A water cooling method that meets the high-rate overload requirements of a networking system

Abstract

The present invention relates to a water cooling method that meets the high-rate overload requirements of a networking system, comprising the following steps: according to the type of power module in a networking type SVG, determine its heat dissipation power when it is in a high-rated current operating state, and select a radiator matching it; set the single module flow of the water cooling system, and obtain the junction temperature of the IGBT in the power module through a simulation test; determine whether the junction temperature of the IGBT exceeds 90°C, if it exceeds, execute step S5, otherwise execute step S6; increase the single module flow, re-obtain the junction temperature of the IGBT through a simulation experiment, and execute S4; calculate the main circulation flow of the water cooling system; calculate the total flow of the water cooling system, and select the type of the main circulation pump; calculate the temperature rise of the cooling medium flowing through the networking type SVG, and select the type of the air cooler. On the basis of matching the cooling capacity corresponding to the networking type device, the present invention increases the flow to meet the operating requirements of short-term overcurrent, improves the overcurrent capacity of the networking type SVG, and improves the stability of the operation of the networking system.

Description

Technical Field

[0001] The present invention belongs to the technical field of water cooling of a grid-connected power system, and in particular relates to a water cooling method that meets the high-rate overload requirements of a grid-connected power system. Background Art

[0002] With the growth of power grid load, the main power supply structure of the power system is evolving, and the proportion of conventional power sources is gradually decreasing. On the one hand, new requirements are put forward for the stability and regulation of the power system; on the other hand, the daily dispatching and operation of the power system is also facing greater operating pressure, so the grid-building technology came into being. The grid-building SVG adopts the grid-building control strategy to build a stable AC electromotive force. Like the synchronous phase regulator, it can provide non-delay synchronous reactive support when the voltage fluctuates, and play a more stable role in the power system.

[0003] Network-type equipment has short-term overcurrent operating conditions. The existing water cooling system is difficult to match the corresponding cooling capacity while meeting the huge flow required when short-term overcurrent occurs. Simply increasing the cooling capacity has the following problems: (1) The water cooling system requires a larger area and has higher requirements for layout space; (2) Excessive cooling capacity causes certain waste, and the full cooling capacity cannot be utilized in long-term operation. Summary of the invention

[0004] The purpose of the present invention is to provide a water cooling method that meets the high-rate overload requirements of a networking system, so as to solve the problem that a water cooling system matching the corresponding cooling capacity is difficult to meet the extremely large flow required when a short-term overcurrent occurs.

[0005] A water cooling method of the present invention that meets the high-rate overload requirement of the network construction system is implemented as follows:

[0006] A water cooling method that meets the high-rate overload requirements of a network construction system comprises the following steps:

[0007] S1: Determine the multiple of the high rated current operation of the grid-type SVG and the operating time range;

[0008] S2: According to the type of power module in the grid-type SVG, determine its heat dissipation power when operating at a high rated current, and select a heat sink that matches it;

[0009] S3: setting the single module flow rate of the water cooling system and performing a simulation test to obtain the junction temperature of the IGBT in the power module;

[0010] S4: Determine whether the junction temperature of the IGBT exceeds 90°C, if so, proceed to step S5, otherwise proceed to step S6;

[0011] S5: Increase the single module flow, re-run the simulation experiment, obtain the junction temperature of the IGBT again, and execute S4;

[0012] S6: Calculate the main circulation flow of the water cooling system according to the single module flow;

[0013] S7: Calculate the total flow of the water cooling system and select the type of main circulation pump according to the total flow;

[0014] S8: Calculate the temperature rise of the cooling medium flowing through the meshed SVG according to the total flow of the water cooling system, and select the number of air coolers according to the temperature rise and the total flow of the water cooling system.

[0015] Furthermore, the single module flow is the cooling medium flow flowing through each radiator in the water cooling system.

[0016] Furthermore, the water cooling system includes a main circulation loop and a deionization branch, and the main circulation flow rate of the cooling medium is the flow rate of the cooling medium flowing through the main circulation loop.

[0017] Furthermore, the main circulation flow of the water cooling system is the superposition of the flow of each single module, that is,

[0018] q1=△q*n;

[0019] Among them, q1 is the main circulation flow rate of the water cooling system (L / min), △q is the single module flow rate (L / min), and n is the number of power modules.

[0020] Furthermore, the flow rate of the cooling medium in the deionization branch is the deionization branch flow rate, and the deionization branch flow rate is a times the main circulation flow rate, that is,

[0021] q2=a*q1;

[0022] Among them, q2 is the deionization branch flow rate of the water cooling system (L / min), q1 is the main circulation flow rate of the water cooling system (L / min),

[0023] Correspondingly, q=q1+q2,

[0024] Among them, q is the total flow rate of the water cooling system (L / min), q1 is the main circulation flow rate of the water cooling system (L / min), and q2 is the deionization branch flow rate of the water cooling system (L / min).

[0025] Furthermore, the temperature rise △T of the cooling medium flowing through the grid-type SVG is calculated as follows:

[0026] Q = cm△T,

[0027] Then △T=Q / cm;

[0028] Where, Q is the total heat dissipation of the radiator (J), c is the specific heat capacity of the cooling medium (J / (kg*℃)), and m is the mass of the cooling medium (kg);

[0029] Among them, Q=P*t, m=q*t*ρ,

[0030] P is the total heat dissipation power of the radiator (kW), t is the time (h), q is the total flow rate of the water cooling system (L / min), t is the time (h), and ρ is the density of the cooling medium (kg / m³);

[0031] Then △T=Q / cm= P / (c*q*ρ).

[0032] Furthermore, the air cooler includes a plurality of heat dissipation fans.

[0033] Further, the main circulation loop includes a main circulation pump and a main filter, wherein the outlet side of the main circulation pump is connected to the water inlet of the air cooler, the inlet side of the main circulation pump is connected to the water outlet of the valve group of the mesh type SVG, the inlet side of the main filter is connected to the water outlet of the air cooler, and the outlet side of the main filter is connected to the water inlet of the valve group;

[0034] The outlet side of the main circulation pump and the inlet side of the main filter are short-circuited with a straight-through pipeline via an electric three-way valve.

[0035] Furthermore, the inlet side of the deionization branch is connected to the outlet side of the main filter, and the outlet side is connected to the inlet side of the main circulation pump;

[0036] The deionization branch is connected with a water replenishment branch and a voltage stabilization branch.

[0037] Furthermore, the main circulation loop, the deionization branch, the water replenishment branch and the voltage stabilization branch are integrated in an open body.

[0038] After adopting the above technical solution, the present invention has the following beneficial effects:

[0039] (1) Based on the cooling capacity corresponding to the meshing equipment, the present invention increases the flow rate to meet the short-term overcurrent operation requirements, improves the overcurrent capacity of the meshing SVG, and improves the stability of the meshing system operation;

[0040] (2) The present invention can effectively avoid the waste of resources caused by excessive redundancy due to excessive cooling capacity, and greatly reduce the floor space occupied by the water cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0042] Figure 1This is a process diagram of a water cooling method that meets the high-rate overload requirement of a network building system according to a preferred embodiment of the present invention;

[0043] Figure 2 It is a schematic diagram of a water cooling system of a water cooling method that meets the high-rate overload requirement of a network building system according to a preferred embodiment of the present invention;

[0044] Figure 3 The structure of the water cooling system of the water cooling method that meets the high-rate overload requirement of the network construction system in the preferred embodiment of the present invention;

[0045] Figure 4 It is a performance curve diagram of the main circulation pump selected in the water cooling method that meets the high-rate overload requirement of the network construction system in the preferred embodiment of the present invention;

[0046] In the figure: main circulation pump 1, main filter 2, degassing tank 3, electric three-way valve 4, straight-through pipeline 5, heater 6, short-circuit branch 7, deionization tank 8, precision filter 9, buffer tank 10, nitrogen bottle 11, water supply tank 12, water supply pump 13, Y-type filter 14, interface I 15, interface II 16, interface III 17, interface IV 18, valve group 19, air cooler 20. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figure 1-4 As shown, a water cooling method that meets the high-rate overload requirement of a network construction system includes the following steps:

[0050] S1: Determine the multiples of the high rated current operation of the grid-type SVG and the operating time range.

[0051] S2: According to the type of power module in the grid-type SVG, determine its heat dissipation power when operating at a high multiple of the rated current, and select a heat sink that matches it.

[0052] S3: Set the single module flow rate of the water cooling system and perform a simulation test to obtain the junction temperature of the IGBT in the power module.

[0053] Among them, the single module flow is the cooling medium flow flowing through each radiator in the water cooling system.

[0054] S4: Determine whether the junction temperature of the IGBT exceeds 90° C. If so, execute step S5; otherwise, execute step S6.

[0055] According to national standards, the junction temperature of IGBT should not exceed 90°C, so this temperature value is used as the judgment standard.

[0056] S5: Increase the single module flow, repeat the simulation experiment, obtain the junction temperature of the IGBT again, and execute S4.

[0057] S6: Calculate the main circulation flow of the water cooling system based on the single module flow.

[0058] The water cooling system includes a main circulation loop and a deionization branch. The main circulation flow rate is the flow rate of the cooling medium flowing through the main circulation loop.

[0059] The main circulation flow of the water cooling system is the superposition of the flow of each single-mode module, that is,

[0060] q1=△q*n;

[0061] Among them, q1 is the main circulation flow rate of the water cooling system (L / min), △q is the single module flow rate (L / min), and n is the number of power modules.

[0062] The flow rate of the cooling medium in the deionization branch is the deionization branch flow rate, and the deionization branch flow rate is a times the main circulation flow rate, that is,

[0063] q2=a*q1;

[0064] Among them, q2 is the deionization branch flow rate of the water cooling system (L / min), q1 is the main circulation flow rate of the water cooling system (L / min),

[0065] Correspondingly, q=q1+q2,

[0066] Among them, q is the total flow rate of the water cooling system (L / min), q1 is the main circulation flow rate of the water cooling system (L / min), and q2 is the deionization branch flow rate of the water cooling system (L / min).

[0067] Preferably, the value range of a is 0.03~0.05.

[0068] In this embodiment, a=0.05.

[0069] S7: Calculate the total flow of the water cooling system and select the type of main circulation pump 1 according to the total flow.

[0070] Specifically, after calculating the total flow rate (q) of the water cooling system, the head (H) required by the main circulation pump 1 is calculated according to the flow resistance of the water cooling system to form the working point (q, H) of the main circulation pump 1. Then, combined with the flow rate (q)-head (H) performance curve of the water pump, the working point (q, H) of the main circulation pump 1 should be below the above performance curve of the selected water pump and close to the curve, that is, a water pump whose performance curve is above the working point (q, H) and close to the working point is selected as the main circulation pump 1.

[0071] S8: Calculate the temperature rise of the cooling medium flowing through the meshed SVG according to the total flow of the water cooling system, and select the number of air coolers according to the temperature rise and the total flow of the water cooling system.

[0072] The calculation method of the temperature rise △T of the cooling medium flowing through the grid-type SVG is as follows:

[0073] Q = cm△T,

[0074] Then △T=Q / cm;

[0075] Where, Q is the total heat dissipation of the radiator (J), c is the specific heat capacity of the cooling medium (J / (kg*℃)), and m is the mass of the cooling medium (kg);

[0076] Among them, Q=P*t, m=q*t*ρ,

[0077] P is the total heat dissipation power of the radiator (kW), t is the time (h), q is the total flow rate of the water cooling system (L / min), t is the time (h), and ρ is the density of the cooling medium (kg / m³);

[0078] Correspondingly, △T=Q / cm=(P*t) / (c*q*t*ρ)=P / (c*q*ρ).

[0079] From this, the specific value of the temperature rise △T of the cooling medium can be calculated.

[0080] Before substituting various parameters into the above formula for calculating △T, the unit of the total flow rate q of the water cooling system can be converted from L / min to m³ / h.

[0081] The air cooler includes a plurality of heat dissipation fans.

[0082] According to the temperature rise value and the total flow of the water cooling system, the appropriate type of cooling fan can be selected, and the number of cooling fans required can be calculated, and then the number of air coolers can be determined. That is, the total cooling power of all cooling fans (the sum of the cooling power of all cooling fans) cannot be less than the total cooling power of the radiator (the sum of the cooling power of all radiators).

[0083] After determining the number N of air coolers, it is necessary to add at least one more air cooler on this basis, that is, to equip N+1 air coolers, so that it has a certain heat exchange margin, that is, when the ambient temperature is not higher than the set ambient temperature, the N air coolers can be started in sequence, and the heat exchange capacity can meet the requirements; considering the heat island effect, the ground temperature will be slightly higher than the ambient temperature. In this embodiment, the heat island response is considered to be 3°C, that is, the maximum ambient temperature increases by 3°C, and the heat exchange power runs at full load. At this time, N+1 air coolers 20 can be started, so that the heat exchange capacity can meet the requirements.

[0084] In order to realize heat exchange between the mesh-type SVG valve group 19 and the air cooler through the water cooling system, the main circulation loop includes a main circulation pump 1 and a main filter 2, wherein the outlet side of the main circulation pump 1 is connected to the water inlet of the air cooler, the inlet side of the main circulation pump 1 is connected to the water outlet of the mesh-type SVG valve group 19, the inlet side of the main filter 2 is connected to the water outlet of the air cooler, and the outlet side of the main filter 2 is connected to the water inlet of the valve group 19.

[0085] Specifically, a short-circuit branch 7 is provided at the main filter 2 to facilitate maintenance and replacement of the main filter 2 .

[0086] Preferably, the main filter 2 is a mechanical filter with a filtration accuracy of not less than 200 μm to prevent the cooling medium from constantly flushing the pipeline when flowing rapidly, which may cause some rigid particles to fall off and enter the radiator.

[0087] A degassing tank 3 is connected between the inlet side of the main circulation pump 1 and the water outlet of the valve group 19 to remove gas from the cooling medium.

[0088] Two main circulation pumps 1 are provided and arranged in parallel, and one can be reserved as a backup.

[0089] The outlet side of the main circulation pump 1 and the inlet side of the main filter 2 are short-circuited with a straight-through pipeline 5 through an electric three-way valve 4. The electric three-way valve 4 can adjust the ratio of the cooling medium flowing through the air cooler 20 and the cooling medium flowing through the straight-through pipeline 5, and is used for adjusting the cooling medium temperature when the radiator is running at low temperature in winter and at low load.

[0090] A heater 6 is installed on the degassing tank 3. When the temperature of the cooling medium entering the valve group 19 is close to a low value, the electric heater 6 is automatically started to increase the temperature of the cooling medium entering the valve group 19 to prevent the cooling medium temperature from being too low.

[0091] The deionization branch is used to remove ions in the cooling medium to achieve the purpose of maintaining the extremely low conductivity of the cooling medium for a long time. The inlet side of the deionization branch is connected to the outlet side of the main filter 2, and the outlet side is connected to the inlet side of the main circulation pump 1.

[0092] There are two deionization tanks 8 connected in parallel in the deionization branch, one for use and one for backup, and two parallel precision filters 9 are arranged on the outlet side of the deionization tank 8 .

[0093] The ion exchange resin used in the deionization branch is a nuclear-grade non-regenerative resin with a large adsorption capacity, high temperature resistance and high flow rate, and is specifically used for the removal of trace ions. At the same time, a precision filter 9 is provided to filter out resin particles that may be broken in the pipeline, and a pressure gauge is provided near the precision filter 9 to monitor the blockage of the circuit.

[0094] The deionization branch is connected with a water replenishment branch and a voltage stabilization branch.

[0095] The voltage stabilizing branch is arranged at the outlet side of the deionizing branch, and a buffer tank 10 and a nitrogen cylinder 11 connected to the buffer tank 10 are arranged on the voltage stabilizing branch. When the cooling medium is lost due to a small amount of exudation or electrolysis, or the volume changes due to temperature changes, the voltage stabilizing branch will press the cooling medium into the water cooling system to keep the pressure of the pipeline stable and the cooling medium full, buffer its impact on the water cooling system, and ensure the normal operation of the system.

[0096] The water replenishment branch is connected to the inlet side of the deionization branch. The water replenishment branch is provided with a water replenishment tank 12, a water replenishment pump 13, and a Y-type filter 14 connected to the water outlet of the water replenishment tank 12. A visual liquid level gauge is arranged on the outside of the water replenishment tank 12 to display the liquid level in the water replenishment tank 12 and transmit the liquid level signal to the control device. When the liquid level in the buffer tank 10 drops to the water replenishment level, the water replenishment pump 13 starts to automatically replenish water; when the liquid level in the water replenishment tank 12 drops to a low value, an alarm signal is issued to prompt the operator to replenish water to the water replenishment tank 12 to ensure that the liquid level in the water replenishment tank 12 is normal.

[0097] Preferably, the cooling medium is a mixture of pure water and ethylene glycol, and the volume ratio of the mixture is determined according to local environmental conditions to prevent the pipeline system from freezing under low temperature conditions such as shutdown for inspection and maintenance.

[0098] In order to improve the integration of the water cooling system and reduce its size, the main circulation loop, deionization branch, water replenishment branch and voltage stabilization branch are integrated in an open body. This arrangement is structurally reliable and easy to maintain.

[0099] Specifically, Figure 3 As shown, the entire water cooling system is installed on a base plate, and the buffer tank 10 and the water make-up tank 12 are located side by side on the left side of the base plate. Compared with the water make-up tank 12, the buffer tank 10 is larger in size, so the nitrogen bottle 11 connected to the buffer tank 10 is arranged on the side where the water make-up tank 12 is located; two deionization tanks 8 are arranged side by side on the right side of the buffer tank 10 and the water make-up tank 12, two main circulation pumps 1 are arranged side by side on the right side of the two deionization tanks 8, and the degassing tank 3 and the main filter 2 are arranged side by side on the right side of the main circulation pump 1.

[0100] Among them, interface Ⅰ15 connected to the water outlet of the valve group 19 and interface Ⅱ16 connected to the water inlet of the air cooler 20 are arranged side by side, interface Ⅲ17 connected to the water outlet of the air cooler 20 and interface Ⅳ18 connected to the water inlet of the valve group 19 are arranged side by side and are located on the right side of interface Ⅰ15 and interface Ⅱ16. At the same time, the four interfaces are all set upward and are connected to the valve group 19 and the air cooler 20.

[0101] The entire water cooling system is arranged in an integrated manner, with a more compact structure and a smaller footprint.

[0102] Example:

[0103] According to the technical specifications of mesh-type SVG, mesh-type SVG should be able to operate for a long time at a low multiple of the rated current, and the operating time at 6.9 times the rated current (high multiple of the rated current) should be no less than 10 seconds. Therefore, in this embodiment, the high multiple of the rated current refers to 6.9 times the rated current, and the operating time range is no less than 10 seconds.

[0104] In this embodiment, the heat dissipation power of the selected power module is approximately 3.49kW when operating at rated current (steady state), and the heat dissipation power is 20kW when operating at 6.9 times the rated current (transient state). Based on the heat dissipation power, the corresponding radiator is selected, and the 25% heat dissipation power redundancy margin is considered. Then, the total heat dissipation power of the selected radiator is 3.49*189*1.25≈825kW.

[0105] In this embodiment, the cooling medium in the water cooling system is a 22.5% ethylene glycol solution, and the simulation test data are shown in the following table:

[0106]

[0107] In the above table, the current multiple and the concentration of ethylene glycol solution are known. By continuously increasing the single module flow, the IGBT junction temperature when the heat sink is running in a steady state (i.e. rated current) is simulated, that is, the maximum temperature reached by the heat sink when it first runs in a steady state and then runs at 6.9 times the rated current for 10 seconds; the IGBT junction temperature refers to the maximum junction temperature of the grid-type SVG during the process of running at 6.9 times the rated current for 10 seconds.

[0108] It can be seen from the above table that when the single module flow rate is 22.9L / min, the junction temperature of the IGBT is 90.22℃, which is still greater than 90℃, and when the single module flow rate is 24L / min, the junction temperature of the IGBT is 89.74℃, which is less than 90℃, which meets the heat dissipation requirements; and when the single module flow rate continues to increase on the basis of 24L / min, the impact on the IGBT junction temperature is no longer obvious. If the single module flow rate continues to increase, it will cause a waste of resources. Therefore, in this embodiment, the single module flow rate selects 24L / min as the set value of the single module flow rate of the water cooling system.

[0109] In addition, during the simulation test, the smaller the amplitude of increasing the single module flow each time, the higher the accuracy of the set value of the single module flow obtained, which can further reduce the waste of resources accordingly.

[0110] In this embodiment, the grid-type SVG includes a total of 189 power modules, so the main circulation flow of the water cooling system is:

[0111] 24*189=4536L / min;

[0112] The deionization branch flow is 0.05 times the main circulation flow, so the total flow of the water cooling system is:

[0113] 4536+4536*0.05≈4763L / min=285.77m³ / h.

[0114] like Figure 4 As shown, the head required for the main circulation pump 1 is calculated according to the total flow and the flow resistance of the water cooling system, which is 80m. Combined with the performance curve of the water pump (flow-head), the water pump with the working point (285.77, 80) below and close to the performance curve is selected as the main circulation pump 1.

[0115] Since the cooling medium in this embodiment is a 22.5% ethylene glycol solution, its density ρ=1025.89kg / m³, its specific heat capacity c=3785.19J / (kg*℃), the total heat dissipation power P=825kW of the radiator corresponding to all power modules of the entire grid-type SVG, and the total flow rate of the water cooling system q=4736L / min=285.77m³ / h, therefore

[0116] △T=825*3600*10 3 / (3785.19*285.77*1025.89)≈2.7℃.

[0117] At this time, according to the temperature rise of 2.7℃, the total flow of the water cooling system of 285.77m³ / h and the total heat dissipation power of the radiator of 825kW, the required air intake volume (Q') and air intake pressure (i.e., wind pressure P') of the heat dissipation fan can be calculated according to the measured real-time wind speed of 3.3m / s, and the working point (Q', P') of the heat dissipation fan can be determined. Then, through the performance curve of the fan (air intake volume-wind pressure), the fan with the working point (Q', P') close to the midpoint of the performance curve is selected as the heat dissipation fan of this embodiment. By calculating the heat dissipation power of the single heat dissipation fan selected in this embodiment, it is 55kW, and a total of 15 fans are required. Accordingly, 55kW*15=825kW, which is not less than the total heat dissipation power of the radiator (825kW). Due to the limitation of the floor space, a single air cooler includes 5 heat dissipation fans, and 3 air coolers are set. At the same time, because the air cooler is close to the ground, considering the heat island effect, the ground temperature is slightly higher than the ambient temperature, and 1 air cooler is added as redundancy.

[0118] Under the condition of matching the cooling capacity required by the networking equipment, the present invention can meet the operation requirements of short-term overcurrent by increasing the flow rate, thereby improving the overcurrent capacity of the networking SVG, while avoiding the waste of resources caused by excessive redundancy due to excessive cooling capacity, and greatly reducing the occupied area.

[0119] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A water cooling method that meets the high-rate overload requirements of a network construction system, characterized in that: The following steps are involved: S1: Determine the multiple of the high rated current operation of the grid-type SVG and the operating time range; S2: According to the type of power module in the grid-type SVG, determine its heat dissipation power when operating at a high rated current, and select a heat sink that matches it; S3: Set the single module flow rate of the water cooling system and perform a simulation test to obtain the junction temperature of the IGBT in the power module; S4: Determine whether the junction temperature of the IGBT exceeds 90°C, if so, proceed to step S5, otherwise proceed to step S6; S5: Increase the single module flow, re-run the simulation experiment, obtain the junction temperature of the IGBT again, and execute S4; S6: Calculate the main circulation flow of the water cooling system according to the single module flow; S7: Calculate the total flow of the water cooling system and select the type of main circulation pump according to the total flow; S8: Calculate the temperature rise of the cooling medium flowing through the meshed SVG according to the total flow of the water cooling system, and select the number of air coolers according to the temperature rise and the total flow of the water cooling system; The single module flow rate is the cooling medium flow rate flowing through each radiator in the water cooling system.

2. The water cooling method for meeting the high-rate overload requirements of the networking system according to claim 1 is characterized in that: The water cooling system comprises a main circulation loop and a deionization branch, and the main circulation flow rate of the cooling medium is the flow rate of the cooling medium flowing through the main circulation loop.

3. The water cooling method for meeting the high-rate overload requirements of the networking system according to claim 2 is characterized in that: The main circulation flow of the water cooling system is the superposition of the flow of each single module, that is, q1=△q*n; Among them, q1 is the main circulation flow rate of the water cooling system (L / min), △q is the single module flow rate (L / min), and n is the number of power modules.

4. The water cooling method for meeting the high-rate overload requirement of the networking system according to claim 2 is characterized in that: The flow rate of the cooling medium in the deionization branch is the deionization branch flow rate, and the deionization branch flow rate is a times the main circulation flow rate, that is, q2=a*q1; Among them, q2 is the deionization branch flow rate of the water cooling system (L / min), q1 is the main circulation flow rate of the water cooling system (L / min), Correspondingly, q=q1+q2, Among them, q is the total flow rate of the water cooling system (L / min), q1 is the main circulation flow rate of the water cooling system (L / min), and q2 is the deionization branch flow rate of the water cooling system (L / min).

5. The water cooling method for meeting the high-rate overload requirement of the networking system according to claim 1 is characterized in that: The calculation method of the temperature rise △T of the cooling medium flowing through the grid-type SVG is as follows: Q = cm△T, Then △T=Q / cm; Where, Q is the total heat dissipation of the radiator (J), c is the specific heat capacity of the cooling medium (J / (kg*℃)), and m is the mass of the cooling medium (kg); Among them, Q=P*t, m=q*t*ρ, P is the total heat dissipation power of the radiator (kW), t is the time (h), q is the total flow rate of the water cooling system (L / min), t is the time (h), and ρ is the density of the cooling medium (kg / m³); Then △T=Q / cm= P / (c*q*ρ).

6. The water cooling method for meeting the high-rate overload requirement of the networking system according to claim 1 is characterized in that: The air cooler includes a plurality of heat dissipation fans.

7. The water cooling method for meeting the high-rate overload requirement of the network construction system according to claim 2 is characterized in that: The main circulation loop includes a main circulation pump and a main filter, wherein the outlet side of the main circulation pump is connected to the water inlet of the air cooler, the inlet side of the main circulation pump is connected to the water outlet of the valve group of the mesh type SVG, the inlet side of the main filter is connected to the water outlet of the air cooler, and the outlet side of the main filter is connected to the water inlet of the valve group; The outlet side of the main circulation pump and the inlet side of the main filter are short-circuited with a straight-through pipeline via an electric three-way valve.

8. The water cooling method for meeting the high-rate overload requirement of the network construction system according to claim 7 is characterized in that: The inlet side of the deionization branch is connected to the outlet side of the main filter, and the outlet side is connected to the inlet side of the main circulation pump; The deionization branch is connected with a water replenishment branch and a voltage stabilization branch.

9. The water cooling method for meeting the high-rate overload requirement of the network construction system according to claim 8, characterized in that: The main circulation loop, the deionization branch, the water replenishment branch and the voltage stabilization branch are integrated in an open body.

Images