CN110118405A - A kind of cooling water system and its control method - Google Patents
A kind of cooling water system and its control method Download PDFInfo
- Publication number
- CN110118405A CN110118405A CN201910522312.1A CN201910522312A CN110118405A CN 110118405 A CN110118405 A CN 110118405A CN 201910522312 A CN201910522312 A CN 201910522312A CN 110118405 A CN110118405 A CN 110118405A
- Authority
- CN
- China
- Prior art keywords
- water
- flow
- cooling
- cooling tower
- return
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000498 cooling water Substances 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 212
- 238000001816 cooling Methods 0.000 claims abstract description 168
- 238000005057 refrigeration Methods 0.000 claims abstract description 10
- 238000011897 real-time detection Methods 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 16
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 description 12
- 238000005265 energy consumption Methods 0.000 description 9
- 230000009466 transformation Effects 0.000 description 8
- 230000007423 decrease Effects 0.000 description 6
- 238000004134 energy conservation Methods 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000009849 deactivation Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 210000004262 dental pulp cavity Anatomy 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 206010021036 Hyponatraemia Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
Classifications
-
- 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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
- F28C2001/006—Systems comprising cooling towers, e.g. for recooling a cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F25/00—Component parts of trickle coolers
- F28F2025/005—Liquid collection; Liquid treatment; Liquid recirculation; Addition of make-up liquid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention discloses a kind of cooling water system and its control methods, including refrigeration unit, water inlet manifold, cooling water pump, water inlet pipe, cooling tower, cooling system balance controller, the general pipeline flow balance valve being arranged on water inlet manifold, the branch pipe flow balance valve being arranged on water inlet pipe, total flow of inlet water parameter in water inlet manifold is detected, cooling tower booting number of units is determined according to the minimum feed water flow magnitude of each cooling tower；The flow of inlet water in each water inlet pipe is detected, branch pipe flow equilibrium valve opening is adjusted according to the maximum feed water flow magnitude of each cooling tower, control water inlet pipe actual flow is less than or equal to the maximum feed water flow magnitude of cooling tower；Total flow of inlet water in real-time detection water inlet manifold and the cooling tower quantity under open state, determine the average flow of inlet water of each cooling tower under open state, and export as real-time traffic setting value to each branch pipe flow balance valve, for adjusting the aperture of each branch pipe flow balance valve.Present system hydraulic equilibrium, energy saving in running are stablized.
Description
Technical field
The present invention relates to a kind of cooling water balance control techniques, more particularly, to a kind of variable flow cooling water system water balance
Control technique.
Background technique
Common central air conditioner system includes several refrigeration units, several water circulating pumps, several cooling towers, wherein
Refrigeration unit provides chilled water and supplies fan coil heat exchange, and water circulating pump driving cooling water follows between refrigeration unit and cooling tower
Ring, cooling water carry out heat exchange with air in cooling tower, and the cooling water after cooling is sent into refrigeration unit by water circulating pump and is used
In cooling.The main purpose that cooling water system is arranged in central air conditioner system is that the heat of condenser and atmosphere are carried out hot friendship
It changes, obtains water at low temperature for Central air-conditioning unit and run use.Cooling water temperature is larger for the energy consumption of central air conditioner system,
The data provided according to each air-conditioning producer of mainstream rise 1 DEG C it is found that cooling water temperature is every, and host energy consumption can rise 3-5%, cooling
Every 1 DEG C of the decline of coolant-temperature gage, host energy consumption reduce 3-5%.Therefore, in cooling water system cooling tower exchange capability of heat promotion, for
Whole system energy conservation influences huge.
The building form of cooling water system includes following several forms in common central air conditioner system:
1, it directlys adopt the corresponding single cooling tower of single refrigeration unit, single cycle water pump and establishes multiple circulating water lines.This side
Formula can carry out water adjustment to single circulating water line respectively, can also add cooling tower frequency control.But this mode
Under, when some equipment breaks down, interchangeability is poor, cannot carry out heat exchange using the big heat dissipation area of Cooling Towers, cannot
The energy-efficient mode for realizing the big temperature difference of small water does not have any help for the energy conservation of entire air-conditioning system.In addition, cooling tower
Although can only realize that separate unit is adjusted respectively for circulating water line using frequency control, low turn when leading to frequency conversion
The control range of speed is small, and noise is big, can not achieve the energy-saving effect of more low frequencies operating.
2, it is arranged in such a way that cooling water system supplies water with journey, i.e., from water circulating pump to the feed water inlet distance of each cooling tower
Essentially identical, pressure of supply water is identical, and cooling water pipeline needs to become the design of three root canals from the design of original two pipes.Using
The reason of this mode is that there are sequencings because of the different cooling towers being connected on pipeline, will lead to front and back water resistance difference,
Actual inflow also has a significant impact, and the cooling tower water flow close to water pump end is larger, overcurrent situation occurs, and it is cooling to broadcast water pond
Overflow can be generated when dilutional hyponatremia, cause just to be directly entered circulation without cooling heat dissipation, and the cooling tower far from water pump end is in the presence of deficient
Flow phenomenon, radiating efficiency receive influence.Using same journey way of supplying water, the pressure of supply water phase of different cooling towers can be effectively realized
Together, to avoid the occurrence of the situation of overcurrent or undercurrent.But due to increasing a root canal, and have the shortcomings that following: due in
Entreat air-conditioner set and water circulating pump to be arranged in basement more, and the outdoor of air circulation, pipeline distance is arranged in cooling tower more
Farther out, increase pipeline inevitably results in equipment investment cost and operating expenses is significantly increased, and adding pipeline can increase simultaneously
The resistance of valve arrangement, cooling water system is also increase accordingly, and water circulating pump is also required to increase lift, and longtime running energy consumption is also corresponding
Increase.
Therefore, in order to promote the efficiency of cooling system, maximum energy-saving effect is obtained, cooling water circulation loop is wanted
Carry out necessary flow control.
In view of the above-mentioned problems, constant flow central air conditioner cooling system often relies on the experience of master craftsman to cold in debugging
But the valve of water system is manually adjusted, and the waterpower for reaching opposite is evenly distributed.But this debugging is complete based on all water pumps
Open, at full capacity in the case of the debugging that carries out, the most of the time is all the situation of low discharge when running, and recycles
Water flow is to change at any time because of meeting for Central air-conditioning unit, and initial debugging does not have too in the daily use of system
More effects and effect.
Summary of the invention
A kind of the object of the present invention is to provide structures cooling water system simple, easy for construction and being conveniently adjusted system balancing
System.
It is a further object to provide one kind can effectively realize variable flow cooling water system balance and energy-efficient
Cooling water system control method.
The technical solution of the invention is as follows: a kind of cooling water system, including several refrigeration units, chilled(cooling) water return (CWR),
Several are arranged in parallel cooling water pump on chilled(cooling) water return (CWR), are arranged in parallel on chilled(cooling) water return (CWR) cooling water branch, simultaneously
Join several cooling towers being arranged on cooling water branch road, be equipped with blower in cooling tower, wherein chilled(cooling) water return (CWR) includes that water inlet is total
Pipe and return main, cooling water branch include water inlet pipe and return branch, cooling system balance controller are additionally provided with, described
Water inlet manifold is equipped with the general pipeline flow balance valve for controlling water inlet total amount, is respectively provided on each water inlet pipe
Control cooling tower flow of inlet water branch pipe flow balance valve, cooling system balance controller for receive general pipeline flow balance valve and
The real-time traffic data of branch pipe flow balance valve, and control the cooling tower startup-shutdown and rotation speed of fan and branch pipe flow balance valve
Aperture.
General pipeline flow balance valve is set on water inlet manifold, can detecte the water inlet total amount that control enters cooling tower, from whole
System water flow is controlled and adjusted on body, branch pipe flow balance valve is set on water inlet pipe, it can be every with independent control
The inflow of a cooling tower, cooling system balance controller is on the basis of receiving water inlet manifold water inlet total amount, according to each cooling
The working condition of tower determines the practical inflow of each cooling tower, by adjust corresponding branch pipe flow equilibrium valve opening adjust into
The water for entering each cooling tower can also be by deactivation portion cooling tower, and extremely by total Water reasonable distribution when total Water decline
In the part cooling tower of starting, and the inflow in cooling tower can be actually entered according to distribution flow value control, made entire
Water system is balanced and flow control, avoids because of overcurrent or undercurrent situation caused by waterpower is uneven, realizes low discharge, big
Maximum energy-saving effect is realized in the chilled(cooling) water supply (CWS) of the temperature difference, and construction also facilitates, and saves project cost, simplifies installation procedure,
Be conducive to carry out rapid refit on the basis of existing cooling tower.
It is respectively provided with the temperature sensor of detection return water temperature in each return branch, and outputs signal to institute
It states in cooling system balance controller.Return water temperature is detected using temperature sensor, to find to break down in time or to exchange heat
The cooling tower of ability decline, is conducive to safeguards system energy-saving efficiency.
Another technical solution of the invention is: a kind of control method of cooling water system, including while or successively holding
Capable following steps: total flow of inlet water parameter 1., in detection water inlet manifold, it is true according to the minimum feed water flow magnitude of each cooling tower
Determine cooling tower booting number of units；2., the flow of inlet water in each water inlet pipe of detection, according to the maximum feed water flow magnitude tune of each cooling tower
Branch pipe flow equilibrium valve opening is saved, control water inlet pipe actual flow is less than or equal to the maximum feed water flow magnitude of cooling tower；3., it is real
When detection water inlet manifold in total flow of inlet water and the cooling tower quantity under open state, determine each cooling under open state
The average flow of inlet water of tower, and export as real-time traffic setting value to each branch pipe flow balance valve, for adjusting each branch pipe stream
Measure the aperture of balanced valve.
The total flow of inlet water for determining water inlet manifold is to confirm cooling tower booting number of units for convenience, small in total flow of inlet water
In the case where the sum of each cooling tower flow of inlet water, deactivation portion cooling tower can both guarantee the heat exchange for giving full play to cooling tower
Ability, and be conducive to reduce the energy consumption of entire cooling tower；Detect the flow of inlet water of water inlet pipe, it can be ensured that according to cooling Deethanizer design
The practical water inlet of inflow control avoids because tube side distance causes into water unevenness；According to total Water and booting cooling tower quantity, really
The average flow of inlet water for determining every cooling tower under operating status controls practical inflow by branch pipe flow balance valve, can be with
It fully ensures that each cooling tower of booting can be run under optimal operational condition, realizes cooling water balance；Due to cooling
Water inventory is monitored, and the cooling tower of starting is determined according to total Water, and ensures the cooling tower being switched in optimum operation shape
It works under state, to ensure hydraulic equilibrium on the whole, runs more stable, realization energy conservation to greatest extent.
Step 1. in, the minimum feed water flow magnitude of each cooling tower is with the normal flow of the cooling tower multiplied by changeable flow system
It counts and determines, cooling tower booting number of units is true divided by the minimum feed water flow magnitude and round numbers of each cooling tower with total flow of inlet water
It is fixed.Changeable flow coefficient can be determined according to the actual condition of different cooling towers, obtain the minimum water inlet within the scope of best effort
Flow, convenient for being controlled on the whole to system run all right and energy-saving effect.
It is further comprising the steps of, 4., real-time detection be in the water inlet in the water inlet pipe under shutdown status where cooling tower
Flow, when the flow of inlet water of detection is greater than 0, output maintenance alarm.Facilitate discovery break down cooling tower, avoid without
The water inlet of heat dissipation is directly entered in cooling water return pipe road, it is ensured that whole energy-saving effect.
It is further comprising the steps of, real-time return water temperature 5., in each return branch of detection, and with each return branch return water temperature
Degree setting value compares, and when real-time return water temperature is more than 0.3 DEG C degree Celsius of setting value, exports the maintenance report of corresponding return branch
It is alert.It is detected by return water temperature, discovery in time is broken down or the cooling tower of exchange capability of heat decline, avoids the water inlet without heat dissipation
It is directly entered in cooling water return pipe road, it is ensured that whole energy-saving effect.
The invention has the advantages that the hydraulic equilibrium of system may be implemented, operation is more stable, and cooling tower can be in its work model
Enclosing the controllable heat exchange of interior realization, it is ensured that cooling water temperature and flow are constant, are advantageously implemented maximum energy conservation, easy for construction,
Low cost, transformation repacking are easy, and long-term running economic effect is higher.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the embodiment of the present invention；
1, refrigeration unit, 2, cooling water pump, 3, cooling tower, 4, general pipeline flow balance valve, 5, branch pipe flow balance valve, 6, branch
Flow sensor tube, 7, total flow sensor tube, 8, temperature sensor, 9, cooling system balance controller, 10, cooling water pump change
Frequency controller, 11, water inlet manifold, 12, return main, 13, water inlet pipe, 14, return branch.
Specific embodiment
Embodiment:
It refering to fig. 1, is a kind of cooling water system, including several refrigeration units 1, chilled(cooling) water return (CWR), several parallel connections are set
It sets the cooling water pump 2 on chilled(cooling) water return (CWR), the cooling water branch being arranged in parallel on chilled(cooling) water return (CWR), be arranged in parallel in cooling
Several cooling towers 3 of water branch road, cooling tower 3 is interior to be equipped with blower, and wherein chilled(cooling) water return (CWR) includes water inlet manifold 11 and return water
General pipeline 12, cooling water branch include water inlet pipe 13 and return branch 14, are additionally provided with cooling system balance controller 9 and cooling water
Pump frequency conversion controller 10 is equipped with the general pipeline flow balance valve 4 for controlling water inlet total amount on water inlet manifold 11, in each water inlet branch
It is respectively provided with the branch pipe flow balance valve 5 of control 3 flow of inlet water of cooling tower on pipe 13, is set respectively in each return branch 12
There is the temperature sensor 8 for detecting return water temperature, and outputs signal to cooling system balance controller 9 and cooling water pump frequency conversion
In controller 10, cooling system balance controller 9 is for receiving 8 output data of temperature sensor, general pipeline flow balance valve 4 and branch
The real-time traffic data of pipe flow balance valve 5, and control 3 startup-shutdown of cooling tower and rotation speed of fan and branch pipe flow balance valve 5
Aperture.Cooling water pump frequency-variable controller 10 is used to receive the return water temperature data of temperature sensor 8, and controls cooling water pump 2 and open
Stop and frequency conversion.
General pipeline flow balance valve 4 is set on water inlet manifold 11, can detecte the water inlet total amount that control enters cooling tower 3,
System water flow is controlled and adjusted on the whole, branch pipe flow balance valve 5 is set on water inlet pipe 13, it can be independent
Control the inflow of each cooling tower 3, cooling system balance controller 10 on the basis of receiving water inlet manifold water inlet total amount, according to
The working condition of each cooling tower 3 determines the practical inflow of each cooling tower 3, by adjusting corresponding branch pipe flow equilibrium
5 aperture of valve is adjusted into the water of each cooling tower 3, can also be by deactivation portion cooling tower 3 when total Water decline, and incites somebody to action
In total Water reasonable distribution to the part cooling tower 3 of starting, and cooling tower 3 can be actually entered according to distribution flow value control
Interior inflow is balanced entire water system and flow control, avoids because of overcurrent or undercurrent caused by waterpower is uneven
Situation realizes the chilled(cooling) water supply (CWS) of low discharge, the big temperature difference, realizes maximum energy-saving effect, and construction also facilitates, and saves project
Cost simplifies installation procedure, is conducive to carry out rapid refit on the basis of existing cooling tower.
A kind of control method of cooling water system, including the following steps executed simultaneously or successively:
1., detection water inlet manifold 11 in total flow of inlet water parameter, according to the minimum feed water flow magnitude of each cooling tower 3 determine
The booting number of units of cooling tower 3；The minimum feed water flow magnitude of each cooling tower 3 is with the normal flow of the cooling tower 3 multiplied by changeable flow system
It counts and determines, the booting number of units of cooling tower 3 is true divided by the minimum feed water flow magnitude and round numbers of each cooling tower 3 with total flow of inlet water
It is fixed.Assuming that cooling tower 3 can sit up uniformly in normal flow 30%, then its changeable flow coefficient is 30%, the total feed water flow of system
Measure ÷ (cooling tower normal flow × 30%)=N, take N integer be cooling tower booting number of units.
2., the flow of inlet water in each water inlet pipe 13 of detection, branch pipe is adjusted according to the maximum feed water flow magnitude of each cooling tower 3
5 aperture of flow balance valve, control water inlet pipe actual flow is less than or equal to the maximum feed water flow magnitude of cooling tower, to cooling tower 3
Carry out current limliting.
3., total flow of inlet water in real-time detection water inlet manifold 11 and 3 quantity of cooling tower under open state, determine
The average flow of inlet water of each cooling tower 3 under open state, cooling water total flow ÷ booting number of units N=is averaged flow of inlet water, by this
Average flow of inlet water is exported as real-time traffic setting value to each branch pipe flow balance valve 5, for adjusting each branch pipe flow equilibrium
The aperture of valve 5；
4., real-time detection be in the flow of inlet water in the water inlet pipe under shutdown status where cooling tower, when detection into
When water flow is greater than 0, output maintenance alarm；
5., the real-time return water temperature in each return branch of detection, and compared with each return branch return water temperature setting value, when
When real-time return water temperature is more than 0.3 DEG C degree Celsius of setting value, the maintenance alarm of corresponding return branch is exported.
The total flow of inlet water for determining water inlet manifold is to confirm cooling tower booting number of units for convenience, small in total flow of inlet water
In the case where the sum of each cooling tower flow of inlet water, deactivation portion cooling tower can both guarantee the heat exchange for giving full play to cooling tower
Ability, and be conducive to reduce the energy consumption of entire cooling tower；Detect the flow of inlet water of water inlet pipe, it can be ensured that according to cooling Deethanizer design
The practical water inlet of inflow control avoids because tube side distance causes into water unevenness；According to total Water and booting cooling tower quantity, really
The average flow of inlet water for determining every cooling tower under operating status controls practical inflow by branch pipe flow balance valve, can be with
It fully ensures that each cooling tower of booting can be run under optimal operational condition, realizes cooling water balance；Due to cooling
Water inventory ijnx monitoring, and the cooling tower started is determined according to total Water, and ensure the cooling tower being switched in optimum operation shape
It works under state, to ensure hydraulic equilibrium on the whole, runs more stable, realization energy conservation to greatest extent.
Pass through 13 flow of water inlet pipe of cooling tower 3 under detection shutdown status, when the flow of detection is not equal to 0, explanation
The shutdown status cooling tower 3 breaks down, and causes to occur into water, and the cooling tower for facilitating discovery to break down is avoided without scattered
The water inlet of heat is directly entered in cooling water return pipe road, it is ensured that whole energy-saving effect.
It is detected by the return water temperature to return branch 14, it is cold to find that failure or exchange capability of heat decline in time
But tower avoids the water inlet without heat dissipation from being directly entered in cooling water return pipe road, it is ensured that whole energy-saving effect.
To verify beneficial effects of the present invention, result is transformed below by way of actual items to illustrate:
In the international well-known hotel's project in Guangzhou Zengcheng, four 250m are used3The crossflow cooling tower of/h is common rule
Hotel's project of mould.When system is initially debugged, cooling water system balance adjustment is carried out according to 100% flow, for each cooling
The inlet valve of tower has carried out aperture adjustment, and it is 52-56mm that each cooling tower, which broadcasts water pond water storage height, determines each cooling tower water base
This balance, cooling water water distribution are uniform.
Before transformation: using conventional energy conservation model, air-conditioner host only starts 2, and cooling water pump is according to cooling at this time
Water passes in and out water temperature difference and carries out variable frequency adjustment, and when cooling water pump converting operation 2, frequency is in 40-42Hz, cooling water total flow
426m3/ h, start cooling tower 4, exchanged heat using the big heat dissipation area of cooling tower, 26.3 DEG C of outdoor wet-bulb temperature, into
At 32.1 DEG C of coolant-temperature gage, the water pond height of broadcasting of 4 cooling towers is respectively 46mm, 22mm, 18mm, 36mm, and cooling tower goes out water temperature
Degree is respectively 28.1 DEG C, 28.5 DEG C, 28.5 DEG C, 28.2 DEG C.
After transformation: carrying out water balance transformation to water system using the method for the present invention, same air-conditioner host starts 2, cooling
When pump variable frequency runs 2, for frequency in 45Hz, cooling water total flow is 452m3/ h, 4 cooling tower operations, in outdoor wet bulb temperature
At 26.2 DEG C, 32 DEG C of inflow temperature of degree, the water pond height of broadcasting of 4 cooling towers is respectively 34mm, 27mm, 26mm, 33mm, cooling tower
Leaving water temperature it is very stable, be 27.6 DEG C, realize cooling tower water supply balance substantially.
Two groups of data of comparison transformation front and back are it can be seen that the cooling water before transformation is not carried out in variable-flow operation
Water supply balance causes to exchange heat insufficient, and for average temperature at 28.3 DEG C, and after being transformed, system realizes water balance, and heat exchange uniformly, is put down
Equal water temperature reduces 0.7 DEG C with the average temperature before transformation at 27.6 DEG C, and the air conditioner it is found that before transformation is calculated by statistics
The whole energy consumption of group has been higher by 2% or more than the whole energy consumption of improved air-conditioner set.After numerical procedure of the invention,
It can effectively realize water balance, reduce whole energy consumption, be used for a long time down and use cost can be effectively reduced.
Above-listed detailed description is illustrating for one of present invention possible embodiments, and the embodiment is not to limit
The scope of the patents of the invention, all equivalence enforcements or change without departing from carried out by the present invention, is intended to be limited solely by the scope of the patents of this case
In.
Claims (6)
1. a kind of cooling water system, including several refrigeration units, chilled(cooling) water return (CWR), several are arranged in parallel in chilled(cooling) water return (CWR)
On cooling water pump, be arranged in parallel on chilled(cooling) water return (CWR) cooling water branch, be arranged in parallel it is several on cooling water branch road
A cooling tower, cooling tower is interior to be equipped with blower, and wherein chilled(cooling) water return (CWR) includes water inlet manifold and return main, and cooling water branch includes
Water inlet pipe and return branch, it is characterised in that: be additionally provided with cooling system balance controller, be equipped with and use on the water inlet manifold
In the general pipeline flow balance valve of control water inlet total amount, control cooling tower feed water flow is respectively provided on each water inlet pipe
The branch pipe flow balance valve of amount, cooling system balance controller are used to receive general pipeline flow balance valve and branch pipe flow balance valve
Real-time traffic data, and control the aperture of the cooling tower startup-shutdown and rotation speed of fan and branch pipe flow balance valve.
2. a kind of cooling water system according to claim 1, it is characterised in that: be respectively equipped in each return branch
For detecting the temperature sensor of return water temperature, and output signal in the cooling system balance controller.
3. a kind of control method of cooling water system according to claim 1, it is characterised in that: including holding simultaneously or successively
Capable following steps:
1., detection water inlet manifold in total flow of inlet water parameter, cooling tower is determined according to the minimum feed water flow magnitude of each cooling tower
Be switched on number of units；
2., the flow of inlet water in each water inlet pipe of detection, it is flat that branch pipe flow is adjusted according to the maximum feed water flow magnitude of each cooling tower
Weigh valve opening, and control water inlet pipe actual flow is less than or equal to the maximum feed water flow magnitude of cooling tower；
3., total flow of inlet water in real-time detection water inlet manifold and the cooling tower quantity under open state, determine booting shape
The average flow of inlet water of each cooling tower under state, and export as real-time traffic setting value to each branch pipe flow balance valve, for adjusting
Save the aperture of each branch pipe flow balance valve.
4. a kind of cooling water system control method according to claim 3, it is characterised in that: step 1. in, each cooling
The minimum feed water flow magnitude of tower determines with the normal flow of the cooling tower multiplied by changeable flow coefficient, cooling tower be switched on number of units with
Total flow of inlet water is determined divided by the minimum feed water flow magnitude and round numbers of each cooling tower.
5. a kind of cooling water system control method according to claim 3 or 4, it is characterised in that: it is further comprising the steps of,
4., real-time detection be in the flow of inlet water in the water inlet pipe under shutdown status where cooling tower, when the flow of inlet water of detection is big
When 0, output maintenance alarm.
6. a kind of cooling water system control method according to claim 3 or 4, it is characterised in that: it is further comprising the steps of,
5., the real-time return water temperature in each return branch of detection, and compared with each return branch return water temperature setting value, when real-time return water
When temperature is more than 0.3 DEG C degree Celsius of setting value, the maintenance alarm of corresponding return branch is exported.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522312.1A CN110118405A (en) | 2019-06-17 | 2019-06-17 | A kind of cooling water system and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522312.1A CN110118405A (en) | 2019-06-17 | 2019-06-17 | A kind of cooling water system and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110118405A true CN110118405A (en) | 2019-08-13 |
Family
ID=67524295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910522312.1A Pending CN110118405A (en) | 2019-06-17 | 2019-06-17 | A kind of cooling water system and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110118405A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542254A (en) * | 2019-08-30 | 2019-12-06 | 珠海格力电器股份有限公司 | Water chilling unit, inlet and outlet water pressure adjusting method thereof and air conditioning system |
| CN110671950A (en) * | 2019-10-31 | 2020-01-10 | 长沙经济技术开发区祥原动力供应有限公司 | Cooling tower cooling system based on flow change and application thereof |
| CN111023643A (en) * | 2019-12-31 | 2020-04-17 | 巨石集团有限公司 | Energy-saving control method of refrigerating system |
| CN111059030A (en) * | 2019-12-28 | 2020-04-24 | 宁波杭州湾新区祥源动力供应有限公司 | Air compressor three-stage cooling system and method based on dynamic independent control of cooling water quantity |
| CN111967150A (en) * | 2020-08-05 | 2020-11-20 | 江苏华电昆山热电有限公司 | Cooling capacity calculation method and device, computer equipment and storage medium |
| CN112378043A (en) * | 2020-11-12 | 2021-02-19 | 平安科技（深圳）有限公司 | Cooling water system control method, equipment, device and storage medium |
| CN112857078A (en) * | 2021-01-07 | 2021-05-28 | 西安木牛能源技术服务有限公司 | Dynamic hydraulic balance adjusting method and system for cooling tower group water system |
| CN113864977A (en) * | 2021-09-30 | 2021-12-31 | 珠海格力电器股份有限公司 | Cooling system, temperature control method and device thereof, equipment and air conditioning system |
| CN114413361A (en) * | 2022-01-20 | 2022-04-29 | 平顶山天安煤业股份有限公司 | Water supply mechanism for cooling tower, air conditioning system and control method |
| CN114608182A (en) * | 2020-12-03 | 2022-06-10 | 福建佰时德能源科技有限公司 | Cooling tower control method and control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090201645A1 (en) * | 2008-02-13 | 2009-08-13 | Hitachi Plant Technologies, Ltd. | Cooling system for electronic equipment |
| CN201539928U (en) * | 2009-09-09 | 2010-08-04 | 北京康孚环境控制有限公司 | Cooling tower and water chilling unit set combined cold supply system |
| CN202993476U (en) * | 2013-01-06 | 2013-06-12 | 唐华 | Energy-saving fine control system for building |
| JP2015197236A (en) * | 2014-03-31 | 2015-11-09 | 三機工業株式会社 | Refrigerator system |
| CN210107618U (en) * | 2019-06-17 | 2020-02-21 | 广东新菱空调科技有限公司 | Cooling water system |
-
2019
- 2019-06-17 CN CN201910522312.1A patent/CN110118405A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090201645A1 (en) * | 2008-02-13 | 2009-08-13 | Hitachi Plant Technologies, Ltd. | Cooling system for electronic equipment |
| CN201539928U (en) * | 2009-09-09 | 2010-08-04 | 北京康孚环境控制有限公司 | Cooling tower and water chilling unit set combined cold supply system |
| CN202993476U (en) * | 2013-01-06 | 2013-06-12 | 唐华 | Energy-saving fine control system for building |
| JP2015197236A (en) * | 2014-03-31 | 2015-11-09 | 三機工業株式会社 | Refrigerator system |
| CN210107618U (en) * | 2019-06-17 | 2020-02-21 | 广东新菱空调科技有限公司 | Cooling water system |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542254A (en) * | 2019-08-30 | 2019-12-06 | 珠海格力电器股份有限公司 | Water chilling unit, inlet and outlet water pressure adjusting method thereof and air conditioning system |
| WO2021036510A1 (en) * | 2019-08-30 | 2021-03-04 | 珠海格力电器股份有限公司 | Water chilling unit, outlet water regulating method, and air-conditioning system |
| CN110671950A (en) * | 2019-10-31 | 2020-01-10 | 长沙经济技术开发区祥原动力供应有限公司 | Cooling tower cooling system based on flow change and application thereof |
| CN111059030A (en) * | 2019-12-28 | 2020-04-24 | 宁波杭州湾新区祥源动力供应有限公司 | Air compressor three-stage cooling system and method based on dynamic independent control of cooling water quantity |
| CN111023643A (en) * | 2019-12-31 | 2020-04-17 | 巨石集团有限公司 | Energy-saving control method of refrigerating system |
| CN111967150A (en) * | 2020-08-05 | 2020-11-20 | 江苏华电昆山热电有限公司 | Cooling capacity calculation method and device, computer equipment and storage medium |
| CN111967150B (en) * | 2020-08-05 | 2023-12-29 | 江苏华电昆山热电有限公司 | Cooling capacity calculation method, device, computer equipment and storage medium |
| CN112378043A (en) * | 2020-11-12 | 2021-02-19 | 平安科技（深圳）有限公司 | Cooling water system control method, equipment, device and storage medium |
| CN112378043B (en) * | 2020-11-12 | 2022-09-27 | 平安科技（深圳）有限公司 | Cooling water system control method, equipment, device and storage medium |
| CN114608182A (en) * | 2020-12-03 | 2022-06-10 | 福建佰时德能源科技有限公司 | Cooling tower control method and control system |
| CN114608182B (en) * | 2020-12-03 | 2023-09-15 | 福建佰时德能源科技有限公司 | Cooling tower control method and control system |
| CN112857078A (en) * | 2021-01-07 | 2021-05-28 | 西安木牛能源技术服务有限公司 | Dynamic hydraulic balance adjusting method and system for cooling tower group water system |
| CN113864977A (en) * | 2021-09-30 | 2021-12-31 | 珠海格力电器股份有限公司 | Cooling system, temperature control method and device thereof, equipment and air conditioning system |
| CN114413361A (en) * | 2022-01-20 | 2022-04-29 | 平顶山天安煤业股份有限公司 | Water supply mechanism for cooling tower, air conditioning system and control method |
| CN114413361B (en) * | 2022-01-20 | 2023-07-18 | 平顶山天安煤业股份有限公司 | Water supply mechanism for cooling tower, air conditioning system and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110118405A (en) | A kind of cooling water system and its control method | |
| CN102607146B (en) | Central air-conditioning system and control method thereof | |
| CN104633857B (en) | Air conditioner energy-saving optimization control method and device | |
| CN201589376U (en) | Central air-conditioning variable water volume and variable air volume whole group-control energy saving system | |
| CN103383121A (en) | District air-conditioner distributed secondary pump system | |
| CN110895016A (en) | Fuzzy self-adaptive based energy-saving group control method for central air-conditioning system | |
| CN2898692Y (en) | Intelligent energy-saving control system of central air conditioner | |
| CN106051959A (en) | Energy conservation optimization system for central air conditioner | |
| CN205505293U (en) | Take box -like new trend system of many fresh air processing units of static pressure case | |
| CN107401806A (en) | Main frame and refrigerating water pump comprehensive energy efficiency lifting control method in central air conditioning freezing station | |
| CN104534917A (en) | Energy-saving control device and method for closed cooling circulation system | |
| CN101865496A (en) | Chilled water direct supply system and method | |
| CN113701321B (en) | Energy-saving frequency conversion control method for central air-conditioning water pump | |
| CN106440549A (en) | Control system for increasing comprehensive energy efficiency ratio of central air conditioning system | |
| CN112556098A (en) | Dynamic hydraulic balance control method | |
| CN203893368U (en) | Self-adaption throttling control equipment for cooling water pump of central air-conditioning water-chilling unit | |
| CN115823706A (en) | Primary pump self-adaptive variable pressure difference energy-saving control system and method | |
| CN210107618U (en) | Cooling water system | |
| CN202149568U (en) | Cold-hot water set and central air-conditioning system | |
| CN203258800U (en) | Central air conditioner dynamic tracking energy-saving management control system | |
| CN202581682U (en) | Central air-conditioning system | |
| CN212132815U (en) | Intelligent cold station control system | |
| CN103032937A (en) | Matching system for pump head flow of central air-conditioning water system and resistance flow of air-conditioning pipeline system | |
| CN101561173B (en) | Electricity-saving system of circulating pump in central air conditioner | |
| CN203274139U (en) | Intelligent control system based on air conditioner cooling water system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 510665 unit 1002, 10th floor, building C1, innovation building, No. 182, science Avenue, Science City, Guangzhou high tech Industrial Development Zone, Guangdong Province Applicant after: Guangdong new air conditioning technology Co., Ltd. Address before: 510665 Sixth Floor, No. 12 Jianzhong Road, Tianhe Science Park, Guangzhou City, Guangdong Province Applicant before: Guangdong new air conditioning technology Co., Ltd. |