A Design Method of Closed Cooling Tower for Steam Condensation

Abstract

The invention provides a design method of a closed cooling tower for steam condensation. According to the environmental meteorological conditions and condensation requirements, the specifications of the heat exchange tubes are selected, and the structure of the heat exchanger is designed according to the production practice experience: horizontal tube center distance, longitudinal tube center distance, Double-layer tube structure is selected for each process, and the inclined design of heat exchange tubes is used. Thermal analysis is performed according to energy conservation, basic formulas of heat transfer and empirical formulas for heat and mass transfer of circular tubes. Considering the mass transfer process in wet areas, the coil heat transfer coefficient is calculated. , mass transfer coefficient, determine the structure of the heat exchanger, obtain the required air distribution volume and spray water volume of the closed cooling tower, predict the steam condensation outlet temperature, the average temperature of the spray water, and the air temperature and moisture content of the tower, and the evaporation of the spray water Parameters such as quantity and replenishment quantity. The invention adopts the iterative calculation idea to improve the accuracy and standardization of the design process; combined with the production experience of heat exchangers, the design method is more widely used in the production practice of enterprises, the design efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The design method of the invention is applicable to the design calculation of a closed cooling tower for steam condensation, and belongs to the field of cooling tower design. Background technique [0002] As a new type of heat exchange equipment, the closed cooling tower has the advantages of water saving, energy saving, simple and compact structure, simple installation and maintenance, etc. It has better cooling efficiency than traditional heat exchange equipment, and the cooling medium is not different from the outside world. Direct contact ensures the cleanliness of the cooling medium, and has broad market prospects in the fields of air-conditioning, refrigeration, and chemical engineering. However, the domestic closed tower design method for steam condensation is not yet mature. Most manufacturers make estimates based on engineering experience, or refer to traditional design methods for design. There are large heat exchange area margins, many consu...

AI Technical Summary

Problems solved by technology

However, the domestic closed tower design method for steam condensation is not yet mature. Most manufacturers make estimates based on engineering experience, or refer to traditional design methods for design. There are large heat exchange area margins, many consumables, high costs, and waste of resources. And other issues

[0003] In addition, the traditional closed cooling tower thermal analysis focuses on the heat transfer calculation, but the heat of the medium in the pipe depends on the latent heat of vaporization of the spray water to be transferred to the air to carry the heat away, so the heat and mass transfer calculation of the spray water and air outside the pipe It is also an indispensable and important part of the thermal analysis of closed cooling towers. However, in the design of traditional closed cooling towers, the mass transfer analysis of the wet area is not available.

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