[esp-r] Re: air flow rate in air flow net

[Hall Monika]

Hello Jon,
 
the unit is "one/hour" = ach
 
You are right, with a liter per hour it would be a very small air change
rate. I'm sorry, that it was not clear.
 
Regards
Monika
 

  _____  

From: Jon Hand (clcv10) [mailto:jon at esru.strath.ac.uk] 
Sent: Wednesday, November 29, 2006 4:52 PM
To: Hall Monika
Cc: esp-r at lists.strath.ac.uk
Subject: Re: [esp-r] air flow rate in air flow net



I have a constant air flow rate of 1.0 1/h for working days (7:00-18:00).
All other times the air flow rate is constant 0.5 1/h. 


This caught my attention - one litre per hour is a really really small
number in
terms of air flow for any zone bigger than the box an ipod came in.  This
would
be held as an equivalent m^3/s which is at the 4th decimal place and
the 0.5 litre per hour might be at the 5th decimal place so it might
be possible that simple rounding errors and numerical noise are factors.

And a change in volume in a zone could easily result in a bigger
flow than this fixed rate.  Suggest a run with 10 litres per hour etc.
to see if the glitch goes away.

-ESRU
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