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[EnergyPlus_Support] Re: Ground Temperature Input

Hi everyone!

I have the same warning, but my model has no basement and is 50 cm above the ground.

Is it Okay, to leave the groud temperatures with 18 degree C throughout the year?

Thanks in advance!

Amy

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@...> wrote:
>
> It's a warning.  Usually rule of thumb for ground temperatures (the 
> slab program is really designed for conditioned spaces -- but you 
> could run once and get the usual indoor temperatures) is 2 deg C less 
> than the interior temperature.
> 
> If you use 18C and your interior temperatures are really in the 30C 
> range, then you will get cooling from the ground heat transfer and 
> illogical/inaccurate results.
> 
> At 06:59 AM 5/10/2011, Ethan Gill wrote:
> >I also used this method for the unconditioned model, but the 
> >resulting temperatures were very high in the months of may to august 
> >(above 30deg. C). Also, a warning massage had appeared  that 
> >"Site:GroundTemperature:BuildingSurface: Some values fall outside 
> >the range of 15-25C".
> >My questions are:
> >1. Is it is correct to use this method (Utility:Slab) for the 
> >calculation of Ground temperatures for an Unconditioned model? Can I 
> >use the default values (18deg. C for every month by EnergyPlus) only 
> >for the unconditioned model?
> >2. As the climate is a Hot and Dry Climate, so the ground 
> >temperatures will be high then what is the significance of this warning?
>




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