CN111336858A - Method for optimizing water distribution of inner and outer regions of large-scale natural ventilation wet cooling tower - Google Patents
Method for optimizing water distribution of inner and outer regions of large-scale natural ventilation wet cooling tower Download PDFInfo
- Publication number
- CN111336858A CN111336858A CN202010272144.8A CN202010272144A CN111336858A CN 111336858 A CN111336858 A CN 111336858A CN 202010272144 A CN202010272144 A CN 202010272144A CN 111336858 A CN111336858 A CN 111336858A
- Authority
- CN
- China
- Prior art keywords
- water distribution
- area
- water
- cooling tower
- spray head
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
-
- 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
- F28F25/02—Component parts of trickle coolers for distributing, circulating, and accumulating liquid
- F28F25/06—Spray nozzles or spray pipes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a method for optimizing water distribution in an internal and external subarea of a large-scale natural ventilation wet cooling tower, belongs to the technical field of cooling towers, and particularly relates to a method for optimizing water distribution in the technical field of cooling towers. The method provides an implementation method aiming at a subarea water distribution optimization scheme of different water spraying areas and water spraying densities of an inner area and an outer area obtained by water distribution optimization of an ultra-large natural ventilation wet cooling tower, and comprises the following steps: firstly, setting water distribution quantity, water spraying area and corresponding internal and external area proportion, calculating and configuring the pipe diameter of a water distribution pipe and selecting the type of a spray head according to the water distribution quantity, then calculating the flow velocity of each section of the water distribution pipe on the assumption of the flow of the spray head, calculating the actual flow of each spray head by using circulation iteration, calculating the water distribution uniformity of each internal and external area according to the actual flow, and finally checking the water distribution uniformity, the water distribution quantity and the water pressure of the spray head of each internal and external area to determine the water distribution arrangement mode of the cooling tower. The method can meet the aim of realizing water distribution of the inner area and the outer area of the cooling tower, and can ensure the uniformity of water distribution of the inner area and the outer area.
Description
Technical Field
The invention belongs to the technical field of cooling towers, and particularly relates to a method for optimizing water distribution of an internal area and an external area of a large-scale natural draft wet cooling tower.
Background
Energy conservation and emission reduction are basic national policies in China, a cooling tower is used as an important part with higher energy consumption in a power plant, and reduction of energy consumption of the cooling tower is an important measure for reducing GDP production value energy consumption and saving energy. The water spraying system is an important part of the cooling tower, and the improvement of the cooling efficiency of the water spraying system is particularly important for reducing the energy consumption of the cooling tower. The general ultra-large natural draft wet cooling tower is arranged according to the uniform water distribution of the whole tower, and although the purpose of cooling the water distribution can be achieved, certain waste can be caused to energy sources. In the patent 'cooling tower water distribution optimization method based on cooling latent power', resistance and heat value exchange in a rain area of a cooling tower are not negligible, so that the air flow rate and the enthalpy value of the air flow rate along the radial direction of the cooling tower are greatly changed, and a water distribution optimization method based on rising air cooling capacity, namely cooling latent power, and a corresponding water distribution optimization scheme are provided. The invention provides a method for realizing a water distribution optimization scheme, namely a method for realizing the water distribution optimization by optimizing the pipe diameter of a water distribution pipe, arranging the water distribution pipe, selecting a spray head and the like, aiming at the water distribution optimization scheme of a cooling tower water distribution optimization method based on cooling latent power.
Disclosure of Invention
In order to solve the problems, the invention aims to provide an optimization method for realizing water distribution in inner and outer areas of a large-scale natural draft wet cooling tower.
In order to achieve the purpose, the technical scheme of the invention is as follows:
s1: setting the total water distribution amount of water distribution;
s2: setting the water distribution ratio and the water spraying area ratio of the inner zone and the outer zone;
s3: setting specific specification and arrangement mode of the water distribution pipes of the inner zone and the outer zone, and specification parameters and arrangement mode of the spray heads;
s4: assuming the quantity of water q of the spray headi(ii) a Assuming that the initial value is assumed according to the average value of the water distribution quantity divided by the number of the spray heads;
s5: calculating the flow rate of each section of the water distribution pipe according to each parameter;
s6: computing spray through loop iterationWater quantity q of heado(ii) a By using the assumed value of the flow of the spray head and the flow velocity of each section of the water distribution pipe, the on-way resistance and the flow dividing resistance of the spray head are calculated
Circularly and iteratively outputting the actual water quantity of the spray head;
s7: comparing the calculated values qoAnd an assumed value qiIf q isi=qoOr the difference is within the allowable range, the next step is carried out, otherwise, the step returns to S4, and the calculated value is used as the assumed value for recalculation;
s8: checking the water distribution amount of the inner area and the outer area, and calculating the total water distribution amount of each area inside and outside through the water amount of the spray head and the arrangement mode of the water distribution pipe and the spray head;
s9: comparing the calculated water amount with the designed water distribution ratio, if the calculated water amount is equal to the design value or the difference value is within the allowable range, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads;
s10: calculating respective uniform distribution coefficients of the inner region and the outer region
；
S11: judging the uniform distribution coefficients of the inner area and the outer area, if the uniform distribution coefficients are less than 10%, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads;
s12: integrally calculating the nozzle pressure heads of the inner area and the outer area, and simultaneously comparing whether the nozzle pressure heads of the inner area and the outer area are equal or the difference value is within an allowable range, if so, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads of the inner area and the outer area;
s13: and outputting a design result.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading the following detailed description of non-limiting implementations with reference to the accompanying drawings.
FIG. 1 is an operation flow of a technical scheme of the method for optimizing water distribution in inner and outer zones of a large-scale natural draft wet cooling tower according to the present invention;
the specific implementation mode is as follows:
s1: setting the total water distribution amount of water distribution;
s2: setting the water distribution ratio and the water spraying area ratio of the inner zone and the outer zone;
s3: setting specific specification and arrangement mode of the water distribution pipes of the inner zone and the outer zone, and specification parameters and arrangement mode of the spray heads;
s4: assuming the quantity of water q of the spray headi(ii) a Assuming that the initial value is assumed according to the average value of the water distribution quantity divided by the number of the spray heads;
s5: calculating the flow rate of each section of the water distribution pipe according to each parameter;
s6: calculating the water quantity q of the spray head by loop iterationo(ii) a By using the assumed value of the flow of the spray head and the flow velocity of each section of the water distribution pipe, the on-way resistance and the flow dividing resistance of the spray head are calculated
Circularly and iteratively outputting the actual water quantity of the spray head;
s7: comparing the calculated values qoAnd an assumed value qiIf q isi=qoOr the difference is within the allowable range, the next step is carried out, otherwise, the step returns to S4, and the calculated value is used as the assumed value for recalculation;
s8: checking the water distribution amount of the inner area and the outer area, and calculating the total water distribution amount of each area inside and outside through the water amount of the spray head and the arrangement mode of the water distribution pipe and the spray head;
s9: comparing the calculated water amount with the designed water distribution ratio, if the calculated water amount is equal to the design value or the difference value is within the allowable range, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads;
s10: calculating respective uniform distribution coefficients of the inner region and the outer region
；
S11: judging the uniform distribution coefficients of the inner area and the outer area, if the uniform distribution coefficients are less than 10%, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads;
s12: integrally calculating the nozzle pressure heads of the inner area and the outer area, and simultaneously comparing whether the nozzle pressure heads of the inner area and the outer area are equal or the difference value is within an allowable range, if so, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads of the inner area and the outer area;
s13: and outputting a design result.
Example 1. a Natural draft Wet Cooling Tower with a Total Water distribution of 21.01m3S, total water spray area 10292m2。
Patent' cooling tower water distribution optimization method based on air potential heat absorption capacity
The method is optimized to obtain: the water distribution ratio of the inner area and the outer area is 0.31: 0.69, water spraying surface integral proportion of 0.35: 0.65.
designing an inner zone water distribution pipeline arrangement: the number of the water distribution pipes is 30, the diameter of each water distribution pipe is 355mm, 315mm, 250mm, 200mm and 160mm, the number of the spray heads is 4, 6, 5 and 6, the diameter of the spray head is 26mm, the distance between the spray heads is 1.115m, and the distance between the water distribution pipes is 1 m.
Designing the arrangement of an outer water distribution pipeline: the nozzle is divided into B1, B2, C1 and C2 areas according to the diameter of the nozzle, the B1 area is the same as the C1 area, the B2 area is the same as the C2 area, and the specific arrangement is as follows: the number of the water distribution pipes is 27, the diameters of the water distribution pipes are 400mm, 355mm, 315mm, 250mm, 200mm and 160mm, the number of the spray heads is 5, 11, 7, 5 and 7, the diameters of the spray heads are 26mm in B1 and C1 areas, 28mm in B2 and C2 areas, the lengths of the water distribution pipes are gradually shortened from the part close to the inner area to the edge of the tower, the diameter of the last water distribution pipe is 160mm, the number of the spray heads is 7, the diameter of the spray heads is 28mm, the distance between the water spray pipes is 1m, and the distance between the spray heads.
According to the design water distribution amount, assuming the initial value of the flow rate of the spray heads (the water distribution amount is divided by the number of the spray heads), calculating the final actual flow rate of each spray head through loop iteration, checking the water distribution amount of the inner area and the outer area according to the calculated value, and calculating the water distribution amount of the inner area to be 6.5052m3S, design value 6.5131m3S, difference-0.0079 m3S, -0.12%; the outer zone calculates the water distribution amount 14.4852m3S, design value 14.4969m3(s) difference-0.0117, -0.08%; are within acceptable tolerances.
Calculating the uniform distribution coefficient by a formula:
in the formulaσ-water distribution system equipartition coefficient;
q 0 average water quantity of spray head, m3/s；
n-total number of jets, number;
q j quantity of water of jth nozzle, m3/s。
The inner zone equipartition coefficient is 1.53%, the outer zone equipartition coefficient is 7.87%, both are less than 10%.
And calculating the pressure heads of the inner area and the outer area according to the calculated values, wherein the pressure head of the inner area nozzle is 0.906m, the pressure head of the outer area nozzle is 0.911m, and the difference is 0.005 m.
The final water distribution scheme obtained through the calculation can realize water distribution of the inner and outer regions of the natural ventilation wet cooling tower, and simultaneously meet the uniformity of water distribution of the inner and outer regions. And the cooling efficiency of the cooling tower is effectively improved, so that the energy consumption is reduced.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (5)
1. A method for realizing water distribution optimization of inner and outer subareas of a large-scale natural draft wet cooling tower is characterized by comprising the following steps:
s1: setting the total water distribution amount of water distribution;
s2: setting the water distribution ratio and the water spraying area ratio of the inner zone and the outer zone;
s3: setting specific specification and arrangement mode of the water distribution pipes of the inner zone and the outer zone, and specification parameters and arrangement mode of the spray heads;
s4: assuming the quantity of water q of the spray headi(ii) a Assuming that the initial value is assumed according to the average value of the water distribution quantity divided by the number of the spray heads;
s5: calculating the flow rate of each section of the water distribution pipe according to each parameter;
s6: calculating the water quantity q of the spray head by loop iterationo(ii) a By using the assumed value of the flow of the spray head and the flow velocity of each section of the water distribution pipe, the on-way resistance and the flow dividing resistance of the spray head are calculated
Circularly and iteratively outputting the actual water quantity of the spray head;
s7: comparing the calculated values qoAnd an assumed value qiIf q isi=qoOr the difference is within the allowable range, the next step is carried out, otherwise, the step returns to S4, and the calculated value is used as the assumed value for recalculation;
s8: checking the water distribution amount of the inner area and the outer area, and calculating the total water distribution amount of each area inside and outside through the water amount of the spray head and the arrangement mode of the water distribution pipe and the spray head;
s9: comparing the calculated water amount with the designed water distribution ratio, if the calculated water amount is equal to the design value or the difference value is within the allowable range, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads;
s10: calculating respective uniform distribution coefficients of the inner region and the outer region
；
S11: judging the uniform distribution coefficients of the inner area and the outer area, if the uniform distribution coefficients are less than 10%, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads;
s12: integrally calculating the nozzle pressure heads of the inner area and the outer area, and simultaneously comparing whether the nozzle pressure heads of the inner area and the outer area are equal or the difference value is within an allowable range, if so, performing the next step, otherwise, returning to S3 to rearrange the water distribution pipes and the spray heads of the inner area and the outer area;
s13: and outputting a design result.
2. The method for optimizing water distribution in the internal and external regions of the large-scale natural draft wet cooling tower according to claim 1, wherein the method comprises the following steps: in the steps S2-S12, the ratio of the water distribution amount to the water spraying area in each area inside and outside is set, the water distribution mode in each area inside and outside is designed, the flow of each spray head is calculated, and the water distribution amount in each area inside and outside is checked, so that the cooling tower is ensured to be a water distribution mode of unequal water distribution in the inner area and the outer area.
3. The method for optimizing water distribution in the internal and external regions of the large-scale natural draft wet cooling tower according to claim 1, wherein the method comprises the following steps: in the steps S2-S12, the calculation and judgment of the uniform distribution coefficient and the comparison of the pressure heads of the nozzles in the inner area and the outer area ensure the uniformity of water distribution in each area.
4. The method for optimizing water distribution in the internal and external regions of the large-scale natural draft wet cooling tower according to claim 1, wherein the method comprises the following steps: the purpose of water distribution in the inner area and the outer area of the cooling tower can be realized, and the uniformity of water distribution in each area can be met.
5. The method for optimizing water distribution in the internal and external regions of the large-scale natural draft wet cooling tower according to claim 1, wherein the method comprises the following steps: the water pressure of the corresponding nozzles of the inner area and the outer area is equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010272144.8A CN111336858B (en) | 2020-04-09 | 2020-04-09 | Method for optimizing water distribution of inner and outer regions of large-scale natural ventilation wet cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010272144.8A CN111336858B (en) | 2020-04-09 | 2020-04-09 | Method for optimizing water distribution of inner and outer regions of large-scale natural ventilation wet cooling tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111336858A true CN111336858A (en) | 2020-06-26 |
| CN111336858B CN111336858B (en) | 2021-08-20 |
Family
ID=71180668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010272144.8A Active CN111336858B (en) | 2020-04-09 | 2020-04-09 | Method for optimizing water distribution of inner and outer regions of large-scale natural ventilation wet cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111336858B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403700A (en) * | 2016-09-09 | 2017-02-15 | 河海大学常州校区 | Cooling tower real-time dynamic water distribution system and method based on non-uniform spraying device |
| US20170138650A1 (en) * | 2015-11-17 | 2017-05-18 | Rex A. Eiserer | Evaporative Cooler |
| CN107273597A (en) * | 2017-06-09 | 2017-10-20 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of cooling stack water distribution system design method |
| CN206905606U (en) * | 2017-04-19 | 2018-01-19 | 华电电力科学研究院 | A kind of non-homogeneous subregion water distribution system and the wet cooling tower for installing the system |
| CN110132026A (en) * | 2019-05-16 | 2019-08-16 | 济南蓝辰能源技术有限公司 | A kind of gravity-flow ventilation high position that rushton turbine catchments receipts water cooling tower |
| CN110686527A (en) * | 2019-09-30 | 2020-01-14 | 济南蓝辰能源技术有限公司 | Cooling tower water distribution optimization method based on cooling latent power |
-
2020
- 2020-04-09 CN CN202010272144.8A patent/CN111336858B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170138650A1 (en) * | 2015-11-17 | 2017-05-18 | Rex A. Eiserer | Evaporative Cooler |
| CN106403700A (en) * | 2016-09-09 | 2017-02-15 | 河海大学常州校区 | Cooling tower real-time dynamic water distribution system and method based on non-uniform spraying device |
| CN206905606U (en) * | 2017-04-19 | 2018-01-19 | 华电电力科学研究院 | A kind of non-homogeneous subregion water distribution system and the wet cooling tower for installing the system |
| CN107273597A (en) * | 2017-06-09 | 2017-10-20 | 中国电力工程顾问集团西南电力设计院有限公司 | A kind of cooling stack water distribution system design method |
| CN110132026A (en) * | 2019-05-16 | 2019-08-16 | 济南蓝辰能源技术有限公司 | A kind of gravity-flow ventilation high position that rushton turbine catchments receipts water cooling tower |
| CN110686527A (en) * | 2019-09-30 | 2020-01-14 | 济南蓝辰能源技术有限公司 | Cooling tower water distribution optimization method based on cooling latent power |
Non-Patent Citations (1)
| Title |
|---|
| 丁伟: "冷却塔管式配水系统配水计算新方法", 《中国给水排水》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111336858B (en) | 2021-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105806143B (en) | A kind of thermal power plant's cooling column heat-exchanger rig three-dimensional optimized method for arranging | |
| CN108846224B (en) | Supersonic flow channel design method and device | |
| CN110110416B (en) | Distributed energy source cold network cold supply optimization method based on graph theory | |
| CN104504455B (en) | A kind of lower GROUP OF HYDROPOWER STATIONS Long-term Optimal Dispatch method of step accumulation of energy control | |
| CN104089497A (en) | Heat exchange device of cooling tower | |
| CN110686527B (en) | Cooling tower water distribution optimization method based on cooling latent power | |
| CN116108605B (en) | Optimization design method of limited space air duct system considering total life cycle cost | |
| CN110686552B (en) | Cooling tower filler arrangement optimization method based on cooling latent power | |
| CN111336858B (en) | Method for optimizing water distribution of inner and outer regions of large-scale natural ventilation wet cooling tower | |
| CN202973950U (en) | Low-temperature cooling tower | |
| CN111861137A (en) | Parallel multi-target scheduling method for cascade reservoir groups | |
| CN110796295B (en) | Energy Internet air network transmission optimization method | |
| CN102997708A (en) | Low-temperature cooling tower | |
| CN103528155A (en) | Cooling system | |
| CN105160062B (en) | A kind of same journey hydraulic pipeline check method | |
| CN104596182A (en) | Low-energy-consumption circulating water cooling system and method | |
| CN109579567A (en) | Adaptive resistance fluoroplastics condensate device and design method | |
| CN104016350A (en) | Polycrystalline silicon reduction furnace chassis and tail gas cooling system and method thereof | |
| JP6581350B2 (en) | Distributed heat source plant operation planning device and distributed heat source plant operation planning method | |
| CN105202518B (en) | A kind of station boiler bootstrap system | |
| CN203964702U (en) | The heat-exchanger rig of cooling tower | |
| CN204987900U (en) | Heat -exchanging unit | |
| CN204757213U (en) | Evaporation cooling and absorption heat pump unite air conditioning system suitable for power plant | |
| CN204555734U (en) | Cooling tower | |
| CN204555495U (en) | A kind of low energy consumption circulating water cooling 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 |
Address after: Room 1607, building 4, union Fortune Plaza, qiaomeng yuan, no.2177 Tianchen Road, high tech Zone, Jinan City, Shandong Province Applicant after: JINAN LANCHEN ENERGY TECHNOLOGY Co.,Ltd. Address before: 503, block a, industrial technology cooperation center, No. 777, Shunfeng Road, high tech Zone, Jinan City, Shandong Province Applicant before: JINAN LANCHEN ENERGY TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |