I had the same questions some years before and never had any answer ...
However these moisture transfers are essentials for air conditioning calculations. It would be very helpful if someone of transsolar explains us how to use this Moisture Capacitance Model. It seems that explanations in volume 5 Manual documentation are not enough clear ...
Many thanks for any help !!!
Scop ENERTECH
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Hi everyone,
I’m working on a multi-zone building (type 56) model with TRNSYS18 and I want to use the Moisture Capacitance Model (Buffer Storage Humidity Model). To do this, I have to define 6 parameters: Ksurf, Kdeep, Msurf, Mdeep, Bsurf and Bdeep for every thermal zone.
There are many questions about this on the mailinglist but not many answers. I listed some questions about the Buffer Storage Example (TRNSYS documentation) below :
1- When calculating Mdeep, why the thickness of every material i is not double in the calculation of Mi as it is for the calculation of Msurf ?
(https://www.mail-archive.com/trnsys-users@engr.wisc.edu/msg01911.html)
2- When calculating Mdeep, they do consider the concrete from ceiling and ground floor, but there's some information missing in the example to explain Mconcrete = 175kg. For this calculation should I use the thinkness and area of concrete from floor and ceiling?
3- When calculating Bdeep, the value of A is 50m^2, wich is the wall/gypsum area. Floor and ceiling area are neglected?
4- Someone know a good link or reference about this calculation?
Thank you very much,
Marie-Hélène Talbot | Étudiante à la maîtriseÉnergies renouvelables et efficacité énergétiqueDépartement de génie de la constructionÉcole de technologie supérieure
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