[TRNSYS-users] Error in simulation

[David BRADLEY via TRNSYS-users]

Ismail,

  You'd have to look at the list file to know for certain what the 
problem is but my guess is that the system isn't converging a lot of the 
time. I imagine that the zone RH goes above 70% so the fan turns on, at 
which point the zone RH drops below 70% so the fan turns back on, which 
makes the zone RH go back above 70%. You need to make sure that you're 
using a controller that has hysteresis (a deadband) and that you are 
using a short timestep (one minute perhaps).

kind regards,

  David



On 07/12/2017 04:27, Ismail OUHALLOU via TRNSYS-users wrote:
> Dear Tnsys users,
>
> I want to simulate an AHU building integrated using type 112b. Control 
> signal of type 112b is: The fan (type 112b) is to be ON if the 
> relative humidity of a zone is greater than 70%.
> When I run simulation, it gets blocked at a given time as shawn in 
> figure below:
>
> ​
> Where does the problem come from ?
>
> Thanks in advance
> Ismail
>
>
> -- 
> /************************************************/
> /Ismail OUHALLOU/
> Green building & Sustainability consultant
>
> *Morocco*
> P:+212**620**548**116
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> i.ouhallou at trusted-energy.com <mailto:i.ouhallou at trusted-energy.com>
> issmail.ouhallou at gmail.com <mailto:issmail.ouhallou at gmail.com>
>
>
>
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

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d.bradley at tess-inc.com

http://www.tess-inc.com
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