Talk about how to control the air supply setting of the air duct

Bag air duct system, also known as fabric fiber duct or cloth bag air duct, is a type of air supply terminal device made of special fabric that integrates air transmission and distribution. Fresh air passes through fiber pores or small openings. The hole spreads from the inside of the cavity to the room. Compared with the conventional air supply system, the bag air duct system has the characteristics of easy cleaning, large air outlet area, light weight, simple construction and short cycle. At the same time, it can also solve problems such as cold air feeling and surface condensation that are easy to appear in low-temperature air-conditioning systems. At present, cloth bag air duct systems are increasingly used as air supply terminal devices in various large-scale places to improve indoor air quality. In recent years, scholars at home and abroad have conducted certain studies on the air flow field, temperature field, pollutant concentration distribution and human thermal comfort in air-conditioned rooms based on the bag duct system. The distribution characteristics of indoor air under air supply devices such as bagged air duct systems and diffusers and the degree to which people are affected in a polluted environment are studied. The experimental research results show that the air supply mode based on bagged air duct systems can create a good indoor environment. The air quality has a low sense of blowing on the human body and can reduce the possibility of people being affected by the secondary influence of polluted air. So, what effect does the air supply volume have on the air supply characteristics of the bag air duct? The influence of the air supply volume on the surface air velocity and the inside of the cavity of the bag air duct system during the air supply of the permeable bag air duct system is studied through field experiments. The influence of the axial air pressure distribution draws the following conclusions: (1) The 'self-rectifying' effect of the permeable bag duct system on the air is basically independent of the air supply volume, but the surface air velocity increases with the air supply volume. Increase, the relationship between the two is approximately linear. (2) With the increase of air supply, the total air pressure and static pressure in the cavity of the permeable bagged air duct system gradually increase, and the gradient of static pressure increase and dynamic pressure attenuation gradient becomes larger and larger, and the static pressure at the end recovers. The phenomenon becomes more obvious.

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