[TRNSYS-users] Buffer storage humidity model

[Neil Shankland]

Dear All,

 

I am trying to evaluate the buffering effect of porous clay plaster on
internal humidity variations. A search of the list archive has drawn a
blank on this topic, so perhaps someone can shed some light on my
queries.

 

In the Type 56 manual, why is the mass of the surface buffer calculated
using twice the buffer thickness (Eq.6.4.3-10)? Is there a reason for
doubling the construction mass for moisture storage calculations?

The Buffer Storage Example uses double the penetration depth to
calculate the surface buffer mass, as expected from Eq.6.4.3-10, but
then uses the actual layer depth to calculate the mineral wool mass in
the deep buffer - any explanations for this apparent discrepancy?

The deep buffer mass in the example includes the surface buffer mass -
is this correct?

Finally, can anyone comment on the validity of the typical surface
exchange coefficient per m2 (Eq.6.4.3-11) when walls have a porous clay
plaster finish?

 

Many thanks in advance for any advice.

 

Regards,

 

 

Neil Shankland

CoSA Solutions

Buro Happold

2 Brewery Place

Brewery Wharf

Leeds

LS10 1NE

T: 0113 204 2956

F: 0870 787 4144

 

www.burohappold.com

 

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