Man and energy
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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 in sun light

Energy in sun light


Quality of energy

Quality of 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


Important nonrenewable energy resources

Important nonrenewable energy resources


Shifts in the use of commecial energy resources in the u s

Shifts in the use of commecial energy resources in the U.S.


World commercial energy use 1999

World commercial energy use 1999


Thai commercial energy use 2000

Thai commercial energy use 2000


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


Refining crude oil

Refining crude oil


Major trade routes for the world s oil

Major trade routes for the world’s oil


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


Natural gas deposite

Natural gas deposite


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

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


Types of coal

Types of coal


Coal formation 1

Coal formation 1


Coal formation 2

Coal formation 2


Coal formation 3

Coal formation 3


Strip mining of coal

Strip mining of coal


Open pit mine

Open-pit mine


Advantages of using coal as an energy resource

Advantages of using coal as an energy 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

  • 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


Fission

Fission


Fusion

Fusion


Nuclear reactor

Nuclear reactor


Control rods

Control rods


Advantages of using nuclear power to produce electricity

Advantages of using nuclear power to produce electricity

  • 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

  • Low risk of accidents because of multiple safety systems (except in 35 poorly designed and run reactors in former Soviet Union and Eastern Europe)


Disadvantages of using nuclear power to produce electricity

Disadvantages of using nuclear power to produce electricity

  • High cost (even with large subsidies)

  • Low net energy yield

  • High environmental impact (with major accidents)

  • Catastrophic accidents can happen (Chernobyl)


Man and energy

  • No acceptable solution for long-term storage of radioactive wastes and decommissioning worn-out plants

  • Spreads knowledge for building nuclear weapons


Three miles island

Three Miles Island

March 28, 1979


Chernobyl

Chernobyl

April 26, 1986


Coal nuclear

Ample supply

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


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