The fabric air duct system, also known as fabric fiber duct or fabric bag air-supply duct, is a kind of air distribution device that integrates air transmission and distribution at the air-supply end made of special fabric. Fresh air diffuses into the room through fiber holes or small holes set up in the cavity.
Compared with the conventional air-supply system, the fiber fabric air duct system has the characteristics of easy cleaning, large air outlet area, light weight, simple construction, and short construction cycle. At the same time, it can also solve the problem of cold air and surface condensation that often occurs in low-temperature air conditioning systems.
At present, fabric air duct systems are increasingly used as air-supply end devices in various large venues to improve indoor air quality.
In recent years, many scholars have conducted research on the air flow field, temperature field, pollutant concentration distribution, and human thermal comfort based on fabric duct systems in air-conditioned rooms.
The indoor air distribution characteristics and the degree to which people are affected in a polluted environment were studied based on the cloth air duct system, diffuser and other air-supply devices.
The experimental research results show that the air-supply mode based on the fabric duct system can create good indoor air quality, reduce the feeling of blowing on the body, and reduce the possibility of secondary impact of polluted air on people.
Through on-site experiments, the following conclusions were drawn on the influence of air supply volume on the surface air flow velocity and the axial air pressure distribution inside the cavity of the permeable and leaky fabric duct system during air supply:
The "self-rectification" effect of the permeable and leaky fiber fabric air duct system on the air is basically independent of the air supply volume, but the surface air flow velocity increases linearly with the increase of air supply volume.
With the increase of air supply volume, the total air pressure and static pressure inside the permeable and leaky fabric duct system gradually increase, the static pressure increase gradient and dynamic pressure attenuation gradient become larger and larger, and the static pressure recovery phenomenon at the end becomes more significant.
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