What are Fan Laws and how do you use them in thermal management design?

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.  Fan Laws are useful mathematical tools to understand, compare and contrast different fan approaches.  Using Fan Laws before choosing a fan can help engineers to make solid choices to reduce cost, experimentation and time to market.  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:

[slideshare id=4205722&doc=atsslidecastfanlaws-100521141058-phpapp02]

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