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[EnergyPlus_Support] Re: how the Slab program work

Agreed. Places with warm summers and not so cold winters. As you say, the energy transfer will play a bigger role with decreasing insulation. Excellant point. What is your opinion on the insulation requirements regarding this climate type in ASHRAE 90.1? Do you think the standard incorporates this situation. I'm not so sure it does, in which case code compliance on this point my decrease energy performance. What do you think?

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "cirulo7878" <cirulo7878@...> wrote:
>
> It depends Jean. In places with warm summers, it's worse for the cooling to put insulator in the floor. In the annual balance cooling-heating, the best result can be without insulation in the floor. For that, we would have large U-value and low resistance, and the results may be very differents using basement or slab objetc.
> 
> Regards.
> 
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Jean marais" <jeannieboef@> wrote:
> >
> > As ground temperatures are at roughly 18 deg C and conditioned zones inside are about 22 deg C AND the slab itself is quite thick with usually a large U-value, this makes for a small driving force (delta T) and a large resistance (U-value) which means  that the amount of energy exchange is small and the effect of different slab temperatures on this energy transfer is minimal.
> > 
> > What I'm saying is when improving simulation accuracy, the first place to start is getting more and more accurate data for input on things like people, usage and lights and the last place the slab simulation.
> > 
> > Unless specifically comparing slab types and behaviour, I believe the assumtion recomended by e+ of using a temperure = inside temp - 2 K, to be accurate enough.
> >
>




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