[Bldg-sim] air flow sensors

[Marques da Silva]

Hi Chris

I beleive you want to measure on a real window where the flow velocity 
will be low. Pitot tubes lose accuracy for very low velocities.

The issue of using a grid of measuring points applies for any kind of 
device because of the variability of the flow across the opening.

Hot wire anemometers are very good foy low velocities but they are 
sensitive to the  incoming flow direction. Maybe the best option will be 
the omnidirectional sensors (a sphere). They measure low velocities and 
are direction independent. Of course you can not obtain the flow 
direction from them. Airflow Instruments is a possibility.

A flow hood could be an option but it is unidirectional.

Hope this did not increase turbulence...

Fernando
> I am wondering what kind of air flow sensor one would use to measure 
> the flow through opened windows?  This is for a house monitoring 
> projects.  I have the DB and WB loggers.  Would you do a transverse 
> with a pitot tube?  Would a flow hood work?
>
>
> >>
> Christopher Jones, P.Eng.
> Suite 1801, 1 Yonge Street
> Toronto, ON M5E1W7
> Tel. 416-203-7465
> Fax. 416-946-1005
> email cj at enersave.ca
>
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