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NC-v4.1 EAp2:Minimum Energy Performance

Elevator

Hello everyone,

I am trying to model the elevator in a 4 storey office building usign Design Builder v4.7 (bought in 2016). As far as I understood, with the latest LEED version elevators are not a process load anymore since there are specific instructions on how to model them. Therefore, Proposed and Baseline elevator models must differ. Having the following data: Weight of the car 436 kg (961.21 lb), Rated load 680 kg (1499.14 lb), Speed 1 m/s (196.85 ft/min) the peak power I obtain is 26 217 W, which is huge compared to the one of the proposed building, 4 000 W.

Given the extremely high power of the baseline elevator I cannot model it within the shaft (power density > 1000 W/m2, which is the limit of the software). Therefore, I thought that I could model it using the Building Area Method, which is the way I modelled the receptacle loads. Am I allowed to do so? Or, does this method go against the protocol? If I am not allowed, how can I proceed? 

I thank you in advance.

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Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 06/26/2020 - 13:26

I don't know how to model an elevator in Design Builder so perhaps that is a better question for the software developer or the Energy Plus help desk. Modeling it as a equipment power density does not make much sense to me.

Fri, 06/26/2020 - 14:05

With my version of the software it is only possible to model it by using power density, I do not know about more recent ones, though. I thought of that solution because it seemed to be the only possible way and wanted to know if it could be done according to LEED.

Thu, 12/15/2022 - 13:52

Hi there, I would like to know, is it mandatory to include elevators and escalators in the energy model?, if that is the case, do they have to be the same in the proposed and baseline scenarios?, otherwise, how do I set my baseline elevator and escalator?

Thanks
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 12/15/2022 - 14:52

Yes all energy use must be included. It is a process load so it must be idential unless you want to claim savings via an exceptional calculation. If not claiming savings model the elevator in the proposed and then model it identically in the baseline.

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