Why do we careWhy do we careabout energy?about energy?

High Energy SocietyHigh Energy Society

I am very energy conscious.I am very energy conscious.

11 22 33 44 55 66 77 88 99 1010 1111 1212 1313 1414 1515 1616 1717 1818 1919 2020

2121 2222 2323 2424 2525 2626 2727 2828 2929 3030 3131 3232 3333 3434 3535 3636 3737 3838 3939 4040

What is EnergyWhat is Energy We will look at the precise physics We will look at the precise physics

definition in a bit, but essentially, it is definition in a bit, but essentially, it is the ability to make something move.the ability to make something move.

The rate of using energy is called The rate of using energy is called POWER. Something that is powerful POWER. Something that is powerful uses a lot of energy quickly.uses a lot of energy quickly.

What do we care about energy?What do we care about energy? The bottom line is that using energy is The bottom line is that using energy is

strongly correlated to standard of living strongly correlated to standard of living (as measured by GDP per capita).(as measured by GDP per capita).

For most of history, we could rely on our For most of history, we could rely on our own bodies (about 100 W) or animals to do own bodies (about 100 W) or animals to do work.work.

Today in the US, we consume energy Today in the US, we consume energy at a rate of 11 kW per person.at a rate of 11 kW per person.

The vehicle I most like to drive or want to The vehicle I most like to drive or want to drive on a regular basis is…drive on a regular basis is…

2007 Report: Dust to Dust: The Energy Cost of New VehiclesFrom Concept to Disposalhttp://cnwmr.com/nss-folder/automotiveenergy/DUST%20PDF%20VERSION.pdf

World PopulationWorld Population

Jan 20, 2012World:6,989,078,405US:312,882,942

Jan 20, 19925,379,985,155

World PopulationWorld Population

Earth at Night – Energy UseEarth at Night – Energy Use

Energy use is directly tied to GDPEnergy use is directly tied to GDP

The GDP of a country is defined as the market value of all final goods and services produced within a country in a year.It is also considered the sum of value added at every stage of production of all final goods and services produced within a country in a given period of time.

GDP = consumption + investment +(government spending) + (exports − imports)

GDP per capita (US $)

GDP versus Energy UsageGDP versus Energy Usage

China is the World’s Biggest China is the World’s Biggest Consumer of EnergyConsumer of Energy

US Per Capita Energy UseUS Per Capita Energy Use

We are doing better onWe are doing better ona GDP per kWh basis.a GDP per kWh basis. Energy Intensity is

a measure of the energy efficiency of a nation's economy. It is calculated as units of energy per unit of GDP. * High energy intensities indicate a high price or cost of converting energy into GDP. * Low energy intensity indicates a lower price or cost of converting energy into GDP.

How Large is a Quadrillion BTU?

It's about equal to the amount of energy in 45 million tons of coal, or 1 trillion cubic feet of

natural gas, or 170 million barrels of crude oil.

In 2010, total world energy consumption was about 1 quad every 25 hours.

In terms of electricity, 1 quad is equal to 293 gigawatt-hours. 

2007

2009

Hydroelectric 2.84Geothermal 0.39Solar 0.12Wind 0.74Biomass 4.11