Transcript Best Practices: Wireless Lighting Controls Retrofit

UC/CSU/CCC Sustainability Conference
Cal Poly San Luis Obispo, 2008
The Best Practice Awards Program is created by the UC/CSU/IOU
Energy Efficiency Partnership Program and funded under the auspices of
the California Public Utilities Commission
AIA CONTINUING EDUCATION
The UC Project Management Institute is a Registered Provider
with The American Institute of Architects Continuing Education
Systems. Credit earned on completion of this program will be
reported to CES Records for AIA members. Certificates of
Completion for non-AIA members are available upon request
([email protected]).
This program is registered with the AIA-CES for continuing professional education.
As such, it does not include content that may be deemed or construed to be an approval
or endorsement by the AIA of any material of construction or any method or manner of
handling, using, distributing, or dealing in any material or product. Questions related to
specific materials, methods and services will be addressed at the conclusion of this
presentation.
WIRELESS LIGHTING CONTROLS RETROFIT
• UC Berkeley
• Lighting Design / Retrofit
Best Practice Award
• Raul Abesamis
Energy Engineer
Physical Plant-Campus Services
Photo by Rob Johnson - Copyright 2008 UC Regents
PROJECT DESCRIPTION
•
UC Berkeley has always strived for leadership in energy efficiency,
incorporating latest designs and technologies available in the industry in
implementing retrofit projects
•
Participated in wireless lighting controls pilot project funded by
California Energy Commission in 2005 that resulted in over 50% energy
savings
•
The pilot was used as basis for implementing Partnership Program
projects using the in two libraries where lighting is
estimated to be more than 35% of building electrical use
– Moffitt Undergraduate Library
– Doe Main Library
Photo by Rob Johnson - Copyright 2008 UC Regents
PROJECT DESCRIPTION
• Why focus on lighting?
Campus Electricity Utilization
Unreconciled
5%
Dorms
7%
Controlled Indoor
Lighting
22%
Other Plug Load
4%
Base Indoor Lighting
Controlled Indoor Lighting
Outdoor Lighting
Lab Ventilation
Other Ventilation
Pumping, compressors
Lab Plug Load
13%
Servers/ac
3%
PCs
2%
Air-conditioning,
general
2%
Pumping,
compressors
3%
Base Indoor Lighting
7%
Air-conditioning, general
PCs
Outdoor Lighting
1%
Servers/ac
Lab Plug Load
Other Plug Load
Dorms
Other Ventilation
7%
Lab Ventilation
24%
Unreconciled
PROJECT DESCRIPTION
MOFFITT LIBRARY PROJECT
•
Two floors (combination of stacks
& reading desks/carrels) totaling
approximately 30,000 sq. ft.
•
Lighting in open area floors divided into
bays with continuous rows of singlelamp F32T8 fixtures with optical reflectors
•
Lights previously operated 24/7 with ON/OFF
controls only through circuit breakers
for each bay located in electrical closets
PROCESS
MOFFITT LIBRARY PROJECT
•
Light controllers (relays) installed at
beginning of each row to independently
control all ballasts in each row
•
Total of 163 controllers installed on
two floors
•
Each controller programmed to switch ON and OFF
lights based on variable library occupancy schedule
•
Wireless gateway installed to allow scheduling changes and monitoring
PROCESS
MOFFITT LIBRARY PROJECT
•
Light controllers (relays) installed at
beginning of each row to independently
control all ballasts in each row
•
Total of 163 controllers installed on
two floors
•
Each controller programmed to switch ON and OFF
lights based on variable library occupancy schedule
•
Wireless gateway installed to allow scheduling changes and monitoring
ACCOMPLISHMENTS
MOFFITT LIBRARY PROJECT
•
Completed August 2007
•
Savings/economics:
•
•
•
•
•
Project cost $22,250
100 MWh/year
$9,000/year @ $0.09/kWh
2.5 year simple payback before
incentives
Instant payback after incentives
PROJECT DESCRIPTION
DOE LIBRARY PROJECT
•
40 high-output 8’ fluorescent
lights above skylights
•
Lights operated 24/7, controlled
only from breakers located in
attic space
PROCESS
DOE LIBRARY PROJECT
•
Controllers installed in each
two-lamp high output fixture
•
Lights programmed to operate
only after sunset and only when
library is occupied
RESULTS
DOE LIBRARY PROJECT
•
Completed January 2008
•
Estimated savings = 70 MWh
per year
•
0.9 year simple payback before incentives (instant
payback after incentives)
TECHNICAL INFORMATION
•
The controllers are installed inside the light fixtures by removing the
ballast cover, removing two wire nuts that connect he ballast and
connecting the controller between the main power and the ballast.
•
Each controller has two independent relays with 5 amps capacity
•
Universal voltage (120/277 volts)
•
Lighting maintenance technician
can install a controller in 5-10 minutes
BARRIERS/LESSONS LEARNED
•
Power supply for controller initially
had problems in 277-volt application.
High voltage spikes for 277-volt
application. Corrected with replacement of controller film resistor with
wire-wound resistor (design modification)
•
Controllers do not have internal batteries for time clock. Gateway resets
clocks in controllers once in a while to maintain reasonable accuracy
BARRIERS/LESSONS LEARNED
•
Existing fixture wiring can vary in many
ways that may impact installation
•
Involve IT department early on in project for required network
connections/communications
TEAM
•
Miguel Labon
Facilities Manager, UCB Libraries
•
Charlie Huizenga
Research Specialist Lecturer / Adjunct Associate Professor
UCB Center for Building Environment
•
Zach Gentry
CEO, Adura Technologies, Inc.
•
Don Link
President, Controlled Energy
•
Alfredo Magana
Lead Building Maintenance Worker , UCB Physical Plant, Support Services
CONTACT INFORMATION
•
Raul Abesamis
– 510-642-6254, [email protected]
•
Charlie Huizenga
– 510-643-5571, [email protected]
•
Zach Gentry
– 415-227-0868, [email protected]
QUESTIONS?
This concludes the American Institute of Architects Continuing Education Systems Program.
Please stop by the Higher Education
Partnership booth for hard copies
of 2007 Best Practice case studies.
Or visit
www.greenbuildings.berkeley.edu/
best_practices.htm to view an online
archive of case studies.