[Bldg-sim] air flow sensors

[RobertWichert]

I would use a spinning fan blade anemometer, because that is all that I 
have!  You would have to make up your own grid and integrate the 
results.  But who is going to argue with you?

I would NOT use a flow hood or a pitot tube, even if I owned them.



Robert Wichert P.Eng. LEED AP BD&C
+1 916 966 9060
FAX +1 916 966 9068







===============================================

On 7/3/2012 7:44 AM, Marques da Silva wrote:
> 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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