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

Abstract

The embodiment of the application discloses a liquid cooling system energy-saving control method, device, liquid cooling system and medium, and the method comprises the following steps: obtaining the primary side temperature in the primary side liquid supply pipeline which provides cold energy and the primary side fan rotating speed; obtaining the secondary side temperature in the secondary side liquid supply pipeline which carries the side heat energy to be radiated; judging whether the primary side temperature is greater than a set value; when the primary side temperature is greater than the set value, if the secondary side temperature is greater than a target control temperature and the primary side fan rotating speed reaches an energy-saving rotating speed, the pressure difference target value of the primary side circulating pump is increased; if the pressure difference target value of the primary side circulating pump reaches a pressure difference threshold value and the secondary side temperature is still greater than the target control temperature, the primary side fan rotating speed is increased. Through real-time monitoring of the primary side temperature and the secondary side temperature, the pressure difference target value of the primary side circulating pump is dynamically adjusted under the condition that the refrigeration demand can be considered, the system as a whole is ensured to operate in the best energy efficiency range, and the purpose of effectively saving energy and improving system stability is achieved.

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 overheating issue, many data center server rooms currently use liquid cooling systems to dissipate heat from servers. Liquid cooling systems are equipped with fans and circulation pumps. By controlling the fan speed, the liquid supply temperature can be adjusted, and by controlling the circulation pump frequency, the liquid supply pressure can be adjusted. Since the two are relatively independent, not only may the fans and circulation pumps operate in high-efficiency mode for a long time, but it is also not conducive to meeting the cooling demand. 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] In a first aspect, an energy-saving control method for a liquid cooling system is characterized by comprising:

[0007] Obtain the primary side temperature and primary side fan speed in the primary side liquid supply pipeline that provides cooling capacity;

[0008] Obtain the secondary side temperature in the secondary side liquid supply pipeline that carries the heat energy to be dissipated;

[0009] Determine whether the primary side temperature is greater than the set value;

[0010] When the primary side temperature is greater than the set value, if the secondary side temperature is greater than the target control temperature and the primary side fan speed reaches the energy-saving speed, the target value of the differential pressure of the primary side circulation pump is increased.

[0011] If the differential pressure target value of the primary side circulating pump reaches the differential pressure threshold, and the secondary side temperature is still greater than the target control temperature, the speed of the primary side fan is increased.

[0012] Secondly, an energy-saving control device for a liquid cooling system is also provided, comprising:

[0013] The first acquisition module is used to acquire the primary side temperature and the primary side fan speed in the primary side liquid supply pipeline that provides cooling capacity.

[0014] The second acquisition module is used to acquire the secondary side temperature in the secondary side liquid supply pipeline carrying the heat energy to be dissipated.

[0015] The judgment module is used to determine whether the primary side temperature is greater than a set value;

[0016] The control module is used to control the differential pressure target value of the primary side circulation pump to increase when the primary side temperature is greater than the set value, the secondary side temperature is greater than the target control temperature, and the primary side fan speed reaches the energy-saving speed; and to control the primary side fan speed to increase when the differential pressure target value of the primary side circulation pump reaches the differential pressure threshold and the secondary side temperature is still greater than the target control temperature.

[0017] 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 fan and a primary side circulation pump, and the controller is connected to the primary side fan and the primary side circulation pump.

[0018] 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.

[0019] 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.

[0020] The energy-saving control method for liquid cooling systems provided in the above embodiments of this application acquires the primary side temperature, primary side fan speed, and secondary side temperature in the secondary side liquid supply pipeline in real time. When the primary side temperature is greater than the set value and the fan speed has reached the energy-saving speed, the liquid supply is increased by accelerating the pressure difference target value of the primary side circulation pump, thereby increasing the cooling capacity of the primary side and achieving the goal of controlling the secondary side temperature. When the pressure difference target value has increased to the pressure difference threshold, if the secondary side temperature is still greater than the target control temperature, the primary side fan speed is further increased to achieve the goal of controlling the secondary side temperature. In this way, by monitoring the primary and secondary side temperatures in real time, the pressure difference target value of the primary side circulation pump can be dynamically adjusted while taking into account the cooling demand, ensuring that the overall system operates within the optimal energy efficiency range, thereby achieving effective energy saving and improving system stability.

[0021] 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

[0022] 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;

[0023] Figure 2 This is a flowchart of an energy-saving control method for a liquid cooling system in one embodiment;

[0024] Figure 3 This is a schematic diagram of the structure of an energy-saving control device for a liquid cooling system in one embodiment;

[0025] Figure 4 This is a schematic diagram of the liquid cooling system in one embodiment;

[0026] 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

[0027] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] 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.

[0029] 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.

[0030] 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. Liquid carrying heat from the server flows from the secondary-side liquid supply line 51 towards the primary-side liquid supply line 53. At the heat exchanger 54, it transfers heat to the primary-side liquid supply line 53 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 within the primary-side liquid supply line 53 to release heat. The coolant then flows back to the heat exchanger 54. Thus, the heat generated by the server is promptly transferred from the secondary-side liquid supply line 51 to the heat exchanger 54, where it is transferred to the primary-side liquid supply line 53 for timely release, and this cycle repeats continuously. The cooling section 531 in the primary-side liquid supply line 53 is equipped with a fan 532. Changes in the fan speed adjust the heat release efficiency of the primary-side liquid supply line 53. A pump 533 is also installed in the primary-side liquid supply line 53, and changes in the pump frequency adjust the liquid supply volume of the primary-side liquid supply line 53. The controller 55 monitors the temperature of the primary liquid supply line 53 and the secondary liquid supply line 51 in real time, and dynamically adjusts the frequency of the pump 533 and the speed of the fan 532 in the primary 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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:

[0035] S101, obtain the primary side temperature and primary side fan speed in the primary side liquid supply pipeline that provides cooling capacity;

[0036] S103, Obtain the secondary side temperature in the secondary side liquid supply pipeline carrying the heat energy to be dissipated;

[0037] S105, determine whether the primary side temperature is greater than the set value;

[0038] S107, when the primary side temperature is greater than the set value, if the secondary side temperature is greater than the target control temperature and the primary side fan speed reaches the energy-saving speed, the pressure difference target value of the primary side circulation pump is increased.

[0039] S109, if the differential pressure target value of the primary side circulating pump reaches the differential pressure threshold and the secondary side temperature is still greater than the target control temperature, the speed of the primary side fan is controlled to increase.

[0040] 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.

[0041] The controller monitors the primary and secondary temperatures in real time. When the primary temperature exceeds the set value, based on the secondary temperature and the operating status of the primary fan, if the cooling demand of the liquid cooling system is not met when the primary fan speed reaches the energy-saving speed, the controller controls the pressure difference target value of the primary circulating pump to increase the flow rate of the primary liquid supply pipeline, thereby improving the heat exchange between the primary and secondary liquid supply pipelines. This satisfies the cooling demand while taking into account the overall energy efficiency of the liquid cooling system. If the cooling demand is still not met when the pressure difference target value of the primary circulating pump reaches the pressure difference threshold, the controller again increases the speed of the primary fan to increase the heat dissipation efficiency of the primary liquid supply pipeline, prioritizing system temperature while appropriately sacrificing the overall energy efficiency of the liquid cooling system.

[0042] The setpoint can refer to a pre-set temperature value or a temperature range. Typically, the setpoint is determined by testing the heat exchange efficiency of both the primary and secondary coolant supply lines and the efficiency of heat release in the cooling section when the primary side temperature reaches a certain value, based on factors such as the type of coolant in the primary side supply line and the external temperature. Alternatively, the setpoint can be determined by analyzing the historical operating records of the liquid cooling system to determine a specific primary side temperature value at which the heat exchange efficiency of both the primary and secondary coolant supply lines and the efficiency of heat release in the cooling section are optimal. The target control temperature can be a temperature value set by the user based on heat dissipation requirements, or a temperature value set based on the ambient temperature required for the equipment generating heat on the heat-generating side to maintain normal operation.

[0043] The primary-side fan is installed in the cooling section of the primary-side liquid supply pipeline. 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 speed of the primary-side fan, 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.

[0044] In the above embodiments, the controller acquires the primary side temperature, primary side fan speed, and secondary side temperature in the secondary side liquid supply pipeline in real time. When the primary side temperature is greater than the set value and the fan speed has reached the energy-saving speed, the liquid supply is increased by accelerating the pressure difference target value of the primary side circulation pump, thereby increasing the cooling capacity of the primary side and achieving the purpose of controlling the secondary side temperature. When the pressure difference target value has increased to the pressure difference threshold, if the secondary side temperature is still greater than the target control temperature, the primary side fan speed is further increased to achieve the goal of secondary side temperature control. In this way, by monitoring the primary and secondary side temperatures in real time, the pressure difference target value of the primary side circulation pump is dynamically adjusted while taking into account the cooling demand, ensuring that the overall system operates within the optimal energy efficiency range, thereby achieving effective energy saving and improving system stability.

[0045] In some embodiments, the energy-saving control method for the liquid cooling system further includes:

[0046] When the primary side temperature is greater than the set value, if the secondary side temperature is equal to the target control temperature, then the primary side circulation pump and the primary side fan are controlled to maintain their current working state.

[0047] When the primary side temperature is greater than the set value, while the secondary side temperature is equal to the target control temperature, it means that the cooling capacity provided by the primary side liquid supply pipeline can currently 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 the current working state, and the primary side circulation pump and the primary side fan can be controlled to continue to work with the current working parameters.

[0048] In the above embodiments, the controller monitors the primary side temperature and the secondary side temperature in real time. When the primary side temperature is greater than the set value, it will further consider the secondary side temperature to determine whether the secondary side temperature meets the target control temperature. This confirms that the current cooling capacity in the liquid cooling system can meet the heat dissipation requirements of the side to be cooled, thus achieving energy saving and stability while more accurately taking into account the heat dissipation requirements.

[0049] In some embodiments, the energy-saving control method for the liquid cooling system further includes:

[0050] When the primary side temperature is greater than the set value, if the secondary side temperature is less than the target control temperature, the differential pressure target value of the primary side circulation pump is reduced.

[0051] When the primary side temperature is greater than the set value, while the secondary side temperature is less than the target control temperature, it indicates that there is a certain redundancy in the cooling capacity provided by the primary side liquid supply pipeline. At this time, the target value of the pressure difference of the primary side circulation pump can be reduced to reduce the liquid supply in the primary side liquid supply pipeline accordingly, so that the cooling capacity provided by the primary side liquid supply pipeline is better matched with the heat dissipation demand, thus saving the overall energy efficiency of the liquid cooling system.

[0052] In some embodiments, the energy-saving control method for the liquid cooling system further includes a step of judging the secondary side temperature and the primary side fan speed when the primary side temperature is greater than the set value. The judgment of the secondary side temperature and the primary side fan speed includes:

[0053] First, determine whether the primary side fan speed has reached the energy-saving speed;

[0054] If the primary side fan speed does not reach the energy-saving speed, then the primary side fan speed is controlled to increase;

[0055] If the primary side fan speed reaches the energy-saving speed, then it is determined whether the secondary side temperature is greater than the target control temperature.

[0056] The controller monitors the primary and secondary temperatures in real time. When the primary temperature exceeds the set value, it first checks the operating status of the primary fan. If the primary fan speed is below the energy-saving speed, the cooling capacity of the primary liquid supply line can be increased by increasing the primary fan speed. During this process, the cooling capacity is increased by controlling the fan to always operate in the high-efficiency range. Once the primary fan speed reaches the energy-saving speed, the secondary temperature is further considered to determine whether it meets the target control temperature. This confirms that the current cooling capacity of the liquid cooling system can meet the heat dissipation requirements of the side to be cooled, and determines whether to increase the cooling capacity of the primary liquid supply line.

[0057] In the above embodiments, the cooling capacity provided by the primary side liquid supply pipeline in the liquid cooling system is adjusted and controlled. Multiple cases are distinguished by the real-time monitoring results of the primary side temperature and the secondary side temperature. The adjustment and control of the cooling capacity of the primary side liquid supply pipeline is added, taking into account the energy efficiency range of the fan operation. The control of the primary side fan speed and the control of the primary side circulation pump are distinguished in multiple cases, so as to achieve energy saving and stability of the liquid cooling system while more accurately taking into account the heat dissipation requirements.

[0058] In some embodiments, the energy-saving control method for the liquid cooling system further includes:

[0059] When the primary side temperature is less than the set value, determine whether the target value of the differential pressure of the primary side circulation pump is greater than the initial value;

[0060] If the target differential pressure value is greater than the initial value, the target differential pressure value of the primary side circulation pump is controlled to decrease.

[0061] If the target pressure difference is less than or equal to the initial value, the speed of the primary side fan is reduced.

[0062] Optionally, when the external ambient temperature decreases, the heat dissipation demand on the side to be cooled decreases, and the required cooling capacity in the liquid cooling system decreases, the primary side temperature in the primary side liquid supply line will decrease. The controller monitors the primary and secondary side temperatures in real time. When the primary side temperature is lower than the set value, it indicates that there is a certain redundancy in the cooling capacity provided by the primary side liquid supply line. The controller first judges the operating status of the primary side circulation pump. If the target pressure difference of the primary side circulation pump is greater than the initial value, the target pressure difference of the primary side circulation pump can be reduced to reduce the liquid supply in the primary side liquid supply line, so that the cooling capacity provided by the primary side liquid supply line can better match the heat dissipation demand and save the overall energy efficiency of the liquid cooling system. After the target pressure difference of the primary side circulation pump is returned to the initial value, the cooling capacity of the liquid cooling system can be adjusted by controlling the speed of the primary side fan to meet the heat dissipation demand of the side to be cooled. For example, if the primary side temperature is still lower than the set value after the target pressure difference of the primary side circulation pump is returned to the initial value, the speed of the primary side fan can be reduced.

[0063] In the above embodiments, the cooling capacity provided by the primary side liquid supply pipeline in the liquid cooling system is adjusted and controlled. The real-time monitoring results of the primary and secondary side temperatures are used to distinguish various situations. The cooling capacity of the primary side liquid supply pipeline is reduced according to the changes required in actual application. The energy efficiency range of the fan operation is taken into consideration. First, the pressure difference target value of the primary side circulation pump is ensured to return to the initial value before the speed of the primary side fan is adjusted to operate in the high energy efficiency range. This achieves more accurate heat dissipation while effectively saving energy and improving system stability.

[0064] In some embodiments, after controlling the primary side fan speed to increase when the target pressure difference value of the primary side circulating pump reaches the pressure difference threshold and the secondary side temperature is still greater than the target control temperature, the method further includes:

[0065] Return to the step of determining whether the primary side temperature is greater than the set value, until the primary side temperature is less than or equal to the set value, the secondary side temperature is less than or equal to the target control temperature, or the primary side fan speed reaches the threshold speed.

[0066] The adjustment of the primary side fan speed can be achieved in different ways, such as: increasing or decreasing the primary side fan speed by a preset speed value each time, increasing or decreasing the speed value by a certain proportion each time, or using a PID (proportional-integral-derivative) control algorithm.

[0067] The controller monitors the primary and secondary temperatures in real time and determines whether the primary temperature exceeds a set value. When the primary temperature exceeds the set value, based on the secondary temperature and the operating status of the primary fan, if the cooling demand of the liquid cooling system is not met when the primary fan speed reaches the energy-saving speed, the controller controls the pressure difference target value of the primary circulating pump and increases the flow rate of the primary liquid supply pipeline to improve the heat exchange between the primary and secondary liquid supply pipelines, thus meeting the cooling demand while taking into account the overall energy efficiency of the liquid cooling system. If the pressure difference target value of the primary circulating pump has reached the pressure difference threshold, and the cooling capacity provided by the liquid cooling system is still insufficient to meet the heat dissipation demand, the controller continues to increase the speed of the primary fan and returns to the step of determining whether the primary temperature exceeds the set value. The aforementioned process can be repeated multiple times until the judgment conditions in the aforementioned process are no longer met or the primary fan speed reaches the threshold speed.

[0068] Optionally, in this embodiment, the adjustment of the differential pressure target value of the primary-side circulation pump can also be achieved in different ways, such as: increasing or decreasing the differential pressure target value by a preset differential pressure value each time, increasing or decreasing the differential pressure value by a certain proportion each time, or using a PID (proportional-integral-derivative) control algorithm. In an optional example, the PID control range corresponding to the cooling capacity demand is set to 0-200, the control target is the primary-side temperature, and PID control is performed with the current actual temperature of the primary side as feedback. When the cooling capacity demand is 0-100, the primary-side fan speed is adjusted to 30%-70%. When the cooling capacity demand is 100-150, the differential pressure target value of the primary-side circulation pump is changed so that the frequency of the primary-side circulation pump changes accordingly within the range of 30Hz-50Hz. When the cooling capacity demand is 150-200, the primary-side fan speed is adjusted to 70%-100%.

[0069] In the energy-saving control method for liquid cooling system provided in this application embodiment, after each adjustment of the primary side fan speed or the target pressure difference value of the primary side circulating pump, the process can return to the step of judging whether the primary side temperature is greater than the set value. The corresponding control logic can be looped multiple times until the judgment condition in the corresponding control logic is no longer met.

[0070] In the above embodiments, the cooling capacity of the liquid cooling system is regulated and controlled through the primary side liquid supply pipeline. The real-time monitoring results of the primary side temperature and the secondary side temperature are used to distinguish various situations. The pressure difference target value of the primary side circulation pump is dynamically adjusted to ensure that the primary side fan operates in the optimal energy efficiency range under normal operation, and finally the optimal operating energy efficiency of the liquid cooling system is achieved.

[0071] Please see Figure 3 In another aspect, this application provides an energy-saving control device for a liquid cooling system, comprising: a first acquisition module 11, used to acquire the primary side temperature and primary side fan speed in the primary side liquid supply pipeline that provides cooling capacity; a second acquisition module 12, used to acquire the secondary side temperature in the secondary side liquid supply pipeline that carries heat energy to be dissipated; a judgment module 13, used to judge whether the primary side temperature is greater than a set value; and a control module 14, used to control the pressure difference target value of the primary side circulation pump to increase when the primary side temperature is greater than the set value, if the secondary side temperature is greater than a target control temperature and the primary side fan speed reaches an energy-saving speed; and if the pressure difference target value of the primary side circulation pump reaches a pressure difference threshold and the secondary side temperature is still greater than the target control temperature, control the primary side fan speed to increase.

[0072] Optionally, the control module 14 is further configured to control the primary side circulation pump and the primary side fan to maintain their current operating state if the secondary side temperature is equal to the target control temperature when the primary side temperature is greater than the set value.

[0073] Optionally, the control module 14 is further configured to control the differential pressure target value of the primary side circulation pump to decrease if the secondary side temperature is less than the target control temperature when the primary side temperature is greater than the set value.

[0074] Optionally, the control module 14 is further configured to, when the primary side temperature is greater than the set value, first determine whether the primary side fan speed has reached the energy-saving speed; if the primary side fan speed has not reached the energy-saving speed, then control the primary side fan speed to increase; if the primary side fan speed reaches the energy-saving speed, then determine whether the secondary side temperature is greater than the target control temperature.

[0075] Optionally, the control module 14 is further configured to determine whether the target pressure difference value of the primary side circulation pump is greater than the initial value when the primary side temperature is less than the set value; if the target pressure difference value is greater than the initial value, control the target pressure difference value of the primary side circulation pump to decrease; if the target pressure difference value is less than or equal to the initial value, control the speed of the primary side fan to decrease.

[0076] Optionally, the control module 14 is further configured to, after the step of controlling the primary side fan speed to increase when the differential pressure target value of the primary side circulating pump reaches the differential pressure threshold and the secondary side temperature is still greater than the target control temperature, return to the step of determining whether the primary side temperature is greater than the set value, until the primary side temperature is less than or equal to the set value, the secondary side temperature is less than or equal to the target control temperature, or the primary side fan speed reaches the threshold speed.

[0077] 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.

[0078] 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. A primary side fan and a primary side circulation pump are provided in the primary side liquid supply pipeline 11. The controller 13 is connected to the primary side fan 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.

[0079] Optionally, the primary side liquid supply pipeline 11 is further provided with a dry cooler and a spray device; 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 instructions of the controller 13; the primary side fan is correspondingly arranged with the dry cooler, and adjusts the speed according to the control instructions 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.

[0080] 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.

[0081] 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.

[0082] 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 primary side fan operates to allow airflow through the dry cooler, achieving heat exchange between the air and the liquid inside the heat exchange coils. The spray device can be activated when the outdoor temperature is high, spraying water onto the heat exchange coils through spray nozzles to cool the heat exchange coils and increase the heat exchange effect, thus meeting the cooling capacity requirements of the liquid cooling system even in 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, where it is cooled and then returned 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.

[0083] 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 primary side temperature refers to the primary side liquid supply temperature. The energy-saving control method for the liquid cooling system includes:

[0084] S11, determine whether the primary side liquid supply temperature is greater than the set value; if yes, proceed to S12; if no, proceed to S16.

[0085] S12, determine whether the fan speed is greater than the energy-saving speed. If yes, execute S121; otherwise, execute S15.

[0086] S121, determine whether the secondary side temperature is greater than the target control temperature; if yes, proceed to S122; if no, proceed to S14.

[0087] S122, determine whether the target pressure difference of the circulating pump is greater than the pressure difference threshold. If yes, execute S123; otherwise, execute S13.

[0088] S123, continue to control the fan speed to increase, and return to S11;

[0089] S13, control the target value of differential pressure of the circulating pump to increase, and return to S11;

[0090] S14, determine whether the secondary side temperature is lower than the target control temperature. If yes, execute S141; otherwise, execute S142.

[0091] S141, control the target value of differential pressure of the circulating pump to decrease, and return to S11;

[0092] S142, maintain the target values ​​for fan speed and circulating pump differential pressure; and return to S11;

[0093] S15, control the fan speed to increase, and then return to S11;

[0094] S16, determine whether the target value of the differential pressure of the circulating pump is greater than the original set value; if yes, execute S161, if no, execute S162;

[0095] S161, control the target value of differential pressure of the circulating pump to decrease, and return to S11;

[0096] S162, control the fan speed to decrease, and return to S11.

[0097] The energy-saving control method for the aforementioned liquid cooling system involves a controller that monitors both primary and secondary temperatures, dynamically adjusting the differential pressure target value of the circulating pump, and ensuring that the fan operates within its optimal energy efficiency range under normal conditions, ultimately achieving optimal operation of the liquid cooling system. When the primary temperature exceeds the set value and the fan speed has reached the energy-saving speed, the liquid supply is increased by raising the differential pressure target value of the primary circulating pump, thereby increasing the cooling capacity of the primary liquid supply pipeline and ultimately achieving the target for controlling the secondary temperature. If the differential pressure target value has been increased to the differential pressure threshold, and the secondary temperature is still higher than the target control temperature, then the liquid cooling system prioritizes temperature over energy efficiency, maximizing the fan speed to achieve the secondary temperature control target. When the outdoor temperature drops or the cooling capacity required by the side to be cooled decreases, the primary side liquid supply temperature will gradually decrease. During the decrease, the pressure difference target value of the circulating pump that has been increased needs to be adjusted back first. When it is adjusted back to the original set value, the fan speed is then adjusted to enter the adjustment range of the fan's high-efficiency range. In this way, the stability of the heat dissipation efficiency of the side to be cooled is ensured, and the fan can be operated in the high-efficiency range to the greatest extent, achieving a win-win situation of energy saving and stability.

[0098] 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.

[0099] 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).

[0100] 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. An energy-saving control method for a liquid cooling system, characterized in that, include: Obtain the primary side temperature and primary side fan speed in the primary side liquid supply pipeline that provides cooling capacity; Obtain the secondary side temperature in the secondary side liquid supply pipeline that carries the heat energy to be dissipated; Determine whether the primary side temperature is greater than the set value; When the primary side temperature is greater than the set value, first determine whether the primary side fan speed has reached the energy-saving speed; if the primary side fan speed has not reached the energy-saving speed, then control the primary side fan speed to increase; if the primary side fan speed has reached the energy-saving speed, then determine whether the secondary side temperature is greater than the target control temperature; if the secondary side temperature is greater than the target control temperature and the primary side fan speed has reached the energy-saving speed, then control the pressure difference target value of the primary side circulating pump to increase. If the differential pressure target value of the primary side circulating pump reaches the differential pressure threshold, and the secondary side temperature is still greater than the target control temperature, the speed of the primary side fan is increased.

2. The energy-saving control method for a liquid cooling system as described in claim 1, characterized in that, Also includes: When the primary side temperature is greater than the set value, if the secondary side temperature is equal to the target control temperature, then the primary side circulation pump and the primary side fan are controlled to maintain their current working state.

3. The energy-saving control method for a liquid cooling system as described in claim 1, characterized in that, Also includes: When the primary side temperature is greater than the set value, if the secondary side temperature is less than the target control temperature, the differential pressure target value of the primary side circulation pump is reduced.

4. The energy-saving control method for a liquid cooling system as described in claim 1, characterized in that, Also includes: When the primary side temperature is less than the set value, determine whether the target value of the differential pressure of the primary side circulation pump is greater than the initial value; If the target differential pressure value is greater than the initial value, the target differential pressure value of the primary side circulation pump is controlled to decrease. If the target pressure difference is less than or equal to the initial value, the speed of the primary side fan is reduced.

5. The energy-saving control method for a liquid cooling system as described in claim 1, characterized in that, If the differential pressure target value of the primary side circulating pump reaches the differential pressure threshold, and the secondary side temperature is still greater than the target control temperature, after controlling the primary side fan speed to increase, the method further includes: Return to the step of determining whether the primary side temperature is greater than the set value, until the primary side temperature is less than or equal to the set value, the secondary side temperature is less than or equal to the target control temperature, or the primary side fan speed reaches the threshold speed.

6. An energy-saving control device for a liquid cooling system, characterized in that, include: The first acquisition module is used to acquire the primary side temperature and the primary side fan speed in the primary side liquid supply pipeline that provides cooling capacity. The second acquisition module is used to acquire 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 whether the primary side temperature is greater than a set value; The control module is configured to, when the primary side temperature is greater than the set value, first determine whether the primary side fan speed has reached the energy-saving speed; if the primary side fan speed has not reached the energy-saving speed, control the primary side fan speed to increase; if the primary side fan speed reaches the energy-saving speed, then determine whether the secondary side temperature is greater than the target control temperature; if the secondary side temperature is greater than the target control temperature and the primary side fan speed has reached the energy-saving speed, control the differential pressure target value of the primary side circulation pump to increase; if the differential pressure target value of the primary side circulation pump reaches the differential pressure threshold and the secondary side temperature is still greater than the target control temperature, control the primary side fan speed to increase.

7. A liquid cooling system, characterized in that, 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 fan and a primary-side circulation pump, and the controller is connected to the primary-side fan 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 5.

8. The liquid cooling system as described in claim 7, characterized in that, The primary side liquid supply pipeline is also equipped with a dry cooler and a spray device; 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.

9. The liquid cooling system as described in claim 7, characterized in that, 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.

10. The liquid cooling system as described in claim 7, characterized in that, 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.

11. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the processor performs the energy-saving control method for the liquid cooling system as described in any one of claims 1 to 5.

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