84th and Highway 2 Wind Study

Bergey XL.1
The installed and operational Bergey XL.1
More Photos

Welcome to the City of Lincoln's 84th and Highway 2 wind power study website. This groundbreaking alternative energy study is a joint venture between the City of Lincoln and the University of Nebraska-Lincoln. The purpose of the study is to investigate alternative energy sources for the city's traffic signals as part of a "Cleaner Greener Lincoln."

Q: What is the purpose of the wind turbine and solar panels at 84th and Highway 2?
A: A wind generator and solar panels were installed on the traffic signal at 84th and Highway 2 in December 2010 to produce electricity to power traffic infrastructure. The goal is for the installations to produce more energy than the traffic signal consumes.
Q: How much power can the wind turbine generate?
A: At a peak windspeed of 29 mph the wind generator can produce 1300 watts of power. If the wind speed rises above 29 mph the wind generator automatically turns, or "furls," its blades away from the wind to prevent damage. Unfortunately, this "furling" also reduces the power produced by the wind turbine.
Q: How much power can the solar panels generate?
A: Each solar panel is rated at 210 watts, so the total theoretical power production from the two panels is 420 watts. Due to the angle of the sun, clouds, dust and many other atmospheric considerations, the output of the solar panels is significantly less, and of course, no power is produced at night.
Q: How much power does the intersection use?
A: On an average day the intersection draws approximately 450 watts.
Q: What is the maximum wind speed the wind turbine can withstand?
A: The wind turbine is rated for a maximum wind speed of 120 mph.
Q: What happens if more power is produced than the intersection needs?
A: In the event that the wind turbine produces more power than the intersection needs, any excess power is sold back to the grid causing the power meter to "run backward."
Q: Who is involved in the study?
A: The study is a joint project between the City of Lincoln, the University of Nebraska Transportation Center, and the University of Nebraska Electrical Engineering Department.

List of equipment:

  • 1 x Bergey BWC XL.1 24VDC wind turbine
  • 2 x Sanyo HIP-210NKHA6 210 watt solar panels
  • 1 x Outback power GVFX3524 grid interactive inverter/charger
  • 1 x Outback power "Flexnet DC" battery monitor
  • 1 x Outback "Mate" System display and controller
  • 4 x PVX-3050T 304 Ah 6V batties
  • 1 x greenHouse Computers greenMonitor Lite data logger
  • 1 x Modified traffic signal pole
  • 1 x Salvaged traffic cabinet (to house all the study equipment)

Cleaner Greener Lincoln

Special thanks to:

  • Jon Dixon with Dixon Power Systems
  • Commonwealth Electric
  • Julie Haugh with greenHouse Computers