Cold air volume of the tower is what decisions?

Small make up will tell you about today to the question of the fan and the air volume air cooling tower fan and the air volume is very exquisite, like the size of the fan blade is on the fan efficiency has a great influence, it will also directly affect the intensity of the vortices around the blade, which will affect the efficiency of the fan. Small make up will tell you about what affects the efficiency of the cooling tower. Tests show that the fan blade material, the noise has a certain degree of influence. For example: cast aluminum blade blade noise than stamping steel plate; Nylon leaf blade noise than the metal. Generally speaking, the greater the loss coefficient of materials, the noise is smaller. Increasing the fan blade number, under the condition of rotating speed is constant, increases the air volume of fan. Or in obtain under the premise of the same air, can reduce the speed of the fan, so as to reduce the fan noise. But increased leaf number above 6, leaf number, air volume increase is limited, and often have a negative effect on noise reduction features. Wide hakaze at low speed and high-speed narrow hakaze fan under the condition of the same volume, the former than the latter resulting low noise sound pressure level 4 db ( 一) And the power consumption to reduce 27%. Narrow fan and protects the clearance of the solar or lunar halo, prevent turbulence, can reduce the fan noise. Tests show that when the gap is zero, air volume increased by 27%, and the noise down 3 db ( 一) , reduce speed to make air flow back to the original level, noise and could drop by 2 db ( 一) 。 Cooling tower fan and take away the heat, the atmosphere, if the fan air volume is insufficient, will inevitably lead to the problem of insufficient cooling effect. Empty give said, tell you a trick, try, for counterflow cooling towers, calculates the cross sectional area first, and then multiplied by 2. 7, and then multiplied by 3600 will need to come to the airflow. Then you buy a wind meter and to measure the outlet, will understand if you don't have enough air in the cooling tower. Such as a head of 3 meters, 3 meters wide of the cooling tower, the required air volume is about 3 times; 3倍; 2. 7倍; 3600 = 87480 cubic meters per hour. There is a problem need to note that the outlet wind meter in measuring wind speed, close to the wind are compared. in air volume is big, close to the center wheel, there is no wind. Axial flow fan for no reason. This time need to measure from the center of the wheel hub to the several points are compared. in the wind, and then points to calculate the air volume, so that accurate.

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