Treatment of shared chiller plant

Scott McMillan

LEEDuser Basic Member

6 thumbs up

June 25, 2015

We have a central chiller plant generating chilled water to serve a hotel and a convention centre. Only the convention centre will be seeking LEED certification under LEED NC 2009. We have a couple of queries: 1. Is it compulsory to account for shared chiller plant and the associated change in part load efficiencies, increased pumping energy etc? It would be more conservative not to account for as part load efficiency would tend to be lower and pumping energy higher as the cooling load increases serving two buildings. 2. If it is compulsory do we need to follow the methodologies in the DESv2 doc or can we construct our own methodology? 3. Is the most recent version of the DESv2 doc the August 2013 publication? Thanks in advance.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4452 thumbs up

Thu, 06/25/2015 - 13:47

1. It depends on the methodology you choose. 2. You have three previously accepted options - DESv2 Option 1, DESv2 Option 2 or ASHRAE 90.1-2007 Addendum ai. Constructing your own methodology is acceptable but far riskier since there is a chance that your methodology may not be accepted. If you create your own I would suggest you get some level of approval through a LEED Interpretation. 3. DESv2 was published August 13, 2010. I am not familiar with an August 2013 version. Do you have a link to it?