[esp-r] Re: moisture networks a "how to" guide anywhere?

[Geissler Achim]

Hi Christopher,

this has been lying around a while - it seems nobody has any readily available information, so in case you haven't dropped or solved the issue, here is my limited knowledge on this topic:

-       The adaptive gridding code is broken, as far as I have been able to find out. Some time ago, I attempted to get an exemplar running (including some code changes) but did not succeed

-       To have surfaces consider absorption of humidity, I think you do not need the adaptive gridding. However, it has been quite a while that I have used this so sadly cannot really help.

Best
Achim


Von: esp-r-bounces at lists.strath.ac.uk [mailto:esp-r-bounces at lists.strath.ac.uk] Im Auftrag von Christopher Heard
Gesendet: Mittwoch, 28. Mai 2014 04:13
An: esp-r at lists.strath.ac.uk
Betreff: [esp-r] moisture networks a "how to" guide anywhere?

I am trying to get a model of a simple log cabin to match measured data - I have managed reasonably well with the temperatures but the modelled relative humidity swings a lot more than the measured values. Given that the construction is untreated bare fir logs then there must be a lot of moisture adsorption going on which damps out the R.H. swings from the considerable infiltration.

I have been looking for a guide to how to set up a moisture network (I only have one zone!) - looking at the Synopsis of the model House with moisture modelling in living room.

I suppose the key is in option k "Adaptive gridding and moisture" in the Zone Composition menu however the help doesn't seem to get beyond option "c" and this is option.

And then the help on selecting a zone is:

"There are four adaptive gridding files which must be specified
for each zone to which such gridding is to be applied.

  The moisture file holds moisture transport data for nodes.

  The 3D control volumes file defines...<< ? >>

  The 3D control volumes connections file defines...<< ? >>

  The 3D nodes coordinates file defines...<< ? >>

  The 3D nodes temperatures file defines...<< ? >>

To proceed with adaptive gridding you first have to...
   << instructions to be added >>

Check documentation for more information. "

The Cookbook doesn't seem to have anything much on moisture modelling.

The paper "Moisture flow modelling within the ESP-r integrated building performance simulation system" by J. Clarke is helpful on the capabilities available.

I have also looked through Abdullatif E. Nakhi's thesis

I have probably overlooked an obvious source of "how to" or are there dragons here?

Could someone please point me in the right direction.

Christopher Heard

Mexico City
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