Hello,
We were previously unable to achieve this credit for a project receiving chilled water from a campus central plant employing 4 electric centrifugal chillers and 3 heat recovery chillers. The tonnage for these chillers was originally input as their total capacity, but we would like to reduce that tonnage to just that which is dedicated to our building (the plant serves like 20 buildings). Is it acceptable to take just our building's peak cooling load and distribute this evenly among the chillers for the "Q (tons)" variable? If so, what supporting documentation besides a load calc might be needed? Thanks.
Joyce Kelly
Architect - Cx Provider - Building Performance SpecialistGLHN Architects & Engineers
27 thumbs up
February 28, 2017 - 2:43 pm
Geoffrey: Were you successful in proceeding as you described? Any additional supporting documentation besides load calc?
Tristan Roberts
RepresentativeVermont House of Representatives
LEEDuser Expert
11478 thumbs up
June 5, 2017 - 10:04 pm
I've checked around, and unable so far to find a project that has taken this approach and has insight to offer. I'll keep checking.
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
539 thumbs up
June 6, 2017 - 9:15 am
We've had a number of projects that use a central chiller for cooling. In this case we determine the percentage of cooling capacity dedicated to the LEED project and prorate the central chiller tonnage, refrigerant capacity, etc..