Energy-saving control method, system and computer-readable storage medium for liquid cooling equipment

Abstract

The present invention relates to an energy-saving control method, system and computer-readable storage medium for liquid cooling equipment, and the method includes: S1, liquid cooling cabinet startup operation; S2, collecting the temperature T1 of the water side inlet and the temperature T4 of the liquid side outlet of the plate heat exchanger; judging whether the temperature T4 is greater than the first preset threshold; if so, go to step S3; if not, go to step S4; S3, judging whether the temperature T1 is greater than the second preset threshold; if so, increase the speed of the dry cooler fan and the water pump, and return to step S2; if not, increase the speed of the water pump, and then return to step S2; S4, judging whether the first-order derivative change of the temperature T4 in the adjacent collection cycle is greater than the third preset threshold; if so, return to step S2; if not, reduce the speed of the liquid pump and the water pump, and return to step S2. The present invention accurately identifies the operating load of IT equipment through the temperature changes of the liquid side and the water side of the plate heat exchanger to perform energy-saving control.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid cooling of data centers, and in particular relates to an energy-saving control method and system for liquid cooling equipment and a computer-readable storage medium. Background Art

[0002] With the advancement of science and technology and the popularization of 5G networks, the performance requirements of electronic information equipment are getting higher and higher, resulting in a significant increase in the heat generation and heat flux density of electronic components. The power consumption caused by cooling the heat generated by electronic components will also increase exponentially. At present, a single air-cooled BBU cabinet can be fully configured with 10 BBUs, and the total power consumption of a single cabinet exceeds 10kW. Almost all the power consumed by the BBU equipment is converted into heat energy; after the BBU is centralized, the heat is also concentrated in the BBU cabinet. Traditional air cooling cannot meet the heat dissipation needs, so liquid cooling is used to achieve energy saving.

[0003] In existing liquid cooling equipment, the coolant is cooled by heat exchange with the plate heat exchanger outside the liquid cooling cabinet; in addition, cooling water is used to exchange heat with the coolant through the plate heat exchanger. The inlet and outlet of the coolant at the plate heat exchanger are called the liquid side inlet and liquid side outlet, and the inlet and outlet of the cooling water at the plate heat exchanger are called the water side inlet and water side outlet.

[0004] Due to changes in ambient temperature and power of IT equipment, different loads are caused, resulting in different energy consumption. Therefore, in order to save energy, liquid cooling cabinets need to be controlled. Existing control methods often adjust the control method through judgment of single-point thresholds, resulting in large fluctuations in the adjustment process and not energy-saving during operation. Summary of the invention

[0005] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to solve at least one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide an energy-saving control method, system and computer-readable storage medium for a liquid cooling device that meets one or more of the above-mentioned needs.

[0006] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0007] An energy-saving control method for a liquid cooling device, the liquid cooling device comprises a liquid cooling cabinet, a plate heat exchanger and a dry cooler, the liquid side inlet and the liquid side outlet of the plate heat exchanger are respectively connected to the inlet and outlet of the cooling liquid of the liquid cooling cabinet to form a circulation flow path of the cooling liquid, and the circulation flow path of the cooling liquid is provided with a liquid pump; the water side inlet and the water side outlet of the plate heat exchanger are respectively connected to the water outlet and the water inlet of the dry cooler to form a circulation flow path of the cooling water, and the circulation flow path of the cooling water is provided with a water pump; a dry cooler fan is arranged outside the liquid cooling device, and the energy-saving control method comprises the following steps:

[0008] S1, liquid cooling cabinet is turned on and running;

[0009] S2, collecting the temperature T1 of the water side inlet, the temperature T2 of the water side outlet, the temperature T3 of the liquid side inlet, and the temperature T4 of the liquid side outlet of the plate heat exchanger; judging whether the temperature T4 is greater than the first preset threshold; if so, go to step S3; if not, go to step S4;

[0010] S3, determining whether the temperature T1 is greater than a second preset threshold; if so, increasing the speed of the dry cooler fan and the water pump, and then returning to step S2; if not, increasing the speed of the water pump, and then returning to step S2;

[0011] S4, determine whether the first-order derivative change of the temperature T4 in adjacent collection cycles is greater than a third preset threshold; if so, return to step S2; if not, reduce the speed of the liquid pump and the water pump, and then return to step S2.

[0012] As a preferred solution, the following steps are also included between step S1 and step S2:

[0013] Collect the ambient temperature and determine whether the ambient temperature exceeds the high temperature threshold; if so, enter the high temperature control mode; if not, enter the energy-saving control mode, and then go to step S2.

[0014] As a preferred solution, the energy-saving control mode is: the speed of the dry cooler fan is adjusted to 70-90% of the rated speed, and the speed of the liquid pump and the water pump is adjusted to 60-80% of the rated speed.

[0015] As a preferred solution, the high temperature control mode is as follows: the speed of the dry cooler fan is adjusted to the rated speed, and the speeds of the liquid pump and the water pump are adjusted to 60-80% of the rated speed.

[0016] As a preferred solution, after entering the high temperature control mode, the following steps are also included:

[0017] S20, collecting the temperature T1 of the water side inlet, the temperature T2 of the water side outlet, the temperature T3 of the liquid side inlet, and the temperature T4 of the liquid side outlet of the plate heat exchanger; determining whether the temperature T4 is greater than a fourth preset threshold; if so, proceeding to step S30; if not, proceeding to step S40;

[0018] S30, determining whether the temperature T1 is greater than a fifth preset threshold; if so, increasing the speed of the dry cooler fan, the liquid pump and the water pump, and then returning to step S20; if not, increasing the speed of the water pump, and then returning to step S20;

[0019] S40, determining whether the temperature difference between the liquid side inlet and the liquid side outlet is greater than a sixth preset threshold; if so, proceeding to step S50; if not, proceeding to step S60;

[0020] S50, lowering the speed of the water pump and the dry cooler fan, and then returning to step S20;

[0021] S60, lowering the rotation speed of the liquid pump and the dry cooler fan, and then returning to step S20.

[0022] As a preferred solution, the first preset threshold is 40-50°C, the second preset threshold is 30-40°C, and the third preset threshold is -0.05-0.1.

[0023] As a preferred solution, the high temperature threshold is 28-40°C.

[0024] As a preferred solution, the fourth preset threshold is 40-50°C, the fifth preset threshold is 30-40°C, and the sixth preset threshold is 2-5°C.

[0025] The present invention further provides an energy-saving control system for a liquid cooling device, applying the energy-saving control method described in any of the above schemes, wherein the energy-saving control system comprises:

[0026] An acquisition module, used for acquiring changes in first-order derivatives of temperature T1, temperature T2, temperature T3, temperature T4, and temperature T4 in adjacent acquisition cycles;

[0027] A judgment module, used in the judgment step of the energy-saving control method to obtain a corresponding judgment result;

[0028] The control module is used to execute corresponding subsequent steps according to the judgment result.

[0029] The present invention also provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed on a computer, the computer executes the energy-saving control method as described in any of the above schemes.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) The present invention accurately identifies the operating load of IT equipment through the temperature changes on the liquid side and the water side of the plate heat exchanger, performs energy-saving control according to the operating load conditions, and improves the equipment stability and reliability of the data center;

[0032] (2) By determining the temperature threshold of the liquid side and the first-order derivative of the liquid outlet temperature, the temperature and its temperature change trend can be detected in real time, and prediction and precise control can be achieved;

[0033] (3) Make a preliminary judgment based on the liquid side temperature difference threshold and its temperature difference change, and accurately control the liquid pump, water pump flow and fan speed to achieve energy saving;

[0034] (4) Define external heat dissipation conditions through ambient temperature, and then determine IT equipment load conditions based on liquid outlet temperature, thereby achieving on-demand control and energy-saving control;

[0035] (5) Through three-condition judgment, namely, ambient temperature, liquid side outlet temperature and liquid side first-order derivative judgment, the load and environmental conditions of the liquid side are confirmed, and the control process is accurate under fluctuations;

[0036] (6) By using the ambient temperature, liquid side outlet temperature, water side inlet temperature and the liquid side inlet and outlet temperature difference, different scenarios can be realized and different mode controls can be adopted to accurately judge the operation scenario and thus accurately judge the operation status of the heat exchanger;

[0037] (7) Through periodic cycle detection and judgment, the data center can be online and timely detected and controlled, which improves the effectiveness and timely feedback of intelligent control. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a structural diagram of a liquid cooling device according to Embodiment 1 of the present invention;

[0039] Figure 2 is a flow chart of an energy-saving control method for a liquid cooling device according to Embodiment 1 of the present invention;

[0040] Figure 3 It is a module architecture diagram of the energy-saving control system of the liquid cooling device of Example 1 of the present invention. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings and other implementation methods can be obtained based on these accompanying drawings without creative work.

[0042] Embodiment 1:

[0043] like Figure 1As shown, the liquid cooling equipment of this embodiment includes a liquid cooling cabinet, a plate heat exchanger (referred to as heat exchanger) and a dry cooler (referred to as dry cooler). Among them, the liquid side inlet and liquid side outlet of the plate heat exchanger are respectively connected to the inlet and outlet of the coolant of the liquid cooling cabinet to form a circulating flow path of the coolant (referred to as liquid path), and the circulating flow path of the coolant is provided with a liquid pump; the water side inlet and water side outlet of the plate heat exchanger are respectively connected to the water outlet and water inlet of the dry cooler to form a circulating flow path of the cooling water (referred to as water path), and the circulating flow path of the cooling water is provided with a water pump. The cooling water and the coolant are used for heat exchange to realize the circulating liquid cooling function of the coolant. In addition, a dry cooler fan is configured outside the liquid cooling equipment of this embodiment.

[0044] like Figure 2 As shown, the method for controlling the working state of the plate heat exchanger of this embodiment includes the following steps:

[0045] 1. The cabinet is turned on and running;

[0046] 2. Detect ambient temperature T0;

[0047] 3. Determine whether the ambient temperature T0 reaches the high temperature threshold A, that is, if(f(T0)>A,0,1), where A is 28-40°C; the value of A in this embodiment is 32°C; in addition, "0" represents no, and "1" represents yes, and the following judgments are the same.

[0048] The following will be divided into energy-saving control mode and high temperature control mode for detailed description:

[0049] 1. Energy-saving control mode

[0050] (1) If the ambient temperature T0 ≤ threshold A, it indicates that the ambient temperature is low and the heat dissipation performance is good. Then, the speed of the dry cooler fan (hereinafter referred to as the fan) is preset to 80% of the rated speed Pn, and the liquid pump / water pump is set to 70% of the rated speed, and the energy-saving control mode is entered;

[0051] (2) Then detect the inlet and outlet temperatures T3, T4 on the liquid side and the inlet and outlet temperatures T1, T2 on the water side of the plate heat exchanger;

[0052] (3) Determine whether the liquid outlet temperature T4 is greater than a threshold value M, that is, if(f(T4)>M,0,1), where M ranges from 40 to 50° C. and is 46° C. in this embodiment;

[0053] (4) If the liquid side outlet temperature T4 ≤ threshold M, the IT equipment load capacity is further determined, that is, the first-order derivative of the temperature T4 in the adjacent acquisition period is detected if(f(f(T4))>X, 0, 1), where X ranges from -0.05 to 0.1, and in this embodiment, the value is -0.01;

[0054] If the first-order derivative f(T4)>M, it indicates that the temperature is rising and the IT equipment load is increasing, so continue to detect the inlet and outlet temperatures of the plate heat exchanger;

[0055] If the first-order derivative f(T4)≤M, it indicates that the temperature is decreasing and the IT equipment load is small. Further reduce the speed of the water pump and liquid pump, and then continue to detect the inlet and outlet temperatures of the plate heat exchanger;

[0056] (5) If the liquid side outlet temperature T4 is greater than the threshold value M, whether the water side inlet temperature T1 is abnormal is determined, that is, if (f(T1)>Y, 0, 1), where Y is in the range of 30-40°C and is 36°C in this embodiment.

[0057] If the water side temperature T1 ≤ threshold Y, it indicates that the heat dissipation on the water side is good, but the liquid side temperature is high due to the small water side flow, that is, the water pump speed is +120rpm, and then continue to detect the inlet and outlet temperatures of the plate heat exchanger;

[0058] If the water side temperature T1>threshold Y, it indicates that the heat dissipation on the water side is poor, resulting in a high liquid side temperature. In order to maintain a good heat exchange, the water pump speed is increased by +120rpm, the dry cooler fan (i.e., fan) speed is increased by +300rpm, and then the inlet and outlet temperatures of the plate heat exchanger are continued to be detected.

[0059] 2. High temperature control mode

[0060] (1) If the ambient temperature T0>threshold A, it indicates that the ambient temperature is high and the heat dissipation performance is poor, and then the dry cooler fan speed is preset to the rated speed Pn, and the liquid pump / water pump is set to 70% of the rated speed;

[0061] (2) Then detect the inlet and outlet temperatures T3, T4 on the liquid side and the inlet and outlet temperatures T1, T2 on the water side of the plate heat exchanger;

[0062] (3) Determine whether the liquid outlet temperature T4 is greater than a threshold value N, that is, if(f(T4)>N,0,1), where N is in the range of 40-50° C. and is 45° C. in this embodiment;

[0063] If the liquid side outlet temperature T4 ≤ threshold value N, the load capacity of the IT equipment is further determined, that is, if(f(f(T4-T3))>Z, 0, 1), where the value range of Z is 2-5°C, and the value of this embodiment is 3°C;

[0064] If the temperature difference between the inlet and outlet of the liquid side is ≤ Z, it means that the temperature on the liquid side is decreasing, but the temperature difference is small, that is, the flow rate on the liquid side is too large, then the liquid pump flow rate is -120rpm and the fan speed is 100rpm, and then continue to detect the inlet and outlet temperatures of the plate heat exchanger;

[0065] If the temperature difference between the inlet and outlet of the liquid side is greater than Z, it indicates that the temperature on the liquid side is low and the IT load is low. However, if the temperature difference between the inlet and outlet of the liquid side is large, the water side flow is large and the heat dissipation performance is good. Further reduce the speed of the water pump and fan, and then continue to detect the inlet and outlet temperatures of the plate heat exchanger.

[0066] If the liquid side outlet temperature T4>threshold N, it is determined whether the water side inlet temperature T1 is abnormal, that is, if(f(T1)>Y,0,1), where Y ranges from 30-40 and is 36°C in this embodiment.

[0067] If the water side temperature T1 ≤ threshold Y, it indicates that the heat dissipation on the water side is good, but the liquid side temperature is high due to the small water side flow, that is, the water pump speed is +240rpm, and then continue to detect the inlet and outlet temperatures of the plate heat exchanger;

[0068] If the water side temperature T1>threshold Y, it indicates that the heat dissipation on the water side is poor, resulting in a high liquid side temperature. In order to maintain better heat exchange, the water pump speed is +120rpm, the liquid pump speed is +120rpm, the fan speed enters the maximum speed Pm, and then the inlet and outlet temperatures of the plate heat exchanger continue to be detected.

[0069] Corresponding to the energy-saving control method of the liquid cooling device described above in this embodiment, Figure 3 As shown, this embodiment also provides an energy-saving control system for liquid cooling equipment, including a setting module, a collection module, a judgment module and a control module.

[0070] Among them, the setting module is used to set all thresholds, which is convenient for freely adjusting the threshold settings.

[0071] The acquisition module is used to collect all detected temperatures, temperature differences and first-order derivative changes of temperature, specifically including temperature T1, temperature T2, temperature T3, temperature T4, temperature difference T4-T3, and first-order derivative changes of temperature T4 in adjacent acquisition cycles;

[0072] The judgment module is used to execute each judgment step in the above control method to obtain a corresponding judgment result;

[0073] The control module is used to execute corresponding subsequent steps according to the judgment result.

[0074] The specific execution process of the above modules can refer to the detailed description of the above energy-saving control method, which will not be repeated here.

[0075] This embodiment further provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed on a computer, the computer executes the energy-saving control method described in the embodiment above.

[0076] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, according to the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. An energy-saving control method for a liquid cooling device, the liquid cooling device comprising a liquid cooling cabinet, a plate heat exchanger and a dry cooler, the liquid side inlet and the liquid side outlet of the plate heat exchanger are respectively connected to the inlet and outlet of the cooling liquid of the liquid cooling cabinet to form a circulation flow path of the cooling liquid, and the circulation flow path of the cooling liquid is provided with a liquid pump; the water side inlet and the water side outlet of the plate heat exchanger are respectively connected to the water outlet and the water inlet of the dry cooler to form a circulation flow path of the cooling water, and the circulation flow path of the cooling water is provided with a water pump; characterized in that, The energy-saving control method comprises the following steps: S1, liquid cooling cabinet is turned on and running; Collect the ambient temperature and determine whether the ambient temperature exceeds the high temperature threshold; if so, enter the high temperature control mode and then go to step S20; if not, enter the energy-saving control mode and then go to step S2; The high temperature control mode is as follows: the speed of the dry cooler fan is adjusted to the rated speed, and the speed of the liquid pump and the water pump is adjusted to 60-80% of the rated speed; The energy-saving control mode is: the speed of the dry cooler fan is adjusted to 70-90% of the rated speed, and the speed of the liquid pump and the water pump is adjusted to 60-80% of the rated speed; S2, collecting the temperature T1 of the water side inlet, the temperature T2 of the water side outlet, the temperature T3 of the liquid side inlet, and the temperature T4 of the liquid side outlet of the plate heat exchanger; judging whether the temperature T4 is greater than the first preset threshold; if so, go to step S3; if not, go to step S4; S3, determining whether the temperature T1 is greater than a second preset threshold; if so, increasing the speed of the dry cooler fan and the water pump, and then returning to step S2; if not, increasing the speed of the water pump, and then returning to step S2; S4, determining whether the first-order derivative change of the temperature T4 in the adjacent acquisition period is greater than a third preset threshold; if so, returning to step S2; if not, lowering the speed of the liquid pump and the water pump, and then returning to step S2; S20, collecting the temperature T1 of the water side inlet, the temperature T2 of the water side outlet, the temperature T3 of the liquid side inlet, and the temperature T4 of the liquid side outlet of the plate heat exchanger; determining whether the temperature T4 is greater than a fourth preset threshold; if so, proceeding to step S30; if not, proceeding to step S40; S30, determining whether the temperature T1 is greater than a fifth preset threshold; if so, increasing the speed of the dry cooler fan, the liquid pump and the water pump, and then returning to step S20; if not, increasing the speed of the water pump, and then returning to step S20; S40, determining whether the temperature difference between the liquid side inlet and the liquid side outlet is greater than a sixth preset threshold; if so, proceeding to step S50; if not, proceeding to step S60; S50, lowering the speed of the water pump and the dry cooler fan, and then returning to step S20; S60, lowering the speed of the liquid pump and the dry cooler fan, and then returning to step S20; The first preset threshold is 40-50°C, the second preset threshold is 30-40°C, and the third preset threshold is -0.05-0.1; The high temperature threshold is 28-40°C; The fourth preset threshold is 40-50°C, the fifth preset threshold is 30-40°C, and the sixth preset threshold is 2-5°C.

2. An energy-saving control system for liquid cooling equipment, using the energy-saving control method as claimed in claim 1, characterized in that: The energy-saving control system comprises: An acquisition module, used for acquiring changes in first-order derivatives of temperature T1, temperature T2, temperature T3, temperature T4, and temperature T4 in adjacent acquisition cycles; A judgment module, used in the judgment step of the energy-saving control method to obtain a corresponding judgment result; The control module is used to execute corresponding subsequent steps according to the judgment result.

3. A computer-readable storage medium, wherein instructions are stored in the computer-readable storage medium, characterized in that: When the instructions are executed on a computer, the computer is enabled to execute the energy-saving control method as claimed in claim 1 .

Images