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Sam and others, I have a follow-up question related to
your response on 9/25 to purchased chilled water and LEED modeling. I have a baseline building using ASHRAE
90.1 System 1 (PTAC Units). The proposed building is using campus chilled water
and fan coil units or water source heat pumps. Do I use electric as the
source for the PTAC cooling, or the campus chilled water? Using campus chilled
water with PTAC units is not a realistic option, but it seems like 90.1/LEED
requires this (Table 11.3.2A in 90.1-2004)- would USGBC consider this fuel
switching? Also, as a general survey, what are the
going rates for campus chilled water and steam? I have seen ~$0.70/therm
chilled water (generated by absorption chillers) and $0.35/therm for steam for
a college dormitory. I think these rates will vary by campus and end use. Thanks for your guidance in advance. -Jon From: BLDG-SIM@xxxxxxxx
[mailto:BLDG-SIM@xxxxxxxx] On Behalf Of Sam
Mason Yoko, In note 5 under Table 11.3.2A, 90.1-2004
says for systems using purchased chilled water, no chillers shall be modeled
and CHW costs shall be determined using the adopting authority’s utility
rates. For both the baseline and proposed buildings, you would not include
central chillers and instead use purchased chilled water. Sam -- From:
BLDG-SIM@xxxxxxxx [mailto:BLDG-SIM@xxxxxxxx] On
Behalf Of Yoko Matsuyama Hi, everyone, I am modeling a building that is served chilled water from a central
chiller, and the building doesn't have any individual chiller. I am wondering if the baseline model (by ASHRAE
90.1-2004) should follow ASHRAE specified "type and number
of chillers" (TABLE G3.1.3.7, ASHRAE 90.1-2004) depending on building
conditioned floor area, or it should be modeled with a
Central chiller as proposed/designed model. Thank you for your help YM Graduate Mechanical Engineer ==================You received this e-mail because you are subscribed to the BLDG-SIM@xxxxxxxx mailing list. To unsubscribe from this mailing list send a blank message to BLDG-SIM-UNSUBSCRIBE@xxxxxxxx=====================================================You received this e-mail because you are subscribed to the BLDG-SIM@xxxxxxxx mailing list. To unsubscribe from this mailing list send a blank message to BLDG-SIM-UNSUBSCRIBE@xxxxxxxx |