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On Mon, 08 May 2006 09:29:39 -0400
Ernest Christley <echristley@nc.rr.com> wrote:
Bob White wrote:
>I did some measurements of flow rate with two different viscosity's of
>fluids with an EWP. Counter intuitive as it may seem, I found no
>difference in flow rate between viscosity's of 1.3 cp and 5.3 cp.
>
> >
Possible explanation. If the EWP motors are the permanent magnet type motors, they will have a certain RPM that they want to maintain, and they will draw enough current to do that until they burn themselves up. Is this right, Bill D.? Could be that the higher viscosity fluid had the same flow but would be drawing significantly more juice to do it.
As it turns out, I took current measurements during the test. There is
an increase in current with the higher viscosity although I wouldn't
call it significantly more, particularly the current with unrestricted
flow.
Here's the data
No restriction:
Fluid Temp (F) Volt/Current Flow Reading (uncorrected)
Water 55 13.8V/8.4A 10.8
EG/W (50/50) 53 13.8/8.6A 11
Restricted to flow EG/W (50/50) at 6 GPM
Fluid Temp (F) Volt/Current Flow Reading (uncorrected)
Water 49 13.8V/7.0A 5.5 to 6
EG/W (50/50) 52 13.8/7.5A 6
Bob W.
--
http://www.bob-white.com
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