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Re: [EnergyPlus_Support] Shading by adjacent structures not possible in LEED baseline and E+



That's good to hear about the self shading. I understood that from the documentation, but still doubted my interpretation. Yes, if it's in both models it should be fine. I had a problem with it once before, and instead of arguing with the reviewer, I just deleted them.

Mit freundlichen GrüÃ?en- Sent from my iPhone (excuse the brevity)

i. A.
Jean Marais
b.i.g. bechtold
Tel.   +49 30 6706662-23

On 26.03.2015, at 10:59, "ecoeficiente@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 

Thanks Jean. Do you mean that external structures are not allowed? Or it depends on the reviewer? In LEED tables for the credit, it specifically says that you may add them if you do it for both the proposed and baseline. 


BTW I have tested that minimal shadowing does not account for self-shading, so it seems to be ok with that LEED provision.

Regards,

Germán Campos


---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <jeannieboef@...> wrote :

From painful experience I can testify that building external structures were not allowed for either proposed or baseline buildings. I have had good indication from other experts that if they were accounted for identically in both, then they should have been allowed. Deleting external shading parts of my idf was my way of dealing with the issue at the time, but I saved a backup that was later used in the daylight and nat vent comfort simulations.

The other shading question relates to the self-shading of the building on itself which should be "switched off" for the baseline. I don't know if this is posible with e+ and have used "minimal shadowing" as the best approximation.

Mit freundlichen GrüÃ?en- Sent from my iPhone (excuse the brevity)

i. A.
Jean Marais
b.i.g. bechtold
Tel.   +49 30 6706662-23

On 24.03.2015, at 16:22, "ecoeficiente@... [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:

 

In LEED Energy modelling for EA Credits, it is allowed (not compulsory) to include shading by adjacent structures. This can have an important effect on the results for the proposed building. However, in E+ there is no option to include only the shadowing by adjacent structures for the baseline case. If you remove all external shadowing with MinimalShadowing option, you don't account for adjacent structures. If you choose any other shadowing option, although you may remove all shadowing surfaces from the model, self-shading is always considered, which is not allowed by LEED.

Is there any solution I am not taking into account? The only option I see is to remove shading by adjacent structures, which can affect quite negatively the results from the proposed design.

Regards,

Germán Campos




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Posted by: "jeannieboef@xxxxxxxxx" <jeannieboef@xxxxxxxxx>


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