And we come to the finale, in which we’ll look at the extremely popular line graphs that express the relationship between airflow and static pressure. These present, in a sophisticated and seemingly credible way, which fan will be more effective in which environment. As it happens, however, it is mainly a marketing tool rather than something useful that can really be relied upon. Read more “Static pressure vs. airflow, part 3/3: P/Q curves are misleading”
No one, no one at all, can claim based on any tests that one fan is a touch more or less efficient than the other for radiators or cooler heatsinks in general. Technically it’s impossible, and not just because of the huge design diversity of fins. However, after in-depth analyses, one can work one’s way to comparisons that have a high predictive value with a certain amount of universality. Read more “Static pressure vs. airflow, part 2/3: Measuring performance on fins”
Fan marketing materials could not do without the use (or is it misuse?) of key variables. There are plenty of them everywhere, but no one anywhere explains the nature of how they work, always just the supposed consequence. After all, for expected sales, companies need you to understand their presentations, which often contradict the laws of physics. But we will take a look at them, in all simplicity. Read more “Static pressure vs. airflow, part 1/3: Quantities under control”
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