1. In terms of planning and layout, low-space site planning and design: it is recommended to arrange along walls, beams and columns to save space and improve aesthetics. Planning and design of tall and large spaces: Considering the coordination of air duct layout and return air, try to use straight ducts to improve indoor airflow organization. 2. In terms of size selection, since the selection of the diameter of the bag air duct system is related to the wind speed and static pressure in the pipe, when the static pressure in the pipe and the wind speed do not match, the air duct may shake, which will affect the actual air supply effect. When the wind speed is larger, the static pressure is smaller, and the shaking is more severe. Moreover, excessive wind speed will also increase the noise generated by the system. Determine the diameter according to the air volume and system inlet air speed: calculation formula: Gu003d 3600v•л•D2 /4 where G: air volume of a single system (m3/h), v: system inlet air speed, D: system diameter (mm) control bag Air velocity at the inlet of the duct system: In order to avoid jitter and negative pressure at the inlet of the system. Under normal circumstances, we determine the diameter of the pipe according to the wind speed of 8~9m/s according to the air volume. 3. In terms of air supply pressure, the pressure in the bag air duct system can be composed of three parts: static pressure, dynamic pressure, and resistance loss along the way. The main role is the direct relationship between the recovery of static pressure and the resistance loss along the way. In most cases, the pressure value of the static pressure in the straight pipe of the bag air duct system obtained by static pressure recovery is greater than the pressure value of the resistance loss along the way. End static pressure u003d inlet static pressure + static pressure recovery - pressure loss (Pru003dPs+Prs-Pz) The average pressure in the pipe is the average of the static pressure at the inlet and the static pressure at the end. If the pressure difference accounts for more than 10% of the inlet static pressure, a PAD pressure balance valve should be installed in the pipe to balance the static pressure in the entire pipe. After balance, the maximum pressure difference in the entire bag air duct system is 25Pa, and the ratio of the maximum pressure difference to the inlet static pressure is also less than 10%. For the inlet pressure of the complex system of the manifold, it can be calculated according to the resistance of the most unfavorable circuit, and the outlet pressure, the extension resistance of the main pipe and the branch pipe, and various local resistances should be considered at the same time. 4. In terms of air outlet design, it is generally designed by professional manufacturers to determine the air outlet method, opening size and number of rows. !
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