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A calibration method of closed cooling tower for steam condensation

A closed cooling tower and steam condensation technology, which is applied in the field of calibration and calculation, to achieve the effect of increasing mass transfer analysis, increasing rigor and reliability, and ensuring safety

Active Publication Date: 2021-08-06
山东恒锐鑫禾工程技术有限公司
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  • Application Information

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Problems solved by technology

However, the comprehensive consideration of heat transfer analysis and mass transfer analysis is often lacking in conventional calibration calculations.

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  • A calibration method of closed cooling tower for steam condensation

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Embodiment 1

[0027] Design working conditions: single tower cooling steam flow rate 3t / h, steam condensation temperature 70°C, target cooling temperature 40°C. Design environmental meteorological conditions: ambient atmospheric pressure 99.4PakPa, ambient air dry bulb temperature 31.5°C, ambient air wet bulb temperature 28°C; calculate relative humidity φ i 0.765, the moisture content of the air entering the tower is 0.02182kg / kg (DA), the dry bulb temperature corresponds to the saturated steam partial pressure of 4.49kPa, the wet bulb temperature corresponds to the saturated steam partial pressure of 3.6698kPa, and the wet air density of the entering tower is 1.1487kg / m 3 , the enthalpy value of the air entering the tower is 86.968kJ / kg;

[0028] Coil structure material: carbon steel pipe, heat exchange tube specification: 25×1mm, tube length 3m, 2 layers of tubes per pass, 192 tubes per pass, 10 passes in total, heat exchange area 339.292m 2 . Tower type parameters: tower length 3.95m,...

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Abstract

The invention provides a method for checking the closed cooling tower used for steam condensation. It is known that the parameters of the closed cooling tower, such as fan air volume, spray water volume, cooling task, heat exchange coil, tower type, etc., are based on energy conservation and heat transfer. Formulas and empirical formulas for heat and mass transfer are used for thermodynamic analysis, using iterative calculation ideas, and considering the area of ​​wet area and cold area and the mass transfer process of wet area, the actual heat transfer coefficient and mass transfer coefficient of the coil are calculated, and the average temperature of spray water is predicted. Check the temperature of the steam out of the tower, and check whether the design of the closed cooling tower for steam condensation can meet the cooling requirements. The invention adopts the idea of ​​iterative calculation, which improves the standardization and accuracy of the design process. The checking method of the present invention can be used to check the closed cooling tower in the design stage and the operation stage after completion, which improves the design calculation and efficiency, and accelerates the optimization and upgrading of the closed cooling tower in enterprises.

Description

technical field [0001] The check calculation method of the invention is aimed at the check process of the existing closed cooling tower, and belongs to the field of cooling tower design. Background technique [0002] The closed cooling tower has a good cooling effect, and the cooling medium is not in direct contact with the outside world, which ensures the cleanliness of the cooling medium, and has broad market prospects in the fields of air conditioning, refrigeration, and chemical industry. However, the domestic closed cooling tower calibration method is still immature. Many manufacturers only design and produce according to the engineering experience or according to the heat exchanger design method. Without the calibration process, the cooling performance of the closed cooling tower cannot be guaranteed. In particular, for the closed-circuit cooling tower used for steam condensation, the current calibration and calculation methods in the industry are not yet mature, and a...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28C1/14
CPCF28C1/14F28F2200/00
Inventor 赵元宾李慧杨玉杰
Owner 山东恒锐鑫禾工程技术有限公司