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[EnergyPlus_Support] Re: Slab pre-processor warning
e+ v7
The slab program can deal with slabs of thickness 0.122m to 0.307m.
If your slab has another thickness, run a couple of other thicknesses, to report the skin temp on the underside of the slab. This can be plotted in excel and linearly interpolated to get the linear equation fit for values you want to assign to "annual ground temps".
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Niraj Poudel <nirajpdl@...> wrote:
>
> Dear all,
>
> I tried to invoke the slab pre-processor within the .IDF file. I went over
> the auxiliary programs document and also over the
> 52ZoneAirCooledWithSlab.idf from the example file. However, when I try to
> run test.idf (attached to this email), I keep getting these warnings.
>
> Program Version,EnergyPlus-64 7.0.0.036, 09/05/2012 10:40 AM,IDD_Version
> 7.0.0.036
> ** Warning ** Output:PreprocessorMessage="GroundTempCalc - Slab" has the
> following Warning condition:
> ** ~~~ ** Slab thickness [0.122 m] reset to 0.122 m for
> computational stability.
> ** Severe ** Output:PreprocessorMessage="GroundTempCalc - Slab" has the
> following Severe condition:
> ** ~~~ ** The calculated ground temperature exceeds -100 C [-204.07
> C]
> ** Severe ** Output:PreprocessorMessage="GroundTempCalc - Slab" has the
> following Fatal condition:
> ** ~~~ ** Program terminates due to preceding condition.
> ** Fatal ** Preprocessor condition(s) cause termination.
> ...Summary of Errors that led to program termination:
> ..... Reference severe error count=2
> ..... Last severe error=Output:PreprocessorMessage="GroundTempCalc -
> Slab" has the following Fatal condition:
> ************* Warning: Node connection errors not checked - most system
> input has not been read (see previous warning).
> ************* Fatal error -- final processing. Program exited before
> simulations began. See previous error messages.
> ************* EnergyPlus Warmup Error Summary. During Warmup: 0 Warning;
> 0 Severe Errors.
> ************* EnergyPlus Sizing Error Summary. During Sizing: 0 Warning;
> 0 Severe Errors.
> ************* EnergyPlus Terminated--Fatal Error Detected. 1 Warning; 2
> Severe Errors; Elapsed Time=00hr 00min 0.67sec
>
> This happens with weatherfiles from Atlanta, Greenville, Chicago,
> WashingtonDulles etc. I am not quite sure what I am doing wrong. Could
> someone, with experience using the slab program (within the .IDF) point me
> in the right direction.
>
> I look forward to hearing from you at your earliest of convenience.
> Sincerely yours'
> Niraj Poudel
> Clemson University
>
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