三、一面靠墙的排气罩(一)概述众所周知,一个排气罩靠墙放置,它的效率就会提高。试验设备见图34。排气罩和污染源长边靠墙,烟管放在纸箱最不利一侧。侧向风由右吹向左端,被认为是最不利风向,本试验是为了比较带法兰边和不带法兰边时的风力作用下的效率。试验步骤同前。 Third, a wall exhaust hood (a) Overview As we all know, a hood placed against the wall, its efficiency will increase. The test equipment is shown in Figure 34. The exhaust hood and the long side of the pollution source are against the wall and the smoke tube is placed on the most unfavourable side of the carton. The lateral wind blowing from the right to the left is considered to be the most unfavourable wind direction. This test is to compare the efficiency of the wind with the flanged edge and the flangeless edge. The test procedure is the same as before.