[TRNSYS-users] trnsys - help

[David BRADLEY via TRNSYS-users]

Ilyas,

   In addition to making sure that there is enough thermal capacitance 
in your system, you need to look carefully at the timestep you choose. 
TRNSYS can make only one control decision per timestep. If you are 
running a system with a 1 hour timestep that means that if the decision 
is to turn on a heater then the heater will stay on for at least 1 hour, 
very likely overheating the space.

   I would recommend that you follow through the tutorial called 
"Temperature Level Control from Energy Rate Control" that can be found 
at 
http://sel.me.wisc.edu/trnsys/downloads/tutorials_and_examples/tutex17.htm. 
It addresses some of the issues that you are likely to find.

   Also, if you have access to the TESS HVAC library, you will find a 
lot of models of the devices that you need for heating and cooling 
building zones.

kind regards,

  David



On 01/18/2017 11:41, Ilyas KHELIFA KERFAH wrote:
>
> Hi,
>
>
> I have a gas heating system installed in the corridor of an apartment. 
> As I have not found a good component for my case in the TRNSYS studio. 
> I put only one calculator in the studio to calculate the power (= 
> calorific value of gas * efficiency * flow). This flow is controlled 
> with a regulator. But I see in my figures that the temperature 
> increases in a single stroke. And its not logical because the 
> temperature should increase gradually. Maybe you have an idea or a 
> component of TRNSYS that I can use it so that the power does not 
> increase quickly.
>
> thank you.
> Cordially.
>

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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