CN201003930Y - A cooling tower - Google Patents
A cooling tower Download PDFInfo
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- CN201003930Y CN201003930Y CNU2006201329394U CN200620132939U CN201003930Y CN 201003930 Y CN201003930 Y CN 201003930Y CN U2006201329394 U CNU2006201329394 U CN U2006201329394U CN 200620132939 U CN200620132939 U CN 200620132939U CN 201003930 Y CN201003930 Y CN 201003930Y
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Abstract
The utility model discloses a cooling water tower which comprises a main water tower body, a thermograph, a water pump which can be controlled by frequency conversion, a plurality of temperature measure devices and controllers with a calculating function. Some necessary data such as the maximal permissible operation range of the cooling water tower, heat transporting performance, relational expression of the wet bulb temperature of the air outside and the nearness, are calculated by using a numerical method and built in the controllers. When the cooling tower works, the temperature measure devices are used for measuring and the program is transferred to the controllers where the real data is compared with the pre-calculated data to get the best cooling water flow value as well as cooling air flow value. And then the controllers respectively realize controls over a cooling water pump as well as a cooling fan in the cooling water tower to reach the most proper flow. The utility model can adjust not only the cooling air flow automatically but also the cooling water flow so as to save the energy used by the cooling water tower largely.
Description
Technical field
The utility model relates to a kind of air-conditioning system, refers in particular to a kind of cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically that is used for air-conditioning system.
Background technology
Along with domestic people's livelihood affluence, the use amount of central air conditioner system also increases thereupon, causes the power consumption of air-conditioning to become one of high main cause of spike electricity consumption in summer.How to improve the service efficiency of air conditioner energy source,, become one of important topic of domestic energy savings policy to reduce spike power consumption in summer.
The main element configuration of known central air conditioner system and operating principle comprise the circulatory system of five road exchange heat as shown in Figure 1 basically, and outside one by one by the room conditioning load in left side, existing room air and cooling coil 4 are done heat exchange; Frozen water and refrigerant are done heat exchange in evaporimeter 3; Refrigerant and cooling water are done heat exchange in the condenser 2 of ice water host computer afterwards; Then be that cooling water and outdoor air are done heat exchange at last in cooling tower 1.
The electricity usage amount of above-mentioned last one heat exchange procedure " cooling water and outdoor air are engaged in heat exchanging process in cooling tower " is still higher, has the space that can further improve, and the utility model promptly proposes at above-mentioned last one heat exchange procedure.
The utility model content
The technical problems to be solved in the utility model is: a kind of cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically is provided, to improve and to overcome the defective of above-mentioned known technology, reduces the electricity usage amount of central air conditioner system.
Technical solution of the present utility model is: a kind of cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically, wherein this cooling tower comprises the cooling tower main body, hygrometer, water pump that can VFC, a plurality of measuring temp devices and have the controller of calculation function, this cooling tower main body is one or the use in parallel of many groups, to suck the cooling water that the cooling air flows into cooling, described hygrometer is installed in cooling tower, measure the wet-bulb temperature changing value of the cooling air that sucks, described cooling water pump that can VFC is installed in the cooling water runner with the control cooling water flow, and a plurality of measuring temp devices are installed in the import and export of cooling air and cooling water respectively, to measure each variation of temperature value and to be connected with controller, temperature difference when at least one controller is in order to the wet-bulb temperature that calculates the cooling air and cooling water turnover cooling tower in addition, preestablish maximum in its middle controller and allow that the data of the degree of approach of wet-bulb temperature correspondence of operating condition and built-in outer gas are in order to handle the data of aforementioned controller gained, to determine the data of best cooling water flow and cooling air delivery.
Characteristics of the present utility model and advantage are: in order to save the energy resource consumption of cooling tower, the cooling air delivery that heat load changes and adjustment passes in and out cooling tower automatically with ice water host computer is main method, to reach energy-conservation purpose in the past.The utility model is an effective use of energy sources more, and the brand-new cooling tower control system of being carried changes with the heat load of ice water host computer, not only can adjust cooling air delivery automatically, more can adjust cooling water flow, can significantly save the energy that cooling tower uses.The utility model comprise cooling tower main body, hygrometer, can VFC water pump, a plurality of measuring temp device and have the controller of calculation function.Data necessary such as cooling tower maximum are allowed the wet-bulb temperature of opereating specification, cooling tower heat transfer property, outside air and the relational expression of the degree of approach etc., utilize numerical method in addition computing and in be built in controller.During the cooling tower running, measurement by the measuring temp device, and program is sent to controller, in controller, compare real data and precalculated data, try to achieve optimal cooling water flow and cooling air delivery value, control cooling fan in cooling water pump and the cooling tower respectively by controller again, and reach optimal flow.The utility model has overcome the defective of prior art, has proposed brand-new energy savings method, can reduce the electricity usage amount of central air conditioner system, reduces the pressure of spike electricity consumption.
Description of drawings
Fig. 1 is known central air conditioner system figure.
Fig. 2 is condenser of the present utility model and cooling tower start detail drawing.
Fig. 3 is the heat balance diagram of slight distance.
Fig. 4 is system's control Organization Chart.
Fig. 5 be extraneous wet-bulb temperature WB with near the AP graph of a relation.
The drawing reference numeral explanation:
1. cooling tower 11. fans
12. cooler pan 13. tanks
14. the measuring temp device (measure T
G1) 15. measuring temp devices (and measure T
G2)
16. hygrometer 2. condensers
21. the measuring temp device (measure T
L1) 22. measuring temp devices (and measure T
L2)
23. cooling water pump 24. controllers
25. controller 26. controllers
3. evaporimeter 4. indoor fan cooling coils
5. compressor 6. CHPs
7. expansion valve
The specific embodiment
Fig. 2 is the start detail drawing between condenser (Condensor) 2 and the cooling tower (cooling tower) 1.M
LBe cooling water flow, in order to the working fluid in the cooler condenser (refrigerant), the temperature of cooling water thereby rise to T
L1Flow out from condenser.Be transported to the inlet of cooling tower 1 thereupon.Generally by the gravity effect, high temperature T
L1Cooling water from flow through cooler pan 12 in the cooling tower of the inlet of cooling tower, down flow to the tank 13 of cooling tower bottom, for cooling off toward dirty cooling water, general using is installed in the extraction fan 11 of cooling tower top, and the cooling air delivery that extracts extraneous low temperature from the below inlet of cooling tower 1 is M
G, temperature is T
G1, make it toward the upper reaches, to cool off toward dirty cooling water, and connect hygrometer 16 in order to measure the wet-bulb temperature changing value of the cooling air that sucks in cooling tower 1, the higher cooling water of temperature that wherein cooled off absorption of air, when therefore leaving cooling tower 1 up, temperature rises to T
G2, strictly speaking, the cooling air can increase flow because of the aqueous vapor that adds evaporation to some extent, but the general approximate M that looks
GFor necessarily.On the contrary, cooling water is then from T
L1Higher temperature be cooled to T
L2Though flow slightly subtracts because of the evaporation of water effect, generally still can be similar to and look M
LBe definite value.This temperature is T
L2Cooling water enter condenser 2 again, carry out new loop effect.The temperature of the cooling water that Fig. 2 middle controller 24 adjustable settings flow out from cooling tower, and with T
L2Temperature signal send controller 26 to.Controller 25 can calculate and adjust the temperature difference Δ T (T that sets cooling water
L1-T
L2), and send the signal of temperature difference to controller 26.26 of controllers are integrated various signals, and send rotating speed and flow that instruction adjustment is set cooling tower fan 11 and cooling water pump 23.
Owing to the relation of the conservation of energy (energy conservation), from the total amount of heat that cooling water spread out of that the cooling tower top flows into, flow out the below, must and below cooling tower, flow into, the total amount of heat that the cooling air that flow out the top is obtained equates.If with microcosmic, the heat exchange between cooling water and the cooling air can be represented as Fig. 3.Cooling water spreads out of heat between this trace is apart from dx
DQ
L=-M
L* C
L* (Δ T
L) (formula 1)
Δ T in (formula 1)
LQu Jian temperature difference for this reason, C
LFor cooling specific heat of water (specific heat), suppose not change with temperature change, can be considered definite value, negative sign is represented spreading out of of heat in the formula.
Same, the obtainable heat dQ of cooling air
GFor
DQ
G=M
G* (Δ H) (formula 2)
Δ H distinguishes the enthalpy difference (enthalpy difference) of cooling air for this reason in (formula 2), is calculated by following formula
Δ H=H
(TG+dTG)-H
(TG)(formula 3)
H
(TG)And H
(TG+dTG)Be respectively the enthalpy of the air when entering and leaving micro-space, (formula 1) and (formula 2) is so must equate
DQ
G=M
G* (Δ H)=-M
L* C
L* (Δ T
L)=dQ
L(formula 4)
Generally on engineering is used, dQ
GAlso can be similar to and try to achieve by following formula
F in (formula 5) is the coefficient of heat convection (convection heat coefficient), and k determines according to the physical property of cooling liquid that uses and refrigerating gas, the approximate constant of its value.H is the enthalpy of interval nonsaturated air (unsaturated air) for this reason, and H
sInterval for this reason is the enthalpy of cooling water surface temperature (temperature with cooling water is approximate) pairing saturated air (saturated air).H and H
SBe temperature funtion, (H
S-cooling air arround H) the expression heat is flow to by the air on cooling water surface, the interval for this reason heat of dA passes area.
If with micro-distance, extend to whole cooling tower, then following formula is set up.
A is expressed as the total heat biography area of cooler pan in the cooling tower (12) in the formula.(formula 6) can be rewritten into following formula.
Practical Calculation is then used following formula
(H in the formula
S-H) the average enthalpy difference of expression in the dilatation.Δ T is the temperature difference of dilatation, when the value on (formula 8) equal sign the right when being known, can utilize numerical method (numerical method) to try to achieve equal sign
The value on limit.When
Value when being known, then can try to achieve the value of each parameter of equal sign the right.
When cooling tower was sold by general manufacturer, it was 100% o'clock cooling water flow M in heat load that cooling tower can be provided
L, cooling air delivery M
G, rangeability (range) RT, the degree of approach (approach) AP.The temperature upper limit T of cooling water when entering condenser
L2, the temperature upper limit T of cooling water when leaving condenser
L1, the wet-bulb temperature WB of outside air.
The meaning of degree of approach AP is meant the temperature (T when cooling water leaves cooling tower
L2) and the difference of wet-bulb temperature (the wet bulb temperature) WB of cooling air when entering cooling tower, that is
T
L2=WB+AP (formula 9)
The meaning of rangeability RT is meant the temperature difference of cooling water turnover cooling tower, that is
RT=T
L1-T
L2(formula 10)
And the load Q of condenser 2
L, can try to achieve by following formula
Q
L=M
L* C
L* (T
L1-T
L2) (formula 11)
Can get after the replacement
Q
L=M
L* C
L* RT (formula 12)
The total amount of heat Q of cooling air
GThen represent for following formula
Q
G=M
G* (H
TG2-H
TG1)=Q
L(formula 13)
When practical application cooling tower performance is calculated, utilize hygrometer 16 measuring instruments to record the wet-bulb temperature WB and the cooling water inflow M of the cooling air that enters cooling tower
L, and the ratio MLG that sets, try to achieve T more successively
L2And T
L1Substitution (formula 8) can be obtained
Value.By the physical significance that f, A and k had,
Value can be considered a kind of very significant cooling tower coefficient of performance, work as M
L, MLG and WB value keep one regularly, this cooling tower coefficient of performance
Also need keep definite value, utilize this relation then can be by numerical computations inverse T of (that is the change of RT value) when the heat load of condenser 2 changes
L2, T
L1Variation with AP.Learn T
L2And T
L1Variation after, can and adjust cooling water M by numerical computations
LWith MLG ratio, and make T
L2And T
L1Reach optimum state, this adjustment process can effectively reach the purpose of energy savings.Main contents of the present utility model are done in following illustrated embodiment and are specified.
Embodiment 1: with a certain factory is example, and the operand that manufacturer provides is according to following condition;
Cooling water flow M
L=30GPM (30 gallons of per minutes)
Cooling air delivery M
G=25GPM (per minute 25 gallons (=256 pounds))
The mass flow ratio of cooling water and cooling air
MLG(M
L/M
G)＝1.2
Rangeability RT=10
Degree of approach AP=7
The cooling air flows into the wet-bulb temperature WB=83 of cooling tower
Cooling water flow out of the temperature upper limit T of condenser
L2For
T
L2＝WB+AP＝83+7＝90
T
L1＝T
L2+RT＝90+10＝100
This group (T
L2=90 , T
L1=100 ) data are the temperature upper limit of cooling water turnover condenser when WB=83 , that is the maximum that sets is allowed operating condition.
Condenser heat load this moment Q
CCan try to achieve by following formula,
Q
C＝M
L×C
L×(T
L1-T
L2)15000Btu/hr
C
L＝1Btu/lb-
Embodiment 2: when the heat load of condenser reduces, and T
L1And T
L2Variation.
As operating condition M
L, M
GIdentical with WB with example 1, and the heat load of condenser can be learnt the turnover temperature T of cooling water when reducing by the measuring temp device 21,22 of condenser
L1And T
L2Variation.Numerical value after it changes is respectively T
L1=95 , T
L2=88 .
By above-mentioned (formula 11), can calculate heat load Q
C
Q
C＝M
L×C
L×(T
L1-T
L2)10500Btu/hr
Q with example 1
CCompare, be about 70% (=10500/15000), that is descend 30%.Because the operating condition M of this moment
L, M
GIdentical with WB with example 1, therefore
Value also must be identical with example 1,
Be 0.976.Utilize this
Condition, substitution (formula 8) also can be tried to achieve the T of one group of correspondence
L1And T
L2By numerical computations, T as can be known
L1=95.24 , T
L2=88.24 are about T by measuring temp device (21) and (22) gained measuring value
L1=95 , T
L2=88 , both can be similar to and be considered as equating.Following energy-conservation embodiment is a foundation with 70% heat load.
Embodiment 3:
When the heat load of condenser reduces in response to measure.Reduce cooling air delivery M
G, so that cooling water enters the temperature T of condenser
L2From ceiling temperature 90 of 88 rising precedents 1 of example 2, with the conservation of power energy.
By learning in the example 2, the heat load of condenser is reduced to 70% o'clock of example 1, enters the cooling water temperature T of condenser
L2Become 88 , be the conservation of power energy, will cool off the flow M of air this moment
GReduce, the cooling capacity of cooling tower thereby reduction cause the temperature of cooling water to rise.Owing to being limited to 90 on the cooling water temperature that enters condenser, by the control of cooling water temperature measurement tolerance 22, can reach purpose, saved electric power energy at the same time.This power save mode is widely used present the sixth of the twelve Earthly Branches, and the preceding case patent that TaiWan, China patent announcement numbering " 305447 ", name are called " cooling tower that energy can be adjusted variation automatically with load variations " also is to adopt this mode.Can learn by aforesaid numerical computation method; The state of this moment is as follows
T
L1＝97，T
L2＝90，
Cooling air delivery is certain through changing the sixth of the twelve Earthly Branches
Value also change the heat load Q of condenser thereupon
CCan try to achieve by following formula.
Q
C＝M
L×C
L×(T
L1-T
L2)10500Btu/hr
It still is 70% of example 1.
Embodiment 4:
When the heat load of condenser reduces, provided by the utility model in response to measure.Reduce cooling water M simultaneously
LWith cooling air M
GFlow makes the T of the temperature of cooling water turnover condenser from example 2
L1=95 , T
L2=88 ; Rise to as described above the condenser maximum and allow operating condition T
L1=100 , T
L2=90 .
The method reduces cooling water flow M earlier
L, downgrade afterwards and cooling air delivery M
G, more significantly reduce electric power energy than the preceding case patent institute extracting method of example 3, reach more effective energy-saving effect, this mode promptly is main contents of the present utility model.
Learn by example 3, reduce cooling air volume and can make the water temperature of turnover condenser rise to T
L1=97 , T
L2=90 .But the ceiling temperature of condenser is T
L1=100 , T
L2=90 learn T by data
L1Still have the scope of utilizing of 3 (=100 -97 ).Therefore keeping Q
CUnder the condition for 10500Btu/hr, can obtain as cooling water inflow M with aforesaid numerical computation method
L=21GPM, cooling air delivery M
L=18GPM during MLG=1.167, can make T
L1=100 , T
L2=90 reach ceiling temperature, at this moment
Value become 0.960, the heat load Q of condenser
C, can try to achieve by following formula
Q
C＝M
L×C
L×(T
L1-T
L2)＝21×CL×(100-90)10500Btu/hr
Still be 10500Btu/hr as can be known, the result learns the decline cooling water flow, and the decline cooling air delivery, still can maintain the opereating specification of example 1.
Can verify when heat load becomes 70% by result of calculation, cooling water flow be approximately originally (example 1) cooling water flow 70% (=21GPM/30GPM).To be applied to the control method of cooling water flow as follows for conclusion thus;
Temperature T after the heat load of learning condenser from the measuring temp device 21 and 22 of cooling water reduces
L1=95 , T
L2=88 obtain both temperature difference Δ T=7 .Condenser T
L1And T
L2The temperature difference T=10 (=100 -90 ) of the ceiling temperature that both set, both ratio is 0.7 (=7/10).Cooling water flow then became 21GPM (=30GPM * 0.7) from adjusting in the 30GPM of ceiling temperature state decline 30% originally, then adjusted cooling air delivery M again
G, make from the reading of measuring temp device 21 and 22 and be respectively T
L1=100 , T
L2Till=90 .Because cooling water carries required energy much larger than the cooling air, reduce the flow of cooling water, must significantly save the power consumption of water pump 23, therefore the power save mode of case before the power save mode of this case not only is much better than in the example 3, and derive and the checking of surveying through numerical computations, really correct, and truly feasible.Whole control is as Fig. 4.The content that dotted line comprised among the figure can be integrated by programmable logic controller (PLC) when practical application.
Embodiment 5: when the heat load of condenser still is 100% and external environment turns cold, make outside air wet-bulb temperature WB when being lowered into 81 , how adjust the turnover temperature T of cold whole cooling water from 83 (example 1)
L1And T
L2Value.
Because the heat load of condenser still is 100%, cooling water and cooling air delivery still are respectively M
L=30GPM, M
G=25GPM.MLG still is the heat load Q of 1.2 (=30/25) condenser 100%
CBy example 1 is 15000Btu/hr as can be known, so cooling tower
Value still is 0.976, and rangeability RT maintains 10 , and when this moment, extraneous WB value was reduced to 81 , the cooling water outlet and inlet temperature T of utilizing aforesaid numerical computation method to try to achieve to meet this state with above-mentioned condition
L1=98.5 , T
L2=88.5 .This moment degree of approach AP by original (example 1) 7.0 change into 7.47, under condenser 100% heat load.Relation between wet-bulb temperature WB when degree of approach AP and cooling air enter cooling tower, available aforementioned numerical computation method is tried to achieve, and it concerns as Fig. 5.When WB was 81 , AP was about 7.5 .The T of cooling water
L2=WB+AP is an optimum value, so T
L2=81 +7.5 =88.5
This moment is if desire is energy-conservation, as the preceding case mode of example 3, separately with cooling air volume M
GReduce, make MLG become 1.65, can save the electric power energy of cooling tower fan, make T
L1=100 , T
L2=90 ,
Value becomes 0.974.
General System, the energy of frozen water machine work done (mainly by compressor 5) are about 15 times of cooling tower work done (mainly by fan 11) energy.Make T when reducing cooling air delivery
L2Rise to 90 from 88.5 , saved the electric power energy of fan, but the result who follows makes T
L1Rise to 100 from 98.5 , the work done of frozen water machine is increased, consume more multipotency, in general, lose the greater for less, can't reach the effect of saving.So the preceding case of example 3, from setting fixing T
L2From the mode of 90 (these data are provided by manufacturer, are the condition of 83 at fully loaded and extraneous WB), can't reach the effect of saving.
Review mode of the present utility model, can adjust T by the result of Fig. 5
L2Be 88.5 , still be respectively M at cooling water and cooling air delivery
L=30GPM, M
GObtain T under the condition of=25GPM
L1Be 98.5 , because the turnover water temperature of condenser descends, the merit that expression frozen water machine is done reduces, thereby reaches purpose of energy saving.At this moment if attempt to increase the flow of cooling air so that T
L2Temperature be lower than 88.5 , this will be only to increase the energy to use and futile because learnt by Fig. 5, WB adds that AP will be T
L2Minimum.When the heat load when reducing of condenser this moment, then can be adjusted according to example 4 this cases institute extracting method, can save more multipotency source.Therefore when the measuring temp device 14 of cooling air measures wet-bulb temperature (WB) the value decline of learning outside air, enter the cooling water ceiling temperature of condenser according to result's setting of Fig. 5, can reach best user mode, that is reach the most effective energy service condition.
Claims (12)
1. one kind can change and adjust the cooling tower of cooling water flow and cooling air delivery automatically with load, wherein this cooling tower comprises the cooling tower main body, hygrometer, water pump that can VFC, a plurality of measuring temp devices and have the controller of calculation function, it is characterized in that: this cooling tower main body is one or the use in parallel of many groups, to suck the cooling water that the cooling of cooling air flows into, described hygrometer is installed in cooling tower, described cooling water pump that can VFC is installed in the cooling water runner, and a plurality of measuring temp devices are installed in the import and export of cooling air and cooling water respectively, and be connected with controller, the controller that wherein comprises the temperature difference during in order to the wet-bulb temperature that calculates the cooling air and cooling water turnover cooling tower at least wherein preestablishes the data of the degree of approach that maximum is allowed the wet-bulb temperature correspondence of operating condition and built-in outer gas in this controller.
2. as claimed in claim 1ly can change and adjust the cooling tower of cooling water flow and cooling air delivery automatically, it is characterized in that with load, described cooling tower main body comprise can VFC cooling fan, cooler pan and tank.
3. as claimed in claim 2ly can change and adjust the cooling tower of cooling water flow and cooling air delivery automatically with load, it is characterized in that, described cooling fan that can VFC be a number of being controlled its cooling air delivery by controller.
4. as claimed in claim 1ly can change and adjust the cooling tower of cooling water flow and cooling air delivery automatically with load, it is characterized in that, described cooling water pump that can VFC be controlled the number of its cooling water flow by controller.
5. the cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically as claimed in claim 1 is characterized in that this cooling tower includes four temperature and takes into account three controllers.
6. the cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically as claimed in claim 5, it is characterized in that, in described four measuring temp devices two, be installed in the cooling water runner of turnover condenser respectively, water temperature when measuring cooling water turnover condenser respectively, and and controller link.
7. the cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically as claimed in claim 5, it is characterized in that, in described four measuring temp devices two, be installed in the cooling air inlet and the exit of turnover cooling tower respectively, temperature when cooling off air turnover cooling tower, and and controller binding to measure.
8. the cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically as claimed in claim 5, it is characterized in that, first controller in described three controllers includes calculation procedure, receive hygrometer and be installed in the data that the measuring temp device of the cooling air inlet of cooling tower is captured, this first controller and the binding of another second controller.
9. the cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically as claimed in claim 8, it is characterized in that the 3rd controller in described three controllers links with two measuring temp devices of the cooling water runner that is installed in the turnover condenser.
10. the cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically as claimed in claim 8, it is characterized in that, be set with maximum in second controller in described three controllers and allow operating condition, and link with the first and the 3rd controller, and its acquisition is according to the outside air wet-bulb temperature that measures and the out temperature difference data of cooling water, and allow that with maximum operating condition comparison relatively determines best cooling water flow and cooling air delivery mutually, and carry the empty fan of cooling that signal to cooling water pump that can VFC and can VFC.
11. the cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically as claimed in claim 1 is characterized in that, is built in the controller in the data of the corresponding degree of approach of the wet-bulb temperature of outside air.
12. the cooling tower that can adjust cooling water flow and cooling air delivery with the load change automatically as claimed in claim 1 is characterized in that controller is controlled the cooling tower that uses many homotypes in parallel simultaneously.
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|---|---|---|---|
| CNU2006201329394U CN201003930Y (en) | 2006-08-31 | 2006-08-31 | A cooling tower |
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|---|---|---|---|
| CNU2006201329394U CN201003930Y (en) | 2006-08-31 | 2006-08-31 | A cooling tower |
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2006
- 2006-08-31 CN CNU2006201329394U patent/CN201003930Y/en not_active Expired - Lifetime
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| CN110057234A (en) * | 2019-04-22 | 2019-07-26 | 国家能源投资集团有限责任公司 | Temperature measuring equipment, cooling system and temp measuring method |
| CN110793380A (en) * | 2019-11-19 | 2020-02-14 | 上海颢世环境能源科技有限公司 | Energy management method for cooling water circulation system |
| CN110793379A (en) * | 2019-11-19 | 2020-02-14 | 上海颢世环境能源科技有限公司 | Circulating water management equipment, circulating system and management method based on cooling tower |
| CN110793380B (en) * | 2019-11-19 | 2022-01-11 | 上海颢世环境能源科技有限公司 | Energy management method for cooling water circulation system |
| CN110793379B (en) * | 2019-11-19 | 2022-01-11 | 上海颢世环境能源科技有限公司 | Circulating water management equipment, circulating system and management method based on cooling tower |
| CN111023643A (en) * | 2019-12-31 | 2020-04-17 | 巨石集团有限公司 | Energy-saving control method of refrigerating system |
| CN111473482A (en) * | 2020-04-08 | 2020-07-31 | 贵州汇通华城股份有限公司 | Cooling circulation control device and method for water-cooled central air conditioner |
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