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Re: [TRNSYS-users] U values


Hi,

this depends on the specific type (not sure if you refer a pipe or what, and if so, which model), and often can be find in the mathematical description of the type. Regards

Angel

El jue., 3 oct. 2019 16:07, Arne Hübner via TRNSYS-users <trnsys-users@lists.onebuilding.org> escribió:

Hello TRNSYS-Users,

does anybody know, how TRNSYS calculates the U-values? Cause when I calculate the U-values by Hand with that Formula:

 

U = 1/(Rsi+d/Lambda+Rse)

 

Rsi,horizontal = 0,13 m²*K/W

Rse,horizontal = 0,04 m²*K/W

 

I get different U-values.

Which heat Transfer coefficients does TRNSYS use?

 

Kind regards,

 

Arne Hübner

 

 

Gesendet von Mail für Windows 10

 

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