CN110398047A - A kind of evaporative cooling system and control method - Google Patents
A kind of evaporative cooling system and control method Download PDFInfo
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- CN110398047A CN110398047A CN201910626224.6A CN201910626224A CN110398047A CN 110398047 A CN110398047 A CN 110398047A CN 201910626224 A CN201910626224 A CN 201910626224A CN 110398047 A CN110398047 A CN 110398047A
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- 238000001816 cooling Methods 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001704 evaporation Methods 0.000 claims abstract description 77
- 230000008020 evaporation Effects 0.000 claims abstract description 73
- 238000001514 detection method Methods 0.000 claims abstract description 66
- 239000000498 cooling water Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 112
- 239000007921 spray Substances 0.000 claims description 21
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 description 8
- 238000004378 air conditioning Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 238000010025 steaming Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to a kind of evaporative cooling system and control methods, including indirect refrigerating module, evaporation module, heat exchanger, indoor air supply module, outdoor air supply module, first detection module and control module, indoor air supply module is used for the conveying of room air, and outdoor air supply module is used for the conveying of outdoor air；Indirect refrigerating module is for outdoor air and its cooling water mediate contact to carry out heat exchange, evaporation module is directly contacted for outdoor air with its cooling water to carry out heat exchange, and heat exchanger is delivered to interior after carrying out heat exchange with the cooling water mediate contact of outdoor air, evaporation module respectively for room air；First detection module is communicated to connect with indirect refrigerating module, evaporation module and first detection module respectively for detecting outdoor temperature, control module, and control module controls indirect refrigerating module according to the temperature value that first detection module detects and evaporates the opening and closing of module.Different cooling mode of operation is selected, natural cooling source is made full use of, it is energy saving.
Description
Technical field
The present invention relates to air-conditioning technical fields, more particularly, to a kind of evaporative cooling system and control method.
Background technique
The energy-saving and emission-reduction and environmentally protective demand to grow in intensity in world wide, to as the maximum data of IT industry energy consumption
More stringent requirements are proposed for center construction and operation.The reduction of data center's PUE value has become the head of owner and design and construction person
Want demand.
For the mode of traditional compressor refrigeration, since the power consumption of compressor is generally bigger, so integrated machine
The energy consumption of room air-conditioning can be very high, and room management cost is caused to be sharply increased.And by natural cooling source come computer room heat dissipation, then machine
Room energy consumption can reduce, and whole PUE and CLF are relatively low.And the cold phase-state change by using water of indirect evaporation, it can be better
The heat of computer room is taken away, and environment is not influenced, belongs to environmentally friendly working medium, the CLF of general computer room can accomplish 0.1 or so.
Therefore, energy-efficient data center is a big inexorable trend of Future Data center industry development, continues and has
The operation cost that effect ground reduces data center has become the task of top priority.So being set for evaporation cooling technique in air conditioner in machine room
Application in standby, and different operational modes is provided, improves transpiration-cooled efficiency to the entire energy consumption of IT room system
It can seem extremely important.
Summary of the invention
The first object of the present invention is to provide a kind of evaporative cooling system, according to the size of outdoor temperature, provides a variety of cold
But operational mode meets different use environments.
Foregoing invention purpose of the invention has the technical scheme that a kind of evaporative cooling system, packet
Include indirect refrigerating module, evaporation module, heat exchanger, indoor air supply module, outdoor air supply module, first detection module and control mould
Block, the interior air supply module make it by the heat exchanger for the conveying of room air, and the outdoor air supply module is used for
The conveying of outdoor air makes it successively by the indirect refrigerating module, the evaporation module and the heat exchanger；It is described indirect
Refrigerating module carries out heat exchange for outdoor air and its cooling water mediate contact, the evaporation module for outdoor air and
Its cooling water is directly contacted to carry out heat exchange, the heat exchanger for room air respectively with outdoor air, the evaporation mold
The cooling water mediate contact of block is delivered to interior after carrying out heat exchange；The first detection module is for detecting outdoor temperature, institute
Control module is stated to communicate to connect with the indirect refrigerating module, the evaporation module and the first detection module respectively, it is described
Control module is according to receiving the temperature value of first detection module detection to control the indirect refrigerating module and the steaming
Send out the opening and closing of module.
By using above-mentioned technical proposal, indirect refrigerating module and evaporation module are indirectly cooling and straight to outdoor air progress
Evaporation cooling is connect, outdoor air can be allowed to obtain more cooling capacity, to can preferably reduce room temperature in heat exchanger；Together
When evaporation module cooling water can also further decrease room temperature with room air mediate contact.According to first detection module
The outdoor temperature size of detection, control module selects different cooling mode of operation, including closes indirect refrigerating module and evaporation
Module starts indirect refrigerating module, starts indirect refrigerating module and evaporation module；Different use environments can be met in this way, saved
The about energy can make full use of natural cooling source, accomplish the purpose of water-saving economize on electricity.
The present invention is further arranged to: when the indirect refrigerating module and the evaporation module are turned off, the control
Module and the outdoor air supply module communicate to connect, the temperature that the control module is detected according to the first detection module is received
Angle value is to control the air quantity of the outdoor air supply module.
By using above-mentioned technical proposal, when the flow of room air keeps certain range constant, according to outdoor temp
It spends to adjust the flow of outdoor air, so that the heat exchange effect of outdoor air and room air is more preferable.
The present invention is further arranged to: further including that detection outdoor air enters institute when indirect refrigerating module starting
Second detection module of dry-bulb temperature when stating heat exchanger, the control module respectively with the outdoor air supply module and described second
Detection module communication connection, the control module control described according to the temperature value that second detection module detects is received
The air quantity of outdoor air supply module, the control module are examined according to the first detection module and second detection module is received
The temperature difference of survey is to control the cooling water flow of the indirect refrigerating module.
By using above-mentioned technical proposal, adjusted according to the temperature difference of temperature at heat exchanger entrance and outdoor temperature indirectly cold
But the cooling water flow of module, to realize the preliminary purpose for reducing room air.
The present invention is further arranged to: further including described in detection outdoor air enters when the evaporation module starts
The third detection module of wet-bulb temperature when heat exchanger, the control module and the third detection module communicate to connect, the control
Molding root tuber evidence receives the temperature difference of second detection module and third detection module detection to control the evaporation mold
The cooling water flow of block.
By using above-mentioned technical proposal, steaming is adjusted according to the temperature difference of dry-bulb temperature at heat exchanger entrance and wet-bulb temperature
The cooling water flow of module is sent out, to realize the purpose for reducing room air again.
The present invention is further arranged to: the indirect refrigerating module includes water tank and heat exchange coil, the water tank with it is described
It is communicated with the first water inlet pipe and return pipe between heat exchange coil, is provided on first water inlet pipe for by the water of the water tank
It is delivered to the first water pump of the heat exchange coil, first water pump and the control module communicate to connect.
By using above-mentioned technical proposal, the water in water tank is pumped into heat exchange coil by the first water pump, outdoor air with
The heat exchange coil of heat exchange coil contacts, to exchange heat to outdoor air, reduces the temperature of outdoor air；By heat exchange coil
Cooling water be back in water tank by return pipe, thus to water resource recycle, reduce water consumption/machine of WUE(air-conditioning
The energy consumption in room) value；Control module reaches the control of water flow in exchange hot coil by the revolving speed of the first water pump of control.
The present invention is further arranged to: the evaporation module includes water tank below the heat exchanger and multiple is located at
Spray head above the heat exchanger is communicated with the second water inlet pipe, second water inlet between the water tank and the spray head
The second water pump for the water of the water tank to be delivered to the spray head, second water pump and the control are provided on pipe
Module communication connection.
By using above-mentioned technical proposal, the cooling water in water tank is pumped at spray head by the second water pump, and through spraying
Head is sprayed to heat exchanger, and part cooling water is directly contacted with outdoor air, and directly evaporation occurs by room with outdoor air
Outer air is taken away, and the temperature for reducing outdoor air is reached；Part cooling water is flow back into water tank along the pipeline of heat exchanger, and with
Indirect evaporation occurs for room air to cool down to room air, to recycle to water resource, reduces the consumption of WUE(air-conditioning
Water/computer room energy consumption) value；Control module is reached by the revolving speed of the second water pump of control to spray water flow in spray head
Control.
The present invention is further arranged to: the outdoor air supply module includes outdoor fan, the outdoor fan and the control
The communication connection of molding block.
By using above-mentioned technical proposal, outdoor fan conveys the outdoor air entered in heat exchanger, controls mould
Block reaches the control to outdoor air force by the revolving speed of control outdoor fan.
The second object of the present invention is to provide a kind of evaporative cooling system control method and is mentioned according to the size of outdoor temperature
For a variety of cooling mode of operation, meet different use environments.
Foregoing invention purpose of the invention has the technical scheme that a kind of evaporative cooling system control
Method, comprising the following steps:
S1, the first temperature threshold T of setting1, second temperature threshold value T2With third temperature threshold T3, and T1< T2< T3；
S2, the dry-bulb temperature T for detecting outdoor air；
S3, the operating mode that cooling system is controlled according to dry-bulb temperature T:
As T < T1When, close indirect refrigerating module and evaporation module；
Work as T1< T < T2When, start indirect refrigerating module, closes evaporation module；
Work as T2< T < T3When, start indirect refrigerating module and evaporation module；
As T > T3When, start indirect refrigerating module and evaporation module, and refrigeration is compensated by other cold sources.
It selects different operating modes according to the size of outdoor temperature by using above-mentioned technical proposal: working as outdoor temperature
When lower, indirect refrigerating module and evaporation module are closed, is only carried out in heat exchanger by outdoor Cryogenic air and room air
Heat exchange is with to indoor offer cooling capacity, this operating condition is known as dry cooling condition；When outdoor temperature is in medium temperature, can star indirectly cold
But module does indirect cooling and indirect evaporation to outdoor air by heat exchange coil, reduces the temperature of outdoor air, this process
In, the water circulation use of heat exchange coil can save water resource；When outdoor temperature is higher, indirect cooling can be started simultaneously
Module and evaporation module, do indirect cooling and indirect evaporation to outdoor air by heat exchange coil, reduce the temperature of outdoor air,
Then directly being evaporated by spray head to outdoor air reduces outside air temperature, and outdoor air have passed through twice in whole process
Heat exchange, heat exchange amount is larger, and the temperature of outdoor air reduces larger, and then room air is changed with outdoor air indirectly again
Heat, room air and shower water carry out indirect heat exchange and indirect evaporation, to reduce indoor air temperature；When outdoor temperature is excessively high
When, not only start indirect refrigerating module and evaporation module simultaneously, refrigeration, such as compression mechanism can be also compensated by other cold sources
It is cold.Different use environments can be met, it is energy saving, natural cooling source can be made full use of, accomplishes the purpose of water-saving economize on electricity.
The present invention is further arranged to: in step S2, detection outdoor air enters dry-bulb temperature T when heat exchangerIt is dryThe room and
Outer air enters wet-bulb temperature T when heat exchangerIt is wet；
Work as TIt is dry< T0When, air quantity Q=Q of outdoor fan0；Work as T0< TIt is dry< T1When, air quantity Q=[(Q of outdoor fanIt is maximum-Q0)/
(T1-T0)] (TIt is dry-T1)+QIt is maximum；Work as TIt is dry> T0When, air quantity Q=Q of outdoor fanIt is maximum；
Work as TIt is dry-TIt is wetAt=0 DEG C, revolving speed N=0 of the first water pump；As 0 DEG C of < TIt is dry-TIt is wetAt 5 DEG C of <, revolving speed N=N of the first water pumpIt is maximum/5
(TIt is dry-TIt is wet)；
Wherein, T0For the minimum temperature of outdoor setting, Q0For outdoor minimum operation air quantity, QIt is maximumAccording to the maximum system of indoor needs
Cooling capacity and the temperature difference determine, NIt is maximumAccording to maximum quantity of wind and water by when mass values determine.
By using above-mentioned technical proposal, under different working modes, the revolving speed of outdoor fan, the first water pump are controlled
The revolving speed of revolving speed and/or the second water pump, under the premise of energy saving, so that the heat exchanger effectiveness of outdoor air and room air
More preferably.
The present invention is further arranged to: the first temperature threshold T1It is 16 DEG C, the second temperature threshold value T2It is 20 DEG C,
The third temperature threshold T3It is 30 DEG C.
In conclusion advantageous effects of the invention are as follows: indirect refrigerating module and evaporation module carry out outdoor air
Indirectly cooling and directly evaporation, can allow outdoor air to obtain more cooling capacity, to can preferably reduce room in heat exchanger
Interior temperature；The cooling water for evaporating module simultaneously can also further decrease room temperature with room air mediate contact.According to first
The outdoor temperature size of detection module detection, control module select different cooling mode of operation, including close cooling mould indirectly
Block and evaporation module, start indirect refrigerating module, start indirect refrigerating module and evaporation module；Different uses can be met in this way
Environment, it is energy saving, natural cooling source can be made full use of, accomplishes the purpose of water-saving economize on electricity.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the system block diagram of the embodiment of the present invention.
In figure, 1, heat exchanger；2, water tank；3, heat exchange coil；4, the first water inlet pipe；5, return pipe；6, the first water pump；7, it sprays
Drench head；8, the second water inlet pipe；9, the second water pump；10, outdoor fan；11, indoor fan；12, first filter；13, the second mistake
Filter.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
A kind of evaporative cooling system, as depicted in figs. 1 and 2, including indirect refrigerating module, evaporation module, heat exchanger 1, room
Interior air supply module, outdoor air supply module, first detection module and control module, indoor air supply module are used for the conveying of room air
Make it by heat exchanger 1, conveying of the outdoor air supply module for outdoor air makes it successively pass through indirect refrigerating module, evaporation mold
Block and heat exchanger 1；Indirect refrigerating module for outdoor air and its cooling water mediate contact to carry out heat exchange, use by evaporation module
Directly contacted with its cooling water in outdoor air to carry out heat exchange, heat exchanger 1 for room air respectively with outdoor air, steam
The cooling water mediate contact of hair module is delivered to interior after carrying out heat exchange；First detection module is controlled for detecting outdoor temperature
Molding block is communicated to connect with indirect refrigerating module, evaporation module and first detection module respectively, and control module is according to receiving the
The temperature value of one detection module detection is to control indirect refrigerating module and evaporate the opening and closing of module.
According to the outdoor temperature size that first detection module detects, control module selects different cooling mode of operation, wraps
Include the mode for closing indirect refrigerating module and evaporation module, start the mode of indirect refrigerating module, start indirect refrigerating module and
Evaporate template pattern；Different use environments can be met in this way, it is energy saving, natural cooling source can be made full use of, accomplish it is water-saving,
The purpose of economize on electricity.Wherein, control module is central controller.
Indirect refrigerating module includes water tank 2 and heat exchange coil 3, and the first water inlet pipe is communicated between water tank 2 and heat exchange coil 3
4 and return pipe 5, the first water pump 6 for the water of water tank 2 to be delivered to heat exchange coil 3 is installed on first water inlet pipe 4, first
Water pump 6 and control module communicate to connect；Water in water tank 2 is pumped into heat exchange coil 3 by the first water pump 6, outdoor air with change
The heat exchange coil of hot coil 3 contacts, to exchange heat to outdoor air, reduces the temperature of outdoor air；By heat exchange coil 3
Cooling water be back in water tank 2 by return pipe 5, to be recycled to water resource, reduce the water consumption of WUE(air-conditioning/
The energy consumption of computer room) value；Control module reaches the control of water flow in exchange hot coil 3 by the revolving speed of the first water pump 6 of control.
Wherein, first filter 12 is installed on the first water inlet pipe 4, it is cold to being flowed in the first water inlet pipe 4 by first filter 12
But water is filtered.
Evaporation module includes the water tank 2 and multiple spray heads 7 positioned at 1 top of heat exchanger positioned at 1 lower section of heat exchanger, water tank
It is communicated with the second water inlet pipe 8 between 2 and spray head 7, is equipped on the second water inlet pipe 8 for the water of water tank 2 to be delivered to spray
First 7 the second water pump 9, the second water pump 9 are communicated to connect with control module；Cooling water in water tank 2 is pumped into spray by the second water pump 9
It drenches at head 7, and is sprayed through spray head 7 to heat exchanger 1, part cooling water is directly contacted with outdoor air, and empty with outdoor
Gas occurs directly evaporation and is taken away by outdoor air, reaches the temperature for reducing outdoor air；Part cooling water along heat exchanger 1 pipe
Road is flow back into water tank 2, and indirect evaporation occurs to cool down to room air with room air, to recycle benefit to water resource
With reducing water consumption/computer room energy consumption of WUE(air-conditioning) value；Control module is reached by the revolving speed of the second water pump 9 of control
Control to spray water flow in spray head 7.Wherein, second filter 13 is installed on the second water inlet pipe 8, passes through the second filtering
Device 13 is filtered the cooling water flowed in the second water inlet pipe 8.
Outdoor air supply module includes outdoor fan 10, and outdoor fan 10 and control module communicate to connect；Outdoor fan 10 is right
It is conveyed into the outdoor air in heat exchanger 1, control module is reached by the revolving speed of control outdoor fan 10 to outdoor wind
Measure the control of size.Indoor air supply module includes indoor fan 11,11 pairs of the indoor fan room airs entered in heat exchangers 1 into
Row conveys, and indoor air flow channel and outdoor air runner are not connected in heat exchanger 1.
When indirect refrigerating module and evaporation module are turned off, control module and outdoor air supply module are communicated to connect, control
Module according to receive first detection module detection temperature value with the air quantity of air supply module outside control room.It can not have to open
Any evaporation refrigerating module operation, is only exchanged heat in heat exchanger 1 by outdoor Cryogenic air and room air to indoor offer
Cooling capacity, this operating condition are known as dry cooling condition；Because the thermic load and the indoor air blow and return temperature difference in computer room be it is fixed, generally
The range that the flow of room air keeps certain is constant, and the flow of outdoor air is adjusted according to outdoor temperature, so that outdoor empty
The heat exchange effect of gas and room air is more preferable.
It further include the second inspection for detecting dry-bulb temperature when outdoor air enters heat exchanger 1 when the starting of indirect refrigerating module
Module is surveyed, control module is communicated to connect with outdoor air supply module and the second detection module respectively, and control module is according to receiving the
The temperature value of two detection modules detection is with the air quantity of air supply module outside control room, and control module is according to receiving first detection module
The temperature difference with the detection of the second detection module is to control the cooling water flow of indirect refrigerating module.Cooling mould indirectly can be opened
Block does indirect cooling and indirect evaporation to outdoor air by heat exchange coil 3, reduces the temperature of outdoor air, during this, changes
Water circulation use in hot coil 3 can save water resource；According to the temperature difference of 1 inlet temperature of heat exchanger and outdoor temperature come
The cooling water flow of indirect refrigerating module is adjusted, to realize the preliminary purpose for reducing room air.
It further include the third detection for detecting wet-bulb temperature when outdoor air enters heat exchanger 1 when evaporation module starts
Module, control module and third detection module communicate to connect, and control module is according to receiving the second detection module and third detection
The temperature difference of module detection is to control the cooling water flow for evaporating module.Indirect refrigerating module and evaporation module are opened simultaneously, are led to
It crosses heat exchange coil 3 and does indirect cooling and indirect evaporation to outdoor air, reduce the temperature of outdoor air, then pass through spray head 7
Directly evaporating to outdoor air reduces outside air temperature, and outdoor air have passed through in whole process exchanges heat twice, heat exchange amount compared with
Greatly, the temperature drop of outdoor air is larger, and last room air carries out indirect heat exchange, Interior Space with outdoor air again at heat exchanger 1
Gas and shower water carry out indirect heat exchange and indirect evaporation, to reduce indoor air temperature；According to 1 inlet dry-bulb temperature of heat exchanger
The cooling water flow and spray pressure of evaporation module are adjusted with the temperature difference of wet-bulb temperature, so that realize reduces room air again
Purpose.
Evaporative cooling system control method, comprising the following steps: S1, the first temperature threshold T of setting1, second temperature threshold value T2
With third temperature threshold T3, and T1< T2< T3, wherein T1It is 16 DEG C, T2It is 20 DEG C, T3It is 30 DEG C；S2, outdoor air is detected
Dry-bulb temperature T；S3, the operating mode that cooling system is controlled according to dry-bulb temperature T: as T < T1When, close indirect refrigerating module and
Evaporate module；Work as T1< T < T2When, start indirect refrigerating module, closes evaporation module；Work as T2< T < T3When, starting is indirectly cold
But module and evaporation module；As T > T3When, start indirect refrigerating module and evaporation module, and system is compensated by other cold sources
It is cold.
In step S2, detection outdoor air enters dry-bulb temperature T when heat exchanger 1It is dryWhen entering heat exchanger 1 with outdoor air
Wet-bulb temperature TIt is wet；Work as TIt is dry< T0When, air quantity Q=Q of outdoor fan 100；Work as T0< TIt is dry< T1When, the air quantity Q of outdoor fan 10=
TIt is dry(QIt is maximum-Q0)/(T1-T0)；Work as TIt is dry> T0When, air quantity Q=Q of outdoor fan 10It is maximum；Work as TIt is dry-TIt is wetAt=0 DEG C, the first water pump 6
Revolving speed N=0；As 0 DEG C of < TIt is dry-TIt is wetAt 5 DEG C of <, revolving speed N=N of the first water pump 6It is maximum/ 5(TIt is dry-TIt is wet)；Wherein, T0For outdoor setting
Minimum temperature, Q0For outdoor minimum operation air quantity, QIt is maximumIt is determined according to the maximum cooling capacity of indoor needs and the temperature difference, NIt is maximumAccording to
Maximum quantity of wind and water by when mass values determine.V is the maximum (top) speed of outdoor fan 10, under normal circumstances Q0For blower
Revolving speed V*10% when air quantity；Revolving speed, the revolving speed of the first water pump 6 and/or the revolving speed of the second water pump 9 of outdoor fan 10 are controlled,
Under the premise of energy saving, so that the heat exchanger effectiveness of outdoor air and room air is more preferable.
Outdoor air is cooled down by the second water pump 9, main mechanism is by dry-bulb temperature TIt is dryIt is direct by humidifying
It is cooled to wet-bulb temperature TIt is wet, direct evaporating-cooling efficiency of the general warranty during this can pass 90% or more by temperature and humidity
Sensor detected.Need to open compressor to compensate refrigeration, the revolving speed control of compressor can pass through P demand under normal circumstances
Or PID is controlled.
According to the size of outdoor temperature, different operating modes is selected: when outdoor temperature is lower, closing cooling mould indirectly
Block and evaporation module only carry out heat exchange by outdoor Cryogenic air and room air to give indoor offer cold in heat exchanger 1
Amount, this operating condition are known as dry cooling condition；When outdoor temperature is in medium temperature, it can star indirect refrigerating module, pass through heat exchange coil 3
Indirect cooling and indirect evaporation are done to outdoor air, reduces the temperature of outdoor air, during this, the water of heat exchange coil 3 is recycled
It utilizes, water resource can be saved.
When outdoor temperature is higher, indirect refrigerating module and evaporation module can be started simultaneously, give room by heat exchange coil 3
Outer air does indirect cooling and indirect evaporation, reduces the temperature of outdoor air, is then directly steamed by spray head 7 to outdoor air
Hair reduces outside air temperature, and outdoor air have passed through heat exchange twice in whole process, and heat exchange amount is larger, the temperature of outdoor air
Degree reduces larger, and then room air carries out indirect heat exchange with outdoor air again, and room air is changed indirectly with shower water
Heat and indirect evaporation, to reduce indoor air temperature；When outdoor temperature is excessively high, not only start indirect refrigerating module and steaming simultaneously
Module is sent out, refrigeration, such as compressor refrigeration can be also compensated by other cold sources.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (10)
1. a kind of evaporative cooling system, which is characterized in that sent including indirect refrigerating module, evaporation module, heat exchanger (1), interior
Wind module, outdoor air supply module, first detection module and control module, the interior air supply module are used for the conveying of room air
Make it by the heat exchanger (1), it is described indirect that the conveying that the outdoor air supply module is used for outdoor air passes through it successively
Refrigerating module, the evaporation module and the heat exchanger (1)；The indirect refrigerating module is used between outdoor air and its cooling water
To carry out heat exchange, the evaporation module is directly contacted with its cooling water for outdoor air to carry out heat exchange, institute for contact
It states the cooling water mediate contact of heat exchanger (1) for room air respectively with outdoor air, the evaporation module and carries out heat exchange
After be delivered to interior；The first detection module for detecting outdoor temperature, the control module respectively with the indirect cooling
Module, the evaporation module and first detection module communication connection, the control module are examined according to receiving described first
The temperature value of module detection is surveyed to control the opening and closing of the indirect refrigerating module and the evaporation module.
2. a kind of evaporative cooling system according to claim 1, which is characterized in that when the indirect refrigerating module and described
When evaporation module is turned off, the control module and the outdoor air supply module are communicated to connect, and the control module is according to reception
The air quantity of the outdoor air supply module is controlled to the temperature value of first detection module detection.
3. a kind of evaporative cooling system according to claim 1, which is characterized in that when the indirect refrigerating module starts
When, it further include the second detection module for detecting dry-bulb temperature when outdoor air enters the heat exchanger (1), the control module point
It is not communicated to connect with the outdoor air supply module and second detection module, the control module is according to receiving described second
The temperature value of detection module detection is to control the air quantity of the outdoor air supply module, and the control module is according to receiving described the
One detection module and the temperature difference of second detection module detection are to control the cooling water flow of the indirect refrigerating module.
4. a kind of evaporative cooling system according to claim 3, which is characterized in that when the evaporation module starts,
It further include the third detection module for detecting wet-bulb temperature when outdoor air enters the heat exchanger (1), the control module and institute
State third detection module communication connection, the control module according to receive second detection module and the third detection mould
The temperature difference of block detection is to control the cooling water flow for evaporating module.
5. a kind of evaporative cooling system according to claim 1,2,3 or 4, which is characterized in that the indirect refrigerating module
Including water tank (2) and heat exchange coil (3), the first water inlet pipe (4) are communicated between the water tank (2) and the heat exchange coil (3)
With return pipe (5), it is provided with for the water of the water tank (2) to be delivered to the heat exchange coil on first water inlet pipe (4)
(3) the first water pump (6), first water pump (6) and the control module communicate to connect.
6. a kind of evaporative cooling system according to claim 1,2,3 or 4, which is characterized in that the evaporation module includes
Water tank (2) and multiple spray heads (7) above the heat exchanger (1) below the heat exchanger (1), the water tank
(2) it is communicated with the second water inlet pipe (8), is provided on second water inlet pipe (8) for will be described between the spray head (7)
The water of water tank (2) is delivered to the second water pump (9) of the spray head (7), and second water pump (9) communicates with the control module
Connection.
7. a kind of evaporative cooling system according to claim 1,2,3 or 4, which is characterized in that the outdoor air supply module
Including outdoor fan (10), the outdoor fan (10) and the control module are communicated to connect.
8. a kind of evaporative cooling system control method, which comprises the following steps:
S1, the first temperature threshold T of setting1, second temperature threshold value T2With third temperature threshold T3, and T1< T2< T3；
S2, the dry-bulb temperature T for detecting outdoor air；
S3, the operating mode that cooling system is controlled according to dry-bulb temperature T:
As T < T1When, close indirect refrigerating module and evaporation module；
Work as T1< T < T2When, start indirect refrigerating module, closes evaporation module；
Work as T2< T < T3When, start indirect refrigerating module and evaporation module；
As T > T3When, start indirect refrigerating module and evaporation module, and refrigeration is compensated by other cold sources.
9. a kind of evaporative cooling system control method according to claim 8, which is characterized in that
In step S2, dry-bulb temperature T when detection outdoor air enters heat exchanger (1) is dry and outdoor air enters heat exchanger (1)
When wet-bulb temperature T it is wet；
Work as TIt is dry< T0When, air quantity Q=Q of outdoor fan (10)0；Work as T0< TIt is dry< T1When, the air quantity Q of outdoor fan (10)=
[(QIt is maximum-Q0)/(T1-T0)] (TIt is dry-T1)+QIt is maximum；Work as TIt is dry> T0When, air quantity Q=Q of outdoor fan (10)It is maximum；
Work as TIt is dry-TIt is wetAt=0 DEG C, revolving speed N=0 of the first water pump (6)；As 0 DEG C of < TIt is dry-TIt is wetAt 5 DEG C of <, the revolving speed N of the first water pump (6)
=NIt is maximum/ 5(TIt is dry-TIt is wet)；
Wherein, T0For the minimum temperature of outdoor setting, Q0For outdoor minimum operation air quantity, QIt is maximumAccording to the maximum refrigeration of indoor needs
It measures with the temperature difference and determines, NIt is maximumAccording to maximum quantity of wind and water by when mass values determine.
10. a kind of evaporative cooling system control method according to claim 8, which is characterized in that first temperature threshold
Value T1It is 16 DEG C, the second temperature threshold value T2It is 20 DEG C, the third temperature threshold T3It is 30 DEG C.
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| CN111140950A (en) * | 2019-12-23 | 2020-05-12 | 南京壹格软件技术有限公司 | Data center indirect evaporative cooling system and control method |
| CN111928452A (en) * | 2020-07-31 | 2020-11-13 | 中国工商银行股份有限公司 | Control method, device and control system for indirect evaporative cooling unit |
| CN111928453A (en) * | 2020-07-31 | 2020-11-13 | 中国工商银行股份有限公司 | Method, device and system for controlling water storage tray of indirect evaporative cooling unit |
| CN112594809A (en) * | 2020-11-26 | 2021-04-02 | 依米康科技集团股份有限公司 | Subway channel type evaporative cold water cooling air system and control method |
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| CN114087660A (en) * | 2021-12-25 | 2022-02-25 | 广东冠哲环保科技有限公司 | Air conditioner and control method thereof |
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