CN100565122C - The power generating plant cooling tower terminal difference computing method - Google Patents
The power generating plant cooling tower terminal difference computing method Download PDFInfo
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- CN100565122C CN100565122C CNB2008100553589A CN200810055358A CN100565122C CN 100565122 C CN100565122 C CN 100565122C CN B2008100553589 A CNB2008100553589 A CN B2008100553589A CN 200810055358 A CN200810055358 A CN 200810055358A CN 100565122 C CN100565122 C CN 100565122C
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- 238000012360 testing method Methods 0.000 claims abstract description 12
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Abstract
The present invention relates to a kind of power generating plant cooling tower terminal difference computing method, this method comprises following three steps: (1) is at first tested cooling tower and is gone out the tower circulating water temperature and advance the tower air parameter; (2) calculate into tower air characteristics temperature according to advancing the tower air parameter; Calculate cooling tower terminal difference: (3) cooling tower terminal difference=go out tower circulating water temperature-advance tower air characteristics temperature.The invention has the beneficial effects as follows the cooling effect of investigating cooling tower by the temperature difference that goes out tower water temperature and environment, notion is simple, implication is clear, easy to use, carry out the calculating of DIFFERENT METEOROLOGICAL CONDITIONS colling end difference, improve the calculated level of test, can make on-the-spot effect and energy-saving potential that comparatively clear and definite directly understanding is arranged cooling tower.
Description
Technical field
The present invention relates to a kind of power generating plant cooling tower terminal difference computing method, be applicable to the test and the operation test of power generating plant cooling tower.
Background technology
Cooling tower comes down to a heat transmitter, goes out tower water temperature relative method in the tradition cooling effect assessment, the qualification of having added various design conditionss, the changeable meteorological condition and the concrete condition of the recirculated water temperature difference in the inapplicable reality.
Traditional cooling tower measurement of test method result adopts the mode of characteristic equation to provide, and promptly gas-water ratio ~ cooling number curve should have certain disconnection with the scene.
Summary of the invention
Technical matters to be solved by this invention provides a kind of accurate comparatively comprehensively and power generating plant cooling tower terminal difference computing method that reflect the working condition of cooling tower in time directly perceived.
The technical solution adopted for the present invention to solve the technical problems:
The power generating plant cooling tower terminal difference computing method is characterized in that:
(1) at first tests cooling tower and go out the tower circulating water temperature and advance the tower air parameter, advance the tower air parameter and include atmospheric pressure, dry-bulb temperature, wet-bulb temperature;
(2) calculate into tower air characteristics temperature according to advancing the tower air parameter:
Advance the definition of tower air characteristics temperature:
To go into the unification of tower air humidity goes into the corresponding dry-bulb temperature of tower air enthalpy and is into tower air characteristics temperature with actual after the standard value;
Described standard value is the mean value of a certain region air humidity for many years;
(3) calculate cooling tower terminal difference:
Cooling tower terminal difference=go out tower circulating water temperature-advance tower air characteristics temperature;
Adopt the way of programming to calculate cooling tower terminal difference.
Principle of work of the present invention and rationale:
(1) introducing of cooling tower terminal difference
Cooling tower comes down to a heat transmitter, goes out tower water temperature relative method in the tradition cooling effect assessment, and the qualification of having added various design conditionss is unsuitable for the concrete condition of the meteorological condition changeable in the reality and the recirculated water temperature difference.This method integrated survey cooling tower go out gap between tower circulating water temperature and heat eliminating medium, be that cooling effect further and is more accurately characterized, embodied that production run and external environment are indivisible gets in touch.
Adopt this method to investigate cooling effect, can be comparatively comprehensively accurately and intuitively reflect the working condition of cooling tower in time, enrich cooling tower performance test theory, make evaluation of test result more flexible, more convenient and directly instruct production practices, promoted deeply carrying out of cooling tower reducing energy consumption research.
The notion of cooling tower terminal difference is a kind of method of proposition that actual conditions are summed up at the present stage industry spot, it has promptly comprised the working condition of cooling tower, comprised the influence of environmental baseline again, provide a reliable platform for different regions, different power station, dissimilar cooling towers compare.
(2) tolerance of cooling tower terminal difference
The heat exchange of cooling tower is based on the enthalpy difference between air and recirculated water, the enthalpy of air is determined jointly by temperature and humidity, cool off to wet-bulb temperature recirculated water unrealistic at the scene, this needs and abundant air and sufficient duration of contact, air mass flow is lower than quantity of circulating water in the cooling tower, duration of contact is in the time in several seconds, thereby considers that merely a kind of factor is objective inadequately and accurate, should serve as to calculate the benchmark of cooling tower terminal difference with the tower air characteristics temperature of advancing under the different enthalpy.
Definite method of advancing tower air characteristics temperature is as follows: the soft air enthalpy is by dry-bulb temperature and humidity decision, for adapting to on-the-spot changeable situation, this method is with humidity unification to a standard value (as selecting the long-time average annual value of a certain region), and like this, the soft air enthalpy is just corresponding one by one with dry-bulb temperature.Go into tower soft air enthalpy according to actual measurement, can obtain the dry-bulb temperature under this standard humidity, this temperature is into tower air characteristics temperature.
The benefit of this correction is:
A, can be with advancing tower air characteristics temperature as benchmark, the contrast cooling tower terminal difference is in the situation of change of the whole year.
Weigh the effect of cooling tower with the method for end difference, this is direct, the most comprehensive a kind of evaluation method, simultaneously again can the exclusive segment influence factor, set up a platform, and make different cooling towers that very strong comparability be arranged.
B, can carry out the contrast between the different cooling towers.With merely relatively cooling tower go out the tower water temperature, adopt cooling tower terminal difference to compare, a benchmark has been arranged between different cooling towers, can reflect the working condition of cooling tower more exactly.In contrast to this, the thermodynamic property equation of cooling tower characterize mainly with the characteristic of filler, abundant inadequately to the design of cooling tower, construction, operation conditions performance.
C, advance tower air characteristics temperature and adopt dry-bulb temperature as benchmark, approaching with people's natural sense organ, and also commonly used far beyond wet-bulb temperature, strengthen direct feel.
(3) calculating of cooling tower terminal difference
In view of the soft air enthalpy is a function of functions, wet-bulb temperature changes much higher to humidity effect when temperature is higher.Put a comparatively simple and direct experimental formula in order and calculate, even also be unusual difficulty in a temperature variation small range, and in the actual production process, changes in environmental conditions is sizable, thereby it is comparatively suitable that the way of taking to programme is calculated.
The use of calculation procedure (referring to Fig. 1):
At first determine whether to preserve file,, click " new files " that program is carried out initialization, empties the option that needs, then import file name if preserve.
Thereafter select date of test, default setting is to calculate the same day, as is other date, selects in the window that ejects.
It is unified to standard value to go into the tower air themperature, goes into the corresponding dry-bulb temperature of tower air enthalpy and is into tower air characteristics temperature with actual.
According to relevant criterion, tower is done to survey, wet-bulb temperature is tried to achieve into tower air enthalpy, adopts the method for computer iterations to obtain into tower air characteristics temperature by standard humidity then, and is poor with this end of measuring cooling.
The invention has the beneficial effects as follows the cooling effect of investigating cooling tower by the temperature difference that goes out tower water temperature and environment, notion is simple, implication is clear, easy to use, carry out the calculating of DIFFERENT METEOROLOGICAL CONDITIONS colling end difference, improve the calculated level of test, can make on-the-spot effect and energy-saving potential that comparatively clear and definite directly understanding is arranged cooling tower.
Description of drawings
Fig. 1 is a cooling tower terminal difference calculation procedure process flow diagram.
Embodiment
Get final product according to the operation of the technical scheme described in the foregoing invention content part.
Enumerate the result of calculation (1-4 sees attached list) of 4 object lessons below:
Subordinate list 1
| Advance tower air dry-bulb temperature ℃ | 34.00 |
| Advance tower air ' s wet bulb temperature ℃ | 22.10 |
| Go out tower circulating water temperature ℃ | 34.60 |
| Advance tower air enthalpy kJ/kg | 15.473114 |
| Cooling tower terminal difference ℃ | 8.55 |
| Advance tower air characteristics temperature ℃ | 26.05 |
Annotate: (1) experimental subjects is a cooling tower of head of the horse generating plant, host capacity 100MW, film-cooled heat 2000m
2
(2) test period: on July 9th, 2007.
Subordinate list 2:
| Advance tower air dry-bulb temperature ℃ | 30.00 |
| Advance tower air ' s wet bulb temperature ℃ | 22.38 |
| Go out tower circulating water temperature ℃ | 31.80 |
| Advance tower air enthalpy kJ/kg | 15.698183 |
| Cooling tower terminal difference ℃ | 5.35 |
| Advance tower air characteristics temperature | 26.45 |
Annotate: (1) experimental subjects is a cooling tower of Handan cogeneration plant, host capacity: 200MW, film-cooled heat 3500m
2
(2) test period: on July 24th, 2007.
Subordinate list 3:
| Advance tower air dry-bulb temperature ℃ | 28.90 |
| Advance tower air ' s wet bulb temperature ℃ | 25.40 |
| Go out tower circulating water temperature ℃ | 31.20 |
| Advance tower air enthalpy kJ/kg | 18.860697 |
| Cooling tower terminal difference ℃ | 1.78 |
| Advance tower air characteristics temperature ℃ | 29.42 |
Annotate: (1) experimental subjects is a cooling tower of generating plant, Xibaipo, host capacity: 300MW, film-cooled heat 5500m
2
(2) test period: on July 31st, 2007.
Subordinate list 4:
| Advance tower air dry-bulb temperature ℃ | 30.01 |
| Advance tower air ' s wet bulb temperature ℃ | 23.43 |
| Go out tower circulating water temperature ℃ | 30.97 |
| Advance tower air enthalpy kJ/kg | 16.747449 |
| Cooling tower terminal difference ℃ | 3.34 |
| Advance tower air characteristics temperature ℃ | 27.63 |
Annotate: (1) experimental subjects is a cooling tower of the Xibaipo second generating Ltd, host capacity 600MW, film-cooled heat 8500m
2
(2) test period: on August 15th, 2007.
Claims (1)
1, power generating plant cooling tower terminal difference computing method is characterized in that:
(1) at first tests cooling tower and go out the tower circulating water temperature and advance the tower air parameter, advance the tower air parameter and include atmospheric pressure, dry-bulb temperature, wet-bulb temperature;
(2) calculate into tower air characteristics temperature according to advancing the tower air parameter:
Advance the definition of tower air characteristics temperature:
To go into the unification of tower air humidity goes into the corresponding dry-bulb temperature of tower air enthalpy and is into tower air characteristics temperature with actual after the standard value;
Described standard value is the mean value of a certain region air humidity for many years;
(3) calculate cooling tower terminal difference:
Cooling tower terminal difference=go out tower circulating water temperature-advance tower air characteristics temperature;
Adopt the way of programming to calculate cooling tower terminal difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100553589A CN100565122C (en) | 2008-07-08 | 2008-07-08 | The power generating plant cooling tower terminal difference computing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2008100553589A CN100565122C (en) | 2008-07-08 | 2008-07-08 | The power generating plant cooling tower terminal difference computing method |
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| CN101303244A CN101303244A (en) | 2008-11-12 |
| CN100565122C true CN100565122C (en) | 2009-12-02 |
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| CNB2008100553589A Active CN100565122C (en) | 2008-07-08 | 2008-07-08 | The power generating plant cooling tower terminal difference computing method |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104361148A (en) * | 2014-10-17 | 2015-02-18 | 广州市地下铁道总公司 | Design method of transverse flow type cooling tower |
| CN108984948B (en) * | 2018-08-07 | 2023-04-07 | 济南蓝辰能源技术有限公司 | Method for evaluating fog plume state at outlet of cooling tower |
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2008
- 2008-07-08 CN CNB2008100553589A patent/CN100565122C/en active Active
Non-Patent Citations (4)
| Title |
|---|
| 冷却塔性能评价系统软件设计. 郭江龙，张树芳，杨海生，姚力强，郗孟杰.电站辅机，第93卷第2期. 2005 |
| 冷却塔性能评价系统软件设计. 郭江龙，张树芳，杨海生，姚力强，郗孟杰.电站辅机，第93卷第2期. 2005 * |
| 逆流式自然通风冷却塔的热力性能评价软件. 姚力强，王惠敏.电力科学与工程，第24卷第4期. 2008 |
| 逆流式自然通风冷却塔的热力性能评价软件. 姚力强，王惠敏.电力科学与工程，第24卷第4期. 2008 * |
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Owner name: STATE GRID CORPORATION OF CHINA HEBEI ELECTRIC POW Effective date: 20121219 Owner name: HEBEI ELECTRIC POWER CORPORATION ELECTRIC POWER RE Free format text: FORMER OWNER: HEBEI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20121219 |
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Effective date of registration: 20121219 Address after: 050021 No. 238 South Sports street, Yuhua Road, Hebei, Shijiazhuang Patentee after: Electric Power Research Institute of Hebei Electric Power Corporation Patentee after: State Grid Corporation of China Patentee after: Hebei Electric Power Construction & Adjustment Research Institute Address before: 050021 Hebei city of Shijiazhuang Province Sports South Street No. 238 Hebei Electric Power Research Institute Patentee before: Hebei Electric Power Research Institute |