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An anti-condensation air supply device and realization method for the entrance section of a comprehensive pipe gallery

A technology of comprehensive pipe gallery and air supply device, which is applied in the direction of ventilation system, heating method, and prevention of condensed water, etc. It can solve the problems of high energy consumption, large consumables, and poor timeliness of defogging, etc., and achieve high processing efficiency, highly targeted effects

Active Publication Date: 2022-07-19
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The demisting and dehumidification method requires a large investment in equipment, and often requires additional energy to dehumidify or regenerate the hygroscopic agent. The operating energy consumption is high and the consumables are large; and the timeliness of demisting is not good.
Therefore, these methods cannot be used in the limited space of the integrated pipe gallery
[0005] According to the length of the fire compartment (generally 200m), the integrated pipe gallery is set with air inlet and air outlet respectively. Existing studies generally believe that the ventilation form of "one end of air intake and one end of exhaust air" is conducive to the discharge of humid air inside the integrated pipe gallery. Some projects The measure of "increasing ventilation to alleviate condensation" was adopted in the middle, but it resulted in the result of "more ventilation and wetter", which led to an increase in energy consumption of the ventilation system

Method used

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  • An anti-condensation air supply device and realization method for the entrance section of a comprehensive pipe gallery
  • An anti-condensation air supply device and realization method for the entrance section of a comprehensive pipe gallery
  • An anti-condensation air supply device and realization method for the entrance section of a comprehensive pipe gallery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] According to the actual situation, the size of the underground tunnel is 2800(x)×20000(y)×2800(z)(mm 3 ) numerical calculation model, the partition plates are arranged on both sides from the entrance of the pipe gallery along the x-axis at a distance of 400 mm from the side wall. For summer working conditions, the difference between the internal and external moisture content is 3.3g / kg (taking the outdoor parameters 32°C, 60%, and the indoor parameters 26°C, 70% as an example), and the total air supply volume after dehumidification on both sides is 784m3 / h, the material of the separator is made of stainless steel and set with a thermal insulation layer, and the heat flux is 0W / m 2 .

[0042] In order to verify the heat exchange effect between the air in the air supply duct and the air in the pipe gallery and the inner wall in this embodiment, the average turbulent energy model, that is, the standard k-ε two-equation model, is used to solve the equation system.

[004...

Embodiment 2

[0047] The same numerical calculation model as in Example 1 was established, and the difference between the internal and external moisture content was changed to 5.4 g / kg (taking the outdoor parameter of 33°C, 60%, and the indoor parameter of 26°C, 65% as an example). It is determined by simulation that the shortest length of the separator under Example 2 is 8.5m, Figure 8 It is the cloud map of the relative humidity distribution 0.5m behind the partition in the pipe gallery in the case of Example 2. It can be seen from the figure that the relative humidity is 72-80%, and no condensation occurs.

Embodiment 3

[0049] The same numerical calculation model as in Example 1 was established, and the difference between the moisture content inside and outside was changed to 7g / kg (taking the outdoor parameter of 35°C, 65%, and the indoor parameter of 26°C, 60% as an example). It is determined by simulation that the shortest separator length under Example 3 is 10.7m, Figure 9 It is the cloud map of the relative humidity distribution at 0.5 m behind the partition in the pipe gallery in the case of Example 3. It can be seen from the figure that the relative humidity is 74-79%, and no condensation occurs.

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Abstract

The invention discloses an anti-condensation air supply device at the entrance section of a comprehensive pipe gallery and a realization method, comprising an air supply device arranged on the equipment layer of the comprehensive pipe gallery and a partition plate arranged in the corridor, and the integrated pipe gallery is separated by the partition plate. The internal space is divided into a cable hole area and a ventilation hole area, and the upper part of the cable hole area and the ventilation hole area are respectively provided with a post-treatment air supply port and a direct fresh air supply port. The present invention is provided with an automatic adjustment device and an adjustment valve, and the automatic adjustment device can automatically control the opening and closing of each air duct adjustment valve and the dehumidifier according to the air conditions inside and outside the pipe gallery. By analyzing the temperature and humidity of the air inside the pipe gallery and the temperature and humidity of the outside air, according to the difference in moisture content and the wall temperature of the pipe gallery, when it is judged that the fresh air will reach the condensation condition after entering the pipe gallery, the dehumidifier will be activated, thereby effectively reducing the integrated pipe gallery. Risk of condensation in the inlet section.

Description

technical field [0001] The invention relates to the technical field of air supply, in particular to an anti-condensation air supply device for the entrance section of a comprehensive pipe gallery and a realization method thereof. Background technique [0002] Due to its advantages of effectively avoiding the repeated excavation of roads and efficiently utilizing urban underground space, the integrated pipe gallery has developed rapidly in my country. At the same time, the problems existing in its construction and operation have been paid more and more attention. The dew condensation problem area of ​​each cabin of the integrated pipe gallery, especially located in the middle and lower reaches of the Yangtze River and the coastal high humidity and heat climate in summer, is an urgent problem to be solved in ventilation design. [0003] The integrated pipe gallery project is generally located in the space below 2.5m from the ground. Due to being surrounded by rock and soil or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F7/06F24F3/14F24F11/72F24F11/88F24F11/89F24F13/22F24F110/20
CPCF24F7/065F24F3/14F24F11/72F24F11/88F24F11/89F24F13/22F24F2110/20F24F2013/221
Inventor 李炎锋田思楠许德胜杨泉刘爽田伟
Owner BEIJING UNIV OF TECH