[TRNSYS-users] Invalid floating point operation: strange behaviour

[Serres Laurent]

Matteo,
are you sure m_acqua is declared as a real?
if it is declared as an integer, or if it isn't declared, il could be 
the reason of the error.


Laurent

Matteo DF a écrit :
> Hi everybody,
> I'm having some problems with a type I'm developing... I'm using 
> Compaq Visual Fortran 6.6.c.
>
> Here's the problem, I have these simple line of code, some variable's 
> names are in italian but there's no problem I hope...
>
> T_sonde=(T_rit+Q_h*(1-1/COP)/(m_acqua*Cp_sonde))*(fattore_carico)+T_rit*(1-fattore_carico)
>
> The problem is that if I pass the right value to m_acqua (which is a 
> flowrate) I get an "Invalid floating point operation" error. The 
> correct value for m_acqua si 1500 kg/h which I converted in kg/s, 
> 0.416667. If I pass this value I get the error, if i raise to 5-10 
> kg/s there's no error. If I raise only to 2-3 kg/s the simulation 
> lasts longer but eventually gives an error...
>
> Where can the problem be?
>
> Many thanks,
> Matteo.
>
> -- 
> La scoperta è vedere ciò che tutti hanno sempre visto e
> pensare ciò che nessuno ha mai pensato.
> (Albert Szent-Gyorgyi, scopritore della vitamina C e premio Nobel)
>
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