alternative energy 12/1/10 - university of california, san … · 2010-12-02 · alternative energy...
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Alternative Energy 12/1/10
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NOTE: 100 Qbtu/year = 3.35 TW
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Lots of energy associated with evaporation: both mgh (4% for 10 km lift) and latent heat (96%) of water
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Question A PV cell is:
A. Like a battery that is charged by the Sun
B. Uses silicon, one of the most common elements on Earth
C. Typically converts up to around 15% of the Sun's energy into electricity D. Takes more energy to make that it can produce over its lifetime E. All of the above except D
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Question Hydroelectricity is:
A. A renewable energy source with few drawbacks except that there is not enough of it B. Has great potential to fill much of future U.S. energy needs C. Typically converts up to around 15% of the potential energy into electricity D. Is currently the cheapest source of electricity for California E. Both A and C
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Participation Question (Write on paper and turn in, for class participation credit)
1. Name the one or two most interesting things you've learned in the class so far.
2. Name the least interesting topic we've covered (if you can remember it!)
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15 Several Megawatt wind power machine
Coast Guard Eagle
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American multiblade Darrieus rotor
Dutch 4-arm
Modern 3 blade (palm springs)
High speed 2 blade
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note that average solar insolation is about 150–250 W/m2
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Question Which energy source do you think will play the largest role in the future when fossil fuels either run out or are limited by climate change concerns?
A. Wind power B. Ethanol and other bio-fuels C. Solar energy D. Geothermal, waves, and tidal energy E. nuclear
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32 Thanks to T. Murphy
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We don’t have this much arable land! And where do we grow our food?
Thanks to T. Murphy
Land needed to replace Current U.S. oil energy
Green: corn ethanol
Yellow: Solar photo-voltaics: (all US energy, not just oil!)
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Question Which energy source do you think will play the largest role in the future when fossil fuels either run out or are limited by climate change concerns?
A. Wind power B. Ethanol and other bio-fuels C. Solar energy D. Geothermal, waves, and tidal energy E. nuclear
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Clogged highways and frustratingly waiting while your gas needle plummets to empty usually doesn't conjure up thoughts of green, but it seems like these very roads could become the source of a lot more energy. Several recent student designs have proposed that major roadways be retrofitted with various forms of wind energy collection devices, ranging from overhead turbines that collect energy from quickly-moving cars below to barrier panels (pictured after the jump) that harness the wind from closely passing vehicles moving in opposite directions. Ideally, the wind energy could then be sent back out to the grid to power nearby communities, light-rail transportation systems, or even intelligent billboards. Of course, most of these ideas are still in the research phase, and even if proven feasible, we can't imagine the up-front costs (or inconveniences of installing these things) to be minor, but we're sure that government subsidies should be able to to lend a helping hand.
Good idea? a. Yes b. No c. Not clear
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ENCINA
SOUTH BAY
OLD TOWN
PENASQUITOS
TO TIJUANA
MIGUEL
ESCONDIDO
TALEGA
MEXICO
MISSION
SAN ONOFRE
SAN LUIS REY
SYCAMORE CANYON
GLENCLIFF
DESCANSO
BARRETT
CAMERON TO
BOULDER CREEK
SANTA YSABEL
CREELMAN
LOS COCHES ALPINE
LOVELAND
NARROWS
WARNERS
BORREGO
POWAY
POMERADO
ESCO
RINCON
LILAC
ASH
VALLEY CENTER
IMPERIAL CO.
RIVERSIDE CO. ORANGE CO.
SAN DIEGO CO.
BOULEVARD
CRESTWOOD
CAPISTRANO
TRABUCO
LAGUNA NIGUEL
MARGARITA
CRISTIANITOS
MAIN STREET IMPERIAL VALLEY
MONSERATE
PALA
ENVIREPEL
Existing Major Generation Plants Existing 230 kV Substation Existing 69 kV Substation Existing 138 kV Substation Future Generation Plant Existing Generation Plant Transmission Line Upgrade New Transmission Line or Line Section Existing 500 kV Transmission Line Existing 230 kV Transmission Line Existing 138 kV Transmission Line Existing 69 kV Transmission Line County Boundaries
Note: Map not to scale
PALOMAR ENERGY
OTAY MESA
SOUTH BAY 69kV
MONTGOMERY 69kV
SWEETWATER 69kV
OTAY LAKE TAP
OTAY
Electricity Infrastructure in San Diego
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Collision between energy needs and water needs
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