[TRNSYS-users] Dry fluid cooler Type 511

[Jeff Thornton via TRNSYS-users]

If you want the fan to run (and you do) then you should have a controller feeding a fan signal to the fluid cooler.  This can be a simple on/off differential controller, a PID, a multi-stage controller etc. You can use the same signal that is turning your chiller on and off or even the part-load output from the chiller to run the fans at a fraction of its rated speed corresponding to the current load.

But most importantly, if you suspect the fluid cooler needs a fan control signal than try that first - even if it's as simple as setting the unconnected input to a value of 1 and running it full speed.  

Jeff Thornton
TESS

Sent from my iPhone

> On Jul 12, 2016, at 10:39 AM, Stefano Tosoni via TRNSYS-users <trnsys-users at lists.onebuilding.org> wrote:
> 
> Dear all,
> 
> I have a problem with my Trnsys17 model. I want to connect the type 666 (water cooled chiller) with type 511 (dry fluid cooler) for cooling the fluid of the chiller.
> I've linked the two types but something don't work right because the temperature of the fluid inlet in type511 is the same of the temperature of the fluid outlet the type511; furthermore the temperature increase from start to the end of the simulation (365days).
> I've linked the temperature and the flow from type 666 to 511 and from type 511 to 666 and I've linked drybulb temp of weather data to type 511 ambient temp.
> 
> Should I put a controller for control signal fan?
> Someone have any idea?
> 
> Thanks,
> Stefano
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