CN103884202B - A kind of method for designing of essential service water system at nuclear power plant mechanical-draft cooling tower - Google Patents
A kind of method for designing of essential service water system at nuclear power plant mechanical-draft cooling tower Download PDFInfo
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- CN103884202B CN103884202B CN201410066583.8A CN201410066583A CN103884202B CN 103884202 B CN103884202 B CN 103884202B CN 201410066583 A CN201410066583 A CN 201410066583A CN 103884202 B CN103884202 B CN 103884202B
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- 238000001816 cooling Methods 0.000 title claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000498 cooling water Substances 0.000 claims abstract description 12
- 238000003491 array Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002826 coolant Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The present invention relates to a kind of method for designing of essential service water system at nuclear power plant mechanical-draft cooling tower, comprise the following steps: (I) calculates the cooling water inflow of cooling tower according to essential service water system at nuclear power plant operating condition; (II) inner space of cooling tower is divided into some tower unit, obtains cooling water inflow and the thermic load of the tower unit decomposed; (III) with the cooling parameter of existing mechanical-draft cooling tower for benchmark, analyze the feasibility of the theoretical value of the cooling parameter of each tower unit, determine the suitable cooling parameter of each tower unit; (IV) cooling tower size is determined according to the actual value of the cooling parameter of on-the-spot meteorological condition determination cooling tower.Adopt method provided by the invention can avoid redesigning on a large scale cooling tower, equipment (comprising blower fan) in cooling tower does not need to redesign, decrease design time and design cost, improve design efficiency, to meet the construction needs of nuclear power plant more quickly.
Description
Technical field
The invention belongs to essential service water system at nuclear power plant force ventilation tower structure design field, be specifically related to a kind of method for designing of essential service water system at nuclear power plant mechanical-draft cooling tower.
Background technology
Mechanical-draft cooling tower extensive use industrial circle, as field of metallurgy, chemical field and thermal power plant etc.Conventional mechanical-draft cooling tower is according to factors such as operating condition (heat that need take out of, the water yield etc.) and local meteorological conditions, design the size of required cooling tower and be located at the size of tower top exhaust blower, the cooling tower of more than two is set usually, wherein one for subsequent use.The cooling tower flexibility designed like this is good, can adopt different layouts to identical region, can adapt to local condition and operating condition.
But this design is not suitable for the setting of essential service water system at nuclear power plant mechanical-draft cooling tower.Essential service water system at nuclear power plant mechanical-draft cooling tower is nuclear safe level items, and antidetonation I class has the requirement of missile roof, high to the equipment requirement in the structure of cooling tower and cooling tower, is generally forced draft mechnical cooling tower.For ensureing the redundancy of equipment, cooling tower arranges multiple unit, and even numbers is arranged symmetrically with.The essential service water system at nuclear power plant mechanical-draft cooling tower design of a new size is quite loaded down with trivial details, the housing structure being not only cooling tower will recalculate, equipment in cooling tower is not because have the standardized product of seriation will redesign yet, the man power and material related to is more, design cycle is also quite long simultaneously, will have a strong impact on the construction of nuclear power plant.
Summary of the invention
For the defect existed in prior art, the object of this invention is to provide a kind of method for designing of essential service water system at nuclear power plant mechanical-draft cooling tower, adopt this method for designing to reduce the duplication of labour, save design cost.
For reaching above object, the technical solution used in the present invention is: a kind of method for designing of essential service water system at nuclear power plant mechanical-draft cooling tower, comprises the following steps:
(I) cooling water inflow of cooling tower is calculated according to essential service water system at nuclear power plant operating condition;
(II) inner space of cooling tower is divided into some tower unit, obtains cooling water inflow and the thermic load of the tower unit decomposed;
(III) with the cooling parameter of existing mechanical-draft cooling tower for benchmark, analyze the feasibility of the theoretical value of the cooling parameter of each tower unit, determine the suitable cooling parameter of each tower unit;
(IV) cooling tower size is determined according to the actual value of the cooling parameter of on-the-spot meteorological condition determination cooling tower.
Further, in step (III), the cooling parameter of existing essential service water system at nuclear power plant mechanical-draft cooling tower comprises the air quantity of the size of existing cooling tower, cooling water flow and Ventilator Room.
Further again, during design, the blower fan be located in tower unit is located at the side of tower unit.
Further, in step (II), adopting the mode simultaneously increasing and decreasing two tower unit to split designed cooling tower, is even numbers symmetric arrays during the arrangement of tower unit.
Further again, the number of tower unit is 6 or 8.
Further, during design, the inlet passage be located in cooling tower is located at the symmetrical centre place of the tower unit symmetrically arranged.
Adopt method provided by the invention can avoid redesigning on a large scale cooling tower, equipment (comprising blower fan) in cooling tower does not need to redesign, decrease design time and design cost, improve design efficiency, to meet the construction needs of nuclear power plant more quickly.
Accompanying drawing explanation
Fig. 1 is the flow chart of a kind of essential service water system at nuclear power plant mechanical-draft cooling tower method for designing provided by the invention;
The schematic diagram that in Fig. 2 the inventive method, cooling tower internal structure is arranged.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, the method for designing of a kind of essential service water system at nuclear power plant mechanical-draft cooling tower provided by the present invention comprises the following steps:
(I) cooling water inflow of cooling tower is calculated according to essential service water system at nuclear power plant operating condition;
(II) some tower unit 2(are divided into the inner space of cooling tower to see Fig. 2), the cooling water inflow of the cooling tower of step (I) and thermic load are decomposed each tower unit 2;
(III) with the cooling parameter of existing essential service water system at nuclear power plant mechanical-draft cooling tower (comprising the air quantity of existing cooling water flow, thermic load and Ventilator Room) for benchmark, determine the suitable cooling parameter of each tower unit 2;
(IV) according to the suitable cooling parameter of each tower unit 2 in step (III), and the actual value of the cooling parameter of on-the-spot meteorological condition determination cooling tower determine cooling tower size.
Adopting during this method design adopts the mode simultaneously increasing and decreasing two tower unit 2 to design.The multiple tower unit 2 be divided into are that even numbers is arranged symmetrically with when arranging, and are generally 6 or 8, are usually no less than 6, with satisfied different factory sites condition.
In this method, during design, the Ventilator Room 1 of cooling tower is located at the side of each tower unit 2, and Ventilator Room 1 adopts air blast.In addition, the inlet passage 3 of cooling tower is located at the symmetrical centre place of the tower unit 2 of symmetric arrays, and cooling water is led in each tower unit by aqueduct.
Below with the present invention of a specific embodiment description.
Embodiment
Table 1 shows the parameter value of essential service water system at nuclear power plant under different operating condition, comprises cooling tower outlet water temperature, thermic load etc.
Table 1
Be 10 DEG C according to essential service water system cooling tower Inlet and outlet water maximum temperature difference, associative list 1 calculates the main design parameters under the different operating modes shown in following table 2:
Table 2
According to upper table 2, every cooling tower can be split, principle is the unit number run under each operating mode is set to even numbers as far as possible.Cooling tower can be divided into 8 or 10 unit according to this principle, under the most unfavorable processing condition, 6 or 8 unit run, and 2 unit are for subsequent use.During accidental conditions, 4 unit run, and each unit thermic load 6.45MW, each cell processing water yield is 875m
3/ h; During loss of-coolant accident (LOCA), 4 or 6 unit run simultaneously, each unit thermic load 10-6.67MW, and each cell processing water yield is 875-600m
3/ h; During cold shut operating mode B, 6 or 8 unit run simultaneously, and 2 unit are for subsequent use, each unit thermic load 9-6.75MW, and each cell processing water yield is 783-588m
3/ h.
Existing essential service water system at nuclear power plant mechanical-draft cooling tower individual unit thermic load is 10.5MW, and the process water yield is 900m
3/ h, fan delivery is 60-75 ten thousand m
3/ h.Analyze with this, above-mentioned cooling tower can be divided into 8 unit, and during normal operation, 4 unit run, and 4 unit are for subsequent use, each unit thermic load 6.45MW; During loss of-coolant accident (LOCA), 4 unit run simultaneously, and 4 unit are for subsequent use, each unit thermic load 10MW; During cold shut operating mode B, 6 unit run simultaneously, and 2 unit are for subsequent use, each unit thermic load 9MW, and each cell processing water yield is 783m
3/ h.
Now, can check the carrying out of cooling tower outlet water temperature under each operating mode according to on-the-spot meteorological condition, outlet water temperature is lower than setting.One can be of a size of with two tower unit 2 of existing essential service water system at nuclear power plant mechanical-draft cooling tower and corresponding Ventilator Room 1 and arrange that module is arranged.Above-described embodiment is the size that cooling tower is of a size of four modules.If outlet water temperature is higher than setting after calculating, increases by two tower unit 2 and again check outlet water temperature.
Above-mentioned embodiment just illustrates of the present invention, and the present invention also can implement with other ad hoc fashion or other particular form, and does not depart from main idea of the present invention or substantive characteristics.Therefore, description embodiment from the viewpoint of any all should be considered as illustrative but not determinate.Scope of the present invention should be illustrated by the claim of adding, any also should be within the scope of the present invention with the intention of claim and the change of scope equivalence.
Claims (6)
1. a method for designing for essential service water system at nuclear power plant mechanical-draft cooling tower, comprises the following steps:
(I) cooling water inflow of cooling tower is calculated according to essential service water system at nuclear power plant operating condition;
(II) inner space of cooling tower is divided into some tower unit, the cooling water inflow of the cooling tower of step (I) and thermic load are decomposed each tower unit;
(III) with the cooling parameter of existing essential service water system at nuclear power plant mechanical-draft cooling tower for benchmark, analyze the feasibility of the theoretical value of the cooling parameter of each tower unit, determine the suitable cooling parameter of each tower unit;
(IV) according to the suitable cooling parameter of each tower unit in on-the-spot meteorological condition calculation procedure (III), determine the actual value of the cooling parameter of cooling tower, and obtain cooling tower size.
2. the method for designing of a kind of essential service water system at nuclear power plant mechanical-draft cooling tower according to claim 1, it is characterized in that, in step (III), the cooling parameter of existing essential service water system at nuclear power plant mechanical-draft cooling tower comprises the air quantity of the size of existing cooling tower, cooling water flow and Ventilator Room.
3. the method for designing of a kind of essential service water system at nuclear power plant mechanical-draft cooling tower according to claim 2, is characterized in that, during design, the blower fan be located in tower unit is located at the side of tower unit.
4. the method for designing of a kind of essential service water system at nuclear power plant mechanical-draft cooling tower according to claim 1 and 2, it is characterized in that, in step (II), adopting the mode simultaneously increasing and decreasing two tower unit to split designed cooling tower, is even numbers symmetric arrays during the arrangement of tower unit.
5. the method for designing of a kind of essential service water system at nuclear power plant mechanical-draft cooling tower according to claim 4, is characterized in that, the number of tower unit is 6 or 8.
6. the method for designing of a kind of essential service water system at nuclear power plant mechanical-draft cooling tower according to claim 4, is characterized in that, during design, the inlet passage be located in cooling tower is located at the symmetrical centre place of the tower unit symmetrically arranged.
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| CN106679493B (en) * | 2017-01-03 | 2018-08-21 | 华电电力科学研究院 | A kind of decreasing water distribution method improving cooling tower heat exchange efficiency in two machines, one tower |
| CN111043877B (en) * | 2018-10-15 | 2021-08-20 | 济南蓝辰能源技术有限公司 | Design method of closed cooling tower for steam condensation |
| CN116956764B (en) * | 2023-06-06 | 2025-07-11 | 中国核电工程有限公司 | Nuclear island cold chain system cluster reduced design method based on optimization algorithm |
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| US4076771A (en) * | 1976-11-19 | 1978-02-28 | The Marley Cooling Tower Company | Bottom vented wet-dry water cooling tower |
| CN1212359A (en) * | 1998-04-29 | 1999-03-31 | 北京大学 | Dry type cooling tower air-controlled design scheme |
| CN202195716U (en) * | 2011-06-30 | 2012-04-18 | 北京城建设计研究总院有限责任公司 | Integrated cooling tower group with large system and small system being equal in height |
| CN102839819B (en) * | 2012-08-21 | 2014-12-10 | 中国能源建设集团广东省电力设计研究院 | Flexible attachment arranging and selecting method of ultra-large type cooling tower construction tower crane based on tower barrel safety |
| CN202788078U (en) * | 2012-09-06 | 2013-03-13 | 中国能源建设集团广东省电力设计研究院 | Tower group comprising cooling towers |
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