We´re working on a Resort LEED Project (one owner) conformed by a Hotel, service buildings, SPA and villages, LEED boundary is considering only Hotel and Service Buildings, however, Cooling Plant (3 chillers) will provide chilled water to the whole resort, therefore, is it required to use DES guidance for EAp2 and c1 documentation?
If it is required to use DES guidance, option 2 will be followed, which consists on considering upstream and downstream equipment, we assume upstream refers to all HVAC equipments out of the LEED boundary connected to the Cooling Plant and downstream to all HVAC equipment located into LEED Boundary, including the Cooling Plant (Which is inside the LEED Boundary), Does the Energy Model has to consider the whole project eventhough upstream equipment are located outside of the LEED Boundary?
If it is not required, we were thinking to generate an Energy Model considering only the buildings into de LEED boundary (Hotel and service buildings), a second Energy Model could be generated in order to confirm Space Cooling energy consumption of the rest of the buildings located outside of the LEED boundary and then include this energy consumption on the first Energy Model as a process load. Is this strategy correct?
Thank you very much,
Regards.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
February 17, 2014 - 11:27 am
Under LEED 2009 the DES is optional.
Under Option 2 you include the upstream equipment.
No you do not model a process load for the buildings on the plant outside the boundary. You simply model the chilled water as purchased energy. The baseline varies depending on whether you are applying ASHRAE 90.1-2007 Addendum ai or not.
JOSE R. TAGLE
COMMISSIONING & LEEDAKF GROUP
2 thumbs up
February 19, 2014 - 2:24 pm
First of all, thank you for your comments Marcus, however, I´ve got one more question regarding purchased energy.
The situation is that the Project will not purchase the energy because Chilled Water Plant (located into de LEED boundary) will belong to the Resort.
Do I still need to model Purchased Energy?
Thanks Again
Regards
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
February 19, 2014 - 2:36 pm
You model it as if it were purchased energy even though you will not technically be buying it. The rate to use would be the resort's cost to produce the chilled water.