Re: [TRNSYS-users] Type 56 – Parameter for internal calculation of heat transfer coefficients – Default values for floor and ceiling

[hotline via TRNSYS-users <trnsys-users@lists.onebuilding.org>]

Dear Marie-Hélène,

in TRNSYS 18, for internal calculation of the convective heat transfer coefficients, you have to choose between the three options floor, ceiling or vertical wall.

The formula to describe the convective heat transfer coefficients can be found in Chapter 5.2.3.2 of the documentation:

Coefficients const and exp can be adjusted here:

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Von: TRNSYS-users <trnsys-users-bounces@lists.onebuilding.org> im Auftrag von Marie-Hélène via TRNSYS-users <trnsys-users@lists.onebuilding.org>
Gesendet: Donnerstag, 27. Juli 2017 21:50:29
An: trnsys-users@lists.onebuilding.org
Betreff: [TRNSYS-users] Type 56 – Parameter for internal calculation of heat transfer coefficients – Default values for floor and ceiling

 

Dear users,

I would like to know if the parameters for internal calculation of heat transfer coefficients (constant and exponent) are the same for a floor or a ceiling than for a wall (which is a vertical surface)? In my model, ceiling and floor are unheated and unchilled.

Kind regards,

Marie-Hélène Talbot | Étudiante à la maîtrise

Énergies renouvelables et efficacité énergétique

Département de génie de la construction

École de technologie supérieure