SUSTAINABLE ENERGY!!!! ?

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SUSTAINABLE ENERGY!!!! ?

• Pass back the new objective sheet and read the
  board!
• If you have your permission slip and 5, please
  put it out on your desk for pick up!

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Asking the big energy questions

• How do we live sustainably on our planet?
• What tradeoffs must be considered if our society
  gets serious about making the transition from a
  consumptive society to a sustainable society?

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A proposition

• We NEED energy. The FORM of energy and the FUELS
  we use to create convenient energy are a matter
  of choice.
• (Electricity for buildings/Vehicles)

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• So what will take the place of fossil fuels?

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Every power system has pros and cons
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Solar power must be stored for nights and cloudy
days
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Are we asking the wrong question?

• Should we be looking for a one-to-one
  substitution solution?

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Distributed power vs centralized power

• Creating a paradigm shift

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Current electricity grid

• One major regional power plant, usually coal,
  natural gas or nuclear supplies areas needs
• Same plan throughout US

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Our electric grid power plants connected to
consumers
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Our electric grid power plants connected to
consumers
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A new energy concept

• Distributed Power dispersed, small-scale power
  systems customized to geographic region combine
  to meet a regions needs

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The mix that works for Houston would be different
than the mix for Detroit.
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A Smarter grid (how is it smarter? Compare to
centralized)
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Solar Leasing Program announced 2/10/15! (San
Antonio)
Installation companies own and install solar
panels on homes rent the roof space from
homeowners
grid
Get electricity surplus sold to CPS rent check
from installation companies
CPS receives surplus kW to distribute on grid to
other customers
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CPS avoiding another centralized power plant!

• CPS Energy is our utility, its owned by us, the
  people of San Antonio. And the idea of our
  utility putting solar on our peoples rooftops,
  instead of building another centralized power
  plant its a very exciting thing, and Solar San
  Antonio (SSA) is very supportive, stated SSA
  Interim Executive Director Anita Ledbetter in a
  news release. Ledbetter is also executive
  director of Build Green San Antonio, the
  nonprofit sustainable building resource and
  third-party green building certification program.

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Smart grid and smart meters

• Information allows for smart decision making
• Expected connectivity with major appliances

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Decentralized power

• Advantages
• Greater reliance on renewables
• Decreased climate change
• Protection from centralized power outages
  (storms, malfunction, terrorism)
• New jobs/new industries
• Promote more community

• Disadvantages
• Change is difficult
• Need for new infrastructure which may be costly
• Requires more cooperation
• Some jobs will be lost
• Shift in local economies

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Process it!

• Describe centralized power
• Describe decentralized power
• Explain how geography would impact decentralized
  power

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ENERGY EFFICIENCY!!!
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Energy Efficiency

• The easiest alternative energy source is the
  energy we dont use
• Savings drives innovation
• Starting with increased efficiency makes meeting
  demand with sustainables much easier.

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Name the city . . . .

• Switched 2,450 incandescent traffic signals to
  LED to save 3.6 million/yr
• Has the third biggest fleet of hybrid vehicles in
  the nation
• Has reduced greenhouse gas emissions by 26 since
  2007
• Ranks first in the nation for purchasing green
  electricity

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Hometown H-town!
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250 Charging stations in Houston

• 2009 Reliant Energy sponsored the conversion of
  ten City of Houston Prius vehicles to
  plug-in-hybrid electric vehicles (PHEV).
• 2011 the City received its first two all
  electric passenger vehicles. The all electric
  Nissan Leafs have zero tailpipe emissions, and it
  is estimated that each vehicle will save 7-8 K
  in fuel and maintenance costs over a three year
  period. In 2011 the City will continue to grow
  the electric vehicle fleet by adding an
  additional 23 electric vehicles.

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Electric vehicles Chevy Volt, Nissan leaf, BMW
i3
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Tesla 3.7 sec to 60mph 245 mi/charge 0
tailpipe emissions
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3 most inefficient devices

• Incandescent lights
• Internal combustion engine
• Nuclear electrical generation

• 5 efficient heat bulb
• Less than 5 of fuel moves the driver! Energy
  lost in propulsion system, idling, running AC,
  conversion to heat, moving vehicle. Vehicle
  weight is responsible for more than 2/3 of energy
  needed to move it.
• Consider entire life cycle of production
  mining, refining, transportation of fuel, waste
  heat of steam

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3 most inefficient devices solutions!

• Incandescent lights
• Internal combustion engine
• Nuclear electrical generation

• Transition to LEDs
• CAFÉ standard currently 27mpg New law 54.5
  mpg by 2025 (changes start in 2017 models)
• Consider entire life cycle of production

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Efficiency of a device

• Energy in energy out as a percentage

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Net energy of a fuel or energy source

• Total power provided by source total energy
  required to produce power
• Extraction? transportation? processing ?
  transportation to power plant ? electrical
  generation ? transmission ? end use
• Compare net energy of our options (trade off!)

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Whats the difference?

• Energy efficiency
• Net energy

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25 of energy is used in buildings, so. . . . .
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Field trip!

• Green Resource Building Center
• Last Organic Outpost
• Kendall Library

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Home Energy Audit -

• Create a plan to reduce your electrical use at
  home.
• What if you changed all your light bulbs to LEDs?
• How much power do your computers use?
• How might turning off your game system when
  youre done change your electric bill?

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Home Energy Audit

• AC vs. furnace/ hot water

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Kahoot?