solar and wind power mariah negrillo-soor. why use solar energy?? potential to supply energy for...
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Solar and Wind PowerMariah Negrillo-Soor
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WHY USE SOLAR ENERGY??• Potential to supply energy for full year• BUT it’s expensive $$$ + difficult to store in large amounts• Reduce heating costs
learn more http://www.youtube.com/watch?v=NDZzAIcCQLQ
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HOW?• Daylighting: buildings with a lot of windows = natural light =
low heating + electricity bills• Photovoltaic cells (energy storage like a car battery) absorb
direct sunlight, convert to electricity
WOWW
So many windowssssss
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HOW?• Solar Towers: • Thousands of mirrors direct sunlight/energy @ tower which heats
a liquid to steam • Drives turbines; generate electricity
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POTENTIAL VS. PROBLEMS• Could be greatest energy source BUT:• Need to find a way to concentrate, store, and make accessible• Produce little to no energy on rainy/cloudy days• Gov’t not into high costs, yet still subsidize or fund the use of
fossil fuel
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NEW IDEAS• Cells compress + pump air into underground caves use to
drive turbines• HOT SALT: mirrors heat fluid in pipes heats molten salt;
retains heat use heat to produce steam steam powers turbines
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TRANSPORTATION
• AC lines (alternating currents):• Loses power over long distances
• DC lines (direct current)• Doesn’t lose power over long distance• Expensive; as demand increases price decreases
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OKOTOKS, AB• Solar panels heat glycol
solution• Solution flows through
pipes in home• Goes through more
pipes to Energy Center• Heat transfers to water• Cycle begins again• **EXCESS HEAT STORED
UNDERGROUND FOR WINTER**
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WIND u feel it
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WHY?• no CO2 omissions• no acid rain• Renewable• http://www.youtube.com/watch?v=niZ_cvu9Fts
Futuristic + pretty = WOWWW!?!
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WIND FARMS• Onshore: fast winds to
get over hills + ridges• = more power• Little habitat destruction• Few trees @ high
elevations• Tall because velocity
higher @ high elevations• (e.g rooftop turbines in
Amsterdam and San Francisco)
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WIND FARMS• Offshore: built on
continental shelves• More dependable no
trees or buildings in the way• Linked with cables to
on shore generation systems• More attractive?
(some peeps don’t like them?)
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FUN FACT
• 2003: plan for wind farm cancelled by Premier Campbell (Liberals)• Favour private development• This prevents BC Hydro from producing new power• Wind power $$$ at first; private companies need
incentives; not willing to compete with BC Hydro
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Wind Farms in BC• Clean Energy Act passed in 2010:• BC Hydro promises to buy energy from wind farms + other clean
energy projects• Haida Gwaii: off shore farm proposed 2009 BC Hydro decides
NOPE• But proposal for Tumbler Ridge farm in 6 years
Bear Mountain Wind Farm in Dawson Creek, BC
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Wind Farms in Canada• Largest just outside of Toronto• Some in Quebec, Alberta, Saskatchewan, and Manitoba
St. Joseph wind farm in Manitoba = one of the largest in Canada!
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Wind Farms in World• Growing on people fossil fuel = $$ (no good)• Many advantages• BOOM in wind power = low cost• High demand = low price• **Encourages economic growth**• E.g offer money ($3-5000) to farmers to build on property
Can humankind learn to coexist with nature ?!?
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NOT PERFECT• Not “aesthetically” pleasing; noisy (??)• Blades can kill birds + bats• May not be windy when needed use with another energy
source (*coughcough* solar)
Careful little birdies
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BLEAK FUTURE IF WE CONTINUE TO RELY ON
FOSSIL FUELS
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