[Equest-users] Baseline Lighting Power/Schedule

[Bishop, Bill]

Hi Brett,
 
I agree with your interpretation (1.), below, for the baseline. Then you
apply the Table G3.2 power adjustment to the proposed building for
spaces that have occupancy sensors, as described in Table G3.1, No
6(g)., using the same lighting schedule as the baseline but with the
as-designed lighting power.
 
Regards,
 
William Bishop, EIT, LEED(r) AP | Pathfinder Engineers & Architects LLP
Mechanical Engineer
 
134 South Fitzhugh Street
Rochester, NY 14608
T: (585) 325-6004 Ext. 114
F: (585) 325-6005
bbishop at pathfinderengineers.com
www.pathfinderengineers.com
P Please strive to live sustainably.
________________________________

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Brett
Fero
Sent: Thursday, August 27, 2009 12:50 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Baseline Lighting Power/Schedule
 
I would like the opinions of others regarding the interpretation of the
Baseline Building Performance Lighting of Table G3.1 in Appendix G.
 
Table G3.1, Item 6.  Baseline Lighting, last sentence states the
following;
 
"No automatic lighting controls (e.g. programmable controls or automatic
controls for daylighting utilization) shall be modeled in the baseline
building design, as the lighting schedules used are understood to
reflect the mandatory control requirement in this standard."
 
I am questioning 2 ways to interpret this in the model.  I will use a
10,000 sf office building with typical business hours of operation  from
8 am to 6 pm.  Most spaces are required to have automatic lighting
controls as specified in the Mandatory Provisions of Section 9.4 (ASHREA
90.1).
 
1.        The Baseline lighting schedule would typically ramp up
starting at maybe 6 am, dip for lunch, and ramp down until maybe 8 pm?
The maximum power density would be that allowed using the space-by-space
method and Table 9.6.1 in ASHRAE 90.1.
 
2.       The Baseline lighting schedule would ramp up starting at maybe
6 am, dip for lunch, and ramp down until maybe 8 pm (typical
scheduling)?  The maximum power density would be that allowed using the
space-by-space method and Table 9.6.1 in ASHRAE 90.1. with the 10% Power
Adjustment factor of Table G3.2 applied to the lighting demand of spaces
required to have mandatory controls of Section 9.4.
 
I have typically used option 1 without question from the USGBC which
increases savings, but was wondering how others have interpreted it.
 
 
Are occupancy sensors  "programmable controls" - delay time?
 
Thanks
 
Brett Fero, P.E., LEED AP
Syracuse, NY 13212
Phone:   315-445-2650
Fax:  315-445-0958
bfero at robsonwoese.com
 
 
________________________________

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