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Energy and SustainabilityPowerPoint Presentation

Energy and Sustainability

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Energy and Sustainability

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How much energy do you need?

How much energy do you use?

- How much energy do you need?
- Energy from food
- = 2,000 Calories / day
- = 8,000 BTUs / day

- Energy forall of the other things you do
- = (Take a guess) _____________ BTUs ?

Total annual energy consumption in the United States (2011)

97.3 quadrillion BTUs

~ 1017 BTUs

~ 1020 Joules

(1 BTU = 1055 Joules)

Total U.S. energy consumption

= 97 x 1015 BTUs / year

Then yourenergy consumption / day is

97 x 1015 BTUs / year

(316,000,000 people) (365 days / year)

= 840,000BTUs / person / day

( + 8,000 BTUs from food )

So, if you are a typical U.S. resident, you will use about 848,000 BTUs of energy today

Food:

8,000 BTUs

For all other things:

840,000 BTUs

How can this be?

Sector

Electric Power40%

Transportation 28%

Industry21%

Res & Commercial 11%

Total (97 quads)100%

Your energy use = Direct use + Indirect use

Source (quads)

Hydroelectric 3.2

Wood2.0

Biofuels1.9

Wind1.2

Waste0.5

Geothermal0.2

Solar / PV 0.2

Total (quads) 9.1

Renewables are ~ 9% of U.S. Total Energy Consumed

Oil35%

Natural Gas24%

Coal28%

Nuclear6%

Hydro6%

Renewable2%

Total510 quads

= 200,000 BTUs / person / day

BTUs / person / day

United States840,000

Australia718,000

France498,000

Japan440,000

Mexico157,000

China130,000

Brazil84,000

India36,000

Parts of Africa7,000

Estimated world reserves of fossil fuels

(in quadrillion BTUs):

Years left

Quadsat current

consumedconsumption

Reserves per year rate

Oil6,37017836

Natural gas6,39012153

Coal20,250143142

Fuels:

Oil35%

Natural Gas24%87%

Coal28%

Nuclear6%

Hydro6%

Renewable2%

510 Quadrillion BTUs / year

- Conservation
- Efficiency
- Geothermal
- Solar
- Passive
- Photovoltaic

- Fuel cells
- Tidal
- Wind
- Waves
- Hydroelectric
- Nuclear
- Biomass