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

[hotline via TRNSYS-users]

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.

[cid:0599e734-e97b-4328-9562-37bdf09fb623]


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

[cid:54d582f6-5df5-436b-8c93-604f7c8823af]


Coefficients const and exp can be adjusted here:

[cid:bf5c1e73-f1a6-4d71-b095-b4b7aa0026ad]

________________________________
Von: TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org> im Auftrag von Marie-Hélène via TRNSYS-users <trnsys-users at lists.onebuilding.org>
Gesendet: Donnerstag, 27. Juli 2017 21:50:29
An: trnsys-users at 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

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