Closed cooling tower checking method based on hot water cooling

A closed cooling tower and hot water cooling technology is applied in the field of check calculation to achieve the effects of saving operating costs, reducing production costs and improving heat exchange efficiency

Active Publication Date: 2020-04-21
济南蓝辰能源技术有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] However, the comprehensive consideration of heat transfer analysis and mass transfer analysis is often lacking in conventional calibration calculations.

Method used

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  • Closed cooling tower checking method based on hot water cooling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Determine the working condition of the closed tower: single tower cooling water flow Q=25m 3 / h, hot water inlet temperature T 1 =42℃, outlet temperature T 2 =32°C,

[0064] Determine the meteorological conditions: dry bulb temperature θ=31°C, wet bulb temperature τ=27.5°C, atmospheric pressure Pa=101.325kPa, calculate relative humidity φ i 0.765, the moisture content of the air entering the tower x i 0.02182kg / kg(DA), dry bulb temperature corresponds to saturated steam partial pressure p θ 4.49kPa, wet bulb temperature corresponds to saturated steam partial pressure p τ 3.6698kPa, the density of wet air entering the tower ρ i 1.1487kg / m 3 , the enthalpy value of air entering the tower h i 86.968kJ / kg.

[0065] Determine coil structure parameters and tower type parameters: material: galvanized steel pipe, elliptical tube specification: 31.8×21.6×1.5mm, tube length 2.58m, 2 layers of tubes per pass, 41 tubes per pass, 10 rows in total, heat exchange area 89.8m2,...

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Abstract

The invention provides a closed cooling tower checking method based on hot water cooling. According to existing parameters such as environmental meteorological conditions, cooling tasks, existing tower model parameters, the cooling tower spraying water yield and the fan delivery and by means of heat transfer theory basic formulas and oval tube heat and mass transfer empirical formulas, thermal analysis is carried out, the hot water outlet temperature is calculated, the cooling capacity of a closed cooling tower is verified, and design and optimization of the closed cooling tower are guided. The checking method comprises thermodynamic heat transfer analysis and further comprises mass transfer analysis of a wet area portion. Besides, a mature calculation method is provided for the special closed cooling tower composed of an oval tube heat exchanger, mature closed tower checking calculation theories are provided for production of an existing unconventional closed tower, the rationality ofclosed tower design is verified, the heat exchange efficiency is improved, the production cost is reduced, and the operating cost is reduced.

Description

technical field [0001] The check calculation method of the invention is applicable to 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 water is not in direct contact with the outside world, which ensures the cleanliness of the cooling water and has a broad market prospect. [0003] However, domestic closed tower design and verification methods are still immature, many manufacturers can only design and produce closed towers based on engineering experience, lack of verification process, and there is no data to prove whether the closed tower can meet the cooling task or whether design standards can be met. [0004] Especially for the elliptical tube closed cooling tower, there is even a lack of mature check calculation process. [0005] Traditional closed-loop thermal analysis focuses on heat transfer calculations. [0006]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28C1/14
CPCF28C1/14F28F2200/00
Inventor 赵元宾李慧杨玉杰
Owner 济南蓝辰能源技术有限公司
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