Hello All,
I am currently working on several process intensive buildings. The
mechanical systems and corresponding control strategies that are being
designed are ideal for achieving 30%-40% savings in a standard office
building but I'm afraid that the common denominator, the high process
loads, will significantly reduce my projects savings. Has anyone
successfully submitted for a reduction in process load. If so, what/how
did you document the reduction?
Thanks for your time.
Seth Spangler, LEED(r) AP
We have documented this on two projects - in both cases we had to
document what the industry standard for the process would be and then
how ours was more efficient. One was related to conveyor energy usage
and the process integrator documented the expected savings based on
numerous other installations they had done over the past few years. The
second one was the process energy associated with refrigeration -
through team member networking we surveyed approximately 200 owners of
buildings of a similar scope and use to document the baseline
refrigeration system that a building of that type would use. Then we
documented how our system was different and more efficient.
In both cases this was approached with the alternative calculation
methodology of ASHRAE 90.1 and that section of the LEED template. Hope
that helps!
JEREMY R. POLING, PE, LEED AP
Jeremy,
Did you file a CIR and get approval from USGBC before pursuing this, or did you just assume USGBC would accept your logic? From where I was raised, modifying process loads is forbidden territory. I'm thinking it would be best to get CIR approval first.
Glad this worked out for you though.
Mark Prince LEED(r) AP
Team,
The project shows the following energy consumption/cost distribution
details.
Space Cool - 27%
Heat Reject. -1%
Vent. Fans -9%
Pumps & Aux.-6%
Ext. Usage -0%
Misc. Equip.-38% (office equipment's, lift,elevators, fire water pumping
system loads,etc)
Area Lights -19%
Question1:-
The proposed model shows savings in all areas except Misc equipment's.
However we are not getting the required savings due to large Misc
equipment loads.
We are thinking of altering the schedule of Misc equipment by providing
some control logic/best practices to get the required savings.
Is it acceptable ? If yes, what needs to be done in terms of
documentation?.
Question2:-
Is it acceptable by the LEED if the process/misc energy is kept at 25%
irrespective of actual Misc loads?.
Thanks for your valuable input.
Regards,
Kathiresan
Mark Prince
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08/06/2010 03:02 AM
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Re: [Bldg-sim] LEED Process Energy Reduction
Jeremy,
Did you file a CIR and get approval from USGBC before pursuing this, or
did you just assume USGBC would accept your logic? From where I was
raised, modifying process loads is forbidden territory. I?m thinking it
would be best to get CIR approval first.
Glad this worked out for you though.
Mark Prince LEED? AP