CN118119138A - Indirect evaporative cooling system of machine room cabinet and control method thereof - Google Patents
Indirect evaporative cooling system of machine room cabinet and control method thereof Download PDFInfo
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- CN118119138A CN118119138A CN202211514939.0A CN202211514939A CN118119138A CN 118119138 A CN118119138 A CN 118119138A CN 202211514939 A CN202211514939 A CN 202211514939A CN 118119138 A CN118119138 A CN 118119138A
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- 238000001704 evaporation Methods 0.000 claims abstract description 44
- 239000000945 filler Substances 0.000 claims abstract description 20
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- 238000009833 condensation Methods 0.000 claims abstract description 11
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Abstract
The invention relates to an indirect evaporative cooling system of a machine room cabinet, which comprises a plate filter, a precooling coil, a three-way valve, a circulating water pump, a spraying device, a filler, a water receiving disc, a water tank, a first fan, a heat pipe exchanger, a second fan, a temperature sensor and a controller, wherein the evaporation section and the second fan are positioned in the machine room, the machine room is divided into a cold channel and a hot channel by the cabinet, one end of the evaporation section is communicated with the cold channel, the other end of the evaporation section is communicated with the hot channel, cold air in a closed space outside the machine room is sucked by the first fan to enter one end of the condensation section, the cold air is discharged from the other end of the condensation section to an open space outside the machine room, and hot air in the hot channel is sucked by the second fan to enter one end of the evaporation section and is discharged from the other end of the evaporation section to the cold channel. According to different seasons, different operation modes can be adopted, external natural air cooling is fully utilized for heat dissipation and cooling, and energy consumption can be reduced.
Description
Technical Field
The invention relates to the field of evaporative cooling and heat exchange products and control, in particular to an indirect evaporative cooling system of a machine room cabinet and a control method thereof.
Background
Along with the increasing of data, the density of the data center is also increased, the temperature of the data center is increased gradually, the cooling and energy saving of the data center become a main solution direction, the machine room of the current data center adopts the form of an inter-column air conditioner and a room air conditioner to cool the machine room, however, the inter-column air conditioner and the room air conditioner are mechanically cooled by compressors, so that the mode is very energy-consuming, and the mode cannot be switched according to the temperature change of the external environment to utilize natural cold sources, natural air cooling is not fully utilized, and energy is not saved.
Meanwhile, in some indirect evaporative cooling systems, natural wind is utilized, but a plate heat exchanger is adopted to exchange heat and cool hot wind in a machine room, however, the plate heat exchanger has limitation when being used at high wind speed, the service life of a diaphragm can be weakened due to the fact that the wind speed is too high, and noise and wind resistance can also become large; secondly, the heat exchange core is easy to be blocked and needs to be maintained regularly; meanwhile, the problem of large volume exists, and more system space is occupied.
Disclosure of Invention
In order to overcome the defects of the existing products and technologies, the invention provides an indirect evaporative cooling system of a machine room cabinet, which can adopt different operation modes according to different seasons, fully utilizes external natural air cooling to dissipate heat and cool, and can reduce energy consumption.
The technical scheme of the embodiment of the invention is as follows:
An indirect evaporative cooling system of a machine room cabinet, the system comprises a plate filter, a precooling coil, a three-way valve, a circulating water pump, a spraying device, a filler, a water receiving disc, a water tank, a first fan, a heat pipe heat exchanger, a second fan, a temperature sensor and a controller, wherein the plate filter, the precooling coil, the three-way valve, the circulating water pump, the spraying device, the filler, the water receiving disc, the water tank and the first fan are arranged in a sealed space outside the machine room, the plate filter is positioned at an air inlet of the sealed space outside the machine room, the precooling coil is arranged right behind the plate filter, the filler is arranged behind the precooling coil, the spraying device is arranged right above the filler, the water receiving disc is arranged below the water receiving disc and is communicated with the water receiving disc, a water inlet end of the circulating water pump is communicated with the water tank through a pipeline, a water outlet end of the circulating water pump is communicated with a first port of the three-way valve through a pipeline, a second port of the three-way valve is communicated with the precooling coil through a temperature sensor, the temperature sensor is arranged at a second port of the precooling coil is arranged at the precooling coil, the temperature sensor is connected with the three-way fan through the three-way valve, and the temperature sensor is electrically connected with the temperature sensor;
The heat pipe heat exchanger is provided with a condensing section, an adiabatic section and an evaporating section, one end of the condensing section is communicated with an airtight space outside the machine room, the other end of the condensing section is communicated with an open space outside the machine room, the adiabatic section is positioned at a joint of the machine room and an outer hole of the machine room, the evaporating section and the second fan are positioned in the machine room, the machine room is separated into a cold channel and a hot channel by the machine cabinet, one end of the evaporating section is communicated with the cold channel, the other end of the evaporating section is communicated with the hot channel, cold air in the airtight space outside the machine room is sucked by the first fan to enter one end of the condensing section, the cold air is discharged from the other end of the condensing section to the open space outside the machine room, and hot air in the hot channel is sucked by the second fan to enter one end of the evaporating section, and the cold air is discharged from the other end of the evaporating section to the cold channel.
Preferably, the heat pipe exchanger comprises a shell and a plurality of heat pipes, wherein the shell is provided with a condensation cavity, an insulation cavity and an evaporation cavity which are connected into a whole, one ends of the heat pipes with uniform intervals are positioned in the condensation cavity, the other ends of the heat pipes are positioned in the evaporation cavity, the heat pipes penetrate through the whole insulation cavity, and the heat pipe pipeline is internally stored with temperature difference phase change vaporization liquid.
In addition, the invention also provides a control method of the indirect evaporative cooling system of the machine room cabinet, which comprises the following steps:
Step 100: the temperature sensor measures the ambient temperature in real time and synchronously transmits the temperature value to the controller;
Step 200: the controller controls the opening of three ports of the three-way valve according to the temperature value, and the controller adjusts the conveying flow of the circulating water pump and the output air quantity of the fan according to the temperature value.
Preferably, the step S200 includes: when the temperature value is greater than 25 ℃, the controller sends a first mode signal to the three-way valve, the first port and the second port of the three-way valve are communicated, when the temperature value is 30 ℃, the circulating water pump, the first fan and the second fan operate according to a first set of set fixed power, and when the temperature value is greater than 30 ℃ or less than 30 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fan according to the temperature value so as to control the conveying flow and the output air quantity;
When the temperature value is less than or equal to 25 ℃ and greater than 16 ℃, the controller sends a second mode signal to the three-way valve, the first port and the third port of the three-way valve are communicated, when the temperature value is 20 ℃, the circulating water pump, the first fan and the second fan operate according to a second set of fixed power, and when the temperature value is greater than 20 ℃ or less than 20 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fan according to the temperature value so as to control the conveying flow and the output air quantity;
When the temperature value is less than or equal to 16 ℃, the controller sends a shutdown signal to the circulating water pump, the circulating water pump stops running, when the temperature value is 10 ℃, the first fan and the second fan run according to the fixed power set by the third group, and when the temperature value is more than 10 ℃ or less than 10 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fans according to the temperature value so as to control the conveying flow and the output air quantity.
Compared with the prior art, the invention has the beneficial effects that:
The plate type filter is arranged to filter the external natural wind, the precooling coil is arranged to precool the natural wind, the precooled natural wind exchanges heat with circulating water in the filler in an evaporating way, the heat exchange efficiency is higher, the three operation modes of the indirect evaporative cooling system can be realized by arranging the three-way valve on the output pipeline of the circulating water pump and controlling the on-off of the three-way valve according to the seasonal temperature, the plate type filter is switched to the natural wind precooling mode in summer, the plate type filter is switched to the non-precooling mode in spring and autumn, and the plate type filter is switched to the direct natural wind mode in winter.
Drawings
FIG. 1 is a schematic diagram of an indirect evaporative cooling system for a machine room cabinet according to the present invention;
FIG. 2 is a schematic diagram of a heat pipe exchanger according to the present invention;
FIG. 3 is a flow chart of a method of controlling an indirect evaporative cooling system in accordance with the present invention;
100. the outside of the machine room is sealed; 11. a panel filter; 12. precooling coil; 13. a spraying device; 14. a filler; 15. a water receiving tray; 16. a water tank; 17. a circulating water pump; 18. a three-way valve; 19. a first fan; 20. a second fan; 200. an open space outside the machine room; 22. a heat pipe heat exchanger; 221. a condensing chamber; 222. a thermally insulating cavity; 223. an evaporation cavity; 224. a heat pipe; 225. a housing; 226. a condensing section; 227. an insulation section; 228. an evaporation section; 300. a machine room; 301. a cabinet; 302. a thermal channel; 303. a cold aisle; s100, a step 100; s200, step 200.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1 and 2, fig. 1 is a schematic diagram of an indirect evaporative cooling system of a machine room cabinet according to the present invention; FIG. 2 is a schematic diagram of a heat pipe exchanger according to the present invention; an indirect evaporative cooling system of a machine room cabinet comprises a plate filter, a precooling coil, a three-way valve, a circulating water pump, a spraying device, a filler, a water receiving disc, a water tank, a first fan, a heat pipe heat exchanger, a second fan, a temperature sensor and a controller, wherein the plate filter, the precooling coil, the three-way valve, the circulating water pump, the spraying device, the filler, the water receiving disc, the water tank and the first fan are arranged in an airtight space outside the machine room, the plate filter is positioned at an air inlet of the airtight space outside the machine room, the precooling coil is arranged right behind the plate filter, the filler is arranged behind the precooling coil, the spraying device is arranged right above the filler, the water receiving disc is arranged below the water receiving disc and is communicated with the water receiving disc, a water inlet end of the circulating water pump is communicated with the water tank through a pipeline, a water outlet end of the circulating water pump is communicated with a first port of the three-way valve through a pipeline, a second port of the three-way valve is communicated with the precooling coil through a pipeline, the temperature sensor is arranged behind the precooling coil, the temperature sensor is arranged at the three-way valve, and the temperature sensor is electrically connected with the three-way fan through the temperature sensor, and the temperature sensor;
The heat pipe heat exchanger is provided with a condensing section, an adiabatic section and an evaporating section, one end of the condensing section is communicated with an airtight space outside the machine room, the other end of the condensing section is communicated with an open space outside the machine room, the adiabatic section is positioned at a joint of the machine room and an outer hole of the machine room, the evaporating section and the second fan are positioned in the machine room, the machine room is separated into a cold channel and a hot channel by the machine cabinet, one end of the evaporating section is communicated with the cold channel, the other end of the evaporating section is communicated with the hot channel, cold air in the airtight space outside the machine room is sucked by the first fan to enter one end of the condensing section, the cold air is discharged from the other end of the condensing section to the open space outside the machine room, and hot air in the hot channel is sucked by the second fan to enter one end of the evaporating section, and the cold air is discharged from the other end of the evaporating section to the cold channel.
In the data center computer lab, the server is deposited on the rack, and the server is as high-power equipment, needs in time dispel the heat, needs to dispel the heat to the computer lab opportunity, and in the computer lab, the rack is as the radiating object main part, gets into cold wind and the hot-blast heat transfer cooling in the rack from one end in general, and hot-blast is discharged from the opposite side, so, can utilize the physical property of rack to separate into cold passageway and hot passageway with the computer lab, cold wind gets into inside the rack through cold passageway, and hot-blast is discharged through hot passageway from inside the rack. In order to ensure the working environment of a server, a sealing environment is usually adopted in a machine room, so that external impurities are prevented from entering, and only a fresh air channel is reserved. The heat pipe heat exchanger is characterized in that the part outside the heat pipe heat exchanger is a condensing section, the part of the machine room is an evaporating section, the joint of the machine room and the outside is an adiabatic section, the evaporating section provides cold energy, hot air of the machine room enters the evaporating section to exchange heat with the cold energy for cooling, the condensing section corresponds to the evaporating section to release heat, and the condensing section exchanges heat with the cold energy provided by an external cooling system for cooling, releases the heat, so that the heat exchange cooling of the machine room is realized. The external cooling system is an indirect evaporative cooling system in the invention, natural wind is made into cold wind in a sealed space outside a machine room, and the cold wind is input into a condensing section of the heat pipe exchanger. The principle of operation of the indirect evaporative cooling system is as follows: in summer, natural wind has higher temperature and needs precooling, natural wind enters an external sealed space of a machine room through a plate filter to exchange heat and precool with a precooling coil, enters a filler to carry out evaporation heat exchange with circulating water after cooling, enters a condensation section of a heat pipe heat exchanger through a first fan after heat exchange and cooling, cools and releases pressure on the condensation section, and is discharged to an external open space of the machine room after heat exchange and temperature rise; the water in the water storage tank is pumped by a circulating water pump and is conveyed to a pre-cooling coil pipe through a three-way valve, and after natural heat exchange and temperature rise, the water is conveyed to a spraying device, the spraying device spreads the heated circulating water on a filler to be evaporated and cooled with hot air, and the circulating water is collected in a water receiving disc and flows into the water storage tank; and in spring and autumn, the controller controls the three-way valve, the circulating water pump pumps circulating water to the spraying device directly, and in winter, the circulating water pump is controlled to be closed and naturally and directly pumped into the condensing section through the first fan.
In the invention, preferably, the heat pipe heat exchanger comprises a shell and a plurality of heat pipes, wherein the shell is provided with a condensing cavity, a heat insulation cavity and an evaporating cavity which are connected into a whole, one ends of the heat pipes with uniform intervals are positioned in the condensing cavity, the other ends of the heat pipes are positioned in the evaporating cavity, the heat pipes penetrate through the whole heat insulation cavity, and the heat pipe pipeline is internally stored with temperature difference phase change vaporization liquid.
The heat pipe pipeline penetrates through the evaporation section, the heat insulation section and the condensation section, the heat pipe is a low-temperature section in the evaporation cavity, the heat pipe is a high-temperature section in the condensation cavity, the heat pipe stores a temperature difference phase change material through the inside of the pipeline, the phase change material is changed into a high-temperature gas state in the condensation high-temperature section, the high-temperature gas state is condensed into low-temperature liquid after encountering external cold air, the liquid flows back to the evaporation section through the heat insulation section along the porous material in the heat pipe by the action of capillary force, the low-temperature liquid exchanges heat with the hot air in a machine room entering the evaporation cavity in the evaporation section, and the heat absorption and the evaporation are gases. The temperature difference phase change vaporization liquid is prepared by mixing CaCl2.6H O, srCl 2.6H2O and hydroxymethyl cellulose sodium according to weight percentage.
Compared with the prior art, the invention has the beneficial effects that:
The plate type filter is arranged to filter the external natural wind, the precooling coil is arranged to precool the natural wind, the precooled natural wind exchanges heat with circulating water in the filler in an evaporating way, the heat exchange efficiency is higher, the three operation modes of the indirect evaporative cooling system can be realized by arranging the three-way valve on the output pipeline of the circulating water pump and controlling the on-off of the three-way valve according to the seasonal temperature, the plate type filter is switched to the natural wind precooling mode in summer, the plate type filter is switched to the non-precooling mode in spring and autumn, and the plate type filter is switched to the direct natural wind mode in winter.
In addition, the invention also provides a control method of the indirect evaporative cooling system of the machine room cabinet, which is used for operating and working by the control method, as shown in fig. 3, and fig. 3 is a flow chart of the control method of the indirect evaporative cooling system in the invention; the method comprises the following steps:
Step 100: the temperature sensor measures the ambient temperature in real time and synchronously transmits the temperature value to the controller;
The controller controls the water pump, the three-way valve, the first fan and the second fan of the indirect evaporative cooling system to switch among summer mode, spring and autumn mode and winter mode according to the ambient temperature, and the circulating water flow and the fan air quantity in each mode are regulated, and the temperature sensor provides real-time original data for control.
Step 200: the controller controls the opening of three ports of the three-way valve according to the temperature value, and the controller adjusts the conveying flow of the circulating water pump and the output air quantity of the fan according to the temperature value.
The opening of three ports of the three-way valve is controlled, the circulating water circulation route is determined, and the opening of the circulating water pump and the rotating speed of the fan are regulated according to the temperature value change, so that the flow and the air quantity are controlled.
Specifically, when the temperature value is greater than 25 ℃, the controller sends a first mode signal to the three-way valve, the first port and the second port of the three-way valve are communicated, when the temperature value is 30 ℃, the circulating water pump, the first fan and the second fan operate according to a first set of set fixed power, and when the temperature value is greater than 30 ℃ or less than 30 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fan according to the temperature value so as to control the conveying flow and the output air quantity;
When the temperature value is less than or equal to 25 ℃ and greater than 16 ℃, the controller sends a second mode signal to the three-way valve, the first port and the third port of the three-way valve are communicated, when the temperature value is 20 ℃, the circulating water pump, the first fan and the second fan operate according to a second set of fixed power, and when the temperature value is greater than 20 ℃ or less than 20 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fan according to the temperature value so as to control the conveying flow and the output air quantity;
When the temperature value is less than or equal to 16 ℃, the controller sends a shutdown signal to the circulating water pump, the circulating water pump stops running, when the temperature value is 10 ℃, the first fan and the second fan run according to the fixed power set by the third group, and when the temperature value is more than 10 ℃ or less than 10 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fans according to the temperature value so as to control the conveying flow and the output air quantity.
The controller sets a group of fixed operation power for each operation mode, the operation power of the circulating water pump is included, the power of the first fan and the power of the second fan are fixed, circulating water flow and air quantity of the fan are fixed, when the controller receives that the current temperature is higher than 25 ℃, the current indirect cooling system needs to enter a summer mode, a first mode signal is controlled to be sent to the three-way valve, the first port and the second port of the three-way valve are conducted, circulating water circulates through the precooling coil, and when the temperature is higher than or lower than 30 ℃ corresponding to the fixed power, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fan according to the temperature value so as to control conveying flow and output air quantity. The larger the temperature is, the larger the opening of the circulating water pump is, and the faster the rotating speed of the fan is; when the current temperature is less than or equal to 25 ℃ and greater than 16 ℃, the current indirect cooling system needs to enter a spring and autumn mode, the controller sends a second mode signal to the three-way valve, the first port and the third port of the three-way valve are communicated, circulating water is directly sent to the spraying device for circulation without a precooling coil pipe, and when the temperature is greater than or less than 20 ℃ corresponding to fixed power, the controller carries out PID (proportion integration differentiation) according to the temperature value to adjust the opening of the circulating water pump and the rotating speed of the fan so as to control the conveying flow and the output air quantity. The larger the temperature is, the larger the opening of the circulating water pump is, and the faster the rotating speed of the fan is; when the controller receives that the current temperature is less than 16 ℃, the current indirect cooling system needs to enter a winter mode, at the moment, the controller sends a shutdown signal to the circulating water pump, the circulating water pump stops running, and when the temperature is greater than or less than 10 ℃ corresponding to fixed power, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fan according to the temperature value so as to control the conveying flow and the output air quantity. I.e. the larger the temperature, the larger the opening of the circulating water pump and the faster the rotating speed of the fan.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (4)
1. An indirect evaporative cooling system of a machine room cabinet is characterized in that,
The system comprises a plate filter, a precooling coil, a three-way valve, a circulating water pump, a spray device, a filler, a water receiving disc, a water tank, a first fan, a heat pipe heat exchanger, a second fan, a temperature sensor and a controller, wherein the plate filter, the precooling coil, the three-way valve, the circulating water pump, the spray device, the filler, the water receiving disc, the water tank and the first fan are arranged in a sealed space outside a machine room, the plate filter is positioned at an air inlet of the sealed space outside the machine room, the precooling coil is arranged right behind the plate filter, the filler is arranged behind the precooling coil, the spray device is arranged right above the filler, the water receiving disc is arranged below the filler, the water tank is arranged below the water receiving disc and is communicated with the water receiving disc, the water inlet end of the circulating water pump is communicated with the water tank through a pipeline, the water outlet end of the circulating water pump is communicated with a first port of the three-way valve through a pipeline, the second port of the three-way valve is communicated with one end of the precooling coil through a pipeline, the filler is arranged at the other end of the precooling coil is connected with the temperature sensor through the third fan, the temperature sensor is connected with the three-way valve through the spray device, the temperature sensor and the three-way valve, and the temperature sensor is electrically connected with the temperature sensor;
The heat pipe heat exchanger is provided with a condensing section, an adiabatic section and an evaporating section, one end of the condensing section is communicated with an airtight space outside the machine room, the other end of the condensing section is communicated with an open space outside the machine room, the adiabatic section is positioned at a joint of the machine room and an outer hole of the machine room, the evaporating section and the second fan are positioned in the machine room, the machine room is separated into a cold channel and a hot channel by the machine cabinet, one end of the evaporating section is communicated with the cold channel, the other end of the evaporating section is communicated with the hot channel, cold air in the airtight space outside the machine room is sucked by the first fan to enter one end of the condensing section, the cold air is discharged from the other end of the condensing section to the open space outside the machine room, and hot air in the hot channel is sucked by the second fan to enter one end of the evaporating section, and the cold air is discharged from the other end of the evaporating section to the cold channel.
2. An indirect evaporative cooling system for a machine room enclosure as claimed in claim 1, wherein,
The heat pipe heat exchanger comprises a shell and a plurality of heat pipes, wherein the shell is provided with a condensation cavity, an adiabatic cavity and an evaporation cavity which are connected into a whole, one ends of the heat pipes with uniform intervals are positioned in the condensation cavity, the other ends of the heat pipes are positioned in the evaporation cavity, the heat pipes penetrate through the whole adiabatic cavity, and the heat pipe pipeline is internally stored with temperature difference phase change vaporization liquid.
3. A method of controlling an indirect evaporative cooling system for a machine room enclosure as defined in claim 1, comprising:
Step 100: the temperature sensor measures the ambient temperature in real time and synchronously transmits the temperature value to the controller;
Step 200: the controller controls the opening of three ports of the three-way valve according to the temperature value, and the controller adjusts the conveying flow of the circulating water pump and the output air quantity of the fan according to the temperature value.
4. A control method according to claim 3, wherein said step S200 includes:
When the temperature value is greater than 25 ℃, the controller sends a first mode signal to the three-way valve, the first port and the second port of the three-way valve are communicated, when the temperature value is 30 ℃, the circulating water pump, the first fan and the second fan operate according to a first set of set fixed power, and when the temperature value is greater than 30 ℃ or less than 30 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fan according to the temperature value so as to control the conveying flow and the output air quantity;
When the temperature value is less than or equal to 25 ℃ and greater than 16 ℃, the controller sends a second mode signal to the three-way valve, the first port and the third port of the three-way valve are communicated, when the temperature value is 20 ℃, the circulating water pump, the first fan and the second fan operate according to a second set of fixed power, and when the temperature value is greater than 20 ℃ or less than 20 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fan according to the temperature value so as to control the conveying flow and the output air quantity;
When the temperature value is less than or equal to 16 ℃, the controller sends a shutdown signal to the circulating water pump, the circulating water pump stops running, when the temperature value is 10 ℃, the first fan and the second fan run according to the fixed power set by the third group, and when the temperature value is more than 10 ℃ or less than 10 ℃, the controller carries out PID (proportion integration differentiation) adjustment on the opening of the circulating water pump and the rotating speed of the fans according to the temperature value so as to control the conveying flow and the output air quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211514939.0A CN118119138A (en) | 2022-11-29 | 2022-11-29 | Indirect evaporative cooling system of machine room cabinet and control method thereof |
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| CN202211514939.0A CN118119138A (en) | 2022-11-29 | 2022-11-29 | Indirect evaporative cooling system of machine room cabinet and control method thereof |
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| CN202211514939.0A Pending CN118119138A (en) | 2022-11-29 | 2022-11-29 | Indirect evaporative cooling system of machine room cabinet and control method thereof |
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