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Forum discussion

Schools-2009 EAp2:Minimum Energy Performance

Renewable Energy Source Summary

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Sara Goenner Curlee
Sustainability Manager and Architect
Pope Design Group
LEEDuser Basic Member
47 thumbs up

I'd like to understand better how to input what is needed in Table L-1 for our solar thermal system (our solar PV system was easy to input). The system designers say the annual production is 9.4 MWh (which I'm assuming is really mWh). I've asked them to convert that to therms. Does that sound right? However, are the rated capacity and annual energy costs columns required?? It seems to calculate without them.

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Wed, 04/11/2012 - 13:10

If the back up system is electric then it is probably good to report the production in those units, if gas then therms. You should enter both values. The rated capacity helps the reviewer understand the system size and capacity. The cost is needed for some of the other tables in the form to work. You will need to provide the calculations used to determine the energy use of both systems for EAp2 and EAc2.
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Sara Goenner Curlee
Sustainability Manager and Architect
Pope Design Group
LEEDuser Basic Member
47 thumbs up

Wed, 04/11/2012 - 18:00

Thanks, Marcus. Our backup is gas so I will use therms. Do you know which other tables use the cost information? Our energy modeling consultant is assigned this form and he didn't see that the cost affected anything else. I'm merely providing the renewable info for him to input. And, does 'Annual Energy Cost' mean the cost for the energy that is saved (in this case, the therms not expended because solar energy was harvested)?
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Wed, 04/11/2012 - 18:29

I think it depends on if you are using the manual or automatic cost tables - EAp2-12. Yes it would be the avoided energy cost calculated using the virtual rate for natural gas from the model.

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