valve and the primary-side circulation pump. Similarly, when it is necessary to increase the supply of cooling capacity in the liquid cooling system, the primary-side valve is adjusted before controlling the primary-side circulation pump. This process also ensures that the fluid resistance in the liquid cooling system is kept low, thereby effectively improving the energy efficiency of the primary-side circulation pump. By linking the primary-side valve and the primary-side circulation pump, the overall operation of the liquid cooling system is ensured to be within the optimal energy efficiency range, thereby achieving effective energy saving and improving system stability.

[0019] The liquid cooling system energy-saving control device, liquid cooling system, and computer-readable storage medium provided in the above embodiments belong to the same concept as the corresponding liquid cooling system energy-saving control method embodiments, and thus have the same technical effects as the corresponding liquid cooling system energy-saving control method embodiments, which will not be repeated here. Attached Figure Description

[0020] Figure 1 This is a system architecture diagram of an optional application scenario for the energy-saving control method of a liquid cooling system in one embodiment;

[0021] Figure 2 This is a flowchart of an energy-saving control method for a liquid cooling system in one embodiment;

[0022] Figure 3 This is a schematic diagram of the structure of an energy-saving control device for a liquid cooling system in one embodiment;

[0023] Figure 4 This is a schematic diagram of the liquid cooling system in one embodiment;

[0024] Figure 5 This is a flowchart of an energy-saving control method for a liquid cooling system, as shown in an optional specific example. Detailed Implementation

[0025] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] In the following description, the expression “some embodiments” refers to a subset of all possible embodiments. However, it should be understood that “some embodiments” can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0028] Please see Figure 1This is a system architecture diagram of an optional application scenario for the energy-saving control method for a liquid cooling system provided in this application embodiment. The energy-saving control method can be applied to a liquid cooling system, which includes a secondary-side liquid supply pipeline 51 deployed on the side to be cooled, a primary-side liquid supply pipeline 53 for providing cooling capacity, a heat exchanger 54 connecting the secondary-side liquid supply pipeline 51 and the primary-side liquid supply pipeline 53 for heat exchange, and a controller 55. The side to be cooled can refer to a data center server room. When the liquid in the secondary-side liquid supply pipeline 51 flows through the servers in the data center server room, it carries away the heat generated by the servers. The liquid carrying heat from the server in the secondary-side liquid supply line 51 flows towards the primary-side liquid supply line 53, where it transfers heat to the primary-side liquid supply line 53 at the heat exchanger 54 before flowing back to the server. Simultaneously, the liquid in the primary-side liquid supply line 53, after receiving heat from the secondary-side liquid supply line 51 at the heat exchanger 54, flows to the cooling section 531 in the primary-side liquid supply line 53 to release heat, and then the coolant flows back to the heat exchanger 54. Thus, the heat generated by the server is promptly delivered to the heat exchanger 54 via the secondary-side liquid supply line 51, and after heat exchange, the heat is transferred to the primary-side liquid supply line 53 for timely release, and this cycle repeats. A valve 534 is installed in the primary-side liquid supply line 53, and the liquid flow rate in the primary-side liquid supply line 53 can be adjusted by regulating the opening of the valve 534. A pump 533 is also installed in the primary-side liquid supply line 53, and changes in the pump frequency can adjust the liquid supply volume of the primary-side liquid supply line 53. The controller 55 monitors the temperature of the secondary side liquid supply line 51 in real time and dynamically adjusts the frequency of the pump 533 and the opening of the valve 534 in the primary side liquid supply line 53 to ensure that the liquid cooling system operates in the optimal energy efficiency range while meeting the cooling requirements, so as to achieve effective energy saving and improve system stability.

[0029] In the primary side liquid supply pipeline 53, a fan 532 is installed in the cooling section 531. The speed of the fan 532 can adjust the efficiency of the cooling section 531 in releasing heat to the outside. The controller 55 performs linkage control on the valve 534 and pump 533 in the primary side liquid supply pipeline to regulate and control the cooling supply of the liquid cooling system. In the process, it can also further perform linkage control on the fan 532 to improve the energy efficiency of the pump 533 and keep the fan 532 operating within the energy-saving and efficiency range.

[0030] The primary-side liquid supply pipeline 53 includes a first liquid supply pipe and a first liquid return pipe connected between the heat exchanger 54 and the cooling section 531. The first liquid supply pipe is the pipe through which liquid flows from the cooling section 531 to the heat exchanger 54 after releasing heat. The first liquid return pipe is the pipe through which liquid flows from the heat exchanger 54 to the cooling section 531 after absorbing heat energy transferred from the secondary-side liquid supply pipeline 51. The secondary-side liquid supply pipeline 51 includes a second liquid supply pipe and a second liquid return pipe connected between the server and the heat exchanger 54. The second liquid supply pipe is the pipe through which liquid flows from the heat exchanger 54 to the server after transferring heat energy to the primary-side liquid supply pipeline 53. The second liquid return pipe is the pipe through which liquid flows from the server to the heat exchanger 54 after absorbing heat generated by the server.

[0031] The flow rate of the primary side supply pipe 53 typically refers to the first return flow rate in the first return pipe, which can correspondingly characterize the flow rate of the coolant flowing from the primary side supply pipe 53 to the heat exchanger 54 for heat exchange with the secondary side supply pipe 51. The flow rate of the secondary side supply pipe 51 typically refers to the second return flow rate in the second return pipe, which can correspondingly characterize the flow rate of the coolant flowing through the server in the secondary side supply pipe 51 to remove heat.

[0032] In a liquid cooling system, the operating parameters of the primary-side liquid supply line 53 typically include at least one of the following: the first liquid supply temperature and the first liquid supply pressure of the first liquid supply line, and the first liquid return temperature and the first liquid return pressure of the first liquid return line; the operating parameters of the secondary-side liquid supply line 51 typically include at least one of the following: the second liquid supply temperature and the second liquid supply pressure of the second liquid supply line, and the second liquid return temperature and the second liquid return pressure of the second liquid return line. In this embodiment, the primary-side temperature can refer to either the first liquid supply temperature or the first liquid return temperature, and the secondary-side temperature can refer to either the second liquid supply temperature or the second liquid return temperature.

[0033] Please see Figure 2 The energy-saving control method for a liquid cooling system provided in one embodiment of this application can be applied to... Figure 1 The controller shown, the energy-saving control method for the liquid cooling system includes the following steps:

[0034] S101, Obtain the secondary side temperature in the secondary side liquid supply pipeline carrying the heat energy to be dissipated;

[0035] S103, determine the magnitude of the secondary side temperature and the target control temperature;

[0036] S105, if the secondary side temperature is lower than the target control temperature, the primary side circulation pump and primary side valve in the primary liquid supply pipeline that provides cooling capacity are controlled in sequence to reduce the cooling capacity of the primary side liquid supply pipeline.

[0037] S107, if the secondary side temperature is greater than the target control temperature, the primary side valve and the primary side circulation pump are controlled in sequence to increase the cooling capacity of the primary side liquid supply pipeline.

[0038] The liquid cooling system consists of two parts: a primary-side supply line and a secondary-side supply line. The secondary-side supply line is located on the side to be cooled. As the coolant flows through this side, it carries the heat generated there to the primary-side supply line. The primary-side supply line then absorbs and releases the heat transferred from the secondary-side supply line, achieving timely heat dissipation. Optionally, a first temperature sensor is installed in the primary-side supply line, and a second temperature sensor is installed in the secondary-side supply line. The controller receives the real-time primary-side temperature from the first sensor and the real-time secondary-side temperature from the second sensor, enabling real-time monitoring of the temperatures of both the primary and secondary-side supply lines. Optionally, in this embodiment of the application, the linkage control of the primary valve and the primary circulation pump in the primary liquid supply pipeline is achieved by whether the cooling capacity supply of the liquid cooling system meets the demand. Alternatively, a second temperature sensor may be installed only in the secondary liquid supply pipeline. The controller receives the secondary temperature collected in real time by the second temperature sensor to monitor the temperature of the secondary liquid supply pipeline in real time, thereby determining whether the cooling capacity supply of the liquid cooling system meets the demand.

[0039] The controller monitors the secondary side temperature in real time. When the secondary side temperature is higher than the target control temperature, it indicates that there is a certain redundancy in the cooling supply of the liquid cooling system. The primary side circulation pump and the primary side valve are controlled sequentially. Before reducing the cooling supply of the liquid cooling system by controlling the primary side circulation pump, the current opening of the primary side valve is kept unchanged to keep the fluid resistance in the liquid cooling system low. This is a prerequisite for adjusting the primary side circulation pump, which effectively improves the energy efficiency of the primary side circulation pump. If the adjustment of the cooling supply can be completed by adjusting and controlling the primary side circulation pump, the liquid cooling system can achieve a heat exchange effect that matches the current cooling supply demand while keeping the flow resistance in the primary side liquid supply pipeline to a minimum, thereby greatly improving the energy efficiency of the primary side circulation pump.

[0040] When the secondary side temperature is lower than the target control temperature, it indicates that the cooling supply in the liquid cooling system is insufficient. The primary side valve and the primary side circulation pump are then controlled sequentially. Before increasing the cooling supply by controlling the primary side circulation pump, the opening of the primary side valve is adjusted to maintain low fluid resistance in the liquid cooling system. This is a prerequisite for adjusting the primary side circulation pump, effectively improving its energy efficiency. If adjusting the cooling supply to the primary side liquid supply line is sufficient to adjust the cooling supply, the liquid cooling system can maintain minimal flow resistance in the primary side liquid supply line while matching the current cooling supply demand, thus achieving a heat exchange effect that matches the current cooling supply demand. By improving the energy efficiency of the primary side circulation pump while achieving the same heat exchange effect, the overall energy efficiency of the liquid cooling system can be improved.

[0041] The target control temperature can refer to the temperature value set by the user based on heat dissipation requirements, or it can refer to the ambient temperature required for the equipment generating heat to maintain normal operation. It should be noted that the target control temperature can be a single value or a range of values.

[0042] In the above embodiment, the controller monitors the temperature in the secondary side liquid supply pipeline in real time. When the secondary side temperature is lower than the target control temperature, the cooling capacity supply to the liquid cooling system is reduced by sequentially controlling the primary side circulation pump and the primary side valve. Thus, when it is necessary to reduce the cooling capacity supply to the liquid cooling system, the primary side circulation pump is adjusted before controlling the primary side valve. This ensures that the fluid resistance in the liquid cooling system is kept low, effectively improving the energy efficiency of the primary side circulation pump. When the secondary side temperature is higher than the target control temperature... The cooling capacity supply in the liquid cooling system is increased by sequentially controlling the primary side valve and the primary side circulation pump. Thus, when an increase in the cooling capacity supply in the liquid cooling system is needed, the primary side valve is adjusted and controlled before controlling the primary side circulation pump. In this process, the adjustment of the primary side circulation pump is also based on the premise of keeping the fluid resistance in the liquid cooling system low, so as to effectively improve the energy efficiency of the primary side circulation pump. By linking the control of the primary side valve and the primary side circulation pump, the overall operation of the liquid cooling system is ensured to be within the optimal energy efficiency range, so as to achieve effective energy saving and improve system stability.

[0043] In some embodiments, if the secondary side temperature is greater than the target control temperature, the primary side circulation pump and primary side valve in the primary liquid supply pipeline that provides cooling capacity are controlled sequentially to reduce the cooling capacity of the primary side liquid supply pipeline, including:

[0044] If the secondary side temperature is lower than the target control temperature, the differential pressure target value of the primary side circulation pump in the primary liquid supply pipeline that provides cooling capacity is reduced until the differential pressure target value of the primary side circulation pump is reduced to the initial value. Then, the opening degree of the primary side valve in the primary liquid supply pipeline is reduced to reduce the cooling capacity of the primary side liquid supply pipeline.

[0045] The differential pressure target value is one of the operating parameters for controlling the working state of the primary-side circulation pump. This target value can be achieved by adjusting the speed of the primary-side circulation pump. In this embodiment, when the secondary-side temperature is lower than the target control temperature, it indicates that there is a certain redundancy in the cooling supply of the liquid cooling system. In this case, the primary-side circulation pump is adjusted first, reducing its speed to correspondingly reduce the differential pressure target value. Optionally, the initial value of the differential pressure target value can correspond to the minimum speed of the primary side circulation pump. When reducing the cooling supply in the liquid cooling system by controlling the primary side circulation pump, the current opening of the primary side valve is kept unchanged. If the cooling supply can be adjusted by regulating the primary side circulation pump, the liquid cooling system can achieve a heat exchange effect that matches the current cooling supply demand while minimizing the flow resistance in the primary side liquid supply pipeline. If the secondary side temperature is still lower than the target control temperature after the speed of the primary side circulation pump is reduced to the minimum, the opening of the primary side valve is then reduced. The reduction of the opening of the primary side valve will increase the fluid resistance in the primary side liquid supply pipeline, but at the same time, it will reduce the liquid supply to a suitable range while matching the current cooling supply demand. In this way, by linking the control of the primary side valve and the primary side circulation pump, the liquid cooling system can be ensured to operate in the optimal energy efficiency range, so as to achieve effective energy saving and improve system stability.

[0046] In some embodiments, the energy-saving control method for the liquid cooling system further includes:

[0047] If the secondary side temperature is still lower than the target control temperature, the speed of the primary side fan in the primary side liquid supply pipeline is reduced and kept less than or equal to the energy-saving speed.

[0048] The cooling section of the primary-side liquid supply pipeline is equipped with a primary-side fan. Turning on the primary-side fan accelerates the heat release efficiency of the primary-side liquid supply pipeline in the cooling section; correspondingly, the higher the primary-side fan speed, the greater the heat release efficiency of the primary-side liquid supply pipeline. The energy-saving speed can refer to a specific speed value determined based on the performance parameters of the primary-side fan. When the fan speed exceeds this value, the fan's energy efficiency will significantly deteriorate. Optionally, the energy-saving speed of the primary-side fan can be determined based on the fan's performance parameter curve. In this embodiment, the controller monitors the temperature of the secondary side liquid supply pipeline in real time. Based on the secondary side temperature, it determines that there is a certain redundancy in the cooling capacity supply of the liquid cooling system. By linking the primary side valve and the primary side circulation pump to reduce the cooling capacity supply, the controller further considers the speed of the primary side fan. First, it controls the pressure difference target value of the primary side circulation pump to decrease to the initial value. Then, it controls the speed of the primary side fan in the primary side liquid supply pipeline to decrease and keep it less than or equal to the energy-saving speed. Finally, it controls the opening of the primary side valve to decrease. In this way, when the liquid cooling system aims for a certain heat exchange effect, by controlling the primary side circulation pump and the primary side fan to operate within the optimal energy efficiency range, and controlling the primary side circulation pump, the primary side fan and the primary side valve to work together to achieve the heat exchange effect, it can ensure that the liquid cooling system operates within the optimal energy efficiency range.

[0049] In some embodiments, if the secondary side temperature is greater than the target control temperature, controlling the primary side valve and the primary side circulation pump in sequence to increase the cooling capacity of the primary side liquid supply pipeline includes:

[0050] If the secondary side temperature is greater than the target control temperature, the opening degree of the primary side valve is increased until the opening degree of the primary side valve increases to the opening threshold. Then, the pressure difference target value of the primary side circulation pump is increased to increase the cooling capacity of the primary side liquid supply pipeline.

[0051] The opening threshold can refer to the maximum opening of the primary side valve. In this embodiment, when the secondary side temperature is greater than the target control temperature, it indicates that the cooling supply in the liquid cooling system is insufficient. At this time, the opening of the primary side valve is adjusted first, increasing its opening. When the liquid cooling system needs to increase cooling supply during operation, the opening of the primary side valve is increased first. If the cooling supply can be adjusted by controlling the opening of the primary side valve, then the liquid cooling system can achieve a cooling supply that matches the current cooling demand while minimizing the flow resistance in the primary side liquid supply line. The required heat exchange effect; if the secondary side temperature is still greater than the target control temperature after the opening degree of the primary side valve is increased to the opening threshold, the speed of the primary side circulation pump is adjusted to achieve the corresponding pressure difference target value. In the process of adjusting and controlling the primary side circulation pump to increase the cooling supply, the flow resistance in the primary side liquid supply pipeline is at its minimum, which can effectively improve the energy efficiency of the primary side circulation pump. In this way, by linking and controlling the primary side valve and the primary side circulation pump, the liquid cooling system is ensured to operate in the optimal energy efficiency range, so as to achieve the purpose of effective energy saving and improving system stability.

[0052] Optionally, the energy-saving control method for the liquid cooling system further includes:

[0053] If the secondary side temperature is still higher than the target control temperature, the opening degree of the secondary side valve is increased.

[0054] The heat exchanger can be equipped with a secondary side valve, and the secondary side liquid supply pipeline can be adjusted through the secondary side valve to regulate the liquid supply volume on the secondary side. In this embodiment, when the secondary side temperature is greater than the target control temperature, it indicates that the cooling capacity supply in the liquid cooling system is insufficient. When the cooling capacity supply needs to be increased during the operation of the liquid cooling system, the opening of the primary side valve is first increased. After the opening of the primary side valve is increased to the opening threshold, the speed of the primary side circulation pump is adjusted to achieve the corresponding pressure difference target value. If the secondary side temperature is still greater than the target control temperature after adjusting and controlling the primary side liquid supply pipeline, the opening of the secondary side valve of the secondary side liquid supply pipeline can be adjusted to increase the efficiency of the coolant in the secondary side liquid supply pipeline in carrying away heat from the heat-dissipating side, thereby correspondingly increasing the heat exchange efficiency between the secondary side liquid supply pipeline and the primary side liquid supply pipeline. Thus, when the liquid cooling system aims for a specific heat exchange effect, the primary side valve and the primary side circulation pump are linked and controlled to ensure that the primary side circulation pump operates within the optimal energy efficiency range. The primary side circulation pump, the primary side valve, and the secondary side valve work together to achieve the heat exchange effect, thereby improving the overall energy efficiency of the liquid cooling system while obtaining the same heat exchange effect.

[0055] Optionally, the energy-saving control method for the liquid cooling system further includes:

[0056] If the secondary side temperature is equal to the target control temperature, the primary side valve and the primary side circulation pump are controlled to maintain their current operating state.

[0057] When the secondary side temperature equals the target control temperature, it means that the cooling capacity provided by the primary side liquid supply pipeline is currently sufficient to meet the heat dissipation requirements of the side to be cooled. At this time, the primary side liquid supply pipeline can be controlled to maintain its current working state, and the primary side valve and the primary side circulation pump can be controlled to continue to work with the current working parameters.

[0058] In the above embodiments, the controller monitors the secondary side temperature in real time and determines whether the secondary side temperature meets the target control temperature to confirm that the current cooling capacity in the liquid cooling system can meet the heat dissipation requirements of the side to be cooled, thereby achieving energy saving and stability while more accurately taking into account the heat dissipation requirements.

[0059] In some embodiments, after each adjustment of the primary-side circulation pump or after each adjustment of the primary-side valve, the step of determining the magnitude of the secondary-side temperature relative to the target control temperature is returned.

[0060] The controller monitors the secondary side temperature in real time. When the secondary side temperature is higher than the target control temperature, the opening of the primary side valve is first adjusted. After each adjustment, the system returns to the judgment step of the secondary side temperature and the target control temperature. The above process can be repeated multiple times until the judgment conditions in the above process are no longer met or the primary side valve has reached the opening threshold. After the opening of the primary side valve has reached the opening threshold, if the secondary side temperature is higher than the target control temperature, the differential pressure target value of the primary side circulation pump is adjusted. Similarly, after each adjustment of the primary side circulation pump, the system returns to the judgment step of the secondary side temperature and the target control temperature. The above process can be repeated multiple times until the judgment conditions in the above process are no longer met or the primary side circulation pump has reached the differential pressure threshold. Conversely, when the secondary side temperature is lower than the target control temperature, the differential pressure target value of the primary side circulation pump is first adjusted to the initial value, and the process returns to the judgment step of the secondary side temperature and the target control temperature. After the differential pressure target value of the primary side circulation pump has been adjusted to the initial value, if the secondary side temperature is still lower than the target control temperature, the opening of the primary side valve is adjusted. After each adjustment of the primary side valve, the process returns to the judgment step of the secondary side temperature and the target control temperature. The above process can be repeated multiple times until the judgment conditions in the above process are no longer met or the opening of the primary side circulation valve has been reduced to the minimum value.

[0061] The primary valve can be adjusted in different ways. For example, the valve opening can be increased or decreased by a preset value each time, increased or decreased by a certain percentage each time, or adjusted using a PID (proportional-integral-derivative) control algorithm. In one optional example, the PID control targets the secondary side temperature, using the actual secondary side temperature as feedback for PID requirement design. Assuming the PID requirement calculation range is 0–100, when the calculated requirement is 0–50, the primary valve opening is adjusted first. The primary valve opening can be adjusted from the lower limit to the upper limit (e.g., 0 to 50 corresponds to a primary valve opening of 30%–100%). The primary-side circulation pump can be regulated in different ways. For example, the target differential pressure value can be increased or decreased by a preset amount each time, increased or decreased by a certain percentage each time, or PID (proportional-integral-derivative) control algorithm can be used. Taking PID control as an example, the PID control is set with the target value of the secondary-side temperature as the target, and the actual value of the secondary-side temperature is used as feedback for PID requirement design. Assuming the requirement calculation range is 0–100, when the PID calculation requirement is 0–50, the opening of the primary-side valve is first adjusted. The opening of the primary-side valve can be adjusted from the lower limit to the upper limit (e.g., 0 to 50 corresponds to an opening of 30%–100% of the primary-side valve). The initial speed of the primary-side circulation pump remains unchanged at the lower limit. When the PID calculation requirement is 50 to 100, the speed of the primary circulation pump is adjusted to obtain the corresponding differential pressure target value (e.g., 50 to 100, corresponding to a primary circulation pump frequency of 30Hz to 50Hz).

[0062] In the energy-saving control method for liquid cooling system provided in this application embodiment, after each adjustment of the opening degree of the primary side valve or the target differential pressure value of the primary side circulating pump, the process can return to the step of judging the magnitude of the secondary side temperature and the target control temperature. The corresponding control logic can be looped multiple times until the judgment condition in the corresponding control logic is no longer met.

[0063] In the above embodiments, the cooling capacity of the liquid cooling system is regulated and controlled through the primary side liquid supply pipeline. The primary side valve and the primary side circulation pump are linked and controlled to keep the fluid resistance in the liquid cooling system low. This is the premise for adjusting the primary side circulation pump, so that the primary side circulation pump can keep operating in the optimal energy efficiency range while obtaining the same heat exchange effect, and finally achieve the overall optimal operating energy efficiency of the liquid cooling system.

[0064] Please see Figure 3In another aspect, this application provides an energy-saving control device for a liquid cooling system, comprising: an acquisition module 551 for acquiring the secondary side temperature in a secondary side liquid supply pipeline carrying heat energy to be dissipated; a judgment module 552 for judging the magnitude of the secondary side temperature and a target control temperature; and a control module 553 for controlling, if the secondary side temperature is less than the target control temperature, sequentially controlling the primary side circulation pump and the primary side valve in the primary liquid supply pipeline that provides cooling capacity, to reduce the cooling capacity of the primary side liquid supply pipeline; and if the secondary side temperature is greater than the target control temperature, sequentially controlling the primary side valve and the primary side circulation pump, to increase the cooling capacity of the primary side liquid supply pipeline.

[0065] Optionally, the control module 553 is further configured to, if the secondary side temperature is less than the target control temperature, control the differential pressure target value of the primary side circulation pump in the primary liquid supply pipeline that provides cooling capacity to decrease until the differential pressure target value of the primary side circulation pump decreases to the initial value, and then control the opening degree of the primary side valve in the primary liquid supply pipeline to decrease, so as to reduce the cooling capacity of the primary side liquid supply pipeline.

[0066] Optionally, the control module 553 is further configured to, if the secondary side temperature is still lower than the target control temperature, control the speed of the primary side fan in the primary side liquid supply pipeline to decrease and maintain it at less than or equal to the energy-saving speed.

[0067] Optionally, the control module 553 is further configured to, if the secondary side temperature is greater than the target control temperature, control the opening degree of the primary side valve to increase until the opening degree of the primary side valve increases to the opening degree threshold, and then control the differential pressure target value of the primary side circulation pump to increase the cooling capacity of the primary side liquid supply pipeline.

[0068] Optionally, the control module 553 is further configured to increase the opening degree of the secondary side valve if the secondary side temperature is still greater than the target control temperature.

[0069] Optionally, the control module 513 is further configured to control the primary side valve and the primary side circulation pump to maintain their current operating state if the secondary side temperature is equal to the target control temperature.

[0070] It should be noted that the structures described in the above embodiments do not constitute a limitation on the energy-saving control device for the liquid cooling system. Each module can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the controller in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the controller can call and execute the operations corresponding to each module. In other embodiments, the energy-saving control device for the liquid cooling system may include more or fewer modules than those shown in the figures.

[0071] Please see Figure 4 In another aspect of the embodiments of this application, a liquid cooling system is also provided. The liquid cooling system includes a primary side liquid supply pipeline 11 for providing cooling capacity, a secondary side liquid supply pipeline 12 deployed on the side to be cooled 14, and a controller 13. The primary side liquid supply pipeline 11 is provided with a primary side valve and a primary side circulation pump. The controller 13 is connected to the primary side valve and the primary side circulation pump. The controller 13 is used to execute a computer program to implement the energy-saving control method of the liquid cooling system described in any embodiment of this application.

[0072] Optionally, the primary side liquid supply pipeline 11 is further provided with a dry cooler, a spray device, and a primary side fan; the dry cooler is used to realize heat exchange between the liquid supply pipeline and the liquid return pipeline in the primary side liquid supply pipeline 11; the spray device includes a spray pipeline containing multiple spray heads and a spray pump connected to the spray pipeline, the spray heads are correspondingly arranged with the dry cooler, the spray pump is communicatively connected to the controller 13, and controls the spray heads to open or close the spray according to the control command of the controller 13; the primary side fan is correspondingly arranged with the dry cooler, and adjusts the speed according to the control command of the controller 13 to adjust the heat exchange efficiency of the dry cooler between the liquid supply pipeline and the liquid return pipeline accordingly.

[0073] Optionally, a cold liquid distribution device (CDU) is provided in the secondary side liquid supply pipeline 12; the cold liquid distribution device includes a heat exchanger 121, a secondary side circulation pump and a secondary side valve, the secondary side circulation pump and the secondary side valve are used to regulate the liquid supply in the secondary side liquid supply pipeline 12, and the heat exchanger 121 is used to realize heat exchange between the primary side liquid supply pipeline 11 and the secondary side liquid supply pipeline 12.

[0074] Optionally, a first temperature sensor is provided in the primary-side liquid supply line 11, and a second temperature sensor is provided in the secondary-side liquid supply line. The first temperature sensor collects the primary-side temperature and sends it to the controller 13, and the second temperature sensor collects the secondary-side temperature and sends it to the controller 13. Figure 4 As shown, the first temperature sensor can collect either the supply temperature or the return temperature in the primary side supply line 11; the second temperature sensor can collect either the supply temperature or the return temperature in the secondary side supply line 12.

[0075] In the liquid cooling system provided in the above embodiment, a dry cooler is installed in the primary side liquid supply line 11. The liquid cooling system provides cooling capacity through the dry cooler and consists of a spray device and heat exchange coils. The opening degree of the primary side valve can adjust the flow rate of the coolant in the primary side circulation line 11. The operation of the primary side fan causes airflow to pass through the dry cooler, realizing heat exchange between the air and the liquid inside the heat exchange coil. The spray device can start the spray pump when the outdoor temperature is high, spraying water onto the heat exchange coil through the spray nozzles to cool the heat exchange coil, increase the heat exchange effect, and ensure that the cooling capacity requirement of the liquid cooling system can be met even under high outdoor temperatures. The primary side circulation pump circulates the liquid in the primary side liquid supply line 11. The high-temperature liquid after heat exchange in the CDU flows to the dry cooler. After heat exchange in the dry cooler, the liquid becomes a low-temperature liquid and is then transported back to the CDU by the primary side circulation pump. The CDU facilitates heat exchange between the primary-side liquid supply line 11 and the secondary-side liquid supply line 12. By controlling the primary-side valve, the flow rate of liquid injected into the CDU heat exchanger through the primary-side liquid supply line 11 is controlled, thereby controlling the heat exchanger's heat exchange capacity and thus controlling the liquid supply temperature from the secondary-side liquid supply line 12 to the server. Simultaneously, the secondary-side circulation pump and secondary-side valve can adjust the flow rate of liquid delivered to the server, thereby accurately controlling the server's cooling.

[0076] Please see Figure 5 In order to gain a more comprehensive understanding of the energy-saving control method for the liquid cooling system provided in the embodiments of this application, the following will be used as an example. Figure 4 The following explanation uses a data center liquid cooling system as an example. The secondary side temperature refers to the secondary side liquid supply temperature. The energy-saving control method for the liquid cooling system includes:

[0077] S11, determine whether the secondary side liquid supply temperature is greater than the target control temperature; if yes, proceed to S12; if no, proceed to S13.

[0078] S12, determine whether the opening degree of the primary side valve has reached the opening threshold; if yes, execute S14; if no, execute S15.

[0079] S14, control the primary side circulation pump speed to increase, and return to S11;

[0080] S15, control the primary side valve opening to increase, and then return to S11;

[0081] S13, determine whether the secondary side liquid supply temperature is lower than the target control temperature; if yes, proceed to S16; if no, proceed to S19.

[0082] S16, determine whether the speed of the primary circulation pump is the initial value; if yes, execute S17; if no, execute S18.

[0083] S17, control the opening degree of the primary side valve to decrease, and return to S11;

[0084] S18, control the speed of the primary side circulation pump to decrease, and return to S11;

[0085] S19, control the primary side valve and primary side circulation pump to maintain the current working state, and return to S11.

[0086] The energy-saving control method for the aforementioned liquid cooling system involves a controller that monitors the secondary side temperature in real time to determine whether the current cooling capacity supply matches the heat dissipation demand. This controller then performs coordinated control of the primary side circulation pump and valves. The primary side circulation pump and valves operate in tandem. When the secondary side temperature is lower than the target value, the liquid cooling system needs to reduce its cooling capacity supply. In this case, the primary side pump speed is reduced first. Once the primary side pump reaches its minimum speed, the opening of the primary side valve is then reduced. Before the primary side circulation pump reaches its minimum speed, the fluid resistance in the liquid cooling system is minimized, thus significantly improving the energy efficiency of the primary side circulation pump.

[0087] When the secondary side temperature is higher than the target value, the liquid cooling system needs to increase the supply of cooling capacity. In this case, the opening of the primary side valve is increased first to reduce the fluid resistance in the liquid cooling system. When the opening of the primary side valve reaches its maximum and the fluid resistance in the liquid cooling system is reduced to its minimum, if the secondary side temperature still does not meet the requirements, the primary side circulation pump is then accelerated. Therefore, during the acceleration of the primary side circulation pump, the fluid resistance in the liquid cooling system is minimized, which can greatly improve the energy efficiency of the primary side circulation pump.

[0088] Thus, through the above control logic, the operating efficiency of the primary circulation pump in the liquid cooling system can be maximized, enabling the liquid cooling system as a whole to operate in the most energy-efficient state.

[0089] In another aspect, this application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to perform the energy-saving control method for a liquid cooling system according to any embodiment of this application.

[0090] It will be understood by those skilled in the art that all or part of the processes in the methods provided in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0091] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A liquid cooling system energy saving control method, characterized by, include: Obtain the secondary side temperature in the secondary side liquid supply pipeline that carries the heat energy to be dissipated; Determine the magnitude of the secondary side temperature and the target control temperature; If the secondary side temperature is lower than the target control temperature, the primary side circulation pump and primary side valve in the primary liquid supply pipeline that provides cooling capacity are controlled sequentially to reduce the cooling capacity of the primary liquid supply pipeline. This includes: if the secondary side temperature is lower than the target control temperature, controlling the target pressure difference of the primary side circulation pump in the primary liquid supply pipeline that provides cooling capacity to decrease until the target pressure difference of the primary side circulation pump decreases to its initial value; controlling the speed of the primary side fan in the primary liquid supply pipeline to decrease and maintain it below or equal to the energy-saving speed; and then controlling the opening degree of the primary side valve in the primary liquid supply pipeline to decrease, thereby reducing the cooling capacity of the primary liquid supply pipeline. If the secondary side temperature is greater than the target control temperature, the primary side valve and the primary side circulation pump are controlled sequentially to increase the cooling capacity of the primary side liquid supply pipeline. After the primary side valve and the primary side circulation pump are adjusted sequentially, if the secondary side temperature is still greater than the target control temperature, the opening degree of the secondary side valve is increased.

2. The energy-saving control method for a liquid cooling system as described in claim 1, characterized in that, If the secondary side temperature is greater than the target control temperature, the primary side valve and the primary side circulation pump are controlled sequentially to increase the cooling capacity of the primary side liquid supply pipeline, including: If the secondary side temperature is greater than the target control temperature, the opening degree of the primary side valve is increased until the opening degree of the primary side valve increases to the opening threshold. Then, the pressure difference target value of the primary side circulation pump is increased to increase the cooling capacity of the primary side liquid supply pipeline.

3. The energy saving control method for a liquid cooling system according to any one of claims 1 or 2, wherein Also includes: If the secondary side temperature is equal to the target control temperature, the primary side valve and the primary side circulation pump are controlled to maintain their current operating state.

4. A liquid cooling system energy saving control device, characterized by, include: The acquisition module acquires the secondary side temperature in the secondary side liquid supply pipeline carrying the heat energy to be dissipated. The judgment module is used to determine the magnitude of the secondary side temperature and the target control temperature; The control module is configured to, if the secondary side temperature is lower than the target control temperature, sequentially control the primary-side circulation pump and primary-side valve in the primary liquid supply line providing cooling capacity to reduce the cooling capacity of the primary-side liquid supply line. The step of controlling the primary-side circulation pump and primary-side valve in the primary liquid supply line providing cooling capacity to reduce the cooling capacity of the primary-side liquid supply line includes: if the secondary side temperature is lower than the target control temperature, controlling the differential pressure target value of the primary-side circulation pump in the primary liquid supply line providing cooling capacity to decrease until the primary-side circulation... When the pump's differential pressure target value is reduced to its initial value, the speed of the primary-side fan in the primary-side liquid supply pipeline is reduced and kept less than or equal to the energy-saving speed. Then, the opening of the primary-side valve in the primary-side liquid supply pipeline is reduced to decrease the cooling capacity of the primary-side liquid supply pipeline. If the secondary-side temperature is greater than the target control temperature, the primary-side valve and the primary-side circulation pump are controlled sequentially to increase the cooling capacity of the primary-side liquid supply pipeline. After sequentially adjusting the primary-side valve and the primary-side circulation pump, if the secondary-side temperature is still greater than the target control temperature, the opening of the secondary-side valve is increased.

5. A liquid cooling system, characterized by, It includes a primary side liquid supply pipeline that provides cooling capacity, a secondary side liquid supply pipeline deployed on the side to be cooled, and a controller. The primary side liquid supply pipeline is equipped with a primary side valve and a primary side circulation pump. The controller is connected to the primary side valve and the primary side circulation pump. The controller is used to execute a computer program to implement the energy-saving control method for the liquid cooling system as described in any one of claims 1 to 3.

6. The liquid cooling system of claim 5, wherein, The primary side liquid supply pipeline is also equipped with a dry cooler, a spray device and a primary side fan; The dry cooler is used to realize heat exchange between the supply pipe and the return pipe in the primary side liquid supply pipeline; the spray device includes a spray pipeline containing multiple spray heads and a spray pump connected to the spray pipeline. The spray heads are correspondingly arranged with the dry cooler. The spray pump is communicatively connected to the controller and controls the spray heads to turn on or off spraying according to the control instructions of the controller. The primary side fan is configured correspondingly to the dry cooler, and its speed is adjusted according to the control command of the controller to adjust the heat exchange efficiency of the dry cooler between the liquid supply pipe and the liquid return pipe.

7. The liquid cooling system of claim 5, wherein, The secondary side liquid supply pipeline is equipped with a cold liquid distribution device; The cold liquid distribution device includes a heat exchanger, a secondary side circulation pump, and a secondary side valve. The secondary side circulation pump and the secondary side valve are used to regulate the liquid supply in the secondary side supply pipeline, and the heat exchanger is used to realize heat exchange between the primary side supply pipeline and the secondary side supply pipeline.

8. The liquid cooling system of claim 5, wherein, The primary side liquid supply line is equipped with a first temperature sensor, and the secondary side liquid supply line is equipped with a second temperature sensor. The first temperature sensor collects the primary side temperature and sends it to the controller, and the second temperature sensor collects the secondary side temperature and sends it to the controller.

9. A computer readable storage medium storing a computer program, characterized in that, The computer program, when executed by a processor, causes the processor to perform the liquid cooling system energy-saving control method of any one of claims 1 to 3.

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