[TRNSYS-users] Outside temperature of an external wall at time XXX not converged!

[Rabah DJEDJIG via TRNSYS-users]

Dear Merk;
thank you for your reply. Quser is not an T56 output.
just after sending my message, I immediately solved my problem. The solution
consist just to eliminate QSKY not as I have written before the equation but by
setting the on emissivity to 0 on back side.
Best,
Rabah

2016-07-05 16:42 GMT+02:00 hotline <hotline at transsolar.com>:

> Dear Rabah,
>
>
>
> am I understanding you correct:
>
> -          *Quser, QSKY_S1-ABS *and* TSO_S1 *are outputs of Type 56
>
> -          You take these outputs and use them for your surface gains
>
>
>
> This will definitely cause convergence problems since you manipulate a
> balance by using outputs of this balance.
>
> You will have to find a different solution for your task.
>
>
>
> Best
> Jakob Merk
>
>
>
>
> _________________________________________________________________________________________________
>
>
>
> *Jakob Merk*
>
> TRNSYS Software Team
>
>
> *Transsolar Energietechnik GmbH*
>
> Curiestraße 2
>
> 70563 Stuttgart
>
> Fax:        +49 711 67976-11
> Email:    hotline at transsolar.com
>
> Web:      www.trnsys.de
>
>
>
>
>
>
>
> *Von:* TRNSYS-users [mailto:trnsys-users-bounces at lists.onebuilding.org] *Im
> Auftrag von *Rabah DJEDJIG via TRNSYS-users
> *Gesendet:* 05 July 2016 15:46
> *An:* TRNSYS-users at lists.onebuilding.org
> *Betreff:* [TRNSYS-users] Outside temperature of an external wall at time
> XXX not converged!
>
>
>
> Dear all,
>
> Please, can any one help me to fix this problem:
>
>
> For some reason, I try to do the following operation on the outside
> surface (S1) of an external wall (with type 56 and an equation):
>
> surf. gain outside_S1 = *Quser*
> +QSKY_S1-ABS*IT_S1-HCONVO_S1*AREA_S1*(TAMB-TSO_S1)
>
> i.e. eliminate on this surface all gains calculated automatically by Type
> 56 and add instead a user defined gain Quser.
>
>
> This seems to work perfectly at the beginning of the simulation before
> arising this error:
>
> Message: outside temperature of 1 (external) wall in zone 1 at time
> 2419.00 not converged!
>
> I tried to modify Convergence tolerance, to change the components torder,
> etc ... fruitlessly
>
> Best regards,
>
> Rabah
>
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