[TRNSYS-users] Adiabatic floor with active layer

[Sabine Jansen - BK]

It is for a student project, so it's not a real case, but we want to make sure all input goed to the zone we are simulating. (Otherwise it is hard to distinguish between Qcomi resulting from solar input and from active input). But otherwise we can just assume very thick insulation.
 

________________________________

Van: Arie Kalkman [mailto:A.Kalkman at chri.nl]
Verzonden: wo 5-11-2008 16:38
Aan: trnsys-users at cae.wisc.edu
Onderwerp: Re: [TRNSYS-users] Adiabatic floor with active layer



Dear Sabine,

 

It is hard for me to imagine a situation where an adiabatic boundary to an active layer makes any sense?

Since an active floor wil generate heat flows up and down, which usually are not identical (due to the position of the active layer in the floor, but also due to floor covering and different convective heat transfer coefficients), you usually need to model a dummy zone and simulate both heat flows.  Could this be a solution to your problem?

 

Kind regards,

 

Arie

 

 

________________________________

Van: Sabine Jansen - BK [mailto:S.C.Jansen at tudelft.nl] 
Verzonden: woensdag 5 november 2008 16:03
Aan: trnsys-users at cae.wisc.edu
Onderwerp: [TRNSYS-users] Adiabatic floor with active layer

 

Dear all,

 

Does anyone have experience with simulating an adiabatic boundary for a wall or floor with an active layer?

 

Usually I define an adiabatic wall with boundary - identical. But for a wall with gains (from sun or TABS) this results in heat transfer from the back surface of the wall as well, since the floor is warmer than the zone and the identical temperature is equal to the zone temperature.

 

I hope someone knows how this can be done for active floors!

 

Thanks in advance,

Kind regards, Sabine Jansen

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