[esp-r] Re: storage of humidity within massiv components ?

[Jake Zwart]

Hi Gunter,

I have been told that esp-r does not model moisture storage in walls which
is an essential element of moisture calculation.  Not sure about the vapour
diffusion part.

I have attached two papers that talk about moisture modeling in walls.  I
have tried the simpler steady state method within a spreadsheet and it is
quite easily implemented.  The other paper offers about a 5 year old review
of simulation packages that may do the modeling that you require.

I find the web site www.balancedsolutions.com quite useful for research in
this area.

I have cced the author of the papers, in case you have any direct questions.

I wonder if there has been any discussion about implementing moisture
transport and storage within walls in esp-r and what the interest would be.
I think it would be quite useful.

Jake Zwart

-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk
[mailto:esp-r-bounces at lists.strath.ac.uk]On Behalf Of Pueltz, Gunter
Sent: Monday, 26 November, 2007 10:42
To: 'esp-r at lists.strath.ac.uk'
Subject: [esp-r] storage of humidity within massiv components ?


Dear ESRUs,

I have to simulate historic rooms with a bit humid walls by ESP -r.
Concerning humidity WITHIN the massiv components (not only at the internal
surface) following questions:

1) Does ESP -r calculate the humidification + de-humidification of walls
resp. the storage of humidity in the walls ?
In the material database a vapour resistivity is defined for each material
....
But does ESP-r model vapour diffusion within a multi-layer component ?

2) If there exists a humidity source - e.g. in the ground (groundwater or
rain water, which raises upwards into the walls of my rooms) - how can such
a humidity source be implemented WITHIN a multi-layer-component (e.g. a
wall) ?

Any idea or comment appreciated.

Regards,
Gunter


--
Dr. Gunter Pültz

Müller-BBM GmbH
Robert-Koch-Straße 11
82152 Planegg
Telefon +49 (0)89 85602 - 336
Telefax +49 (0)89 85602 - 111
http://www.MuellerBBM.de

HRB München 86143
Geschäftsführer: Bernd Grözinger, Dr. Edwin Schorer, Norbert Suritsch

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