[esp-r] Re: imposed measured data - air flow network compatability

[Jon Hand]

Considering the door between the bounding space and the room is this supposed to act
as an open door (in case you would want to use a bi-directional flow component) or a
slightly open door (ditto but with width much smaller) or cracks under the door?

If you are moving air from the bounding space via a fixed pressure where is the make-up
air for the bounding zone coming from?  Is there a small opening or crack to the outside?
How do you know that 3PA is relevant?

I would suggest that rather than a fixed pressure you allow the bi-directional component
to do the work based on temperature differences.  Generate a model contents report
and review the air flow and control definitions.  

You do not mention how, specifically you are setting the conditions in the bounding
zone or whether the temperatures in that zone are meant to change at each timestep.

In the results analysis you need to look for a number of things:
a) zone energy balances in both rooms - you should see some heating/cooling in the
bounding zone and if you do not then it is likely that you missed out something in
the control.
b) look at the flow results and see what is happening at the door.

Regards, Jon Hand

________________________________________
From: esp-r-bounces at lists.strath.ac.uk [esp-r-bounces at lists.strath.ac.uk] on behalf of Andrew Cowie [cn06arc at leeds.ac.uk]
Sent: 31 October 2013 14:14
To: esp-r at lists.strath.ac.uk
Subject: [esp-r]  imposed measured data - air flow network compatability

Hi all,

I have a single room model (essentially) that I'm trying to validate against measured data.  I have hourly temperature data for the corridor outside the room, which I have imposed as db temp of an arbitrary zone outside the door (all boundaries adiabatic as I do not care about the thermal performance of this space), and I have set up an air flow network such that the air from the corridor should infiltrate fairly slowly into the functional zone (via a door air flow connection, type 130).  However when I run a simulation and look at db temp results, the temperatures of the arbitrary corridor zone do not match the measured data imposed on the zone.  So my question is this: is the measured data imposition function compatible with an air flow network (ie. does the air flow node assigned to the corridor zone automatically pick up the imposed temperature data)?  If so then why does the db temp in the corridor zone not match the imposed data when I look at results?

I have ensured that all air flow nodes are correctly assigned and the measured data is assigned to the correct zone.  The corridor zone air flow node is set as a known internal (type 1) with a pressure of +3 Pa.  There are no other pressure sources in either zone (all windows fully closed, no hvac).

Thanks in anticipation,
Andy Cowie
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