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Design method of mechanical draft cooling tower of essential service water system in nuclear power plant

An important plant water and mechanical ventilation technology, applied in the direction of water shower coolers, refrigeration plants, lighting and heating equipment, etc., can solve the problems of complicated design of mechanical ventilation cooling towers, long design cycle, and many manpower and material resources, etc., to achieve reduction Design time and design cost, improve design efficiency, and meet the effect of construction needs

Active Publication Date: 2014-06-25
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology

The design of the mechanical ventilation cooling tower of a new-sized nuclear power plant’s important plant water system is quite cumbersome. Not only the structure of the cooling tower needs to be recalculated, but also the equipment in the cooling tower must be redesigned because there are no serialized standard products. There are many manpower and material resources, and the design cycle is quite long, which will seriously affect the construction of nuclear power plants

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  • Design method of mechanical draft cooling tower of essential service water system in nuclear power plant
  • Design method of mechanical draft cooling tower of essential service water system in nuclear power plant
  • Design method of mechanical draft cooling tower of essential service water system in nuclear power plant

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Embodiment

[0028] Table 1 shows the parameter values ​​of the important plant water system of the nuclear power plant under different operating conditions, including the cooling tower outlet water temperature, heat load, etc.

[0029] Table 1

[0030]

[0031] According to the maximum temperature difference between the inlet and outlet water of the cooling tower in the important plant water system is 10°C, combined with Table 1, the main design parameters under different working conditions shown in Table 2 below are calculated:

[0032] Table 2

[0033]

[0034] According to the above table 2, each cooling tower can be divided, and the principle is to set the number of units operating under each working condition as an even number. According to this principle, the cooling tower can be divided into 8 or 10 units, 6 or 8 units are in operation under the most unfavorable conditions, and 2 units are in standby. Under normal operating conditions, 4 units operate, each unit has a heat ...

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Abstract

The invention relates to a design method of a mechanical draft cooling tower of an essential service water system in a nuclear power plant. The design method comprises the following steps: (I) figuring out a cooling water consumption of the cooling tower according to the operation condition of the essential service water system in the nuclear power plant; (II) segmenting an interior space of the cooling tower into a plurality of tower units to obtain cooling water consumptions and heat loads of decomposed tower units; (III) based on a cooling parameter of an existing mechanical draft cooling tower, analyzing the feasibility of a theoretical value of a cooling parameter of each tower unit, and determining a proper cooling parameter of each tower unit; and (IV) determining an actual value of the cooling parameter of the cooling tower according to a field meteorological condition and determining the size of the cooling tower. By adopting the method provided by the invention, the cooling tower can be prevented from being re-designed in large range, equipment (including a fan) in the cooling tower does not need to be re-designed, thus the design time is shortened and the design cost is reduced, the design efficiency is improved, and the building demand of the nuclear power plant is rapidly met.

Description

technical field [0001] The invention belongs to the technical field of structural design of a mechanical ventilation tower of an important plant water system of a nuclear power plant, and in particular relates to a design method of a mechanical ventilation cooling tower of an important plant water system of a nuclear power plant. Background technique [0002] Mechanical ventilation cooling towers are widely used in industrial fields, such as metallurgy, chemical industry and thermal power plants. Commonly used mechanical ventilation cooling towers are designed according to the operating conditions (heat, water, etc.) and local meteorological conditions to design the size of the required cooling tower and the size of the exhaust fan installed on the top of the tower, usually set More than two cooling towers, one of which is in standby. The cooling tower designed in this way has good flexibility, and different layouts can be adopted for the same area, all of which can adapt t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28C1/00E04H5/12
Inventor 余兵李京彭超王东海赵云弛杨若冰
Owner CHINA NUCLEAR POWER ENG CO LTD
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