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Reinforced tube type indirect evaporation cooler heat exchanging tube outer heat and mass transfer method

An evaporative cooler and heat exchange tube technology, which is applied in heat exchange equipment, lighting and heating equipment, textiles and papermaking, etc., can solve the problems of deformation and decay of fiber sleeves, inconvenient replacement of fiber sleeves, and high requirements for fiber sleeve production processes. To achieve the effect of improving hydrophilicity, increasing the evaporation area outside the tube, and high heat and mass exchange efficiency

Inactive Publication Date: 2009-01-28
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the production process of the fiber sleeve is high, and it is not convenient to replace the new fiber sleeve after the fiber sleeve is deformed and rotted after running for a period of time.

Method used

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  • Reinforced tube type indirect evaporation cooler heat exchanging tube outer heat and mass transfer method
  • Reinforced tube type indirect evaporation cooler heat exchanging tube outer heat and mass transfer method
  • Reinforced tube type indirect evaporation cooler heat exchanging tube outer heat and mass transfer method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Choose rutile titanium dioxide with a particle size of 80-90nm, add it into distilled water to make a suspension with a volume concentration of 10%, add dispersants sodium hexametaphosphate, SiO 2 And cross-linking agent polyethylene glycol diacrylate, the amount of sodium hexametaphosphate added is not more than 1% of the total mass of the dispersion, SiO 2 The amount added is 10% of the total mass of the dispersion liquid, and the amount of polyethylene glycol diacrylate added is no more than 1% of the total mass of the dispersion liquid. Mix and stir, and adjust the pH value of the mixed liquid to 9, and then mix The solution was placed in an ultrasonic cell pulverizer for ultrasonic dispersion for 40 minutes, and the ultrasonic power was controlled at 630W to obtain nano-TiO 2 Hydrophilic dispersion.

[0054] Immerse the Coolplus fiber fabric in the prepared nano-hydrophilic dispersion for 40 minutes, take it out, and then dry it at 50°C to 90°C for 20 minutes.

...

Embodiment 2

[0060] Choose rutile titanium dioxide with a particle size of 80-90nm, add it to distilled water to make a suspension with a volume concentration of 8%, add dispersants sodium silicate, SiO 2 and FH-α cross-linking agent, the amount of sodium silicate added does not exceed 1% of the total mass of the dispersion, SiO 2 The amount added is 40% of the total mass of the dispersion, and the amount of FH-α cross-linking agent added is no more than 1% of the total mass of the dispersion, mixed and stirred, and the pH value of the mixed liquid is adjusted to 10, and then the mixed liquid Put it into an ultrasonic cell pulverizer for ultrasonic dispersion for 20 minutes, and control the ultrasonic power to 450W to obtain nano-TiO 2 Hydrophilic dispersion.

[0061] Immerse 100% stainless steel metal fiber strips in the prepared nano-hydrophilic dispersion liquid for 35 minutes, take it out, and then dry it at 50° C. to 90° C. for 50 minutes.

[0062] Use aluminum foil heat exchange tu...

Embodiment 3

[0067] Choose rutile titanium dioxide with a particle size of 80-90nm, add it to distilled water to make a suspension with a volume concentration of 12%, add dispersants ethylene glycol, SiO 2 and FH-α cross-linking agent, the amount of sodium silicate added does not exceed 1% of the total mass of the dispersion, SiO 2 The amount added is 20% of the total mass of the dispersion, and the amount of FH-α crosslinking agent added is no more than 1% of the total mass of the dispersion, mixed and stirred, and the pH value of the mixed liquid is adjusted to 10, and then the mixed liquid Put it into an ultrasonic cell pulverizer for ultrasonic dispersion for 30 minutes, and control the ultrasonic power to 500W to obtain nano-TiO 2 Hydrophilic dispersion.

[0068] Immerse the metal fiber sintered felt in the prepared nano-hydrophilic dispersion liquid for 35 minutes, take it out, and then dry it at 50° C. to 90° C. for 30 minutes.

[0069] Use aluminum foil heat exchange tubes, wash ...

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Abstract

The invention relates to a method for the external heat and mass transfer of an enhanced tube type indirect evaporative cooler heat exchange tube. The method firstly prepares nanometer TiO2 hydrophilicity dispersion liquid, high water absorbability fabric or metal fabric is selected as a cladding material, the arrangement is performed to the cladding material by using the nanometer hydrophilicity dispersion liquid, and then the cladding material is wound outside a heat exchange tube in a screw way, at last, the nanometer hydrophilicity dispersion liquid is processed on the heat exchange tube behind the cladding material, to ensure the uniform film forming. The method enables the hydrophilicity of a heat exchange tub aluminum foil material to be improved through changing the surface property of the tube type indirect evaporative cooler heat exchange tube, thereby ensuring that a uniform thin water film can be formed outside the heat exchange tube, improving the evaporative efficiency of the water on the heat exchange tube, and ensuring that the reduced temperature effect of the tubular type indirect evaporative cooler to be enhanced.

Description

technical field [0001] The invention belongs to the technical field of heat and mass exchange, and in particular relates to a method for enhancing heat and mass transfer outside a heat exchange tube of a tubular indirect evaporative cooler. Background technique [0002] In the tube-type indirect evaporative cooler, the processed air and the processed air are separated by heat exchange elements, that is, primary air and secondary air. By spraying circulating water, a layer of water film is formed on the surface of the element on the secondary air side. The evaporation of the water film is completed by absorbing heat, so that the temperature of the water film is maintained at a temperature close to the wet bulb temperature of the secondary air. The primary air passes through the heat exchange element, The water film transfers heat to the secondary air to achieve the purpose of cooling. In this process, the situation on the secondary air side is the same as that of direct evapo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F23/00D06M11/46D06N7/06
CPCY02P70/62
Inventor 黄翔樊丽娟谭艳君文力汪超
Owner XI'AN POLYTECHNIC UNIVERSITY
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