loading

Professional manufacturing and production of radiator cooling fans, condenser fans and fan motors, etc.

How to calculate the air volume of the cooling fan required by the product

For customers, manufacturers are obliged to assist them in how to choose a cooling fan with appropriate air volume. Now the calculation method of air volume demand is introduced as follows: 1. First, some known conditions must be understood: The card is equal to g weight ℃ water to make it The heat required for a temperature rise of °C. The power of watts is equal to Joule per second. , Calorie equals to .joule, air constant pressure (mmAq) specific heat (Cp)u003d.(Kcal/Kg℃), standard state air: humid air with temperature ℃, atmospheric pressure mmHg, humidity% is standard air, and the unit is at this time The weight of volumetric air (also known as specific weight) is g/M*. CMM and CFM refer to the volume of air discharged per minute. The unit of the former is cubic meter/minute; the unit of the latter is cubic feet/minute. CMMu003d.CFM. 2. The formula is calculated and learned: the total heat output of the fan (H) u003d specific heat (Cp) × weight (W) × allowable temperature rise of the container (△Tc)    because: weight W u003d volume between units (per second) multiplied by Density is also: weight Wu003d(CMM/) ×D, which is: weight Wu003d(CMM/)•g/M*, which is: weight Wu003d(Q/) ×g/M* Therefore: total heat (H) u003d.(Q/) •g/M*•△Tc, electrical heat (H)u003d( P[power] t [sec] )/., from one and two: .(Q/) •g/M *•△Tcu003d(P•t)/. Solution: Qu003d(P×)/•.•.•△Tc Solution: Qu003d.P/△Tc…………………………… ………………… (CMM) Solution: Qu003d.•. P/△Tcu003d. P/△Tc……………………(CFM), converted to Fahrenheit (temperature difference per degree Celsius) Equal to. Fahrenheit temperature) is: Qu003d.•. P/△Tfu003d. P/△Tf……………………(CMM) Qu003d.•. P/△Tfu003d. P/△Tf… ………………………(CFM) 3. Example Example 1: A computer consumes watts of power and a fan consumes watts. When the summer temperature is the highest, the CPU is allowed to work at ℃, and the fan air volume is required. The calculation is as follows: Pu003dW+Wu003dW; △Tcu003du003d Qu003d.×/u003d.CMMu003d.CFM (air volume required for work) Example 2: A SWITCHING power supply consumes power watts, a fan consumes watts, local The highest temperature in summer is ℃, and the supply is allowed to work at ℃. The required fan air volume is calculated as follows:   Pu003dW+Wu003dW; △Tfu003du003d  Qu003d.×/u003d.CMMu003d.CFM (air volume required for work) In this way, the main parameter of the air volume of the cooling fan required by the product can be confirmed, and then the cooling fan that fits the customer's product can basically be selected through other parameters. (Recommended reading 'Introduction to Wind Tunnel Laboratory and How to Choose a Cooling Fan')

GET IN TOUCH WITH Us
recommended articles
knowledge Info Center
Many of our low-demand customers often go to the electronics market or the so-called wholesale department to buy cooling fans.

Automobile radiator fan factory is a cooling fan manufacturer integrating Ru0026D, production and sales.
Recently, we dealt with a case of changing the installation method of the cooling fan, which has a great impact on the cooling fan.

During normal use of any electronic product, due to the effect of current, there will be varying degrees of temperature rise inside the device, and when the temperature rise of the device exceeds a certain range, its life will be attenuated to varying degrees (for a long time, The safety of equipment operation will also be reduced).
Car cooling fan working position and its principle: cooling fan working principle 1.

The comprehensive laboratory of the automobile radiator fan factory has introduced new equipment-the thermal shock test box.
The commonly used cooling fan voltage is generally 12V, but some customers' products, such as temperature-controlled cooling fans, set a lower voltage for the cooling fan at low temperatures.
When we choose a cooling fan, especially for certain voltages that are not very stable or have several different voltage gears for speed adjustment, we need to understand the voltage range of the cooling fan, such as a cooling fan that works with a 12V DC voltage.
no data
Ready to work with us ?
Find us here: 
After nearly 20 years of hard work, the factory has grown from an unknown family workshop to an industry leader with a complete management system and independent research, development and manufacturing capabilities.
Contact us
Tel: +86 - 576-8625 9388 
Fax: +86 - 576 - 8625 9008

Address:
No. 58-11, Jintang North Road, East Wenling New District, Taizhou City, Zhejiang Province, China
Copyright © 2025 TONGCHI | Sitemap| Privacy Policy
Customer service
detect