ZERO ENERGY HOUSES -(photovoltaic system )

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ZERO ENERGY HOUSES -(photovoltaic system )

• By Jonathan Tang
• ID20204433
• 4M-A

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Photovoltaic .

• What is it
• System in zero energy homes that generates
  electricity
• Definition
• Direct conversion of light into electricity
• Converted at atomic level
• Principle
• absorb photons of light and release electrons.
• Capture of free electrons creates electricity

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History .

• 1839 -first noticed by a French physicist, Edmund
  Bequerel
• 1905 -Albert Einstein described the nature of the
  photoelectric effect
• 1954 -first photovoltaic module built by Bell
  Laboratories
• 1960 -used seriously the first time by NASA

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Why photovoltaic system? .

• 0 electricity bill
• - save money!!
• Environmentally friendly

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Installation .

• Installed on the roof
• Set at south facing portion
• Reference ww.subiacosustainable.com.au/
  Gallery.cfm

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How it works .

• DC to AC converter is needed for home system
• Reference http//science.nasa.gov/headlines/y2002
  /solarcells.htm

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Cost .

• 1960s
• - around 40,000 a watt of power
• Today
• - from 8 to 10 a watt
• - still expensive

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Special Features .

• will generate electricity in most condition
• Designed to generate excess energy in summer for
  winter

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THE END