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Man and Energy. Pongthep Suwanwaree, Ph.D. School of Biology Institute of Science Suranaree University of Technology 18 January 2005. What is the meaning of Energy?. Potential Energy Kinetic Energy. Energy in sun light. Quality of energy. Energy evolution 1. Late 1700s.

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Man and energy
Man and Energy

  • Pongthep Suwanwaree, Ph.D.

  • School of Biology

  • Institute of Science

  • Suranaree University of Technology

  • 18 January 2005


What is the meaning of energy
What is the meaning of Energy?

  • Potential Energy

  • Kinetic Energy




Energy evolution 1
Energy evolution 1

Late 1700s


Energy evolution 2
Energy evolution 2

1960s

Late 1800s

1940s

Industrial Revolution


Types of energy
Types of Energy

  • Nonrenewable

  • Renewable






1 crude oil petroleum
1. Crude oil (Petroleum)

Proven world oil reserves (billions of barrels) in 1997


Oil drilling 1
Oil drilling 1

Cook Inlet of

Southern Alaska


Oil drilling 2
Oil drilling 2

Sahara Desert

of Algeria




Advantages of using conventional oil as an energy resource
Advantages of using conventional oil as an energy resource

  • Ample supply for 42-93 years

  • Low cost (with huge subsidies)

  • High net energy yield

  • Easily transported within and between countries

  • Low land use


Disadvantages of using conventional oil as an energy resource
Disadvantages of using conventional oil as an energy resource

  • Need to find substitute within 50 years

  • Artificially low price encourages waste and discourages search for alternatives

  • Air pollution when burned

  • Releases CO2 when burned

  • Moderate water pollution


Man and energy

2. Natural gas resource



Advantages of using conventional natural gas as an energy resourse
Advantages of using conventional natural gas as an energy resourse

  • Ample supplies (125 years)

  • High net energy yield

  • Low cost (with huge subsidies)

  • Less air pollution than other fossil fuels

  • Lower CO2 emissions than other fossil fuels

  • Moderate environmental impact


Advantages of using conventional natural gas as an energy resource
Advantages of using conventional natural gas as an energy resource

  • Easily transported by pipeline

  • Low land use

  • Good fuel for fuel cells and gas turbines


Disadvantages of using conventional natural gas as an energy resource
Disadvantages of using conventional natural gas as an energy resource

  • Releases CO2 when burned

  • Methane (a greenhouse gas) can leak from pipelines

  • Shipped across ocean as highly explosive LNG

  • Sometimes burned off and wasted at wells because of low price


3 coal
3. Coal resource

World coal reserves (billions of tons) in 1997 (antracite+bituminous)


Types of coal
Types of coal resource






Open pit mine
Open-pit mine resource


Advantages of using coal as an energy resource
Advantages of using coal as an energy resource resource

  • Ample supply for 225-900 years

  • Low cost (with huge subsidies)

  • High net energy yield


Disadvantages of using coal as an energy resource
Disadvantages of using coal as an energy resource resource

  • Very high environmental impact

  • Severe land disturbance, air pollution and water pollution

  • High land use (including mining)

  • Severe threat to human health

  • High CO2 emission when burned

  • Releases radioactive particles and mercury into air


4 nuclear power
4.Nuclear Power resource


Fission
Fission resource


Fusion
Fusion resource


Nuclear reactor
Nuclear reactor resource


Control rods
Control rods resource


Advantages of using nuclear power to produce electricity
Advantages of using nuclear power to produce electricity resource

  • Large fuel supply

  • Low environmental impact (without accidents)

  • Emits 1/6 as much CO2 as coal

  • Moderate land disruption and water pollution (without accidents)

  • Moderate land use


Man and energy


Disadvantages of using nuclear power to produce electricity
Disadvantages of using nuclear power to produce electricity (except in 35 poorly designed and run reactors in former Soviet Union and Eastern Europe)

  • High cost (even with large subsidies)

  • Low net energy yield

  • High environmental impact (with major accidents)

  • Catastrophic accidents can happen (Chernobyl)


Man and energy


Three miles island
Three Miles Island wastes and decommissioning worn-out plants

March 28, 1979


Chernobyl
Chernobyl wastes and decommissioning worn-out plants

April 26, 1986


Coal nuclear

Ample supply wastes and decommissioning worn-out plants

High net energy yield

Very high air pollution

High CO2 emissions

65,000 to 200,000 deaths per year in U.S.

High land disruption from surface mining

High land use

Low cost

Ample supply of uranium

Low net energy yield

Low air pollution

Low CO2 emissions

About 6,000 deaths per year in U.S.

Much lower land disruption

High cost

Coal Nuclear