[TRNSYS-users] Fire safety calculation

[marcello.caciolo at aximaseitha-gdfsuez.com]

Dear TRNSYS users,

We should make an unusual (for us) calculation about fire safety.

The definition of the problem is quite straightforward: a room has a heavy wall in contact with a space where temperature is rising up to 400 degrees in a hour. We should calculate the airflow rate necessary to limit the temperature rise in the room to  40 degrees during this hour.

I was wondering if it possible to use TRNSYS to simulate this problem. From my point of view, the main limitation of TRNSYS for this application is that, as my wall is heavy, my minimum wall time step for transfer function is more than 1 hours. If I well understand heat transfer functions, it means that the wall temperature will not change during the hour of my simulation, which is not physically correct for this situation, as wall temperature is expected to rise during the hour due to the large heat flux from the adjacent space.

Do you know if there is an alternative way in TRNSYS to simulate a wall (finite difference?) which we could use to take into account the wall dynamics, taking into account the fact that simulation of radiative heat exchange is important in this case due to the large temperature difference? If not, have you never done a similar simulation and eventually with which software?

Thank you!

Best regards,

Marcello CACIOLO
Responsable Outils et Méthodes d'Analyse Energétique
___________________________________________________

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mail: marcello.caciolo at aximaseitha-gdfsuez.com

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