Solar and Wind Power Mariah Negrillo-Soor. WHY USE SOLAR ENERGY?? Potential to supply energy for...
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Transcript of Solar and Wind Power Mariah Negrillo-Soor. WHY USE SOLAR ENERGY?? Potential to supply energy for...
Solar and Wind PowerMariah Negrillo-Soor
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
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
HOW?• Solar Towers: • Thousands of mirrors direct sunlight/energy @ tower which heats
a liquid to steam • Drives turbines; generate electricity
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
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
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
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**
WIND u feel it
WHY?• no CO2 omissions• no acid rain• Renewable• http://www.youtube.com/watch?v=niZ_cvu9Fts
Futuristic + pretty = WOWWW!?!
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)
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?)
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
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
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!
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 ?!?
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
BLEAK FUTURE IF WE CONTINUE TO RELY ON
FOSSIL FUELS
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