不锈钢通风管道中的噪声吸收！
不锈钢通风管道内的噪声和安静影响吸声管道内衬。每英尺管道长度的分贝是直接测量的，使用扬声器作为声源，为各种形状和大小、不同频率的有内衬和无内衬矩形管道。衰减与管道截面大小和吸收系数之间的关系更接近于Sivian的理论公式，而不是其他已经提出的公式。测量还通过连接到5000 CFM容量风机系统的噪声进行。原来噪音是由……引起的。与风扇叶片产生的可忽略不计的噪音相比，有内衬和无内衬的空气对管道内壁产生的摩擦速度可达每分钟1500英尺。通过引入一种特殊的挡板结构，测试了静压和空气阻力流动系统的效果。对于有内衬管道和无内衬管道，吸收摩擦阻力也是一样的。
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.
当风管与外部风管并列使用时，可使用轮式换热器。轮子的一半在一个管子里，一半在另一个管子里。当轮子旋转时，位于加热管中的轮子部分加热多孔的轮子结构。位于冷却管中的轮毂部分从多孔轮毂结构中去除热量。轮子也可以用干燥剂处理，这样水就可以从一条小溪流到另一条小溪。
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.
车轮没有完全密封，车轮本身的体积从一根管道泄漏到另一根管道。因此，需要在流之间进行零转移(交叉污染)的应用程序不能使用轮子。车轮需要并排和相同尺寸的管道，限制了许多应用程序所需的包装自由。后但并非不重要的是，轮子是带有马达、皮带、滑轮、轴承等的主动运动机器，需要高技能的维护人员来保持轮子的转动
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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