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High-efficiency low-temp. water discharge method for crossflow cooling tower

A technology of outlet water temperature and cross-flow type, applied in the direction of water shower cooler, direct contact heat exchanger, heat exchanger type, etc., can solve the problem of increased failure rate of refrigerator operation, increased exhaust air volume of cooling tower, and reduced safety factor and other issues, to achieve the effect of improving the comprehensive energy saving effect, reducing the operating current and reducing the failure rate

Inactive Publication Date: 2005-05-04
南京深度节能技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The cooling water enters the refrigerator at 32°C, and the exhaust pressure of the refrigerator is high during operation (the cooling water temperature drops by 1°C, and the exhaust pressure drops by 0.05Mpa), and the operating current is large, which increases the failure rate of the refrigerator and reduces the safety factor
[0009] In addition, the selection of the motor of the existing cooling tower is required to comply with the national standard GB7190.1-1997, which stipulates that the measured power consumption ratio is not greater than 0.06KW / (m 3 / h), for other types of towers not more than 0.04KW / (m 3 / h), which has a limiting effect on the improvement of the exhaust air volume of the cooling tower

Method used

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  • High-efficiency low-temp. water discharge method for crossflow cooling tower
  • High-efficiency low-temp. water discharge method for crossflow cooling tower
  • High-efficiency low-temp. water discharge method for crossflow cooling tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Choose the Sino-US joint venture Marley SC-150L tower type, and assemble every 4 sets into a cooling tower of the model TSC-500ML (see Figure 1). A total of 6 sets of TSC-500ML cooling towers are assembled and improved at the same time:

[0027] 1. Change the power of cooling tower fan 3 from 5.5kw to 7.5kw, increase the angle of fan blades, and increase the total exhaust air volume from 330000M 3 / h, increased to 440000M 3 / h or so. Increase the exhaust air volume by 33%. Make the pressure drop between the inlet and outlet of the heat sink in the cross-flow cooling tower reach 5-50 mm water column.

[0028] 2, the filler 1 in the above-mentioned cooling tower (it is positioned at both sides in tower body 2) widens 10% (total filler is greater than 20% when adding combination), filler 1 area increases about 40% than rated area.

[0029] 3. Since the area of ​​the air inlet of the cooling tower increases by 20%, and the air intake is greater than 20% of the rated amou...

Embodiment 2

[0035] Choose the Sino-US joint venture Marley SC-150L tower type, and assemble every 4 sets into a cooling tower of the model TSC-500ML (see Figure 1). A total of 6 sets of TSC-500ML cooling towers are assembled and improved at the same time:

[0036] 1. Change the power of cooling tower fan 3 from 5.5kw to 9kw, increase the angle of fan blades, and increase the total exhaust air volume from 330000M 3 / h, increased to 528000M 3 / h or so. Increase the exhaust air volume by 60%, so that the pressure drop between the inlet and outlet of the heat sink in the cross-flow cooling tower reaches 500-1000 mm water column, which increases the kinetic energy of water evaporation, reduces the gravitational force of water molecules, and accelerates the speed of water evaporation and strength. Its operating efficiency table is shown in Table 3.

Embodiment 3

[0038] Choose the Sino-US joint venture Marley SC-150L tower type, and assemble every 4 sets into a cooling tower of the model TSC-500ML (see Figure 1). A total of 6 sets of TSC-500ML cooling towers are assembled and improved at the same time:

[0039] 1. Change the cooling tower fan 3 to a high-efficiency impeller scroll type high-pressure fan with a power of 10kw and a total exhaust air volume of 330000M 3 / h, increased to 594000M 3 / h or so. Increase the exhaust air volume by 80%, so that the pressure drop between the inlet and outlet of the heat sink in the cross-flow cooling tower reaches 1500-1900 mm water column, which increases the kinetic energy of water evaporation, reduces the gravitational force of water molecules, and accelerates the speed of water evaporation and strength.

[0040] 2, the filler 1 in the above cooling tower is increased by 10%, widened by 80%, (total filler is greater than 20% when adding combination), and the area of ​​filler 1 is increased by...

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Abstract

The invention relates to a high-efficiency method for reducing the outlet water temperature of a circulating water cross-flow cooling tower. By increasing the fan motor power of the cross-flow cooling tower, the exhaust volume of the cross-flow cooling tower is increased by 30-80%, so as to reduce the temperature in the tower. Negative pressure makes the pressure drop between the inlet and outlet of the heat sink in the cross-flow cooling tower reach 5-2000 mm water column, increasing the evaporation kinetic energy of water. In the present invention, the width and / or height of the filler in the cross-flow cooling tower can be increased to increase the heat transfer area by 30-80%, so as to lengthen the water cooling process and further increase the cooling range. The method of the invention can improve the refrigeration efficiency of the cooling tower, prolong the service life of the refrigerator, and can inhibit the reproduction of legionella, and the effect is very ideal.

Description

technical field [0001] The invention relates to a method for reducing the outlet water temperature of an industrial circulating water cooling tower, in particular to a method for reducing the outlet water temperature of a cross-flow cooling tower with high efficiency. Background technique [0002] Regarding the cooling effect of circulating water in the cooling tower, in 1925 someone first explained the operation mechanism of the cooling tower, and it became the theoretical basis for most people to analyze the operation of the cooling tower. But this theoretical basis ignores water evaporation. In 1983, the heat transfer mass in the cooling tower was strictly deduced, and a new cooling tower operation theory was determined, mainly due to the evaporation and heat dissipation of water and the heat exchange when water contacts with air, and the latent heat of vaporization of water can cool the circulating water , in addition to three forms: [0003] 1. When the air temperatur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28C1/04
Inventor 蔡春余
Owner 南京深度节能技术有限公司
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