Dear Hanan,
Yes DesignBuilder calculates thermal mass data but in the
current release it is not easy to get the output. In the next version, thermal
mass will be displayed on the constructions dialog on the Calculated tab as a
Km value in KJ/m2/K. Also, thermal mass will be included in the CSV report as
Km x area for each surface so you can sum the values for the whole zone/building.
Km is defined in prEN 13790 as a standard measure of thermal mass as measured from
the inside.
Km
Definition (from BRE SBEM manual):
Calculate the contribution of each layer of construction by
calculating: density (kg/m3) x thickness (m) x specific heat capacity
(kJ/(kgK)).
Starting from the layer of the construction closest to the space
(i.e., from the interior), add these values together until any one of the
following conditions is satisfied:
the total thickness of layers exceeds 0.1
metres
you have reached the mid-point of the
construction
you have reached an insulating layer (defined
as having a conductivity of 0.08W/mK)
This new
version should be available in beta test form next week. Look out for
v2.1.0.052 or later.
Regards,
Andy
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Dr Architect
Sent: sexta-feira, 29 de Janeiro de 2010 7:31
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] External walls thermal inertia
Dear Everyone,
I hope this email finds you
all well,
Question please:
My case study is a residential building and I'm using DesignBuilder software.
I was asked to provide some
information about the "external walls thermal inertia" before
and after applying some modifications like changing the type of
insulation.
So, I was wondering if the "DesignBuilder" calculates this. If
yes, where can I find this information?
if not, which software can
calculate it?
Thanks!
Hanan
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