[Equest-users] BDl Error

[Alex Krickx]

Hi Ramesh,

Regarding your second question of a “missing floor” – I haven’t opened your file, but I think I know what the problem is. eQUEST can use a “floor-multiplier” and simulate only one floor of each type. So on your 4-story building you have 1 ground floor, 2 middle floors, and 1 top floor. eQUEST assumes that the 2 middle floors are identical and will only model one of them. If you want it to explicitly model each floor you can un-tick the box labeled floor multipliers.

If you had a 5 story building it would also only show 3 floors if you use floor multipliers. I hope this helps.

[cid:image001.png at 01CB176A.E10C4100]

Regards,
Alex Krickx


Alex Krickx
Building Energy Specialist
[cid:image002.jpg at 01CB176A.E10C4100]
1250 Elko Dr, Sunnyvale, CA 94089
(t) 408.541.8124

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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of ramesh buddhi
Sent: Monday, June 28, 2010 10:31 PM
To: Nick Caton; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] BDl Error

Hi Nick

Thanks a lot for your prompt reply, as requested please find the attachment of the complete project file.

The layers
"Ceilg Cons Layers" = LAYERS
   MATERIAL         = ( "Gypsum  LW Agg 3/4in (GP04)" )


"Ceilg Construction" = CONSTRUCTION
   TYPE             = LAYERS
   LAYERS           = "Ceilg Cons Layers"

are getting created automatically please let me know where i am wrong. And one more clarification I had created four storey building if you look at the model it has an gap of one floor I do not where i am wrong.


Thanks
Ramesh BR

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________________________________
From: Nick Caton <ncaton at smithboucher.com>
To: ramesh buddhi <ramesh at greenevolution.in>; equest-users at lists.onebuilding.org
Sent: Mon, 28 June, 2010 9:01:00 PM
Subject: RE: [Equest-users] BDl Error
Ramesh,

For future reference, you need to send out more than your pd2 file for others to be able to view your model.  In this case, you should at minimum send the pd2/inp, and you’d want to include the non-library weather file as well if you anticipated others might need to run simulations to troubleshoot.  That said, I think I can guess at the source of this error without looking at your model:

When defining a custom construction (or modifying a wizard construction) -  you cannot define too many layers using the “simplified” method with only an R-value.  This is how simpler programs like HAP/TRACE operate – I suppose they assume thermal massing figures, if retained/transferred heat is modeled at all.  This input method for construction layers exists in eQuest specifically to define things like air film which have no appreciable thermal mass.

If the total defined thermal mass of the wall is too low or zero, the program giving you an error like this because it is recognizing that the energy model will behave unlike any real construction.


~Nick

[cid:image003.jpg at 01CB176A.E10C4100]

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From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of ramesh buddhi
Sent: Friday, June 25, 2010 2:27 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] BDl Error

Hi

I am using eQuest 3-63 can any one help me out on the below error please find the attachment.

 TYPE=PROPERTIES TH=0.0625 COND=0.1330 DENS=45.0 S-H=0.2   ..
Cannot simulate LAYERS Ceilg Cons Layers as given. The wall is too thin or too light. THICKNESS and/or DENSITY*SPECIFIC HEAT is too small. Use U-VALUE CONSTRUCTION.


BDL Error

cannot simulate Layer ceilg cons layers as given. The wall is too thin too light. Thickness and/or Density*specific heat is too small. Use U-Value construction.

Thanks
Ramesh BR
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