Solar+Light+Tower +Harvey+Mudd .pdf

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Original filename: Solar+Light+Tower_+Harvey+Mudd.pdf
Author: Hana Keller

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Solar Light Tower
Hana Keller
Overview of Project:
Designing, creating, and assessing the validity of a solar powered light tower for the aerial lift company Genie
who currently only builds fuel powered light towers. My team of four students and I presented a design that
includes a generator but runs primarily on solar energy. We also created physical models of our tower and an
electric schematic. We presented our work to the CEO of Genie and the CEO of Terex. The project was also
entered in and won Third place in the technology division at Imagine Tomorrow Energy Challenges
Competition in June 2014
Role in Project:
I acted as the team project manager, bringing together the research and design to create a completed project. I
played a larger role in many aspects of the project than some of my team members and designed and
sketched most of the light tower's physical properties other than the electrical design.
Solar Benefits:
Environmental Benefits:
 No emissions so no air pollution
 No sound pollution
 Renewable energy source
Economic/Marketable Benefits:
 Cheaper than fossil fuels in the long run
 Low maintenance
 Tax credits up to 30 %
 Silent

Fuel powered light towers
consume around 0.40 gallons per
hour and can cost around 6,000
dollars per month just for fuel

Specific Concept Requirements:
 Minimum 1,500 watts LED lighting (can be supplemented with other lights)
 Must have a small generator on board
 Solar Cells must fit on trailer
Design Process:
 Challenges
o Balance generator power and solar panel power
o Provide enough lighting to fully illuminate jobsite
o Meet the weight requirement with a generator on

 Goals
o Be able to power the lights with solar panels during an 8
hour night when located between 35 N to 35 S latitude
(San Francisco to Buenos Aires)
o Usable in adverse conditions
o Flexibility in usable locations

 The scale model replicates the sliding and folding motion of the solar panels when they are opened
 Along with a model there is a light at the top to model the electric system with battery-solar panel
configuration that actually turns on the light and charges to show how it will work
Side View of Tower

Interior View of Tower

Top View of Tower

 This is the schematic for charging the battery with the solar
power and running the light off of both the generator and the
Final Specification:
 Electrical System and Controls
o 24DC- 20 AH AGM batteries
o Auto and Manual Light on/off
 Power
o Solar Panels
 Monocrystalline Panels
 800 – 1,500 Watt power output
 Better energy production
 More expensive
 Single axis swivel
 Adjustable angles
 Follows path of sun during the day (solar tracker)
 Manually set up tilt of panels in accordance to sun’s latitude and time of year
 Retracts, so panels are completely covered to prevent damage when folded
o Batteries
 24 Volt, 4 battery system
 Lithium Ion; long lasting with low charge loss and
o Generator
 Kubota D1105-E3BG
 21.7” L x 15.5” W x 23.8” H
 15.4 hp standby, 13.5 hp continuous
 0.254 kg/kWh
 Lights
o 6 light panels- each gives off 18,000 lumens
o High intensity LED fixtures
o Panels can be manually adjusted
o Day/Night sensor
 Dimensions
o 179 in. x 62 in. x 68 in.
25 feet mast maximum height

Bill of Materials:
Light Panels
Solar Panels
Total Cost


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