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Re: [TRNSYS-users] heating load - 1 mn time step


Hi Alain,

I guess that you are calculating the heating load with unlimited heating power. If that's the case, you are requesting to type 56 that the building reach the setpoint  temperature in 1 minute (that might be lot of energy for such a small amount of time) and the sudden peaks in the heating load appear at times where you have a change in the setpoint temperature. I will suggest that you use a limited power for your heating device, or increase your time step to a time that you find reasonable to heat your building. In general, smaller time steps are "better", but if you are just interested in calculating your heating load that's not necessarily true, specially if you are interested in calculating peak power. Hope it helps, best regards

Angel

El mar, 28 sept 2021 a las 10:44, Alain GUIAVARCH via TRNSYS-users (<trnsys-users@lists.onebuilding.org>) escribió:

Hi everybody,

 

I’m simulating a projet with type 56, and 1 mn time step.

I don’t understand the heating load : it varies too much each hour, like something is not interpolated (green curve in the attached file ).

Would anybody have any idea, did I forget something ?

 

Best,

 

Alain Guiavarch

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Àngel Carrera Martín
Consultor sènior en Sistemes
Llicenciat en ciencies físiques
Sistemes Avançats d'Energia Solar Tèrmica - AIGUASOL

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