Daniel,
Arie's response is quite correct.
Additionally, if you do not want to use the
annual ambient temperature as your boundary wall
temperature, you can use the temperature of
undisturbed ground as calculated by the Kasuda
correlation from Type77. This makes the ground
temperature a function of depth and time of year.
Like with Arie's response, it assumes that the
ground is an infinite source / sink and that
energy transferred from the building through the
wall to the ground does not affect the ground
temperature in the long term. We have written a
few basement models recently that do account for
the change in the ground temperature due to
energy transfer through the wall but they assume
four basement walls and a floor. If you only have
one wall below grade then you might be best off
using Arie's method either with the annual
average ground temperature or with Type77.
Cheers,
David
At 12:48 4/12/2007, Helbling Beratung + Bauplanung wrote:
Content-class: urn:content-classes:message
Content-Type: multipart/alternative;
boundary="----_=_NextPart_001_01C77D2A.CB11DF05"
Hello everybody
Can anyone, tell me whats the best way to
simulate a external wall against the ground.
How can I define the ground ??
Thanks in advance
Mit freundlichen Grüssen / Kind regards
Daniel Büchele
Dipl. Ing. Gebäudeklimatik- / Technik
Projektleiter
Helbling Holding AG
Hohlstrasse 614
CH-8048 Zürich
Telefon +41 44 438 18 64
Mobile +41 79 641 44 03
Telefax +41 44 438 18 10
<mailto:[EMAIL PROTECTED]>mailto:[EMAIL PROTECTED]
<http://www.helbling.ch>
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