Alternative Energy
4/26/11
UCSD
UCSD
NOTE:
100 Qbtu/year
= 3.35 TW
2
1
Alternative Energy
4/26/11
UCSD
Lots of energy associated with evaporation:
both mgh (4% for 10 km lift) and latent heat (96%) of water
3
UCSD
4
2
Alternative Energy
4/26/11
UCSD
5
UCSD
6
3
Alternative Energy
4/26/11
UCSD
7
UCSD
8
4
Alternative Energy
4/26/11
UCSD
9
UCSD
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
10
5
Alternative Energy
4/26/11
UCSD
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
11
UCSD
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!)
3. What would you to spend time on in
class?
12
6
Alternative Energy
4/26/11
UCSD
UCSD
14
7
Alternative Energy
4/26/11
UCSD
Coast Guard Eagle
Several Megawatt wind power machine
15
UCSD
16
8
Alternative Energy
4/26/11
UCSD
17
UCSD
18
9
Alternative Energy
4/26/11
Dutch 4-arm
UCSD
High speed 2 blade
American multiblade
Darrieus rotor
Modern 3 blade (palm springs)
19
UCSD
20
10
Alternative Energy
4/26/11
UCSD
21
UCSD
note that average solar insolation is about 150–250 W/m2
22
11
Alternative Energy
4/26/11
UCSD
23
UCSD
24
12
Alternative Energy
4/26/11
UCSD
25
UCSD
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
26
13
Alternative Energy
4/26/11
UCSD
27
UCSD
28
14
Alternative Energy
4/26/11
UCSD
29
UCSD
30
15
Alternative Energy
4/26/11
UCSD
31
UCSD
Thanks to T. Murphy
32
16
Alternative Energy
4/26/11
UCSD
Land needed to replace
Current U.S. oil energy
Green: corn ethanol
Yellow: Solar photo-voltaics:
(all US energy, not just oil!)
We don’t have this much arable land!
And where do we grow our food?
Thanks to T. Murphy
33
UCSD
34
17
Alternative Energy
4/26/11
UCSD
35
UCSD
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
36
18
Alternative Energy
4/26/11
UCSD
37
UCSD
38
19
Alternative Energy
4/26/11
UCSD
39
UCSD
Good idea?
a.  Yes
b.  No
c.  Not clear
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.
40
20
Alternative Energy
4/26/11
UCSD
41
UCSD
TRABUCO
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
MARGARITA
Electricity Infrastructure in San Diego
CAPISTRANO
LAGUNA
NIGUEL
CRISTIANITOS
ORANGE
CO.
TALEGA
RIVERSIDE CO.
SAN DIEGO CO.
PALA
SAN ONOFRE
MONSERATE
ENVIREPEL
RINCON
BORREGO
WARNERS
NARROWS
SAN LUIS REY
LILAC
ENCINA
VALLEY
CENTER
ASH
ESCONDIDO
SWEETWATER 69kV
SANTA YSABEL
ESCO
PALOMAR
ENERGY
MONTGOMERY
69kV
POWAY
BOULDER CREEK
POMERADO
SOUTH BAY 69kV
IMPERIAL CO.
CREELMAN
PENASQUITOS
SYCAMORE
CANYON
DESCANSO
LOS
COCHES
ALPINE
LOVELAND
GLENCLIFF
MISSION
CRESTWOOD
OLD TOWN
MIGUEL
MAIN STREET
SOUTH BAY
Note: Map not to scale
OTAY
OTAY MESA
BOULEVARD
BARRETT
OTAY LAKE
TAP
TO TIJUANA
CAMERON
TO IMPERIAL VALLEY
42
MEXICO
21
Alternative Energy
4/26/11
UCSD
43
UCSD
Collision between energy needs and water needs
44
22
Alternative Energy
4/26/11
UCSD
45
UCSD
46
23
Alternative Energy
4/26/11
UCSD
47
24