CN103198199A - Three dimensional heating calculation method of wet-type counter-flow type natural draft cooling tower - Google Patents
Three dimensional heating calculation method of wet-type counter-flow type natural draft cooling tower Download PDFInfo
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- CN103198199A CN103198199A CN2012100031956A CN201210003195A CN103198199A CN 103198199 A CN103198199 A CN 103198199A CN 2012100031956 A CN2012100031956 A CN 2012100031956A CN 201210003195 A CN201210003195 A CN 201210003195A CN 103198199 A CN103198199 A CN 103198199A
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- 238000001816 cooling Methods 0.000 title claims abstract description 76
- 238000004364 calculation method Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000000498 cooling water Substances 0.000 claims abstract description 23
- 238000012856 packing Methods 0.000 claims description 24
- 239000007921 spray Substances 0.000 claims description 21
- 230000002411 adverse Effects 0.000 claims description 18
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 17
- 239000002826 coolant Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 3
- 238000005507 spraying Methods 0.000 abstract 2
- 239000004020 conductor Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009795 derivation Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 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
- 238000000605 extraction Methods 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- PICXIOQBANWBIZ-UHFFFAOYSA-N zinc;1-oxidopyridine-2-thione Chemical class [Zn+2].[O-]N1C=CC=CC1=S.[O-]N1C=CC=CC1=S PICXIOQBANWBIZ-UHFFFAOYSA-N 0.000 description 1
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Abstract
A three dimensional heating calculation method of a wet-type counter-flow type natural draft cooling tower comprises the steps as follows: (1) determining the feed water temperature and the feed water volume of the cooling tower, and arranging a first spraying source; (2) withdrawing the cooling water temperature and the cooling water volume at the upper part of the material filling area; (3) conducting material filling area heat transmission mass transfer and resisting force calculation; (4) withdrawing the cooling water temperature and the cooling water volume at the lower part of the material filling area, and arranging a second spraying source; and (5) conducting rainfall province heat transmission mass transfer and resisting force calculation, and acquiring the outputting water temperature of the cooling tower. The three dimensional heating calculation method solves the problem that the mutual changes between the liquid drop and the liquid film in the cooling water of the material filling area lead to difficult accurate calculation of the heat transmission mass transfer, is a comprehensive and accurate three dimensional heating method of a wet-type counter-flow type natural draft cooling tower, and provides 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 the three-dimensional thermal calculation method of a kind of wet type adverse current cooling stack, be used for wet type adverse current cooling stack heating power and calculate.
Background technology
Along with the minimizing day by day of coal oil resource, and national pay attention to day by day to environmental protection cause, electricity power enterprise's new project adopts big capacity unit and the nuclear power generating sets of high-efficiency low-pollution more mostly.Especially the development of the nuclear power generating sets main force of next stage China's energy development especially, according to " national nuclear power developing special topic planning (2005-2020) " and revision version afterwards thereof, China expects the year two thousand twenty nuclear power generating sets total volume will reach 8,000 ten thousand kilowatts.The configuration of nuclear power generating sets cooling tower adopts " machine one tower " configuration to have more advantage than " machine two towers " or " a machine multitower " at aspects such as economy, securities.But the wet type adverse current cooling stack scale in this configuration mode will be head and shoulders above the current specifications scope of application and built up wet type adverse current cooling stack scale, its flow field in tower skewness will be more obvious, and its heating power calculates should adopt three-dimensional thermal calculation method.But because there is the mutual conversion of drop, liquid film in the interior chilled water of cooling tower in the packing area.Realize that heat and mass and the pure three-dimensional computations of resistance between the soft air and chilled water is very difficult in this district.
Above-mentioned statement of facts, present stage realizes that by pure theoretical derivation and formula cooling tower filler district heat and mass and resistance three-dimensional computations are impossible realize.Its main cause is that cooling tower filler district chilled water exists drop, liquid film to change mutually.This conversion does not also draw rationally accurate relative theory analysis to the heat and mass between chilled water in the packing area and the soft air and interactional influence at present, can not carry out three-dimensional computations with corresponding theoretical derivation and formula.Studies show that the packing area is the main region that the interior heat and mass of cooling tower and resistance take place, its caloic exchange capacity accounts for 60 ~ 70% of whole cooling tower caloic exchange capacity.The soft air pressure drop of its generation also accounts for whole cooling tower soft air pressure drop 30%-40%, and in cooling tower thermal performance calculated, this regional heating power calculated and plays very crucial influence.
The three-dimensional thermal calculation method of a kind of wet type adverse current cooling stack is the three-dimensional thermal calculation method of cooling tower that a kind of test data and theoretical analysis combine, based on the filler field data, heat and mass and the three-dimensional heating power of resistance of finishing packing area in the cooling tower calculate, and then finish the three-dimensional heating power of whole cooling tower and calculate.
Summary of the invention
Technical matters to be solved by this invention: solve cooling tower filler district chilled water and exist drop, liquid film conversion to cause calculating the problem that is difficult to finish this district's chilled water and soft air heat and mass and resistance three-dimensional computations by theory derivation and formula purely, finish the three-dimensional heating power of cooling tower and calculate, for the design of cooling tower heating power and research provide foundation.
In order to address the above problem, the invention provides a kind ofly for the three-dimensional heating power Calculation Method of wet type adverse current cooling stack, may further comprise the steps:
(1) on top, cooling tower spray district first injection source is set;
(2) set up cooling tower spray district resistance model;
(3) set up cooling tower filler district heat and mass and resistance model;
(4) in bottom, cooling tower filler district second injection source is set;
(5) set up cooling tower rain belt heat and mass and resistance model.
Described on top, cooling tower spray district first injection source to be set be to advance the tower water temperature, advance the tower water yield and distribution thereof according to known cooling tower, distinguishes the jet face grid distribution situation on top in conjunction with spray, and first injection source corresponding with actual conditions is set.
The described cooling tower spray district resistance model of setting up is to write the relative resistance UDF program in spray district, advance the tower water temperature, advance the tower water yield and distribution thereof according to what first injection source was set, set up spray district resistance model, calculate by model and determine top, packing area coolant water temperature, cooling water inflow and distribution thereof.
Described cooling tower filler district heat and mass and the resistance model set up is to write cooling tower filler district heat and mass and resistance calculates the UDF program, extract top, packing area and calculate coolant water temperature, cooling water inflow and distribution thereof, set up cooling tower filler district heat and mass and resistance model, calculate by model and determine bottom, packing area coolant water temperature, cooling water inflow and distribution thereof.
Described second injection source that arranges in bottom, cooling tower filler district refers to extract bottom, packing area coolant water temperature, cooling water inflow and the distribution thereof of calculating, and in conjunction with the jet face grid distribution situation of bottom, packing area, arranges and the second corresponding injection source.
Describedly set up cooling tower rain belt heat and mass and resistance model is: write cooling tower rain belt heat and mass and resistance and calculate the UDF program, advance the tower water temperature, advance the tower water yield and distribution thereof according to what second injection source was set, set up cooling tower rain belt heat and mass and resistance model, calculate by model and determine tower cooler water temperature, cooling water inflow and distribution situation thereof.
The invention has the beneficial effects as follows: the present invention is the comprehensive and accurate three-dimensional thermal calculation method of a kind of wet type adverse current cooling stack, for wet type adverse current cooling stack heating power design and research provide foundation.
Description of drawings
Fig. 1 is wet type adverse current cooling stack synoptic diagram.
Fig. 2 is wet type adverse current cooling stack three-dimensional calculation method frame diagram.
Specific embodiments
Referring to Fig. 1, Fig. 2, a kind of wet type adverse current cooling stack three-dimensional calculation method can be divided into five the step carry out, be respectively:
The first step: determine that cooling tower advances the tower water temperature and advances the tower water yield, arranges first injection source.It is known advancing the tower water temperature and advancing the tower water yield, and spray face grid dividing condition and cooling tower spray density distribution situation in conjunction with top, cooling tower spray district can adopt DPM model and UDF program that first spray face is set.
Second step: extract top, packing area coolant water temperature and cooling water inflow.Establishment packing area UDF program, DPM model and UDF program calculate in the extraction first step top, packing area coolant water temperature and cooling water inflow and distribution situation thereof.
The 3rd step: carry out packing area heat and mass and resistance and calculate.Establishment packing area heat and mass and resistance calculate the UDF program.Top, the packing area coolant water temperature and the cooling water inflow that utilize to extract, in conjunction with the filler test data and in calculating cooling tower deployment scenarios, calculate bottom, packing area coolant water temperature and cooling water inflow.
The 4th step: extract bottom, packing area coolant water temperature and cooling water inflow, second injection source is set.Establishment rain belt UDF program, extract the UDF program calculates in the 3rd step bottom, packing area coolant water temperature and cooling water inflow and distribution situation thereof, spray face grid dividing condition and cooling tower spray density distribution situation in conjunction with top, cooling tower rain belt can adopt DPM model and UDF program that second spray face is set.
The 5th step: carry out rain belt heat and mass and resistance and calculate, obtain cooling tower and go out the tower water temperature.Establishment rain belt heat and mass and resistance calculate the UDF program.Utilize bottom, the packing area coolant water temperature and the cooling water inflow that extract, calculate bottom, rain belt coolant water temperature and cooling water inflow, finally obtain cooling tower and go out the tower water temperature.
Claims (6)
1. the three-dimensional thermal calculation method of wet type adverse current cooling stack is characterized in that, is made up of following steps: (1) arranges first injection source on top, cooling tower spray district; (2) set up cooling tower spray district resistance model; (3) set up cooling tower filler district heat and mass and resistance model; (4) in bottom, cooling tower filler district second injection source is set; (5) set up cooling tower rain belt heat and mass and resistance model.
2. the step (1) of the three-dimensional thermal calculation method of a kind of wet type adverse current cooling stack according to claim 1, it is characterized in that, it is described that on top, cooling tower spray district first injection source to be set be to advance the tower water temperature, advance the tower water yield and distribution thereof according to known cooling tower, jet face grid distribution situation in conjunction with top, spray district arranges first injection source corresponding with actual conditions.
3. the step (2) of the three-dimensional thermal calculation method of a kind of wet type adverse current cooling stack according to claim 1, it is characterized in that, the described cooling tower spray district resistance model of setting up is to write the relative resistance UDF program in spray district, advance the tower water temperature, advance the tower water yield and distribution thereof according to what first injection source was set, set up spray district resistance model, calculate by model and determine top, packing area coolant water temperature, cooling water inflow and distribution thereof.
4. the step (3) of the three-dimensional thermal calculation method of a kind of wet type adverse current cooling stack according to claim 1, it is characterized in that, described cooling tower filler district heat and mass and the resistance model set up is to write cooling tower filler district heat and mass and resistance calculates the UDF program, extract top, packing area and calculate coolant water temperature, cooling water inflow and distribution thereof, set up cooling tower filler district heat and mass and resistance model, calculate by model and determine bottom, packing area coolant water temperature, cooling water inflow and distribution thereof.
5. the step (4) of the three-dimensional thermal calculation method of a kind of wet type adverse current cooling stack according to claim 1, it is characterized in that, described second injection source that arranges in bottom, cooling tower filler district refers to extract bottom, packing area coolant water temperature, cooling water inflow and the distribution thereof of calculating, in conjunction with the jet face grid distribution situation of bottom, packing area, arrange and the second corresponding injection source.
6. the step (5) of the three-dimensional thermal calculation method of a kind of wet type adverse current cooling stack according to claim 1, it is characterized in that, described cooling tower rain belt heat and mass and the resistance model set up is to write cooling tower rain belt heat and mass and resistance calculates the UDF program, advance the tower water temperature, advance the tower water yield and distribution thereof according to what second injection source was set, set up cooling tower rain belt heat and mass and resistance model, calculate by model and determine tower cooler water temperature, cooling water inflow and distribution situation thereof.
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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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| CN103198199B CN103198199B (en) | 2017-05-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104239724A (en) * | 2014-09-19 | 2014-12-24 | 国家电网公司 | Online monitoring and assessment method for heat exchange efficiency of water-cooling system of converter valve |
| CN105806143A (en) * | 2016-03-16 | 2016-07-27 | 安徽皖苏电力运检科技有限公司 | Heat exchange device of thermal-power plant water cooling tower and three-dimension optimal distribution method for heat exchange device |
| CN110096845A (en) * | 2019-05-27 | 2019-08-06 | 山东科美自动化设备科技有限公司 | A kind of mixed flow type closed cooling tower design and calculation method |
| CN110186291A (en) * | 2019-05-27 | 2019-08-30 | 山东科美自动化设备科技有限公司 | A kind of mixed flow type closed cooling tower calculation and check method |
| 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 |
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| US20050258556A1 (en) * | 2004-05-22 | 2005-11-24 | Bosman Peter B | Fan-assisted wet coolong tower and method of reducing liquid loss |
| US20120004755A1 (en) * | 2010-06-30 | 2012-01-05 | Rockwell Automation Technologies, Inc. | Controlling the cooling of fermenters of a biofuel production plant |
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2012
- 2012-01-08 CN CN201210003195.6A patent/CN103198199B/en not_active Expired - Fee Related
Patent Citations (2)
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|---|---|---|---|---|
| US20050258556A1 (en) * | 2004-05-22 | 2005-11-24 | Bosman Peter B | Fan-assisted wet coolong tower and method of reducing liquid loss |
| US20120004755A1 (en) * | 2010-06-30 | 2012-01-05 | Rockwell Automation Technologies, Inc. | Controlling the cooling of fermenters of a biofuel production plant |
Non-Patent Citations (5)
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| RAFAT AL-WAKED ET AL.: "CFD simulation of wet cooling towers", 《APPLIED THERMAL ENGINEERING》 * |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104239724A (en) * | 2014-09-19 | 2014-12-24 | 国家电网公司 | Online monitoring and assessment method for heat exchange efficiency of water-cooling system of converter valve |
| 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 |
| CN105806143A (en) * | 2016-03-16 | 2016-07-27 | 安徽皖苏电力运检科技有限公司 | Heat exchange device of thermal-power plant water cooling tower and three-dimension optimal distribution method for heat exchange device |
| 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 |
| CN110096845A (en) * | 2019-05-27 | 2019-08-06 | 山东科美自动化设备科技有限公司 | A kind of mixed flow type closed cooling tower design and calculation method |
| CN110186291A (en) * | 2019-05-27 | 2019-08-30 | 山东科美自动化设备科技有限公司 | A kind of mixed flow type closed cooling tower calculation and check method |
| 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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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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Granted publication date: 20170503 |