[Bldg-sim] [Equest-users] Roof Conduction Load

[David Wood]

Hi All,

The LS-C report comes from the LOADS simulation portion of DOE 2.2. The
plenum reference temperature used in LOADS is adjusted in the SYSTEMS
portion of the program and the loads in the spaces adjacent to the plenum
are corrected
correspondingly.

Dave Wood


On Thu, Aug 8, 2013 at 8:58 AM, Rodrigo Cerqueira <
rodrigo.cerqueira at mra.qc.ca> wrote:

> Hi,****
>
> This happens because the load calculation is made with a fixed temperature
> (see picture). All the spaces, include plenum zones, have the same
> temperature by default (70°F). So, all roof load appears in the plenum
> spaces. To considerate the roof load, you have to change this temperature
> in plenum spaces and a part of roof load will appear like "internal surface
> conduction". But I'm not sure if this is a good practice. Maybe someone
> else has an opinion about that.****
>
> ** **
>
> ****
>
> ** **
>
> *Rodrigo Cerqueira, *ing. jr, M.Ing.**
>
> *Simulation énergétique*
>
> ** **
>
> [image: signatureCouriel]****
>
> ** **
>
> ** **
>
> ** **
>
> *De :* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *De la part de* Bhartendu
> Awasthi
> *Envoyé :* 8 août 2013 06:35
> *À :* equest-users at lists.onebuilding.org; bldg-sim at lists.onebuilding.org
> *Objet :* [Equest-users] Roof Conduction Load****
>
> ** **
>
> Hi All,****
>
> ** **
>
> I am doing an energy simulation model in eQuest. I noticed that the load through roof conduction in LS-C is zero where as in LS-B (for plenum space) it is showing some load.****
>
> ** **
>
> As per my understanding this load should appear in LS-C also.****
>
> Also, if I reduce the U value of the roof, the load through roof reduces and can be accounted in LS-B only (plenum space).****
>
> ** **
>
> Refer attached LS-C and LS-B reports.****
>
> Any help will be appreciated.****
>
> ** **
>
> ** **
>
> Thanks & Regards****
>
> ** **
>
> Bhartendu Awasthi****
>
>
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-- 
Regards,

David S. Wood
Principal
Wood, Byk & Associates
office:    610.347.0710
mobile:  610.247.1208
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