[esp-r] Re: Night-time ventilation

[Achim Geissler]

Dear Maria

there are four methods for ventilation simulation in ESP-r:
a) via operations file, use "infiltration" for night time ventilation (note that "ventilation" in the operations files means "between zones", not to/from the ambient),
b) by AIM ("air infiltration model" - I don't know anything about this, as I have never used it),
c) via an external data file "tdf" and
d) via an air flow network.

The latter is the most sophisticated and takes the most "setting up" work (and likely the most knowledge of "what you are doing") - if your study is really focussing on night time ventilation, then this may be the best bet - you can open and close windows and doors via control, the actual air movement is calculated based on temperature differences (stack) and wind velocities. 

"a)" is quickly set up (by schedule in "operations file" menu") but has the significant drawback that the air changes are fixed by you and need not have any bearing on actual flows possible at any given time. "c)" is in effect a variant of "a)", however you can use smaller time steps ("a)" allows only hourly changing values). You could also use measurement values, with "c)".

Hope that helps a bit.

Regards
Achim


On Jun 17, 2013, at 6:01 PM, "Archontiki, M." <m.archontiki at student.tue.nl> wrote:

> Dear all,
> 
> Could please somebody give me a hint on how to import night time ventilation during cooling period? I have defined the infiltration and ventilation flow values for certain periods and I would like to have increased flow rates during non occupied hours, in the cooling months. I show the thermostatic control option but it applies to all day types and periods. Thank you in advance.
> 
> Kind Regards,
> Maria Archontiki
> 
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achim.geissler at intergga.ch