Dear All,
We want to buy RECS for our project but I am confused about the quantity to buy. We performed an energy model and the total electricity demand for the project is 4,000,000 kWh. I don't think we have to buy 35% of 4,000,000 kWh to comply with the credit (i.e 1,400,000 kWh annually and then purchase it for two years which becomes 2,800,000 kWh). On the form for EAc6 total electricity consumption (i.e 4,000,000 kWh) has been automatically included from EAp2. Next step is to determine the Core and Shell electricity usage. We can edit only the tenant use in the form.
My question is how to determine/write the tenant electricity use on the form based on energy modelling of 275,000 sq. ft. building project with 4,000,000 kWh and finally determine how much quantity of REC we have to buy for our project?
Kind Regards,
Saud Abdul Rasheed
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
February 4, 2015 - 9:01 am
It depends on the software you are using. In some you can create meters and place the tenant energy usage on those meters to separate them.
Saud Abdul Rasheed
Sustainability/Energy Engineer, CEM, PMP, LEED AP BD+C, LEED AP O+M, Estidama PQP23 thumbs up
February 4, 2015 - 9:40 am
Dear Marcus,
Ok I understand that. But can I also calculate it using the following approach if I cannot get it from any software?
35% of 15% of 4,000,000 kWh ( =210,000 kWh annually)
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
February 4, 2015 - 10:58 am
Option 1 - Energy Model
If you are not using the threshold adjustment calculator then use the actual area of CS space or 15% which ever is greater. Multiply this percentage ties the total electric consumption and buy 35% for two years. If the core space is under 15% then your formula is correct.
If using the threshold adjustment calculator then the owner controlled and owner influenced electric consumption should be used which would be a higher amount of electricity than the simple area method.
So the quantity of the purchase will depend on whether you are using the threshold adjustment calculator.
Saud Abdul Rasheed
Sustainability/Energy Engineer, CEM, PMP, LEED AP BD+C, LEED AP O+M, Estidama PQP23 thumbs up
February 4, 2015 - 1:47 pm
Our CS area is just 1% which is under 15%. So for our project I can use the formula I have written above. But one thing is still not clear for me, what actually is the "threshold adjustment calculator"? Is it to balance the electricity consumption quantity on the form itself (like writing 15% of electricity use in core and shell and the remaining 85% will be automatically moved to tenant consumption blank)
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
February 4, 2015 - 5:02 pm
No it has to do with adjusting the EAc1 percentage thresholds for earning points. Rather than try to explain it go take a look and see if it becomes clear.
http://www.usgbc.org/resources/cs-2009-eap2-c1-acp