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UNDERBYTE · 12-14-2005, 10:59 AM

$$$$my question was: if measuring the differential air pressure (in 1/4" plenum to ambient/rad backside), will that nominally equate to a point on the fan's PQ curve ?
Today 09:45 AM$$$$

Generally they only match about half the time ( within 5% or less) the other half of the time +/- 5-10% Rarely do I get a spot on match from a system/PQ curve

occaisionally I have had radiator fin configurations that straighten the flow in an optimal sense and in so doing actually increase flow as much as 10% and others as much as 10% less than the system point.

When you add a radiator to a fan, in a sense it becomes a diff. fan with pos-neg. or minimal effect.

Probably close enough -

12-14-2005, 10:59 AM	#36
UNDERBYTE Cooling Neophyte Join Date: Oct 2002 Location: CENTRX Posts: 75	Re: Performance Vs Noise - Experimentation $$$$my question was: if measuring the differential air pressure (in 1/4" plenum to ambient/rad backside), will that nominally equate to a point on the fan's PQ curve ? Today 09:45 AM$$$$ Generally they only match about half the time ( within 5% or less) the other half of the time +/- 5-10% Rarely do I get a spot on match from a system/PQ curve occaisionally I have had radiator fin configurations that straighten the flow in an optimal sense and in so doing actually increase flow as much as 10% and others as much as 10% less than the system point. When you add a radiator to a fan, in a sense it becomes a diff. fan with pos-neg. or minimal effect. Probably close enough -