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Demonstrating LED and Fiber Optic Lighting in Commissary Applications
Joseph KonradeEnergy Technology Program SpecialistFederal Energy Management Program
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GOAL OF THE PROJECT• Promote New Lighting Technology• Document Energy Savings • Duplicate the technology • Expand Alternative Financing Opportunities • Include Lighting Technology in Government Projects
within Utility Service Territory
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History• FEMP sponsored E4 audits• Audit designed to review Utility Cost, Operations and Maintenance,
New Technology Application• 3 Defense Commissary Agency (DeCA) received services under the
agreement with DOE• Fort George G Meade pays a high electricity rate Electricity cost
$0.171/kWh (PWC sub-metered rate)• Commissary was previously unmetered
– Meter installed during installation of lighting project. New meter showing higher consumption than previously estimated
• New EPACT and EISA energy goals
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E4 Audit Leads to Pilot Projects• DeCA elected to pursue 3 pilot lighting projects• Fiber optic lighting for reach-in display freezer cases• LED lighting for large storage freezer• LED lighting for loading docks• Other systems still under consideration
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Issues DeCA Wanted Resolved• Unfamiliar with technology
– Wanted savings independently validated– FEMP sponsor of technology demonstrations
• Procurement mechanism– Energy Focus products not in GSA or DLA catalogs
• If systems proved successful– DeCA would consider changing design standards– DeCA would consider UESC and ESPC for replication
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Storage Freezer—Before• 36 globe fixtures• 100-watt, A-line,
gel-coated, incandescent lamps
• 1,000-hr life• 24 x 7 operation• -15°F room
temperature
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Storage Freezer—After• 36 new globe fixtures• 15-watt LED• 6500K CCT• 50,000-hr life (5.7 yr)• 85% power reduction• 3.6 kW removed from
refrigerated space• Site reports -3°F
cooler in space• Reduced M&O
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LED Globe Lights• Cost $14,400• Savings $4,561/year (26,659 kWh/yr)
– Additional savings in materials and labor costs– Maintenance contractor realizes M&O savings– Excludes reduction in refrigeration load*
• Payback 3.2 years* Concluded refrigeration controls need to be recommissioned
based on monitoring
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Reach-in Display Cases—Before• 79 illuminated doors• 87 HO fluorescent
60-watt lamps• Mix of 3500K and
4100K CCT• -5 to -10°F case
temperatures• Commissary uses top
of cases for promotional displays
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Reach-in Display Cases—After• Removed light heat source
from refrigerated space
• Reduced lighting power and energy
• Reduced illumination on product
• Change in light color
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Fiber Optic Lighting
• Features of the Fiber Optic System
Fiber OpticCables
Acrylic Rods(Luminaires)
Metal HalideRemote Light Source
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Reach-in Display Cases—After• 28 metal halide
70-watt source lights• Lighting power reduced
to 2281 Watts from 4968 Watts (54%)
• 6500K CCT (DeCA standard is 3500K)
• Top of display cases still used for promotional material (limited)
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Illumination ComparisonFiber optic (left) Fluorescent (right)
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Fiber Optic Lights• Cost $30,000• Savings $2,253/year (13,168 kWh/yr)
– Additional reduction in labor maintenance requirement– Some increase in annual material (lamp) costs– Excludes reduction in refrigeration load*
• Payback 13.3 years* Concluded refrigeration controls need to be recommissioned
based on monitoring
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Loading Docks—Before• 4 loading docks• 150-watt PAR
incandescent spotlights
• Issues– Short lamp life– Fragile
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Loading Docks—After• 15-watt LED
spotlights• 90% reduction
in power• Resolution
– Long lamp life– Rugged
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Light directed into 40-foot deep trailer at dock
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LED Dock Lights• Cost $1,600• Savings
– Unknown because run-time not documented• Payback
– 17,300 run hours (~2 years at 24x7)
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Conclusions• Refrigerant system savings not detected
– Heat load reduced but unable to verify in LED and Fiber Optic systems
– Refrigerant system controls need to be re-commissioned• Maintenance savings not realized
– Maintenance contract could be renegotiated • LED lights provided reasonable payback
– ESPC/UESC involvement to expand to other commissaries and federal facilities
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Conclusions• LED Globe Lights have been adopted as standard by
DECA• LED Dock Lighting Received Positive Feed Back from store
manger• Fiber optic lights need further documentation
– Energy use reduced (6 light were replaced by 1) – Operations and Maintenance savings not documented– New light color did not match DeCA standard (3500K)– Visual impact (look) and the space for promotional material
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Fiber Optic Lights• Payback could be improved
– If product purchased in bulk reduced overall cost– If refrigeration system re-commissioned and heat load
reduction benefit realized– If M&O savings realized by commissary instead of
contractor
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Acknowledgements• Defense Commissary Agency (DeCA)
E. Carroll Shepherd III• Energy Focus, Inc.
Mike Weber, Dave Bina and Roger Buelow
• Pacific Northwest National Laboratory Bill Sandusky and Steven Parker
• FEMP E4 program
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New Items to Note
Website address for light publications. Location: http://www1.eere.energy.gov/femp/information/publi cations.html#lighting