Page 4 - Catalogue
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PRODUCT SELECTION GUIDELINES
A. HOW TO CHIOCE AIR FLOW
In order to take away the heat generated by the system or air exchange, it is important to use
the fan forced ventilation and select the suitable wind turbine in the system design stage.
Should refer to the application environment of the wind power supply, operating conditions,
temperature, humidity, corrosion, fan control characteristics, noise, air pressure, wind, etc..
For the use of the fan forced cooling, according to the heat generated by the system and the
need to maintain the temperature of the system to do as follows。
Heat Exchange Unit Calculate the required air
Quasi selec ng fan
Q=2.99*W/Tc
Air out WATTS Air in
W: Heat dissipated in watts
System working TC: Allowable temperature rise in °C
B. HOW TO CHOICE FAN’S PRESSURE
The customer fan application system has resistance, which is called wind resistance. Wind
resistance is objective.It will change the corresponding relationship between the air volume
and the air pressure of the fan in the application system. In engineering, we usually draw.The
wind resistance curve of customer system and the wind pressure curve of fan volume (P-Q
diagram) are intersected by two curves Point as a reference for selecting fan pressure.
Wind age curve of system
Wind age curve of system
Working Point
M
Fan P-Q
When customer choice the fan,Refer the volum of point M.
（Note：Select the fan whose curve is red to operate in the customer's system. The valid parameter is only the value of point M）
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