Energy harvesting on highway bridges.

Details

• Creators:
  Baldwin, J. David ; Roswurm, Samuel ; Nolan, Justin ; Holliday, Lisa
• Corporate Creators:
  University of Oklahoma. School of Aerospace & Mechanical Engineering
• Subject/TRT Terms:
  • Traffic loads
  • Piezoelectric materials
  • Renewable energy sources
  • Bridge bearings
  • Electric power generation
  • Highway bridges
  • Bridges--Bearings
  • Electric power production
  • Piezoelectric materials
  • Renewable energy sources
• Publication/ Report Number:
  FHWA-OK-11-01
• Resource Type:
  Tech Report
• Geographical Coverage:
  Oklahoma
• Edition:
  Final report.
• Corporate Publisher:
  Oklahoma. Dept of Transportation
• Abstract:
  A concept for harvesting energy from the traffic-induced loadings on a highway bridge using piezoelectric ; materials to generate electricity was explored through the prototype stage. A total of sixteen lead-zirconate ; titanate (PZT) Type 5A piezoelectric wafers 0.080 inch (2.0 mm) thick were attached to the steel shims of a ; six-layer bridge bearing; 60-durometer rubber sheets separated the shims. The outputs of the piezoelectric ; wafers were each sent through 480-ohm load resistors, and the voltage drops across the resistors were ; measured to estimate instantaneous power output and overall energy generation. ; The prototype energy harvesting bridge bearing was subjected to cyclic force loading (square wave) with ; mean load, load amplitude, and loading frequency being the experimental parameters. The highest observed ; energy generation of 1.253×10-6 W·hr occurred with a mean load of 10 kip (44.5 kN), a load amplitude of 4 ; kip (17.8 kN) and a frequency of 1.5 Hz. ; The concept of generating electric power from a piezoelectric-wafer-equipped bridge bearing was proven, but ; the energy generated was well below what would be required to operate a modest electrical load.
  More +
• Format:
  PDF
• Funding:
  ODOT SPR Item Number 2224
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/25594/dot_25594_DS1.pdf
• File Type:
  [PDF - 1.23 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:747dc608b7a6d16436d4545b703920c9633ce99cbe86b52522e082bc35412f93cb18955f59633fe4d5017de7f9787a3f4a75df39a0d1600cf60566d5f7ab2150