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Solar Power. It’s coming of age. CSP (Concentrated Solar Power). There are two types: Parabolic Troughs and “Power Towers”. Parabolic Troughs. Linear parabolic mirrors focusing light on a tube Very efficient (60\%) utilize salt heated to 1000 degrees Insulated storage for salt

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solar power

Solar Power

It’s coming of age

csp concentrated solar power

CSP (Concentrated Solar Power)

There are two types:

Parabolic Troughs and

“Power Towers”

parabolic troughs
Parabolic Troughs
  • Linear parabolic mirrors focusing light on a tube
    • Very efficient (60%) utilize salt heated to 1000 degrees
    • Insulated storage for salt
    • Then boil water, steam turns turbine, turbine turns generator. Voila! 24 hour solar electricity

also

    • Most have a natural gas boiler integrated into loop, so plant has full production 24 hours/day
slide7
“Solar One” Parabolic Trough in Nevada

64 MW; 400 acres; (15,000 homes)

abengoa solar troughs gila bend az

Abengoa Solar Troughs Gila Bend AZ

280 MW CSP, the largest in the world (70,000 homes supplied—covers 1900 acres), and a second 280 MW plant under construction near Barstow, CA (54,000 homes). On line 2014.

slide10
Greentech Mediafor the latest in . . .well, greentechand from National Renewable Energy Lab—Thermal StorageAnd the California ISO website shows demand and renewable output.
solar one power tower in barstow california
Solar One “Power Tower” in Barstow California

The original solar power tower located in Barstow, California, and completed in 1981. The Solar One had a design capacity of 10,000 peak kilowatts, and was composed of a receiver located on the top of a tower surrounded by a field of reflectors. The concentrated sunlight created steam to drive a steam turbine and electric generator located on the ground.

ps 10 power tower in spain
PS-10 Power Tower in Spain
  • Mirrors focus sunlight onto a small area at top of 300 foot tall tower.
    • Utilize liquid sodium as a fluid to collect and transport heat to boil water, steam turns turbine, turbine turns generator.
    • Power 65,000 homes

Integral is Sevilla PV, an integrated photovoltaic array that will power 1800 homes

slide15
Ivanpah Power Tower—eastern California. First circle is nearing completion. 4000 acres. Towers 500 feet tall. 170,000 heliostats (mirrors)390 MW Equals 140,000 + homes
50 million to relocate endangered desert tortoises there are desert ecosystems no free lunches
$50 million to relocate endangered desert tortoises. There are desert ecosystems--no free lunches
but let s not forget photovoltaic sunlight directly into electricity
But . . . Let’s not forget Photovoltaic—(Sunlight directly into electricity)
  • Western PV panel makers driven out of business by Chinese
  • But, cheap panels make installation cheaper
  • Installation companies go crazy
  • Big investors see good opportunities
  • Solar City stock rises 200% in 2013
    • Solar City model. Install homeowner PV systems for free, then take a portion of output to pay for systems.

PV still less than 1% of US power output, but increased 76% in 2012 bypassing wind for first time.

geothermal energy
Geothermal Energy
  • Most common utilizes very hot water or steam. “The Geysers” in California.
  • About 30 square miles active site.
  • About 1000 MW continual output.
enhanced geothermal systems got hot rocks
Enhanced Geothermal Systems:Got Hot Rocks?
  • AltaRock Energy Inc. at Newberry Volcano near Bend.
  • Drill one hole into hot (600 degrees F) dry rock
  • Fracture rock by injecting cold water
  • Drill more holes about 1500 feet away
  • Pump water down original hole and out secondary holes. Convert to steam and use flash (direct) or heat exchanger/binary systems to drive steam turbine and generate electricity.
  • Successful test January 2013.
slide27
Binary SystemUtilizes a secondary closed loop of low boiling point substance to drive the turbine (Probable EGS model—low water consumption.
u s geothermal neal hot springs harney county binary system
U.S. GeothermalNeal Hot Springs—Harney CountyBinary System
  • Utilizes hot water to boil secondary fluid in a heat exchanger.
  • 23 MW Energy (perhaps enough for 26,000 homes)
  • $136 million cost
benefits
Benefits
  • 50% - 70% more efficient than fossil fuel systems
  • 25% - 50% less operating cost
drawbacks
Drawbacks
  • Costs “Several Times” more than other heating/cooling systems
  • Not many installers or repair/adjustment companies yet
ocean thermal energy conversion otec
Ocean Thermal Energy Conversion (OTEC)
  • As Near as I can tell there are no operating systems utilizing the temperature differences in the ocean. In theory and in demos it works, but the costs are so high that nobody has yet invested in a commercial scale site.
water turbines like wind turbines but tiny in comparison
Water Turbines (like wind turbines but tiny in comparison)
  • Water is 784 times more dense than air = 784 times more energy per unit area of moving water.
  • Dependable—tide goes in and out on a regular basis. Rivers flow at a dependable rate
  • Widespread possibilities.
  • In reality, still in test mode—production costs still very speculative.
slide38
Marine Current TurbineWorld’s First Commercial Scale Tidal Turbine (Strangford Lough, N. Ireland)1.2 MW capability (1000 homes)
slide40
Christian Science Monitor articicle “Tidal turbines: New sparks of hope for green energy from beneath the waves”
slide41
Ocean Renewable Power CompanyThis thing sits on the bottom of a river or bay. It’s a demo and produces 150 kw of electricity as tide goes in and out.
slide42
Tidal Barrage SystemAdvantage is that this one can function as a “battery” saving impounded water to generate electricity later
above the surface
Above the Surface
  • Lots of Experimenting, no commercial examples yet—at least none that I know of, but here are some of the ideas.
pelamis wave energy converter or loch ness monster 750 kw per monster no commercial farms yet
Pelamis Wave Energy ConverterOR Loch Ness Monster!750 KW per monster. No commercial “farms” yet
enernet or cleanweb or soft grid
“Enernet” or “Cleanweb” or “Soft Grid”
  • Definition: Internet-enabled efficiency
    • A. Digital Lumens Company utilizes LED lights; motion sensors; ambient light sensors; data; internet technologies. Reduce energy consumption by 90% or more.
enernet or cleanweb or soft grid1
“Enernet” or “Cleanweb” or “Soft Grid”
  • Definition: Internet-enabled efficiency
    • A. Digital Lumens Company utilizes LED lights; motion sensors; ambient light sensors; data; internet technologies. Reduce energy consumption by 90% or more.
    • B. Opower Company provides digital consumption alerts via smart phones, iPad apps, smart thermostats to make consumers aware of their energy use but also their neighbor’s use (anonymously). 85 unilities, 27 countries, 18 million homes.
enernet or cleanweb or soft grid2
“Enernet” or “Cleanweb” or “Soft Grid”
  • Definition: Internet-enabled efficiency
    • A. Digital Lumens Company utilizes LED lights; motion sensors; ambient light sensors; data; internet technologies. Reduce energy consumption by 90% or more.
    • B. Opower Company provides digital consumption alerts via smart phones, iPad apps, smart thermostats to make consumers aware of their energy use but also their neighbor’s use (anonymously). 85 unilities, 27 countries, 18 million homes.
    • C. EnerNOC Company works with 14,000 customers in five states. When a utility nears capacity, contacts customers, who then reduce consumption for a fee. Can curtail 30-35%
enernet or cleanweb or soft grid3
“Enernet” or “Cleanweb” or “Soft Grid”
  • Definition: Internet-enabled efficiency
    • C. EnerNOC Company works with 14,000 customers in five states. When a utility nears capacity, contacts customers, who then reduce consumption for a fee. Can curtail 30-35%
    • D. Nest Labs Company sells thermostats that “learn” a house energy needs, and begins to set itself. “At its core it is a smart phone on your wall.” It is internet connected, so can be controlled remotely. It also allows devices in home to communicate with each other via internet—like CO2 detector “talking” with furnace.
google
Google!!!!!
  • And Google is buying ‘em all. It is a great data collection resource, then that data can be used for . . . . .
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