modelling ground ducts

[alisyed]

hi.
can anybody help me regarding ground ducts.
i am trying to include ground ducts for the supply of fresh air to the classrooms.
i am trying by considering aux vent air comming in at 3 degree less than external temperature during summer.
is there anyother better way to include ground ducts, for ducts considering concrete ducts burried in ground .
also what will b the supply temperature during winter.


thanks
ali

[PCully]

I moved this to the Thermal category as I believe you will get more constructive advice there

Phil

[PCully]

wonder if this Knowledge Base article on Earth Tube modelling might help here

http://www2.iesve.com/Support/Knowledge ... sectionId=

Phil

[PCully]

d'oh, updated it on my original post!

Cheers,
Phil

[KasperS]

Hello

If you know what the temperature will be, then you can just set up so the inlet temperature of your air is TO -3 degrees, if it is always 3 degrees. However i dont think you will have 3 degrees always, and it would be better to figure out a curve for the temperature depending on the outside temperature, like 0.3*TO +6 or something like that. It worked for me when i used it in a basic model