CN-121604374-B - Layered micro-channel liquid cooling method and system based on magnetic interface

CN121604374BCN 121604374 BCN121604374 BCN 121604374BCN-121604374-B

Abstract

The invention discloses a layered microchannel liquid cooling method and system based on a magnetic interface, and relates to the technical field of microchannel liquid cooling structures. The layered micro-channel liquid cooling method and system based on the magnetic interface comprise the steps of S1, collecting and preprocessing temperature characteristic data and fluid flow velocity and pressure data, constructing a standardized heat load trend data set, S2, evaluating the supply state of cooling liquid of each layer, dynamically adjusting the liquid supply rhythm of the corresponding layer, S3, analyzing the cooling demand intensity of each layer, driving the working frequency change of a branch pump of the corresponding layer, S4, evaluating the coordination state from liquid supply of each layer to heat dissipation to liquid return, and dynamically adjusting a liquid cooling control strategy. The method solves the problems that in the multi-layer server structure, the existing liquid cooling distribution path can not realize dynamic flow adjustment according to the heat load difference of each layer of equipment, so that the distribution of cooling resources is uneven and the energy consumption is seriously wasted.

Inventors

SUN HAIWANG
WANG XINGHAO
LI XUEQIANG
LIU SHENGCHUN
ZHANG ZHIQIANG
LIU XINGNAN
YIN YONGQI

Assignees

天津提尔科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260129

Claims (9)

1. The layered micro-channel liquid cooling method based on the magnetic interface is characterized by comprising the following steps: S1, acquiring temperature characteristic data and fluid flow velocity pressure data in the running process of each layer of server, preprocessing the acquired temperature characteristic data and fluid flow velocity pressure data, and constructing a standardized thermal load trend data set; The specific steps of collecting temperature characteristic data and fluid flow velocity pressure data in the running process of each layer of server are as follows: Collecting temperature characteristic data in the running process of each layer of server, wherein the temperature characteristic data comprise real-time surface temperature, inlet cooling liquid temperature, outlet cooling liquid temperature and hot spot temperature peak values of each layer of two-phase cold plates (4), and simultaneously calculating and recording temperature average values, instantaneous temperature differences at inlets and outlets and temperature standard deviations of each layer of two-phase cold plates (4); calculating the temperature difference between the temperature of the inlet cooling liquid and the temperature of the outlet cooling liquid corresponding to each moment to form a temperature difference sequence, and extracting the difference between the maximum temperature value and the minimum temperature value in the temperature difference sequence to be recorded as the temperature fluctuation intensity; Collecting fluid flow speed and pressure data in the running process of each layer of server, wherein the fluid flow speed and pressure data comprise a liquid return flow speed value of a liquid return port of a condenser, an inlet cooling liquid flow speed value, an outlet cooling liquid flow speed value, inlet cooling liquid pressure and outlet cooling liquid pressure of each layer of two-phase cold plates (4), and simultaneously calculating and recording cooling liquid pressure difference between an inlet and an outlet; s2, carrying out supply state evaluation on the supply states of the cooling liquid of each layer by combining the flow rate of the cooling liquid based on a standardized heat load trend data set, and dynamically adjusting the supply rhythm of the corresponding layer based on a supply state evaluation result; s3, carrying out demand analysis on the cooling demand intensity of each layer based on a standardized heat load trend data set, and driving the working frequency change of the branch pump of the corresponding layer based on a demand analysis result so as to match the liquid supply output; And S4, taking a supply state evaluation result and a demand analysis result as inputs, evaluating the coordination state from the liquid supply process to the heat dissipation process to the liquid return process of each layer, and dynamically adjusting the liquid cooling control strategy based on the evaluation result.
2. The method for cooling a layered micro-channel liquid based on a magnetic interface according to claim 1, wherein the method comprises the specific steps of preprocessing the collected temperature characteristic data and fluid flow velocity pressure data to construct a standardized thermal load trend data set: For the fluid flow velocity pressure data, denoising the extreme value, eliminating abnormal data points caused by instantaneous fluctuation and acquisition jitter, and uniformly filling time stamp dislocation data caused by temporary packet loss by adopting a linear interpolation mode; And carrying out unified normalization processing on the temperature characteristic data and the fluid flow velocity pressure data which are subjected to synchronous correction, and constructing a standardized thermal load trend data set.
3. The method for cooling a layered micro-channel liquid based on a magnetic interface according to claim 1, wherein the specific step of evaluating the supply state of each layer of cooling liquid based on the standardized thermal load trend data set by combining the flow rate of the cooling liquid is as follows: dividing the flow velocity value of the inlet cooling liquid of the current layer of two-phase cold plate (4) by the cooling liquid pressure difference between the inlets and the outlets to obtain a flow adaptation value; taking the reciprocal of the temperature average value of the current layer two-phase cold plate (4) to obtain the reciprocal of the temperature average value; multiplying the temperature fluctuation intensity by a corresponding temperature change modulation coefficient to obtain an equivalent thermal fluctuation intensity value, adding one to the equivalent thermal fluctuation intensity value, and taking the reciprocal to obtain a thermal disturbance attenuation value; And multiplying the flow adaptation value, the temperature mean value reciprocal and the thermal disturbance attenuation value, and then adding a logarithm to obtain a liquid supply sufficiency evaluation value.
4. The method for cooling a layered micro-channel liquid based on a magnetic interface of claim 3, wherein the step of dynamically adjusting the liquid supply rhythm of the corresponding layer based on the evaluation result of the supply state comprises the following steps: And comparing the liquid supply sufficiency evaluation value of the current layered two-phase cold plate (4) with a sufficiency evaluation threshold value in real time: when the liquid supply sufficiency evaluation value is smaller than or equal to the sufficiency evaluation threshold value, a branch pump at the corresponding cross beam is automatically driven to lift and extract the flow, the flow of the cooling liquid distributed to the current layer of micro-channels through the main flow channels of the upright post (3) is lifted, the contact pressure of the current layer of magnetic interface is synchronously adjusted to keep stable attachment of the liquid metal contact, and meanwhile, the top condenser (1) is triggered to accelerate switching of a liquid return path; when the liquid supply sufficiency evaluation value is larger than the sufficiency evaluation threshold value, the running frequency of the branch pump at the current layer is reduced, the inflow amount of the cooling liquid is reduced, the liquid return channel is switched to the buffer branch of the liquid storage box body (2), meanwhile, the conduction state of the steam pipeline (8) is kept, and the overall balance of the circulation of each layer is maintained.
5. The method for cooling a layered micro-channel liquid based on a magnetic interface according to claim 4, wherein the specific step of analyzing the cooling requirement intensity of each layer based on the standardized thermal load trend data set is as follows: dividing the acquired difference value of the cooling liquid pressure by the flow velocity value of the outlet cooling liquid to obtain the actual flow resistance value of the micro-channel of the two-phase cooling plate (4), and simultaneously recording and calculating the flow resistance average value of each layer of the two-phase cooling plate (4); dividing the difference value of the hot spot temperature peak value minus the temperature average value by the sum of the temperature standard deviation plus one to obtain a thermal driving intensity value, squaring the thermal driving intensity value and then adding one to obtain a logarithm to obtain a thermal driving response value; Calculating the absolute value of the difference between the actual flow resistance value and the flow resistance average value, multiplying the absolute value by a flow resistance fluctuation adjusting factor, and then obtaining the square root to obtain a flow resistance deviation term, wherein the flow resistance fluctuation adjusting factor is in a value range of 0.5 to 1.2 and is used for controlling the dynamic coupling influence of the micro-flow resistance change of the channel on the target frequency calculation value and is derived from the deviation degree and the change rate between the actual flow resistance of the current micro-channel group and the historical sliding window average value; dividing the pressure fluctuation compensation factor by a value obtained by adding one to the cooling liquid pressure difference to obtain a pressure difference compensation term, wherein the value of the pressure fluctuation compensation factor ranges from 0.8 to 1.5, and the pressure fluctuation compensation factor is used for compensating pressure response fluctuation caused by cooling liquid flow disturbance caused by cold and hot liquid alternation in a channel and is derived from the change relation between the peak difference value and the duration of the fluctuation amplitude of the cooling liquid pressure between an inlet and an outlet of a two-phase plate; and subtracting the flow resistance offset term from the thermal drive response value, and adding the thermal drive response value and the differential pressure compensation term to obtain the target frequency value of the branch pump.
6. The method for cooling a layered micro-channel liquid based on a magnetic interface according to claim 5, wherein the step of driving the operation frequency of the corresponding layer branch pump to vary to match the liquid supply output based on the result of the demand analysis comprises the steps of: Based on the calculation result of the target frequency value of the branch pump, the target frequency value of the branch pump is automatically sent to the diaphragm branch pump at the connection position of the cross beam and the upright post (3), and the diaphragm branch pump is directly driven to supply pulse liquid according to the branch pump; in the operation of the branch pump, when the target frequency value of the branch pump continuously rises, the layer where the current two-phase cold plate (4) is positioned is identified as a high heat load area, the linkage condenser (1) opens an auxiliary liquid return sub-channel, so that the condensation efficiency of top steam is accelerated, the heat accumulation degree is lightened, meanwhile, the cooling liquid outlet pipe (7) records real-time temperature change, the basic liquid supply rate of the main circulating pump is dynamically updated according to the real-time temperature change, and the liquid flow proportion sent from the liquid storage tank body is redistributed; When the target frequency value of the branch pump continuously drops, the single-time starting duration of the branch pump is shortened, the instant flow distribution proportion of each layer is automatically adjusted based on the real-time fluid flow velocity pressure data of the two-phase cold plates (4) of each layer, the actual liquid supply quantity of each layer is adjusted under the condition that the total flow of a main flow channel is kept unchanged, the liquid supply quantity of the two-phase cold plate layers with the instantaneous temperature difference of an inlet and an outlet smaller than a temperature difference threshold is reduced, the liquid supply quantity of the two-phase cold plate layers with the instantaneous temperature difference of the inlet and the outlet larger than or equal to the temperature difference threshold is increased, and the difference of the flow velocity of the interlayer cooling liquid is eliminated.
7. The method for cooling a layered micro channel liquid based on a magnetic interface according to claim 6, wherein the specific steps of evaluating the coordination state from the liquid supply to the heat dissipation to the liquid return of each layer by taking the evaluation result of the supply state and the analysis result of the demand as inputs are as follows: The instantaneous temperature difference of the inlet and outlet of the two-phase cold plate (4) is added with one natural logarithm and then multiplied by a square value obtained by subtracting the target frequency value of the branch pump to obtain a coordinated driving strength value; Dividing the square value of the liquid return flow rate of the liquid return port of the condenser (1) by the value of the inlet cooling liquid pressure at the inlet of the one-to-two phase cooling plate (4), adding the square value with the liquid supply sufficiency evaluation value, and adding a natural logarithm to obtain a coordinated absorption capacity value; dividing the coordination driving intensity value by the coordination absorbing capacity value to obtain a closed-loop coordination evaluation value.
8. The method for cooling a layered micro-channel liquid based on a magnetic interface according to claim 7, wherein the step of dynamically adjusting the liquid cooling control strategy based on the evaluation result comprises the following steps: Comparing the current closed loop coordination evaluation value with a coordination evaluation threshold in real time, wherein the coordination evaluation threshold comprises a first coordination threshold and a second coordination threshold: When the closed loop coordination evaluation value is smaller than or equal to a second coordination threshold value, immediately triggering a high-frequency emergency liquid supply mode of a two-phase cold plate (4) branch pump, synchronously starting a main bypass branch of a liquid return channel of a condenser (1), forcibly guiding liquid to flow back to enter a beam micro channel preferentially, and recording a cold plate number, a temperature difference value, a pressure difference value and a liquid return speed into an abnormal data buffer zone to be marked as a structure destabilization early warning; When the closed loop coordination evaluation value is larger than the second coordination threshold value and smaller than or equal to the first coordination threshold value, dynamically adjusting the single-time starting time length of the branch pump on the basis of maintaining the target frequency of the current branch pump, and updating the distribution proportion of the basic liquid supply amount of the main circulation pump in parallel, so that the actual flow is enhanced on the premise of keeping stable operation, and simultaneously, the working state monitoring flow of the two-phase cold plate (4) is activated, and the operation rhythm is returned to the main control module in real time; When the closed loop coordination evaluation value is larger than a first coordination threshold value, the branch pump is switched to a low-load regulation mode, the flow distribution ratio is reduced, the effective section of a liquid return channel of the condenser (1) is synchronously contracted, more steam heat flow is guided to be distributed to two adjacent-level two-phase cold plates (4), the current two-phase cold plates (4) are marked as liquid supply supersaturation areas, and core data from liquid supply to temperature rise to liquid return are recorded.
9. A layered microchannel liquid cooling system based on a magnetic interface, which is applied to the layered microchannel liquid cooling method based on the magnetic interface as set forth in any one of claims 1 to 8, and is characterized by comprising the following steps: the multi-layer heat load dynamic acquisition module is used for acquiring temperature characteristic data and fluid flow velocity pressure data in the running process of each layer of server, preprocessing the acquired temperature characteristic data and fluid flow velocity pressure data, and constructing a standardized heat load trend data set; the branch flow response evaluation module is used for carrying out supply state evaluation on the supply state of the cooling liquid of each layer based on the standardized heat load trend data set and combining the flow rate of the cooling liquid, and dynamically adjusting the supply rhythm of the corresponding layer based on the result of the supply state evaluation; The branch pump regulation and control cooperative module is used for carrying out demand analysis on the cooling demand intensity of each layer based on the standardized thermal load trend data set and driving the working frequency change of the branch pump of the corresponding layer to match the liquid supply output based on the demand analysis result; And the closed loop liquid supply regulation feedback module is used for taking a supply state evaluation result and a demand analysis result as input, evaluating the coordination state of the process from liquid supply to heat dissipation to liquid return of each layer, and dynamically regulating the liquid cooling control strategy based on the evaluation result.

Description

Layered micro-channel liquid cooling method and system based on magnetic interface Technical Field The invention relates to the technical field of micro-channel liquid cooling structures, in particular to a layered micro-channel liquid cooling method and system based on a magnetic interface. Background Along with the continuous expansion of the scale of high-performance computing equipment, data centers and artificial intelligence training clusters, the power consumption density and heat flux of electronic components continue to rise, and the cabinet-level thermal management requirements are gradually upgraded from traditional air cooling or single pipeline liquid cooling to efficient, layered and intelligent liquid cooling paths. In practical application, the multi-layer server structure can directly perform liquid cooling and heat dissipation on processors, storage modules and high-speed interfaces at different levels through layered cold plate micro-channels, and meanwhile, by combining multi-source sensors such as temperature, flow speed and pressure, the heat load change, liquid supply state and liquid return smoothness degree of each layer are sensed in real time, so that the running state dynamic monitoring of the cross-level and full-flow inside the cabinet is realized. Especially in a multi-layer structure, the operation and maintenance concern points are gradually expanded from single integral heat dissipation capability to joint analysis of heat exchange efficiency of each layer of cold plate, stability of evaporation and condensation links and reasonability of interlayer liquid supply resource allocation. For example, the invention patent with publication number CN114126357B relates to the field of a dual-phase liquid cooling microchannel, and specifically discloses a dual-phase liquid cooling microchannel, a manufacturing method thereof and a server thereof, wherein the dual-phase liquid cooling microchannel comprises a microchannel body, a porous structure is arranged in the microchannel body, the height of the porous structure decreases from an inlet to an outlet of the microchannel body, and the upper surface curve of the porous structure is parabolic, so that the gas phase space in the microchannel increases from the inlet to the outlet. The invention can avoid the phenomenon of rapid increase of gas phase flow velocity and pressure, eliminate gas lock, reduce pressure oscillation of two-phase flow, strengthen heat transfer and improve the stability of the system. For example, patent publication number CN109068538B discloses a liquid cooling radiator structure based on diamond micro-flow channels, which comprises a diamond substrate and a diamond epitaxial layer which are stacked, wherein a plurality of diamond micro-flow channels with a certain interval are arranged in the diamond substrate, and the diamond epitaxial layer is used for bonding an object to be cooled on the surface of the diamond substrate. The invention also discloses a manufacturing method of the radiator, which solves the problem that the traditional radiating fin cannot be applied to extreme environments such as high temperature, high radiation, strong corrosion and the like. However, the flow distribution of the current liquid cooling system depends on an external shunt pipeline or centralized water distribution with a fixed proportion, so that accurate adjustment is difficult to be performed according to the dynamic difference of heat loads of all layers, and the liquid supply-heat dissipation-liquid return full-link closed loop coordination analysis capability combined with real-time measurement data is lacking, so that the phenomenon of over-supply or under-supply of cooling resources exists at part of the hierarchy, the energy consumption is increased, and the overall heat dissipation efficiency is reduced. In addition, for the conditions of temperature fluctuation, flow resistance change, liquid return delay and the like caused by task load change in operation, a regulating and controlling mechanism capable of adaptively responding in a hierarchy is lacking, and the fine management level of the layered liquid cooling system is further limited. In view of the above, there is a need for a layered microchannel liquid cooling method and system based on magnetic interfaces. Disclosure of Invention Technical problem to be solved Aiming at the defects of the prior art, the invention provides a layered micro-channel liquid cooling method and a layered micro-channel liquid cooling system based on a magnetic interface, which solve the problems that in a multi-layer server structure, the existing liquid cooling distribution path can not realize dynamic flow adjustment according to the heat load difference of each layer of equipment, so that the distribution of cooling resources is uneven and the energy consumption is seriously wasted. Technical proposal The layered micro-channel liquid cooling method and system based on the m