Hi, we have development where the Chiller Plant is serving three buildings. Due to of the distance of the building, the Chilled Water pump head is quite high and we required to install Chilled Water pump that bigger than what stipulated at ASHRAE 90.1. Can we use Chiller Water pump as stipulated from ASHRAE 90.1 for both proposed and baseline model? So we are not claiming any energy savings on this component.
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
August 16, 2016 - 12:28 pm
In general no you cannot. The proposed is modeled as designed the baseline according to Appendix G. If the proposed case is worse the model needs to reflect that it is worse. You have to make up the loss in other energy end uses.
That said you might want to look at the District Energy Systems for LEED v2 for guidance on modeling central plants serving multiple buildings and the campus guidance for modeling multiple buildings within a single LEED submission.
Michael Wahjudi
Sustainable Consultant3 thumbs up
August 23, 2016 - 9:45 pm
Hi Marcus, Its really helpful. Another thing that we would like to ask. Our development is cleanroom that having very high process load. Almost 90% of building cooling load is for process cooling. Is there any exceptional method or calculation for us to claim more savings? We have selected the most efficient equipments and would like to obtain the best energy savings possible for our development.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
August 24, 2016 - 10:40 am
Equipment efficiency is a pretty easy one to claim savings. The baseline would be the minimum in 90.1 for the type of equipment used.
There is also a spreadsheet that can be used for the data center equipment itself - http://www.usgbc.org/resources/minimum-energy-performance-data-center-ca...
Michael Wahjudi
Sustainable Consultant3 thumbs up
August 24, 2016 - 8:49 pm
Hi Marcus, apologize forget to mention. The development is cleanroom, hence more than 90% of the building cooling load is for process cooling on the fabrication machine. We noted 90.1 only for fans and pumps, then we can claim savings. Any suggestion? Because we are having big chunk of energy consumption components that is not clearly stipulated.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
August 25, 2016 - 9:16 am
Same suggestion. You can claim savings for the process cooling based on the efficiency of the equipment as an exceptional calculation. You need to establish a reasonable baseline which in many cases can be based on 90.1 minimums. If 90.1 does not cover the equipment used then you will need to figure out how to establish the baseline through some other means.