CN113597215B - System, method and device for adjusting flow of parallel branch of two-phase cold plate liquid cooling system - Google Patents
System, method and device for adjusting flow of parallel branch of two-phase cold plate liquid cooling system Download PDFInfo
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- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
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- H05K7/00—Constructional details common to different types of electric apparatus
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- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
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- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
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Abstract
The invention provides a system, a method and a device for adjusting the flow of a parallel branch of a dual-phase cold plate liquid cooling system, wherein the system comprises a circulating pump, a preheater, a condenser, a dual-phase cold plate liquid cooling parallel branch, a control module and a data acquisition module; the circulating pump is connected with the preheater and the condenser; the dual-phase cold plate liquid cooling parallel branch comprises a plurality of cooling branches which are connected with the preheater and the condenser; each cooling branch is provided with an electric valve and a plurality of evaporators respectively, and the evaporators are provided with temperature sensors; the electric valve is connected with each evaporator in series to form a cooling branch, and an enthalpy value transmitter and a pressure transmitter are also connected in series at an outlet of each evaporator in the cooling branch; the data acquisition module is connected with the temperature sensor, the enthalpy transmitter and the pressure transmitter; the control module is connected with the circulating pump, the data acquisition module and the electric valve. The invention realizes the accurate control of the flow of each liquid cooling branch, can control the flow in advance by adjusting the rotating speed of the circulating pump according to the load power consumption, and avoids the delay effect.
Description
Technical Field
The invention belongs to the technical field of data center heat dissipation, and particularly relates to a system, a method and a device for adjusting the flow of a parallel branch of a double-phase cold plate liquid cooling system.
Background
With the development of cloud computing and big data, the data center develops rapidly, the PUE of the data center is required to be updated, and the power density of a single cabinet is higher and higher to meet the increasing computing power requirement. In the next five years, 40kW cabinets will become mainstream and air-cooled systems are approaching their economically efficient refrigeration limits when the power density of a single cabinet reaches 20 kW. Under the background, a liquid cooling data center heat dissipation technology with low PUE and high heat density comes into force. The heat is taken away fast to biphase cold plate formula liquid cooling utilization working medium's vaporization phase transition latent heat, has higher cooling efficiency undoubtedly, and the phase transition latent heat is far greater than the sensible heat simultaneously, and the circulation working medium flow is littleer, and the consumption of circulating pump is lower, must have lower PUE value. However, when the dual-phase cold plate liquid cooling system has multiple parallel branches, the flow distribution is difficult, the system has the condition that the branch thermal load is larger, the dryness is higher, the flow resistance is higher, the flow is smaller, and the heat dissipation risks such as 'dry burning' exist. Dryness is the ratio of the mass of steam to the total mass. From the temperature control, the negative feedback phenomenon that the flow is smaller on the contrary when the thermal load of the branch is larger is very easy to cause the oscillation and even the divergence of a temperature curve, and finally the CPU is subjected to frequency reduction and even high-temperature shutdown protection, so that the reliability of the system is greatly reduced.
The flow regulation of the parallel branch of the existing two-phase cold plate liquid cooling system is mainly realized by flow and load temperature, and the regulation method depends on a flow meter and load temperature values. The two-phase flow has too large detection deviation of the flow meter due to complex flow state, often difficult to achieve ideal regulation effect, easy to induce air lock of different degrees, further causing circulation stagnation of the system of different degrees, and affecting the stability and robustness of the system. Meanwhile, the load temperature value has an unavoidable delay effect, and when the temperature is found to be close to a threshold value, the load is often delayed to be adjusted in time, so that the load is lowered in frequency, even the system is down, and the reliability of the system is greatly reduced.
Therefore, it is very necessary to provide a system, a method and a device for adjusting the flow rate of the parallel branch of the dual-phase cold plate liquid cooling system to overcome the above-mentioned drawbacks in the prior art.
Disclosure of Invention
The invention provides a system, a method and a device for adjusting the flow of parallel branches of a dual-phase cooling plate liquid cooling system, aiming at the defects that the flow adjustment of the parallel branches of the dual-phase cooling plate liquid cooling system in the prior art depends on the flow and the load temperature, the adjustment effect is poor, the dry burning phenomenon is easy to occur, the air plug is induced, the load temperature is delayed, and finally the load frequency reduction and even downtime risk is caused.
In a first aspect, the invention provides a system for adjusting the flow of a parallel branch of a dual-phase cooling plate liquid cooling system, which comprises a circulating pump, a preheater, a condenser, a dual-phase cooling plate liquid cooling parallel branch, a control module and a data acquisition module;
the first end of the circulating pump is connected with the preheater, and the second end of the circulating pump is connected with the condenser;
the dual-phase cold plate liquid cooling parallel branch comprises a plurality of cooling branches, and the first ends of the cooling branches are connected and connected with the preheater; the second ends of the cooling branches are connected and connected with a condenser;
each cooling branch is provided with an electric valve and a plurality of evaporators respectively, and the evaporators are provided with temperature sensors;
the electric valve is connected with each evaporator in series to form a cooling branch, and an enthalpy value transmitter and a pressure transmitter are also connected in series at an outlet of each evaporator in the cooling branch;
the data acquisition module is connected with the temperature sensor, the enthalpy transmitter and the pressure transmitter;
the control module is connected with the circulating pump, the data acquisition module and the electric valve.
Further, the control module detects real-time power consumption of each cooling branch in the two-phase liquid cooling parallel branches, calculates the working flow required by the circulating pump according to the real-time power consumption, and adjusts the rotating speed of the circulating pump according to the working flow required by the circulating pump;
the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch of the dual-phase liquid cooling parallel branch, calculates the dryness value of the outlet of each evaporator according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusts the opening of the electric valve in the corresponding cooling branch according to the dryness value of the outlet of the evaporator in each cooling branch. The control module acquires the temperature value of the temperature sensor through the data acquisition module, so that the power consumption of the evaporator is calculated; and the control module acquires values of the enthalpy value transmitter and the pressure transmitter through the data acquisition module.
Furthermore, a high-heat element is arranged in the data center cabinet, and the evaporator is attached to the high-heat element. And selecting whether to arrange the evaporator at the corresponding high-heat element according to the temperature of the high-heat element and the function in the cabinet of the data center.
Further, the high heat element comprises a CPU, a GPU, a memory and a power supply chip. The high heat element includes, but is not limited to, the above components.
In a second aspect, the present invention provides a method for adjusting the flow rate of a parallel branch of a dual-phase cold plate liquid cooling system, comprising the following steps:
s1, detecting real-time power consumption of each cooling branch in a dual-phase liquid cooling parallel branch by a control module, calculating the working flow required by a circulating pump according to the real-time power consumption, and adjusting the rotating speed of the circulating pump according to the working flow required by the circulating pump;
s2, the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch of the two-phase liquid cooling parallel branch, calculates the dryness value of the outlet of each evaporator according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusts the opening of the electric valve in the corresponding cooling branch according to the dryness value of the outlet of the evaporator in each cooling branch.
Further, the step S1 specifically includes the following steps:
s11, the control module acquires the numerical value of the temperature sensor at each evaporator through the data acquisition module and calculates the heat of each evaporator according to the data of the temperature sensor;
s12, the control module calculates real-time power consumption values of the cooling branches according to the heat of the evaporators;
s13, the control module controls the dryness of the outlets of the cooling branches to be consistent, calculates the required flow of the cooling branch with the largest real-time power consumption value, and sets the required flow as the maximum branch flow value;
s14, the control module sets the working flow required by the circulating pump to be the product of the number of the cooling branches and the maximum branch flow value;
s15, the control module obtains flow water resistance curve lines of the circulating pump at different rotating speeds, finds out a maximum curve and a minimum curve according to the working flow required by the circulating pump, and then adjusts the rotating speed of the circulating pump in a space formed by the maximum curve and the minimum curve. The flow value of the maximum branch is multiplied by the number of the cooling branches, so that the required flow can be met by each cooling branch, and a margin is reserved for the whole double-phase cold standby liquid cooling system.
Further, the step S15 specifically includes the following steps:
s151, the control module obtains flow water resistance curve lines of the circulating pump at different rotating speeds;
s152, the control module searches out a maximum curve and a minimum curve according to the working flow required by the circulating pump, and obtains a first rotating speed corresponding to the maximum curve and a second rotating speed corresponding to the minimum curve;
s153, the control module obtains the real-time rotating speed of the circulating pump and judges whether the real-time rotating speed of the circulating pump is in an interval between the first rotating speed and the second rotating speed;
if yes, judging that the rotating speed of the circulating pump meets the flow demand of the liquid cooling system of the dual-phase cold plate, and entering the step S2;
if not, go to step S154;
and S154, the control module adjusts the real-time rotating speed of the circulating pump and returns to the step S11. The control module controls the real-time rotating speed of the circulating pump to fall in the area between the maximum curve and the minimum curve, so that the flow demand is guaranteed.
Further, the step S2 specifically includes the following steps:
s21, the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch and calculates the dryness value of the outlet of each evaporator;
s22, the control module judges whether the dryness value at the outlet of the evaporator at the tail end of each cooling branch meets a dryness threshold value;
if yes, go to step S23;
if not, positioning a cooling branch with the dryness fraction value not meeting the dryness fraction threshold value at the outlet of the evaporator at the tail end, setting the cooling branch as a cooling branch to be adjusted, and entering the step S24;
s23, the control module judges whether a shutdown instruction exists in the data center cabinet;
if yes, ending;
if not, returning to the step S1;
s24, the control module adjusts the opening degree of the electric valve in the cooling branch to be adjusted and returns to the step S21. And controlling the dryness value at the outlet of the module evaporator so as to prevent the evaporator from being burnt dry to cause negative feedback and finally cause the risk of downtime of the data center cabinet.
Further, in step S22, when none of the evaporator outlet dryness values connected in series in the same cooling branch does not satisfy the dryness threshold, the dryness value of the evaporator outlet at the end of the cooling branch is preferentially satisfied.
The third aspect provides a device of adjusting the parallelly connected branch road flow of biphase cold plate liquid cooling system, includes:
the circulating pump rotating speed adjusting module is used for detecting the real-time power consumption of each cooling branch in the two-phase liquid-cooling parallel branch by the control module, calculating the working flow required by the circulating pump according to the real-time power consumption, and adjusting the rotating speed of the circulating pump according to the working flow required by the circulating pump;
and the electric valve adjusting module is used for acquiring values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch of the dual-phase liquid cooling parallel branch by the control module, calculating the dryness value of the outlet of each evaporator according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusting the opening of the electric valve in the corresponding cooling branch according to the dryness value of the outlet of the evaporator in each cooling branch.
Further, the circulating pump rotating speed adjusting module comprises:
the evaporator heat calculating unit is used for acquiring the numerical value of the temperature sensor at each evaporator by the control module through the data acquisition module and calculating the heat of each evaporator according to the data of the temperature sensor;
the cooling branch power consumption calculation unit is used for calculating the real-time power consumption value of each cooling branch by the control module according to the heat of each evaporator;
the maximum branch required flow calculation unit is used for controlling the dryness of the outlets of the cooling branches to be consistent by the control module, calculating the required flow of the cooling branch with the maximum real-time power consumption value, and setting the required flow as the maximum branch flow value;
the circulating pump required working flow setting unit is used for setting the working flow required by the circulating pump as the product of the number of the cooling branches and the maximum branch flow value by the control module;
and the circulating pump rotating speed adjusting unit is used for acquiring the flow water resistance curve line of the circulating pump at different rotating speeds by the control module, finding out a maximum curve and a minimum curve according to the required working flow of the circulating pump, and adjusting the rotating speed of the circulating pump in a space formed by the maximum curve and the minimum curve.
Further, the electrically operated valve trim module includes:
the evaporator dryness value calculation unit is used for acquiring values of an enthalpy transmitter and a pressure transmitter of each evaporator outlet in each cooling branch by the control module and calculating dryness values of each evaporator outlet;
the dryness value judging unit is used for judging whether the dryness value at the outlet of the evaporator at the tail end of each cooling branch meets a dryness threshold value or not by the control module;
the to-be-adjusted branch setting unit is used for positioning the cooling branch of which the dryness value at the outlet of the evaporator at the tail end does not meet the dryness threshold when the dryness value at the outlet of the evaporator at the tail end of the cooling branch does not meet the dryness threshold, and setting the cooling branch as the to-be-adjusted branch;
the shutdown instruction judging unit is used for judging whether a shutdown instruction exists in the data center cabinet or not by the control module when the dryness values at the outlets of the evaporators at the tail ends of the cooling branches all meet the dryness threshold value;
and the electric valve opening adjusting unit is used for adjusting the opening of the electric valve in the cooling branch to be adjusted by the control module.
The beneficial effect of the invention is that,
the system, the method and the device for adjusting the flow of the parallel branch of the dual-phase cooling plate liquid cooling system provided by the invention realize the accurate control of the flow of the parallel branch of the dual-phase cooling plate liquid cooling system, avoid the poor adjustment effect caused by too large deviation of a two-phase flow flowmeter, and can adjust the rotating speed of a circulating pump in advance according to the load power consumption so as to control the flow, avoid the delay effect and greatly improve the reliability and the safety of the system.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a system for regulating the flow of parallel branches of a two-phase cold plate liquid cooling system according to the present invention.
Fig. 2 is a control schematic diagram of the system for adjusting the flow of the parallel branch of the two-phase cold plate liquid cooling system according to the present invention.
Fig. 3 is a schematic flow chart of a method for adjusting the flow of the parallel branch of the two-phase cold plate liquid cooling system according to the present invention.
Fig. 4 is a schematic flow chart of a method for adjusting the flow of the parallel branch of the two-phase cold plate liquid cooling system according to the present invention.
FIG. 5 is a schematic diagram of the apparatus for regulating the flow of the parallel branch of the two-phase cold plate liquid cooling system according to the present invention.
In the figure, 1-circulation pump; 2-a preheater; 3-a condenser; 4-a control module; 5-a data acquisition module; 6-an electric valve; 7-an evaporator; 7.1-CPU evaporator; 7.2-GPU evaporator; 8-a temperature sensor; 8.1 — a first temperature sensor; 8.2-a second temperature sensor; a 9-enthalpy transmitter; 9.1-a first enthalpy transmitter; 9.2-a second enthalpy transmitter; 10-a pressure transmitter; 10.1-a first pressure transmitter; 10.2-a second pressure transmitter; 11-a circulating pump rotating speed adjusting module; 11.1-evaporator heat calculation unit; 11.2-cooling branch power consumption calculating unit; 11.3-a flow calculation unit required by the maximum branch; 11.4-setting unit of working flow needed by the circulating pump; 11.5-a circulating pump rotating speed adjusting unit; 12-an electrically operated valve adjustment module; 12.1-evaporator dryness value calculating unit; 12.2-dryness fraction judging unit; 12.3-a branch setting unit to be adjusted; 12.4-a shutdown instruction judgment unit; 12.5-an electric valve opening degree adjusting unit.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
as shown in fig. 1 and fig. 2, the present invention provides a system for adjusting the flow of a parallel branch of a dual-phase cold plate liquid cooling system, which includes a circulation pump 1, a preheater 2, a condenser 3, a dual-phase cold plate liquid cooling parallel branch, a control module 4 and a data acquisition module 5;
the first end of the circulating pump 1 is connected with the preheater 2, and the second end of the circulating pump 1 is connected with the condenser 3;
the two-phase cold plate liquid cooling parallel branch comprises a plurality of cooling branches, and the first ends of the cooling branches are connected and connected with the preheater 2; the second ends of the cooling branches are connected with each other and are connected with a condenser 3;
each cooling branch is provided with an electric valve 6 and a plurality of evaporators 7 respectively, and the evaporators 7 are provided with temperature sensors 8;
the electric valve 6 is connected with each evaporator 7 in series to form a cooling branch, and an enthalpy value transmitter 9 and a pressure transmitter 10 are also connected in series at the outlet of each evaporator 7 in the cooling branch;
the data acquisition module 5 is connected with a temperature sensor 8, an enthalpy transmitter 9 and a pressure transmitter 10;
the control module 4 is connected with the circulating pump 1, the data acquisition module 5 and the electric valve 6.
Example 2:
as shown in fig. 1, the present invention provides a system for adjusting the flow of a parallel branch of a dual-phase cold plate liquid cooling system, which includes a circulation pump 1, a preheater 2, a condenser 3, a dual-phase cold plate liquid cooling parallel branch, a control module 4 and a data acquisition module 5;
the first end of the circulating pump 1 is connected with the preheater 2, and the second end of the circulating pump 1 is connected with the condenser 3;
the dual-phase cold plate liquid cooling parallel branch comprises a plurality of cooling branches, and the first ends of the cooling branches are connected and connected with the preheater 2; the second ends of the cooling branches are connected with each other and are connected with a condenser 3;
each cooling branch is respectively provided with an electric valve 6 and a plurality of evaporators 7, and the evaporators 7 are provided with temperature sensors 8;
the electric valve 6 is connected with each evaporator 7 in series to form a cooling branch, and an enthalpy value transmitter 9 and a pressure transmitter 10 are also connected in series at the outlet of each evaporator 7 in the cooling branch;
as shown in fig. 2, the data acquisition module 5 is connected with a temperature sensor 8, an enthalpy transmitter 9 and a pressure transmitter 10;
the control module 4 is connected with the circulating pump 1, the data acquisition module 5 and the electric valve 6;
a high heat element is arranged in the data center cabinet, and the evaporator 7 is attached to the high heat element; the high-heat element comprises a CPU, a GPU, a memory and a power supply chip;
as shown in fig. 1, three cooling branches are provided in the two-phase liquid-cooling parallel branch, and two evaporators, namely a CPU evaporator 7.1 and a GPU evaporator 7.2, are provided in each cooling branch; the temperature sensor arranged at the CPU evaporator 7.1 is a first temperature sensor 8.1, and the enthalpy transmitter and the pressure transmitter arranged at the outlet of the CPU evaporator 7.1 are a first enthalpy transmitter 9.1 and a first pressure transmitter 10.1 respectively; the temperature sensor arranged at the GPU evaporator 7.2 is a second temperature sensor 8.2, and the enthalpy transmitter and the pressure transmitter arranged at the outlet of the GPU evaporator 7.2 are a second enthalpy transmitter 9.2 and a second pressure transmitter 10.2 respectively;
the control module 4 detects the real-time power consumption of each cooling branch in the two-phase liquid cooling parallel branch, calculates the working flow required by the circulating pump 1 according to the real-time power consumption, and adjusts the rotating speed of the circulating pump 1 according to the working flow required by the circulating pump 1;
the control module 4 collects values of an enthalpy value transmitter 9 and a pressure transmitter 10 at the outlet of each evaporator 7 in each cooling branch of the dual-phase liquid cooling parallel branch, calculates the dryness value of the outlet of each evaporator 7 according to the values of the enthalpy value transmitter 9 and the pressure transmitter 10, and adjusts the opening degree of the electric valve 6 in the corresponding cooling branch according to the dryness value of the outlet of the evaporator 7 in each cooling branch.
Example 3:
as shown in fig. 3, the present invention provides a method for adjusting the flow rate of a parallel branch of a dual-phase cold plate liquid cooling system, comprising the following steps:
s1, detecting real-time power consumption of each cooling branch in a two-phase liquid cooling parallel branch by a control module, calculating the working flow required by a circulating pump according to the real-time power consumption, and adjusting the rotating speed of the circulating pump according to the working flow required by the circulating pump;
s2, the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch of the two-phase liquid cooling parallel branch, calculates the dryness value of the outlet of each evaporator according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusts the opening of the electric valve in the corresponding cooling branch according to the dryness value of the outlet of the evaporator in each cooling branch.
Example 4:
as shown in fig. 4, the present invention provides a method for adjusting the flow rate of a parallel branch of a dual-phase cold plate liquid cooling system, comprising the following steps:
s1, detecting real-time power consumption of each cooling branch in a two-phase liquid cooling parallel branch by a control module, calculating the working flow required by a circulating pump according to the real-time power consumption, and adjusting the rotating speed of the circulating pump according to the working flow required by the circulating pump; the method comprises the following specific steps:
s11, the control module acquires the numerical value of the temperature sensor at each evaporator through the data acquisition module and calculates the heat of each evaporator according to the data of the temperature sensor;
s12, calculating real-time power consumption values of the cooling branches by the control module according to heat of the evaporators;
s13, the control module controls the dryness of the outlets of the cooling branches to be consistent, calculates the required flow of the cooling branch with the largest real-time power consumption value, and sets the required flow as the maximum branch flow value;
s14, setting the working flow required by the circulating pump as the product of the number of the cooling branches and the maximum branch flow value by the control module;
s15, the control module obtains flow water resistance curve lines of the circulating pump at different rotating speeds, finds out a maximum curve and a minimum curve according to the working flow required by the circulating pump, and then adjusts the rotating speed of the circulating pump in a space formed by the maximum curve and the minimum curve;
s2, the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch of the double-phase liquid cooling parallel branch, calculates the dryness value of the outlet of each evaporator according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusts the opening degree of the electric valve in the corresponding cooling branch according to the dryness value of the outlet of the evaporator in each cooling branch; the method comprises the following specific steps:
s21, the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch and calculates the dryness value of the outlet of each evaporator;
s22, the control module judges whether the dryness value of the outlet of the evaporator at the tail end of each cooling branch meets the requirement
A degree threshold;
if yes, go to step S23;
if not, positioning a cooling branch with the dryness fraction value not meeting the dryness fraction threshold value at the outlet of the evaporator at the tail end, setting the cooling branch as a cooling branch to be adjusted, and entering the step S24;
s23, judging whether a shutdown instruction exists in the data center cabinet by the control module;
if yes, ending;
if not, returning to the step S1;
and S24, the control module adjusts the opening degree of the electric valve in the cooling branch to be adjusted and returns to the step S21.
Example 5:
as shown in fig. 3 and fig. 4, the present invention provides a method for adjusting the flow of parallel branches of a dual-phase cooling plate liquid cooling system, comprising the following steps:
s1, detecting real-time power consumption of each cooling branch in a two-phase liquid cooling parallel branch by a control module, calculating the working flow required by a circulating pump according to the real-time power consumption, and adjusting the rotating speed of the circulating pump according to the working flow required by the circulating pump; the method comprises the following specific steps:
s11, the control module acquires the numerical value of the temperature sensor at each evaporator through the data acquisition module and calculates the heat of each evaporator according to the data of the temperature sensor;
s12, the control module calculates real-time power consumption values of the cooling branches according to the heat of the evaporators;
s13, the control module controls the dryness of the outlets of the cooling branches to be consistent, calculates the required flow of the cooling branch with the largest real-time power consumption value, and sets the required flow as the maximum branch flow value;
s14, setting the working flow required by the circulating pump as the product of the number of the cooling branches and the maximum branch flow value by the control module;
s15, the control module obtains flow water resistance curve lines of the circulating pump at different rotating speeds, finds out a maximum curve and a minimum curve according to the working flow required by the circulating pump, and then finds out the maximum curve and the minimum curve
The rotating speed of the circulating pump is adjusted in the formed space; the method comprises the following specific steps:
s151, the control module obtains flow water resistance curve lines of the circulating pump at different rotating speeds;
s152, the control module searches out a maximum curve and a minimum curve according to the working flow required by the circulating pump, and obtains a first rotating speed corresponding to the maximum curve and a second rotating speed corresponding to the minimum curve;
s153, the control module obtains the real-time rotating speed of the circulating pump and judges whether the real-time rotating speed of the circulating pump is in an interval between the first rotating speed and the second rotating speed;
if yes, judging that the rotating speed of the circulating pump meets the flow requirement of the two-phase cold plate liquid cooling system, and entering the step S2;
if not, go to step S154;
s154, the control module adjusts the real-time rotating speed of the circulating pump and returns to the step S11;
s2, the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch of the double-phase liquid cooling parallel branch, calculates the dryness value of the outlet of each evaporator according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusts the opening degree of the electric valve in the corresponding cooling branch according to the dryness value of the outlet of the evaporator in each cooling branch; the method comprises the following specific steps:
s21, collecting values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch by a control module, and calculating dryness values of the outlets of the evaporators;
s22, judging whether the dryness value at the outlet of the evaporator at the tail end of each cooling branch meets a dryness threshold value by the control module; when the dryness values of the outlets of the evaporators connected in series in the same cooling branch do not meet the dryness threshold value, the dryness value of the outlet of the evaporator at the tail end of the cooling branch is preferentially met;
if yes, go to step S23;
if not, positioning a cooling branch with the dryness value not meeting the dryness threshold value at the outlet of the evaporator at the tail end, setting the cooling branch as a cooling branch to be adjusted, and entering the step S24;
s23, judging whether a shutdown instruction exists in the data center cabinet by the control module;
if yes, ending;
if not, returning to the step S1;
and S24, the control module adjusts the opening degree of the electric valve in the cooling branch to be adjusted and returns to the step S21.
Example 6:
as shown in fig. 4, the present invention provides a device for adjusting the flow of parallel branches of a dual-phase cold plate liquid cooling system, comprising:
the circulating pump rotating speed adjusting module 11 is used for detecting the real-time power consumption of each cooling branch in the two-phase liquid cooling parallel branch by the control module, calculating the working flow required by the circulating pump according to the real-time power consumption, and adjusting the rotating speed of the circulating pump according to the working flow required by the circulating pump; the circulation pump rotation speed adjustment module 11 includes:
the evaporator heat calculating unit 11.1 is used for acquiring numerical values of temperature sensors at the evaporators by the control module through the data acquisition module and calculating the heat of the evaporators according to the data of the temperature sensors;
the cooling branch power consumption calculating unit 11.2 is used for calculating the real-time power consumption value of each cooling branch by the control module according to the heat of each evaporator;
the maximum branch required flow calculation unit 11.3 is used for controlling the consistency of the dryness at the outlets of the cooling branches by the control module, calculating the required flow of the cooling branch with the maximum real-time power consumption value, and setting the required flow as the maximum branch flow value;
the required working flow setting unit 11.4 of the circulating pump is used for setting the required working flow of the circulating pump as the product of the number of the cooling branches and the maximum branch flow value by the control module;
the circulating pump rotating speed adjusting unit 11.5 is used for acquiring a flow water resistance curve line of the circulating pump at different rotating speeds by the control module, finding out a maximum curve and a minimum curve according to the working flow required by the circulating pump, and adjusting the rotating speed of the circulating pump in a space formed by the maximum curve and the minimum curve;
the electric valve adjusting module 12 is used for acquiring values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch of the dual-phase liquid cooling parallel branch by the control module, calculating dryness values of the outlets of the evaporators according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusting the opening degree of the electric valve in the corresponding cooling branch according to the dryness values of the outlets of the evaporators in the cooling branches; the electric valve adjusting module 12 includes:
the evaporator dryness value calculating unit 12.1 is used for collecting values of an enthalpy transmitter and a pressure transmitter of each evaporator outlet in each cooling branch by the control module and calculating dryness values of each evaporator outlet;
the dryness value judging unit 12.2 is used for judging whether the dryness value at the outlet of the evaporator at the tail end of each cooling branch meets the dryness threshold value or not by the control module;
a branch to be adjusted setting unit 12.3, configured to locate a cooling branch whose dryness value at the evaporator outlet at the tail end does not meet the dryness threshold when the dryness value at the evaporator outlet at the tail end of the cooling branch does not meet the dryness threshold, and set the cooling branch as the cooling branch to be adjusted;
a shutdown instruction judging unit 12.4, configured to judge, by the control module, whether a shutdown instruction exists in the data center cabinet when the dryness fraction values at the outlets of the evaporators at the ends of the cooling branches all satisfy a dryness fraction threshold;
and the electric valve opening adjusting unit 12.5 is used for adjusting the opening of the electric valve in the cooling branch to be adjusted by the control module.
Although the present invention has been described in detail in connection with the preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions should be within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure and the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. A system for adjusting the flow of a parallel branch of a dual-phase cold plate liquid cooling system is characterized by comprising a circulating pump (1), a preheater (2), a condenser (3), a dual-phase cold plate liquid cooling parallel branch, a control module (4) and a data acquisition module (5);
the first end of the circulating pump (1) is connected with the preheater (2), and the second end of the circulating pump (1) is connected with the condenser (3);
the dual-phase cold plate liquid cooling parallel branch comprises a plurality of cooling branches, and the first ends of the cooling branches are connected and connected with the preheater (2); the second ends of the cooling branches are connected and are connected with a condenser (3);
an electric valve (6) and a plurality of evaporators (7) are respectively arranged on each cooling branch, and a temperature sensor (8) is arranged at each evaporator (7);
the electric valve (6) is connected with each evaporator (7) in series to form a cooling branch, and an enthalpy value transmitter (9) and a pressure transmitter (10) are also connected in series at the outlet of each evaporator (7) in the cooling branch;
the data acquisition module (5) is connected with the temperature sensor (8), the enthalpy transmitter (9) and the pressure transmitter (10);
the control module (4) is connected with the circulating pump (1), the data acquisition module (5) and the electric valve (6);
the control module (4) detects the real-time power consumption of each cooling branch in the two-phase liquid cooling parallel branch, calculates the working flow required by the circulating pump (1) according to the real-time power consumption, and adjusts the rotating speed of the circulating pump (1) according to the working flow required by the circulating pump (1);
the control module (4) collects values of an enthalpy value transmitter (9) and a pressure transmitter (10) at the outlet of each evaporator (7) in each cooling branch of the biphase liquid cooling parallel branch, calculates the dryness value of the outlet of each evaporator (7) according to the values of the enthalpy value transmitter (9) and the pressure transmitter (10), and adjusts the opening degree of an electric valve (6) in the corresponding cooling branch according to the dryness value of the outlet of the evaporator (7) in each cooling branch;
control module (4) detect the real-time power consumption of each cooling branch in the parallelly connected branch road of diphase liquid cooling to calculate the required work flow of circulating pump (1) according to real-time power consumption, again according to required work flow adjustment circulating pump (1) rotational speed of circulating pump (1) include:
the control module (4) collects the numerical values of the temperature sensors at the evaporators (7) through the data collection module (5), and calculates the heat of the evaporators (7) according to the data of the temperature sensors (8);
the control module (4) calculates the real-time power consumption value of each cooling branch according to the heat of each evaporator (7);
the control module (4) controls the dryness of the outlets of the cooling branches to be consistent, calculates the required flow of the cooling branch with the maximum real-time power consumption value, and sets the required flow as the maximum branch flow value;
the control module (4) sets the working flow required by the circulating pump as the product of the number of the cooling branches and the maximum branch flow value;
the control module (4) acquires the flow water resistance curve line of the circulating pump (1) at different rotating speeds, finds out a maximum curve and a minimum curve according to the required working flow of the circulating pump (1), and then adjusts the rotating speed of the circulating pump (1) in a space formed by the maximum curve and the minimum curve.
2. The system for regulating the flow of the parallel branch of a dual phase cold plate liquid cooling system as set forth in claim 1, wherein a high thermal component is disposed in the data center cabinet, and the evaporator (7) is attached to the high thermal component.
3. The system for regulating the flow in a parallel branch of a dual phase cold plate liquid cooling system of claim 2, wherein said high thermal component comprises a CPU, a GPU, a memory, and a power chip.
4. A method for adjusting the flow of a parallel branch of a two-phase cold plate liquid cooling system is characterized by comprising the following steps:
s1, detecting real-time power consumption of each cooling branch in a dual-phase liquid cooling parallel branch by a control module, calculating the working flow required by a circulating pump according to the real-time power consumption, and adjusting the rotating speed of the circulating pump according to the working flow required by the circulating pump; the step S1 comprises the following specific steps:
s11, the control module acquires numerical values of temperature sensors at the evaporators through the data acquisition module and calculates heat of the evaporators according to the data of the temperature sensors;
s12, the control module calculates real-time power consumption values of the cooling branches according to the heat of the evaporators;
s13, the control module controls the dryness of the outlets of the cooling branches to be consistent, the required flow of the cooling branch with the largest real-time power consumption value is calculated, and the required flow is set as the maximum branch flow value;
s14, setting the working flow required by the circulating pump as the product of the number of the cooling branches and the maximum branch flow value by the control module;
s15, the control module obtains flow water resistance curve lines of the circulating pump at different rotating speeds, finds out a maximum curve and a minimum curve according to the working flow required by the circulating pump, and then adjusts the rotating speed of the circulating pump in a space formed by the maximum curve and the minimum curve;
s2, the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch of the two-phase liquid cooling parallel branch, calculates the dryness value of the outlet of each evaporator according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusts the opening of the electric valve in the corresponding cooling branch according to the dryness value of the outlet of the evaporator in each cooling branch.
5. The method for adjusting the flow of the parallel branch of the dual-phase cold plate liquid cooling system according to claim 4, wherein the step S15 comprises the following steps:
s151, the control module obtains flow water resistance curve lines of the circulating pump at different rotating speeds;
s152, the control module searches out a maximum curve and a minimum curve according to the working flow required by the circulating pump, and obtains a first rotating speed corresponding to the maximum curve and a second rotating speed corresponding to the minimum curve;
s153, the control module obtains the real-time rotating speed of the circulating pump and judges whether the real-time rotating speed of the circulating pump is in an interval between the first rotating speed and the second rotating speed;
if yes, judging that the rotating speed of the circulating pump meets the flow demand of the liquid cooling system of the dual-phase cold plate, and entering the step S2;
if not, go to step S154;
and S154, the control module adjusts the real-time rotating speed of the circulating pump and returns to the step S11.
6. The method for regulating the flow of the parallel branch of the dual-phase cold plate liquid cooling system according to claim 4, wherein the step S2 comprises the following steps:
s21, the control module collects values of an enthalpy value transmitter and a pressure transmitter at the outlet of each evaporator in each cooling branch and calculates the dryness value of the outlet of each evaporator;
s22, judging whether the dryness value at the outlet of the evaporator at the tail end of each cooling branch meets a dryness threshold value by the control module;
if yes, go to step S23;
if not, positioning a cooling branch with the dryness value not meeting the dryness threshold value at the outlet of the evaporator at the tail end, setting the cooling branch as a cooling branch to be adjusted, and entering the step S24;
s23, judging whether a shutdown instruction exists in the data center cabinet by the control module;
if yes, ending;
if not, returning to the step S1;
s24, the control module adjusts the opening degree of the electric valve in the cooling branch to be adjusted and returns to the step S21.
7. The method according to claim 6, wherein in step S22, when the dryness values of the outlets of the evaporators connected in series in the same cooling branch do not satisfy the dryness threshold, the dryness value of the outlet of the evaporator at the end of the cooling branch is preferentially satisfied.
8. The utility model provides an adjust device of parallelly connected branch road flow of diphase cold plate liquid cooling system which characterized in that includes:
the circulating pump rotating speed adjusting module (11) is used for detecting the real-time power consumption of each cooling branch in the two-phase liquid cooling parallel branch by the control module, calculating the working flow required by the circulating pump according to the real-time power consumption, and adjusting the rotating speed of the circulating pump according to the working flow required by the circulating pump; the circulating pump rotational speed adjustment module (11) comprises:
the evaporator heat calculating unit is used for acquiring the numerical value of the temperature sensor at each evaporator by the control module through the data acquisition module and calculating the heat of each evaporator according to the data of the temperature sensor;
the cooling branch power consumption calculation unit is used for calculating the real-time power consumption value of each cooling branch by the control module according to the heat of each evaporator;
the maximum branch required flow calculation unit is used for controlling the dryness of the outlets of the cooling branches to be consistent by the control module, calculating the required flow of the cooling branch with the maximum real-time power consumption value, and setting the required flow as the maximum branch flow value;
the circulating pump required working flow setting unit is used for setting the working flow required by the circulating pump as the product of the number of the cooling branches and the maximum branch flow value by the control module;
the circulating pump rotating speed adjusting unit is used for acquiring a flow water resistance curve line of the circulating pump at different rotating speeds by the control module, searching a maximum curve and a minimum curve according to the working flow required by the circulating pump, and adjusting the rotating speed of the circulating pump in a space formed by the maximum curve and the minimum curve;
and the electric valve adjusting module (12) is used for acquiring values of an enthalpy value transmitter and a pressure transmitter of each evaporator outlet in each cooling branch of the dual-phase liquid cooling parallel branch by the control module, calculating dryness values of each evaporator outlet according to the values of the enthalpy value transmitter and the pressure transmitter, and adjusting the opening degree of the electric valve in the corresponding cooling branch according to the dryness values of the evaporator outlets in each cooling branch.
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