不銹鋼通風管道中的噪聲吸收！
不銹鋼通風管道內的噪聲和安靜影響吸聲管道內襯。每英尺管道長度的分貝是直接測量的，使用揚聲器作為聲源，為各種形狀和大小、不同頻率的有內襯和無內襯矩形管道。衰減與管道截面大小和吸收系數之間的關系更接近于Sivian的理論公式，而不是其他已經提出的公式。測量還通過連接到5000 CFM容量風機系統的噪聲進行。原來噪音是由……引起的。與風扇葉片產生的可忽略不計的噪音相比，有內襯和無內襯的空氣對管道內壁產生的摩擦速度可達每分鐘1500英尺。通過引入一種特殊的擋板結構，測試了靜壓和空氣阻力流動系統的效果。對于有內襯管道和無內襯管道，吸收摩擦阻力也是一樣的。
The noise and quiet in stainless steel ventilation duct affect the liner of sound absorption duct. The decibel of pipe length per foot is measured directly. The loudspeaker is used as the sound source for rectangular pipes with and without linings of various shapes, sizes and frequencies. The relationship between attenuation and pipeline cross-section size and absorption coefficient is closer to Sivian's theoretical formula than other formulas that have been proposed. The measurement is also carried out through the noise connected to the 5000 CFM capacity fan system. It turned out that the noise was caused by the . Caused by. Compared with the negligible noise generated by fan blades, air with and without linings can produce friction speeds of up to 1500 feet per minute on the inner wall of pipes. By introducing a special baffle structure, the effects of static pressure and air resistance flow system were tested. For lined and non-lined pipes, the absorption friction resistance is the same.
當風管與外部風管并列使用時，可使用輪式換熱器。輪子的一半在一個管子里，一半在另一個管子里。當輪子旋轉時，位于加熱管中的輪子部分加熱多孔的輪子結構。位于冷卻管中的輪轂部分從多孔輪轂結構中去除熱量。輪子也可以用干燥劑處理，這樣水就可以從一條小溪流到另一條小溪。
Wheel heat exchangers can be used when air ducts are used side by side with external air ducts. Half of the wheel is in one tube and half is in another. When the wheel rotates, the part of the wheel in the heating tube heats the porous wheel structure. The hub part in the cooling pipe removes heat from the porous hub structure. Wheels can also be treated with desiccants so that water can flow from one stream to another.
車輪沒有完全密封，車輪本身的體積從一根管道泄漏到另一根管道。因此，需要在流之間進行零轉移(交叉污染)的應用程序不能使用輪子。車輪需要并排和相同尺寸的管道，限制了許多應用程序所需的包裝自由。后但并非不重要的是，輪子是帶有馬達、皮帶、滑輪、軸承等的主動運動機器，需要高技能的維護人員來保持輪子的轉動
The wheels are not fully sealed, and the volume of the wheels themselves leaks from one pipe to another. Therefore, applications requiring zero-transfer (cross-contamination) between streams cannot use wheels. Wheels need side-by-side and pipes of the same size, which limits the freedom of packaging required by many applications. Last but not least, wheels are active moving machines with motors, belts, pulleys, bearings and so on, requiring highly skilled maintenance personnel to keep the wheels turning.
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