CN103198199B - Three dimensional heating analysis method of wet-type counter-flow type natural draft cooling tower - Google Patents
Three dimensional heating analysis method of wet-type counter-flow type natural draft cooling tower Download PDFInfo
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- CN103198199B CN103198199B CN201210003195.6A CN201210003195A CN103198199B CN 103198199 B CN103198199 B CN 103198199B CN 201210003195 A CN201210003195 A CN 201210003195A CN 103198199 B CN103198199 B CN 103198199B
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- 238000001816 cooling Methods 0.000 title claims abstract description 74
- 238000004458 analytical method Methods 0.000 title claims abstract description 9
- 238000010438 heat treatment Methods 0.000 title claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000000498 cooling water Substances 0.000 claims description 24
- 238000012856 packing Methods 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 239000000945 filler Substances 0.000 claims description 18
- 239000002826 coolant Substances 0.000 claims description 15
- 230000002411 adverse Effects 0.000 claims description 13
- 238000011156 evaluation Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 7
- 238000012546 transfer Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 2
- 239000007921 spray Substances 0.000 description 7
- 239000000284 extract Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000004141 dimensional analysis Methods 0.000 description 4
- 238000009795 derivation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012932 thermodynamic analysis Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Abstract
A three dimensional heating analysis method of a wet-type counter-flow type natural draft cooling tower comprises the steps as follows: (1) arranging a first spraying source on the upper portion of a spraying zone of the cooling tower; (2) establishing a cooling tower spraying zone resistance model; (3) establishing a cooling tower material filling area heat transmission mass transfer and resisting force model; (4) arranging a second spraying source on the lower portion of the spraying zone of the cooling tower; and (5) establishing a cooling tower rainfall province heat transmission mass transfer and resisting force model. The three dimensional heating calculation method of the wet-type counter-flow type natural draft cooling tower better meets actual conditions, calculation results are more precise, and the method provides important reference to the heat power design and research of the wet-type counter-flow type natural draft cooling tower.
Description
Technical field
The present invention relates to a kind of wet type adverse current cooling stack three-dimensional heating power analysis method, natural for wet type adverse current
Aerating and cooling tower thermodynamic analysises.
Background technology
With the increasingly reduction of coal oil resource, and pay attention to day by day of the country to environmental protection cause, electricity power enterprise is newly-built
Project is mostly using the large sized unit and nuclear power generating sets of more high-efficiency low-pollution.Under especially the development of nuclear power generating sets is even more
The main force of stage China's energy development, according to《National nuclear power developing special topic planning (2005-2020)》And its repairing later
Version is ordered, China expects the year two thousand twenty nuclear power generating sets total capacity and is up to 80,000,000 kilowatts.Nuclear power generating sets cooling tower configuration is adopted "
The tower of one machine one " configuration compared with " tower of a machine two " or " a machine multitower is " in the aspects such as economy, safety more advantage.But it is this to match somebody with somebody
The wet type adverse current cooling stack scale put in mode will be far beyond the current specifications scope of application and built wet type
Adverse current cooling stack scale, its flow field in tower nonunf ormity will become apparent from, and its thermodynamic computing should be using three-dimensional
Thermal calculation method.But because in cooling tower there is the mutual conversion of drop, liquid film in cooling water in packing area.Realize area's endogenous dampness
The pure three-dimensional computations of heat and mass and resistance between air and cooling water are extremely difficult.
Above-mentioned true explanation, is realized at this stage cooling tower filler area heat and mass and resistance by pure theoretical derivation and formula
It is impossible that power three dimensional analysis are calculated.It is mutual that its main cause is that cooling tower filler area cooling water has drop, liquid film
Conversion.This conversion does not also have to the heat and mass in packing area between cooling water and humid air and the impact for interacting at present
Draw rationally accurate relative theory analysis, it is impossible to carry out three dimensional analysis calculating with corresponding theoretical derivation and formula.Grind
Study carefully and show, packing area is the main region that heat and mass and resistance occur in cooling tower, its caloic exchange capacity accounts for whole cooling tower
The 60～70% of caloic exchange capacity.Its humid air pressure drop for producing also accounts for whole cooling tower humid air pressure drop 30% -40%,
In cooling tower thermal performance analysis, the thermodynamic analysises in the region are calculated and play extremely crucial impact.
A kind of wet type adverse current cooling stack three-dimensional thermal calculation method is a kind of test data and theory analysis phase
With reference to cooling tower three-dimensional thermal calculation method, based on filler field data, complete in cooling tower the heat and mass of packing area and
Resistance three-dimensional thermodynamic computing, and then complete whole cooling tower three-dimensional thermodynamic computing.
The content of the invention
The technical problem to be solved：Solution cooling tower filler area cooling water has drop, liquid film conversion to be caused
Purely calculated by theoretical derivation and formula and be difficult to complete area's cooling water and humid air heat and mass and resistance three dimensional analysis
Problem, completes cooling tower three-dimensional heating power analytical calculation, is that cooling tower thermal-design and research provide foundation.
In order to solve the above problems, the present invention provides a kind of for wet type adverse current cooling stack three-dimensional thermodynamic analysises
Method, comprise the following steps：
(1) the first injection source is set on cooling tower spraying zone top；
(2) cooling tower spraying zone resistance model is set up；
(3) cooling tower filler area heat and mass and resistance model are set up；
(4) the second injection source is set in cooling tower filler area bottom；
(5) cooling tower rain belt heat and mass and resistance model are set up.
Described in cooling tower spraying zone top the first injection source of setting is entered tower water temperature, enters tower according to known cooling tower
The water yield and its distribution, with reference to the injection surface grids distribution situation on spraying zone top, arrange the first injection corresponding with practical situation
Source.
Described cooling tower spraying zone resistance model of setting up is to write the relative resistance UDF programs of spraying zone, according to first
Entering tower water temperature, entering the tower water yield and its distribution for injection source setting, sets up spraying zone resistance model, is calculated by model and determines filler
Area top coolant water temperature, cooling water inflow and its distribution.
It is described set up cooling tower filler area heat and mass and resistance model be write cooling tower filler area heat and mass and
Drag evaluation UDF programs, extract packing area top and calculate coolant water temperature, cooling water inflow and its distribution, set up cooling tower filler area
Heat and mass and resistance model, are calculated by model and determine packing area bottom coolant water temperature, cooling water inflow and its distribution.
Described refers to that the packing area bottom that extraction is calculated is cold in cooling tower filler area bottom the second injection source of setting
But water temperature, cooling water inflow and its distribution, with reference to the injection surface grids distribution situation of packing area bottom, is arranged and the corresponding second spray
Penetrate source.
Described set up cooling tower rain belt heat and mass and resistance model be：Write cooling tower rain belt heat and mass and resistance
UDF programs are calculated, entering tower water temperature, entering the tower water yield and its distribution according to the setting of the second injection source sets up the heat transfer of cooling tower rain belt
Mass transfer and resistance model, are calculated by model and determine tower cooler water temperature, cooling water inflow and its distribution situation.
The invention has the beneficial effects as follows：The present invention is a kind of comprehensive and accurate Three Dimensional Thermal of wet type adverse current cooling stack
Power analysis method, is that wet type adverse current cooling stack thermal-design and research provide foundation.
Description of the drawings
Fig. 1 is wet type adverse current cooling stack schematic diagram.
Fig. 2 is wet type adverse current cooling stack three-dimensional calculation method frame diagram.
Specific embodiment
Referring to Fig. 1, Fig. 2, a kind of wet type adverse current cooling stack three dimensional analysis method can be divided into five steps to be carried out, respectively
It is：
The first step：Determine that cooling tower enters tower water temperature and enters the tower water yield, the first injection source is set.Enter tower water temperature and enter the tower water yield
It is known, with reference to the spray face stress and strain model situation and cooling tower spray density distribution situation on cooling tower spraying zone top,
First spray face can be arranged using DPM models and UDF programs.
Second step：Extract packing area top coolant water temperature and cooling water inflow.Establishment packing area UDF programs, extract the first step
Middle DPM models and the calculated packing area top coolant water temperature of UDF programs and cooling water inflow and its distribution situation.
3rd step：Carry out packing area heat and mass and drag evaluation.Establishment packing area heat and mass and drag evaluation UDF journeys
Sequence.Using the packing area top coolant water temperature and cooling water inflow that extract, with reference to filler test data and its in calculating cooling tower
Deployment scenarios, calculate packing area bottom coolant water temperature and cooling water inflow.
4th step：Packing area bottom coolant water temperature and cooling water inflow are extracted, the second injection source is set.Establishment rain belt UDF journeys
Sequence, extracts the calculated packing area bottom coolant water temperature of UDF programs and cooling water inflow and its distribution situation in the 3rd step, with reference to
The spray face stress and strain model situation and cooling tower spray density distribution situation on cooling tower rain belt top, can using DPM models and
UDF programs arrange the second spray face.
5th step：Rain belt heat and mass and drag evaluation are carried out, cooling tower outlet water temperature is obtained.Establishment rain belt heat and mass
With drag evaluation UDF programs.Using the packing area bottom coolant water temperature and cooling water inflow that extract, rain belt bottom coolant water temperature is calculated
And cooling water inflow, it is final to obtain cooling tower outlet water temperature.
Claims (1)
1. a kind of wet type adverse current cooling stack three-dimensional heating power analysis method, it is characterised in that be made up of following steps：
（1）On cooling tower spraying zone top, the first injection source is set：It is described that on cooling tower spraying zone top, the first injection source is set
It is to enter tower water temperature, enter the tower water yield and its distribution according to known cooling tower, with reference to the injection surface grids on spraying zone top feelings is distributed
Condition, arranges the first injection source corresponding with practical situation；
（2）Set up cooling tower spraying zone resistance model：Described cooling tower spraying zone resistance model of setting up is to write spraying zone phase
To resistance UDF programs, according to the first injection source setting entering tower water temperature, entering the tower water yield and its distribution, set up spraying zone resistance
Model, is calculated by model and determines packing area top coolant water temperature, cooling water inflow and its distribution；
（3）Set up cooling tower filler area heat and mass and resistance model：Described sets up cooling tower filler area heat and mass and resistance
Power model is to write cooling tower filler area heat and mass and drag evaluation UDF programs, extraction packing area top calculating coolant water temperature,
Cooling water inflow and its distribution, set up cooling tower filler area heat and mass and resistance model, are calculated by model and are determined under packing area
Portion's coolant water temperature, cooling water inflow and its distribution；
（4）In cooling tower filler area bottom, the second injection source is set：Described arranges the second injection in cooling tower filler area bottom
Source refers to packing area bottom coolant water temperature, cooling water inflow and its distribution that extraction is calculated, with reference to the injection of packing area bottom
Surface grids distribution situation, is arranged and corresponding second injection source；
（5）Set up cooling tower rain belt heat and mass and resistance model：Described sets up cooling tower rain belt heat and mass and resistance mould
Type is：Cooling tower rain belt heat and mass and drag evaluation UDF programs are write, entering tower water temperature, entering according to the setting of the second injection source
The tower water yield and its distribution, set up cooling tower rain belt heat and mass and resistance model, by model calculate determine tower cooler water temperature,
Cooling water inflow and its distribution situation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210003195.6A CN103198199B (en) | 2012-01-08 | 2012-01-08 | Three dimensional heating analysis method of wet-type counter-flow type natural draft cooling tower |
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| CN201210003195.6A CN103198199B (en) | 2012-01-08 | 2012-01-08 | Three dimensional heating analysis method of wet-type counter-flow type natural draft cooling tower |
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| CN103198199A CN103198199A (en) | 2013-07-10 |
| CN103198199B true CN103198199B (en) | 2017-05-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104239724B (en) * | 2014-09-19 | 2017-04-12 | 国家电网公司 | Online monitoring and assessment method for heat exchange efficiency of water-cooling system of converter valve |
| CN105806143B (en) * | 2016-03-16 | 2018-10-23 | 安徽皖苏电力运检科技有限公司 | A kind of thermal power plant's cooling column heat-exchanger rig three-dimensional optimized method for arranging |
| CN111076569A (en) * | 2018-10-19 | 2020-04-28 | 济南蓝辰能源技术有限公司 | Co2Closed cooling tower checking method for gas cooling |
| CN110186291B (en) * | 2019-05-27 | 2020-08-14 | 山东科美自动化设备科技有限公司 | Check calculation method for mixed flow type closed cooling tower |
| CN110096845B (en) * | 2019-05-27 | 2023-09-29 | 山东科美自动化设备科技有限公司 | Design calculation method of mixed-flow closed cooling tower |
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| AU2005202183B1 (en) * | 2004-05-22 | 2005-09-01 | Sigma Energy Solutions Pty Limited | Improved fan-assisted wet cooling tower and method of reducing liquid loss |
| US8527102B2 (en) * | 2010-06-30 | 2013-09-03 | Rockwell Automation Technologies, Inc. | Controlling the cooling of fermenters of a biofuel production plant |
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Non-Patent Citations (5)
| Title |
|---|
| CFD prediction of cooling tower drift;Robert N. Meroney;《Journal of Wind Engineering and Industrial Aerodynamics》;20060310;第94卷(第6期);第463-490页 * |
| CFD simulation of wet cooling towers;Rafat Al-Waked et al.;《Applied Thermal Engineering》;20050824;第26卷;第382-395页 * |
| 自然通风湿式冷却塔传热传质的三维数值分析;赵元宾等;《山东大学学报（工学版）》;20081016;第38卷(第5期);第36－41页 * |
| 自然通风湿式冷却塔热力特性数值模拟;周兰欣等;《水利学报》;20090215;第40卷(第2期);第208-213页 * |
| 逆流式冷却塔填料及淋水分布的数值优化设计;黄东涛等;《应用力学学报》;20000330;第17卷(第1期);第102-109页 * |
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Address after: The 410007 West Hunan province Changsha Yuhua District No. 471 Applicant after: HUNAN ELECTRIC POWER DESIGN INSTITUTE OF CHINA ENERGY EGINEERING Corp.,Ltd. Address before: 410000 Changsha West Road, Hunan, No. 471 Applicant before: Hunan Electric Power Design Institute |
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Inventor after: Tang Lei Inventor after: Yi Chao Inventor after: Zhang Li Inventor after: Liu Zili Inventor after: Li Yan Inventor after: Xie Rong Inventor after: Zhang Zhijun Inventor after: Yang Junqing Inventor before: Liu Zhibin Inventor before: Zhang Li Inventor before: Zhang Jidong Inventor before: Other inventor requests not to publish the name |
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