[Did You Know About Cooling?] How do you determine the appropriate rotational speed for a cooling fan?
Category:
Industry Trends
Release time:
2019-05-23
Cooling fan It is typically divided into the following three categories:
1. Axial-flow: The direction of the airflow at the outlet is the same as the axis direction.
2 Centrifugal: Utilizes centrifugal force to fling the airflow outward along the blades.
3. Mixed-flow: Combines the two airflow patterns mentioned above.
Rotational speed refers to the rate at which a fan rotates, typically measured in the number of revolutions per minute, or rpm. The rotational speed is influenced by factors such as the number of windings in the electromechanical coil, wire diameter, outer and inner diameters of the fan blade impeller, blade shape, and the type of bearing used. As the rotational speed increases, the airflow volume also increases accordingly.
The magnitude of the rotational speed to some extent reflects the airflow volume. Under constant conditions, the higher the rotational speed, the greater the noise and vibration will be. Therefore, provided that the airflow volume meets the cooling requirements, it is advisable to use fans with lower rotational speeds whenever possible. Typical rotational speed ranges (taking DC axial-flow fans as an example): - 2510 fan: 7,000–12,000 rpm; - 3010 fan: 5,000–9,000 rpm; - 4010 fan: 5,000–7,000 rpm; - 5010 fan: 3,500–5,000 rpm; - 6025 fan: 2,600–4,500 rpm; - 7025 fan: 2,400–3,600 rpm; - 8025 fan: 2,000–3,500 rpm; - 9225 fan: 1,600–3,100 rpm; - 12025 fan: 1,500–2,500 rpm; - 12038 fan: 2,000–3,200 rpm. Fan rotational speed can be tested either through BIOS during computer startup or via monitoring software included with the motherboard; alternatively, it can also be measured using a dedicated tachometer. Note: The first two methods can only yield accurate readings if the fan supports speed measurement functionality.
Shenzhen Jiangshanlai Electronic Technology Co., Ltd. was founded in 2005 in Shenzhen, China. It is a large-scale enterprise integrating customization, R&D, manufacturing, sales, and service of DC brushless motors, DC cooling fans, DC brushless fans, DC stand fans, boosted cooling fans, miniature cooling fans, DC cooling fans, DC blowers, and non-standard fans. We are a wholesale manufacturer and supplier of DC fans. Our products are best-selling in Guangdong Province—including Shenzhen, Guangzhou, and Dongguan—as well as in Fujian, Zhejiang, and Jiangsu provinces.
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