1. Light Distribution Model (Trace-Pro)
P08428 – LED Lighting Technologies for a Sustainable Entrepreneurial Venture
P08428 – LED Lighting Technologies for a Sustainable Entrepreneurial Venture
Mission
The goal of the project was to design an LED retrofit kit for metal halide walkway fixtures on the RIT campus.
Customer Needs
Use less energy than current system
Provide as much light as current system
Be recyclable
Be vandal resistant
Decrease light pollution
Easy to install and replace
Be economically viable
Withstand outdoor elements
5 Board Retrofit Kit
5 Board Model (Pro-E)
Key Design Specifications
Design Concept
The design is a retrofit kit for existing lighting fixtures. Simulations were performed to determine the optimal placement of the LEDs on the boards and angles at which they should be placed. The back plate and board placement were directed to distribute light only where needed. This can be seen in the 5 Board Pro-E model above. The PC boards can be easily removed for easy replacement. The LED rated lifetime is 50,000 hours.
The figure below shows simulated light distribution from three fixtures over a 12 ft. wide walkway.
Metric
Units
Marginal Value
Ideal Value
Actual Value
Fixture lifetime
years
>25
>30 30
Color Rendering Index (CRI)
none
>65
>80 75
LED lifetime
hours
50,000
100,000
Light density for entire coverage area
ft–cd 1
Power consumption
Watts
<130
<50 60
Color temperature K
3,000–5,400
4,100
Payback period
<15
<7
9.6
Test Plan
A total of 11 tests per prototype were performed. A total of three prototypes were designed. Two key tests were the LED thermal test and light spread test.
Following the first thermal test, the aluminum back plate was expanded for additional thermal management. The transformers were placed on a separate mounting plate to help dissipate heat. From this we can expect to see an extended lifetime. The light spread test of the beta prototype provided light distribution of ½ ft-cd over the designated 80’x12’ walkway.
Thermal Distribution
Light Distribution Model (Trace-Pro)
Analysis
Future Goals
All required tests met or passed specification needs. CO2 emissions decreased by 65% from the metal halide to the LED system. A total annual savings (energy, labor, material) of $ per fixture was obtained. The approximate sale price per retrofit kit is $575. From the initial investment and annual savings, a 9.6 year simple payback period was determined.
The future goals include starting a company for commercialization. The company would complete the final assembly of the retrofit kit while fabrication would be subcontracted. The initial market is the RIT campus. A marketing campaign aimed at other universities would follow.
Shawn Russell (ME, Team Lead) Taylor Shivell (ME)
Arthur Deane (EE)
Phil Pietrantoni (EE)
David Eells (ME)
Christine Lagree (IE)
Advisor: Dr. Robert Stevens (ME)
Campus Light Fixture
Winter/Spring
Thanks to: Lambda Research Corporation, Dave Harris, Catherine Ahern, Bruce Teuscher, Fraen SRL, Jeff Lonneville
Sponsor: RIT Facilities Management Services