When judging something, it will always be measured by its extreme value. In the large number of market applications of fabric air ducts, a problem arises spontaneously, how far can fabric air ducts be sent? In people's general understanding, the greater the wind speed, the farther the wind supply distance.


Generally, the limited noise allowance of the air conditioning system in the air conditioning room is controlled between 40 and 50dB(A), that is, the corresponding NR(or NC) number is 35 to 45dB(A). According to the design specification, the main wind speed of the traditional iron sheet air duct that meets the noise allowance in this range is 4 ~ 7m/s, and the wind speed of the branch pipe is 2 ~ 3m/s. For places without noise restrictions, the wind speed can be increased appropriately. Because of its flexible material, the noise generated during air supply is small, and the wind speed inside the pipe can be much larger than that of the iron duct.


The wind speed in the fiber fabric duct is related to the static pressure inside the pipe, the wind pressure of the duct is determined by the static pressure of the indoor machine, also known as the residual pressure outside the machine, when the static pressure and the wind speed do not match, the duct may shake (the greater the wind speed, the smaller the static pressure, the more severe the shake), thus affecting the actual air supply effect. Therefore, when designing the air duct, the wind speed in the pipe should not be too large to avoid converting the static pressure into dynamic pressure, causing the static pressure to be too small and causing the shaking of the air duct. The main wind speed in the pipe is generally 8~10m/s, and the branch pipe is 6-8m/s. Generally speaking, the higher the static pressure value, the further the air supply distance.


In addition, the air supply distance is also related to the tuyere, and the tuyere layout needs to comprehensively consider the indoor air flow organization, noise, aesthetic requirements of building decoration, installation and maintenance, and economic factors. In the selection, the tuyere wind speed should be determined, the tuyere air volume, effective area, and installation should be calculated, and special attention should be paid to the influence of building beams or columns on the air flow. For some air conditioning areas with special technical requirements and large air volume occasions, the selection of tuyere should be supplemented by computer simulation (CFD) method.


There are several types of fabric air ducts:


The E jet nozzle air supply is the most distant form of air supply, and the nozzle diameter in the ventilation system is 40mm-100mm. The nozzle is mainly used in the environment where the air supply outlet has a large distance from the activity range of personnel, when public places such as various halls and assembly workshops. In actual use, the size should be selected according to the need. The diameter of the nozzle determines the speed and amount of air supply, the larger the diameter, the larger the air supply, the farther the air supply distance. The injection distance is related to many factors such as its caliber and injection pressure. Generally speaking, the larger the diameter of the ball jet tuyere, the higher the injection pressure, the farther the injection distance, in the case of a certain wind speed and pressure, the jet nozzle can reach a maximum of 45 meters of air supply distance, and the end wind speed of 0.2m/s.


Under the premise of determining the air volume, the form, size and position of the tuyere affect the distribution of air flow.

 

Medical meteorology research has also shown that the most comfortable bed climate is 0.2 meters per second of microairflow. Such a small wind speed, almost no sense of wind to the human body.


However, there are also some people who want to blow the cold air directly on their face, feel that is the real effect. Scientific experiments have shown that this is an unhealthy way to live. All pleasure, no comfort.


Conclusion: The air supply distance of fabric air duct is closely related to the air volume of equipment, wind pressure, pipe tuyere and applicable environment, and the distance sent is not the final evaluation standard, but the most important is suitable, in the final analysis, in order to adapt to the use of places. MX fabric air duct can adjust the air supply distance and wind speed according to the different use places to meet the needs of customers. For more information, call 400-836-9929.