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Re: [TRNSYS-users] TRNSYS ground temperature
Sven,
I have done a good bit of searching for algorithms to determine
ground surface temperature and there doesn't seem to be anything very
general; it is too dependent on gound cover. If you had a situation
where the ground surrounding a building were uniformly covered by
something that does not absorb much moisture (like a parking lot for
example) then I think you could make an approximation based on the
emissivity of the pavement.
In all of the other simulation programs that I have looked into, if
they calculate radiation losses to the ground at all, they simply use
the ambient temperature as the ground temperature.
Kind regards,
David
On 9/9/2011 12:34, Sven Böttcher wrote:
Hello everybody,
I'm using TRNSYS 17 and I'd like to use the surface temperature of the
ground (TSGRD) of Type 56.
But I can't find any information in the TRNSYS 17 documentation about the
computation of the long wave radiation heat flux
to the outside wall surface (q_r,s,o).
Is there an updated documentation or does anyone know something about the
computation of q_r,s,o?
I'd like to know the emissivity of the outside ground surface, for example.
Thanks a lot and best regards
Sven
---
Sven Böttcher
Diplom-Informatiker
Wissenschaftlicher Mitarbeiter
Technische Universität Dortmund
Fakultät Architektur und Bauingenieurwesen
Juniorprofessur Energieeffizientes Bauen
Baroper Straße 301
44227 Dortmund
Tel.: 0231 755 5248
Fax: 0231 755 5423
http://www.bauwesen.uni-dortmund.de/eeb/
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***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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