[TRNSYS-users] Unusually slow run time

[David Bradley]

Fred,
  On open loops (whether fans or pumps), its wise to connect the fan's 
outlet flow rate back on itself (as its own input) so that only "real" 
fan mass balance" warnings get written to the list file.
Best,
 david


Fred Betz wrote:
> I have solved the run time error through a combination of things that I won't go into here, but I have new warning, and I am not sure how significant it is. 
>
> For 50% of the time steps I get a "Fan Mass Balance" warning. 
>
> However, the 2 fans are on open loops. 
>
> 1 fan is pulling in outside air from the weather file, going through its coils, and then exhausts it. 
>
> The 2nd fan is similar, it gets temp and RH from a fictitious space (an equation), goes through a coil, and exhausts it to atmosphere. 
>
> There isn't something like the "water draw" that you could use to pull air from an infinite resource is there?
>
> Fred
>
>
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>
>   

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