Saturday, December 1, 2012

Notes - Chapter 15 Summary

The following notes are taken from Wind Turbine Technology by Ahmad Hemami.
  • It is important to know the possible effects on the environment
  • main reason for offshore wind farms are environmental concerns
  • Turbines
    • causes sound pollution, characterized by frequency
    • Infrasound is low frequency, not audible by humans
    • turbine is far enough that we cannot hear it, it does not have adverse sound effects
  • Obstructs View
  • Modern Turbines also constructed for aesthetics to eliminate view complaints
  • Flashing is the cyclic reflection of sunshine on turbine blades
  • Flickering is the cyclic moving shadow cast by turbine blades
  • Birds and Bats can be slain by turbine
    • less than deaths caused by house cats so not often complained
  • A wind farm must not be developed where the ecosystem of natural habitants can be disrupted
  • Wind Farms can also interfere with communications depends on the location of turbines and transmitters
  • Offshore wind turbines about 30-40 miles out to sea
    • Electricity distribution requires cables to be installed under the seabed
    • HVDC High Voltage Direct Current preferable for offshore wind farms but more expensive
    • shallow water can be fixed to seabed, deep water must be floating

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