[TRNSYS-users] Front side Boundary condition

Claros Marfil, Luis Jesus Centag51 at acciona.es
Tue Aug 2 01:47:57 PDT 2011


Hi Trnsys Users,
I would like to know if it is possible to define a boundary value for the FRONT SIDE of a wall directly. In page 6-103 (Type 56 - TRNSYS 16 Manual) it is said that : "Normally, the boundary condition is the temperature of a node connected to the back surface of the wall through a pure resistance. It is possible to specify the surface temperature of the outside by setting the back side heat transfer coefficient of the WALL TYPE to a very small value (less than 0.001 kJ/h/m2).
So, I understand that if a coefficient with a value of  0,001 kJ/h/m2 or lower is used, the boundary temperature corresponds to the back side, and the only way I find to "transform" this back side temperature into a front side temperature is using a very-low resistance (massless layer) by using a high convective heat transfer coefficient in the front side.
Any idea would be highly appreciated.
Thanks,
Luis J. Claros Marfil

Grupo de Materiales Avanzados - Advanced Materials Group

Centro Tecnológico I+D+i  - R & D Technology Center

ACCIONA Infraestructuras
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