Tony Koryban’s mail bag archive today addresses a problem whereby the engineer only needs it to go full blast when the room temperature goes over 40ºC. Here’s the question:
I don’t need it to run at full capacity. I only need it to go full blast when the room temperature goes over 40ºC. Maybe I could put in a speed controller to slow the fan down when I don’t need all that air, and a thermal sensor to tell it to speed up again if the room gets hot. Slowing the fan down will definitely make it quieter. Before I do that, is there a way I can calculate the new operating point at reduced fan speed? And how much does the audible noise go down with reduced fan speed?
And Tony has his usually full, practical and humorous answer of course. Read Tony’s solution to this fan fun at Tony Koryban’s Mail Bag Archive.
During a product’s life cycle a redesign may be carried out which replaces older components with new, higher powered ones. Due to the resulting higher heat flux, increased thermal management is often needed to maintain adequate component junction temperatures and reduce temperature rise within the system.Â Fan Laws are useful mathematical tools to understand, compare and contrast different fan approaches.Â Using Fan Laws before choosing a fan can help engineers to make solid choices to reduce cost, experimentation and time to market.Â ATS’s five-page presentation on Fan Laws for thermal management which includes examples on how to use them, is a good introduction to this important engineering tool:
ATS, Inc. is announcing a new “on-demand” webinar from our thermal engineering team, “Methodologies for Fan Characterization”. This webinar is ready for download and listening 24 hours day from the ATS web site.
Topics covered include:
- What are the fan types and points of application?
- Understanding how fans operate and the effect of bypass flow on their operation
- Fan selection
- Fan assemblies and their implementation
- Use of fan laws for sizing
- Managing acoustic noise
- Fan characterization
To take part in this webinar, just click to our site to reach the webinar at: Methodologies for Fan Characterization