+ All Categories
Home > Documents > LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce...

LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce...

Date post: 31-Aug-2020
Category:
Upload: others
View: 2 times
Download: 0 times
Share this document with a friend
37
CITY OF ST. CLOUD LED LIGHTING 2014 League of Minnesota Cities Steve Lawrence & Blake Redfield
Transcript
Page 1: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

CITY OF ST. CLOUD –LED LIGHTING

2014 League of Minnesota Cities

Steve Lawrence & Blake Redfield

Page 2: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce glare to the motorist Improve pedestrian and residential security Reduce street light outage times Minimize light trespass onto private properties Become more dark skies compliant

Page 3: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

LED Street Light Installation Considerations Quality of light & fixture Complexity of the LED light source Cost effectiveness of fixtures Implementation process Complete Staggered

Ownership methods Organization purchasing fixtures Allow outside investors to purchase & reap benefits of

energy (cost) savings When to get aboard the LED street lighting world

Page 4: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

LED Lighting Basics

Page 5: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Driver: Converts AC to low

voltage DC

Door:Protects against weather, insects,

creatures

Door Clamps:Secures Door

Fixture Clamps:Secures Fixture

to Pole

Surge Suppressor:Protects Driver from

Voltage Surges

Terminal Block: Electrical Connection to

AC Power Source

Labels:Provide

certifications and model numbers

Body: Provides support for LED circuit board and

cooling for the LED’s

LED:Small Solid State Device

that Emits Light

LED Lens*:Directs Light for even Distribution and

Various Distribution Types

*Note: Some fixtures use mirror arrays to direct the light rather

than an LED lens

LED Light Engine

Page 6: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Efficacy Lumens of light / Watt of electricity Efficiency of driver Spectral efficiencies

Cool color temperatures Higher output levels Lower color rendering indexes

Warm color temperatures Lower output levels High color rendering indexes

P-N junction temperature efficiencies LED efficiencies drop as temperatures rise above normal levels

Delivery system efficiencies Lens losses Reflective losses Aiming losses

System losses can exceed 30% of potential light output when any of the components have losses or are not matched to the system2

Page 7: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Department of Energy’s Projections of LED Efficiencies1

Page 8: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

LED Efficiencies since 2005

2005

•60 lm/wt•Baseline

2015

•190 lm/wt•+315%

2025

•266 lm/wt•+443%

Average of 10.3% increase per year for 20 years.

Page 9: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

The St. Cloud LED Street Lighting Story 2010 awarded ARRA funds for LED lighting

projects Developed test methodologies for street lights Developed plans and specifications for light

fixtures that passed our test criteria 2010-2011 installed lighting systems on Kilian

Boulevard and Riverside Drive

Page 10: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Kilian & Riverside LEDStreet Light Project Location

Page 11: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Street lightstyle along Kilian Blvd & Riverside Drive

Page 12: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Problems Encountered when Reviewing Decorative LED Street Lights Photometric files did not always match real world

testing Shadows were a major problem at the base of light

poles Electrical power consumption measurements were

not consistent Thermal management varied considerably from

fixture to fixture Quality of the fixture materials and ability to do

maintenance varied from fixture to fixture Was the LED color temperature correct with the

manufacturer’s claims?

Page 13: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Solutions for Reviewing LED Street Light Fixtures Develop a standard battery of tests that every street

light sample would go through Develop a test lab for performing the battery of tests Develop an evaluation methodology for each of the

LED fixtures Develop visual photometric modeling that would

better illustrate the light outputs of the LED fixtures than traditional modeling

Make fixture reviews as objective as possible

Page 14: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Test Deck

Page 15: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Konica Minolta Light Meter & Self Aligning Shoe

Page 16: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Data Collected & Inputs from Testing / Review Measure footcandles

at 64 points on test deck

Measure CCT at 64 points on test deck

Measure thermal temperature of heat sink unit

80 & 90 degree cut-off level measurements

Rate workmanship Rate quality of materials Rate finish/coating Rate electrical component

replacement Rate diffuser replacement Rate product standards Rate warranty Rate driver components Rate LED components

Page 17: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Data Input and Report Form

Page 18: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Two Dimensional Photometry Model from Test Deck

Page 19: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Three Dimensional Photometry Model from Test Deck

Page 20: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Predicting Light Levels from Pole Height

Page 21: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Color Temperature Distribution

Page 22: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

LED Upgrade StatisticsOriginal Lighting Updated LED Lighting Kilian Boulevard 110 - 70 watt twin HPS fixtures

on 12’ poles

Riverside Drive 50 – 100 watt HPS fixtures on

9’ poles

Minnesota Boulevard 28 – 100 watt HPS fixtures on

12’ poles

Kilian Boulevard 55 – 66 watt single LED fixtures

on 12’ poles

Riverside Drive 50 – 35 watt LED fixtures on

9’ poles

Minnesota Boulevard 28 – 66 watt HPS fixtures on 12’

poles

Reduced power consumption 51% from 15,500 watts to 7,560 watts.Entire project cost was approximately $263,000.

Page 23: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

LED Fixture StatisticsKilian Boulevard

Sternberg

Old Town Series

3500K CCT 3300 lumens

Type V Dist.

66 Watts Qty: 55

Riverside Drive

Sternberg

Roadway Series

3500K CCT 1130 lumens

Type III Dist.

34 Watts Qty: 50

Minnesota Boulevard

Sternberg

Old Town Series

3500K CCT 3160 lumens

Type III Dist.

66 Watts Qty: 28

Page 24: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Conclusions of Kilian & Riverside LED Lighting Project

Positives Negatives

Significant decrease in electrical costs

Significant reduction in maintenance

Much better quality of light Much better light levels

A couple of residents along Kilian Boulevard complained about losing the twin fixtures from an aesthetics standpoint

A couple of residents along Kilian Boulevard complained that the light is now too bright

Page 25: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Additional LED Test Equipment

Page 26: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Color Checker

Page 27: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Light FixtureLift Tower

Page 28: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Spectrum Analyzer

Page 29: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

The Future of LED Street Lighting in St. cloud

Page 30: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

City of St. Cloud Develop has developed a cost analysis on a 100% LED change-out program over a 40 year timeframe Five year phase in plan LED expected light fixture life of 20 years Assume 1% annual increase in electrical costs Assume 2% annual increase in maintenance costs Assume 5% annual increase in LED efficiency Assumes cost reduction in light fixtures over time Assumes significant maintenance reduction costs Creates an $18.5 million dollar savings in 40 years

Page 31: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

$0.00

$200,000.00

$400,000.00

$600,000.00

$800,000.00

$1,000,000.00

$1,200,000.00

$1,400,000.00

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

Electrical Costs With LED Replacement Program

Electrical Costs Without LED Replacement Program

Maintenance and install costs with LED Upgrades

Maintenance Costs without LED Upgrades*

Total of Maint & Elect. With LED Upgrades

Total of Maint. & Elect. Without LED Upgrades

LED Street Lighting ProgramCity of St. Cloud

Period of 40 years

Years

Electrical costs without LED upgrades

Electrical costs with proposed LED program

Total of LED replacement, Maintenance & Electrical

Costs

Maintenance Costs without LED Upgrades

Maintenance and installation costs with

LED replacement

Total Projected Savings in 40 Years with Proposed LED Upgrades: $18.5 Million

Total of Maintenance & Electrical Costs without

LED replacement

Page 32: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Other St. Cloud LED Street Lighting Projects

Page 33: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Parking Ramp LED Upgrade

Page 34: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Smart Dimming Park-N-Ride Lot

Page 35: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Central Maintenance Building LED Street Lighting and Exterior Lighting Upgrade

Page 36: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

St. Cloud Water Plant LED Exterior Lighting and Street Lighting Upgrade

Page 37: LED LIGHTING - Clean Energy Resource Teams...City of St. Cloud LED Street Lighting Goals Reduce electrical costs Reduce maintenance costs Provide high quality roadway lighting Reduce

Articles Cited

1,2. U.S. Department of Energy, Energy Efficiency of LEDs, PNNL-SA-94206, March 2013


Recommended