Chapter 12 Nonrenewable Energy Resources Overview Module

Chapter 12 Nonrenewable Energy Resources

Overview Module 34: Patterns of Energy Use Module 35: Fossil Fuel Resources Module 36: Nuclear Energy Resources

Module 34: Patterns of Energy Use 1. 2. 3. Do Now: Read the opening case study and answer the following questions: What are some of the risks associated with use of nonrenewable fossil fuels? Why are fossil fuels classified as a nonrenewable energy source? Describe TWO impacts on the environment.

Nonrenewable Energy Nonrenewable energy resources- fossil fuels (coal, oil, natural gas) and nuclear fuels.

Fossil Fuels

Energy Sources Modern society requires large quantities of energy that are generated from the earth’s natural resources. Primary Energy Resources: The fossil fuels(oil, gas, and coal), nuclear energy, falling water, geothermal, and solar energy. Secondary Energy Resources: Those sources which are derived from primary resources such as electricity, fuels from coal, (synthetic natural gas and synthetic gasoline), as well as alcohol fuels.

Thermodynamics The laws of thermodynamics tell us two things about converting heat energy from steam to work: 1) The conversion of heat to work cannot be 100 % efficient because a portion of the heat is wasted. 2) The efficiency of converting heat to work increases as the heat temperature increases.

Energy Units and Use Joule (J) (pronounced: JOOL): amount of energy exerted when a force of one newton (N) is applied over a displacement of one meter. Unit prefixes: Kilo (K) = 1, 000 or 10^3 i. e. , 1 Kilowatt (k. W) = 1, 000 watts = 10^3 W 1 KJ = 1, 000 joule = 10^3 J milli (m) = 1/1, 000 or 10^-3 mega (M) = 1, 000 or 10^6 Giga (G) = 1, 000, 000 or 10^9

Energy vs. Power Energy: ability to do work (vague sense) Work: amount of energy over a certain time. Common Energy Units: J, KJ, MJ, GJ, BTU, cal. , kcal, k. Wh… Common Power Units: W, KW, MW, GW… 1 W = 1 J/s

Do the Math 1. Express the following in scientific notation: 10, 000 2. 34, 567, 000 3. 0. 0053 4. 0. 06767

Do the Math Addition and Subtraction: (1. 23 x 10^2 ) + (0. 76 x 10^2) (4. 215 x 10^3) + (13. 3 x 10^2) (122. 5 x 10^-2) – (32. 3 x 10^-3)

Do the Math Multiplication and Division: (3. 4 x 10^6) x (2. 0 x 10^3) (6. 4 x 10^-3) / (2. 0 x 10^-4)

Energy Units and Use Btu (British thermal unit) - amount of energy required to raise the temperature of 1 lb of water by 1 ºF. cal (calorie) - the amount of energy required to raise the temperature of 1 g of water by 1 ºC. Commonly, kilocalorie (kcal) is used. 1 Btu = 252 cal = 0. 252 kcal 1 Btu = 1055 J (joule) = 1. 055 k. J 1 cal = 4. 184 J

Energy Units and Use Two other units that are often seen are the horsepower and the watt. These are not units of energy, but are units of power. 1 watt (W) = 3. 412 Btu / hour 1 horsepower (hp) = 746 W Watt-hour - Another unit of energy used only to describe electrical energy. Usually we use kilowatt -hour (k. W-h) since it is larger. quad (Q) - used for describing very large quantities of energy. 1 Q = 1015 Btu

Do the Math A runner burns 600 Calories in track practice. How many J did the runner burn? 1 Calorie = 1, 000 calories A lawnmower has 5 hp. How many watts would that equal?

Energy Use Commercial energy sources- those that are bought and sold, such as coal, oil and natural gas. Subsistence energy sources- those gathered by individuals for their own use such as wood, charcoal and animal waste.

Changes in U. S. Energy Use www. bio. miami. edu/beck/esc 101/Chapter 14&15. pp t

Worldwide Patterns of Energy Use Energy consumption in the United States from 1850 through 2012. Wood and then coal once dominated our energy supply. Today a mix of three fossil fuels accounts for most of our energy use. The recent increase in natural gas and decrease in oil and coal is quite evident.

Energy resources removed from the earth’s crust include: oil, natural gas, coal, and uranium www. bio. miami. edu/beck/esc 101/Chapter 14&15. ppt

Different energy forms are best suited for specific purposes The best form of energy to use depends on the particular purpose for which it is needed. It is possible to determine energy efficiency by calculating the energy return on energy investment (EROEI) EROI = Energy obtained from fuel ÷ Energy invested to obtain fuel The larger the value of EROI, the more efficient the fuel.

Process of Energy Use

Efficiency of different modes of transportation If you are traveling distance is 300 miles, how many MJ of energy you would use if you will be driving? 300 miles x 1. 6=480 kmx 3. 6 MJ/passenger-km =1728 MJ/passenger

Energy and Transportation

Electricity accounts for 40 percent of our energy use Electricity can be generated from many different sources Energy carrier Something that can move and deliver energy in a convenient, usable form to end users.

The Process of Electricity Generation All thermal power plants convert the potential energy of a fuel into electricity. Turbine A device with blades that can be turned by water, wind, steam, or exhaust gas from combustion that turns a generator in an electricity-producing plant. Electrical grid A network of interconnected transmission lines that joins power plants together and links them with end users of electricity.

The Process of Electricity Generation Steps for using coal to produce electricity: The burning fuel from coal transfers energy to water, which becomes steam. The kinetic energy contained within the steam is transferred to the blades of a turbine, a large device that resembles a fan. As the energy in the steam turns the turbine, the shaft in the center of the turbine turns the generator. This mechanical motion generates electricity.

Electricity Generation

Electricity Generation The burning fuel from coal transfers energy to water, which becomes steam. The kinetic energy contained within the steam is transferred to the blades of a turbine, a large device that resembles a fan. As the energy in the steam turns the turbine, the shaft in the center of the turbine turns the generator. This mechanical motion generates energy.

Energy Efficiency Most coal burning power plants are about 35% efficient.

Cogeneration Cogeneration- using a fuel to generate electricity and to produce heat. Example- If steam is used for industrial purposes or to heat buildings it is diverted to turn a turbine first. This improves the efficiency to as high as 90%.

M 34 AP Review Questions 1. Which energy source does not originate from the Sun? a. Coal b. Solar c. Oil d. Nuclear e. Natural gas

M 34 AP Review Questions 2. Traveling alone in a car uses 3. 6 MJ of energy per km. If 4 people go on a trip of 400 miles, what is the MJ used person? a. 200 MJ b. 320 MJ c. 580 MJ d. 860 MJ e. 1440 MJ

M 34 AP Review Questions 3. The major source of energy in the US is a. Natural gas b. Coal c. Oil d. Nuclear e. Renewable

M 34 AP Review Questions 4. Which is an example of a secondary energy source? a. Solar b. Coal c. Electricity d. Heat e. Nuclear

M 34 AP Review Questions 5. Cogeneration is a. The use of two or more energy sources to generate electricity b. The use of two separate turbines to generate electricity c. A method of electricity generation that includes renewable energy. d. The use of a fuel to generate heat and electricity e. A method of increasing a power plant’s capacity factor.

Journal/Math #9 Work on questions 1 and 6

Module 35 Fossil Fuel Resources

Coal Coal- a solid fuel formed primarily from the remains of trees, ferns, and other plant materials that were preserved 280 -360 million years ago. Four types of coal ranked from lesser to greater age, exposure to pressure, and energy content. These four types are: lignite, sub-bituminous, and anthracite. The largest coal reserves are in the United States, Russia, China, and India.

Coal

Ranks of Coal Lignite: A brownish-black coal of low quality (i. e. , low heat content per unit) with high inherent moisture and volatile matter. Energy content is lower 4000 BTU/lb. Subbituminous: Black lignite, is dull black and generally contains 20 to 30 percent moisture Energy content is 8, 300 BTU/lb. Bituminous: most common coal is dense and black (often with well-defined bands of bright and dull material). Its moisture content usually is less than 20 percent. Energy content about 10, 500 Btu / lb. Anthracite : A hard, black lustrous coal, often referred to as hard coal, containing a high percentage of fixed carbon and a low percentage of volatile matter. Energy content of about 14, 000 Btu/lb. www. uvawise. edu/philosophy/Hist%20295/%20 Powerpoint%5 CCoal. ppt

Main Coal Deposits Bituminous Subbituminous Lignite Anthracite

Advantages and Disadvantages of Coal Advantages Disadvantages Energy-dense Contains impurities Plentiful (300 years of use remaining) Release impurities into air when burned Easy to exploit by surface mining Trace metals like mercury, lead, and arsenic are found in coal Technological demands are small Combustion leads to increased levels of sulfur dioxide and other air pollutants into the atmosphere. Economic costs are low Ash is left behind Easy to handle and transport Carbon is released into the atmosphere which contributes to climate change Needs little refining Major threat to health

garnero 101. asu. edu/glg 101/Lectures/L 37. ppt

Acid Mine Drainage The impact of mine drainage on a lake after receiving effluent from an abandoned tailings impoundment for over 50 years

Relatively fresh tailings in an impoundment. http: //www. earth. uwaterloo. ca/services/whaton/s 06_amd. html The same tailings impoundment after 7 years of sulfide oxidation. The white spots in Figures A and B are gulls.

Petroleum Petroleum- a mixture of hydrocarbons, water, and sulfur that occurs in underground deposits. Oil and gasoline make this ideal for mobile combustion, such as vehicles. Formed from the remains of ocean-dwelling phytoplankton that died 50 -150 million years ago. Countries with the most petroleum are Saudi Arabia, Russia, the United States, Iran, China, Canada, and Mexico.

Petroleum

Oil in U. S. • 2. 3% of world reserves • uses nearly 30% of world reserves; • 65% for transportation; • increasing dependence on imports. www. bio. miami. edu/beck/esc 101/Chapter 14&15. ppt

Advantages and Disadvantages of Petroleum Advantages Disadvantages Convenient to transport and use Releases carbon dioxide into atmosphere Relatively energy-dense Possibility of leaks when extracted and transported Cleaner-burning than coal Some water pollution Low Cost with subsidies Releases sulfur, mercury, lead, and arsenic into the atmosphere when burned Ample supply for about 50 years When price is low discourages alternate choices encourages waste

Natural Gas Natural gas- exists as a component of petroleum in the ground as well as in gaseous deposits separate from petroleum. Contains 80 to 95 percent methane and 5 to 20 percent ethane, propane, and butane.

Sources of Natural Gas • Russia & Kazakhstan - almost 40% of world's supply. • Iran (15%), Qatar (5%), Saudi Arabia (4%), Algeria (4%), United States (3%), Nigeria (3%), Venezuela (3%); • 90– 95% of natural gas in U. S. domestic (~411, 000 km = 255, 000 miles of pipeline). www. bio. miami. edu/beck/esc 101/Chapter 14&15. ppt

billion cubic metres

Advantages and Disadvantages Natural Gas Advantages Disadvantages Contains fewer impurities and therefore emits almost no sulfur dioxide or particulates When unburned, methane escapes into the atmosphere Emits only 60% as much carbon dioxide as coal Exploration of natural gas has the potential of contaminating groundwater Ample supplies up to 150 years Low cost with huge subsidies Shipped across oceans as highly flammable LNG

Other Fossil Fuels Oil sands- slow-flowing, viscous deposits of bitumen mixed with sand, water, and clay. Bitumen (tar or pitch)- a degraded type of petroleum that forms when a petroleum migrates close to the surface, where bacteria metabolize some of the light hydrocarbons and others evaporate.

The Hubbert Curve Hubbert curve- a graph that shows the point at which world oil production would reach a maximum and the point at which we would run out of oil.

The Future of Fossil Fuel Use If current global use continues, we will run out of conventional oil in less than 40 years. Coal supplies will last for at least 200 years, and probably much longer.

• Burning any fossil fuel releases carbon dioxide into the atmosphere and thus promotes global warming. • Comparison of CO 2 emitted by fossil fuels and nuclear power. www. bio. miami. edu/beck/esc 101/Chapter 14&15. ppt

M 35 AP Review Questions 1. a. b. c. d. e. Which type of coal has the highest energy density? Lignite Peat Bituminous Anthracite Subbitumious

M 35 AP Review Questions 2. What makes petroleum convenient to use as a fuel for transportation? I. High energy density II. Clean burning III. Its liquid state a. I only b. I and III only c. II and III only d. I, II and III e. III only

M 35 AP Review Questions 3. Natural gas is primarily a. Ethane b. Propane c. Butane d. Methane e. Kerosene

M 35 AP Review Questions 4. Bitumen is a. A form of liquid coal b. A degraded type of petroleum c. A by-product of natural gas extraction d. A fast-forming fossil fuel e. A petroleum product used for plastic production

M 35 AP Review Questions 5. The Hubbert curve predicts that a. Peak oil will occur once half of the supply is used up. b. Finding additional reserves could greatly increase the time to peak oil. c. Natural gas will be cheaper than oil by the early twenty-first century. d. The cost of oil is independent of the world’s oil supply. e. Coal will run out faster than oil.

Module 36: Nuclear Energy Resources

Nuclear Energy Fission- a nuclear reaction in which a neutron strikes a relatively large atomic nucleus, which then splits into two or more parts.

Nuclear Reactors

Nuclear Reactors Fuel rods- the cylindrical tubes that house the nuclear fuel used in a nuclear power plant. Nuclear power plants work by using heat from nuclear fission to heat water. This water produces the steam to turn the turbine, which turns a generator. Control rods- cylindrical devices that can be inserted between the fuel rods to absorb excess neutrons, thus slowing or stopping the fission reaction.

Advantages and Disadvantages of Nuclear Energy Advantages Disadvantages No air pollution is produced Possibility of accidents Countries can limit their need for imported oil Disposal of the radioactive waste Emits 1/6 as much pollution as coal High cost even with high subsidies Low environmental impact if no accidents Spreads knowledge for nuclear weapons Low net energy yield

Radioactive Waste Radioactive waste- once the nuclear fuel can not produce enough heat to be used in a power plant but it continues to emit radioactivity. This waste must be stored in special, highly secure locations because of the danger to living organisms.

Radioactive Waste High-level radioactive waste- the form used in fuel rods. Low-level radioactive waste- the protective clothing, tools, rags, and other items used in routine plant maintenance.

Chernobyl • April 26, 1986, reactor explosion (Ukraine) flung radioactive debris into atmosphere • Health ministry reported 3, 576 deaths • Green Peace estimates 32, 000 deaths; • About 400, 000 people were forced to leave their homes • ~160, 000 sq km (62, 00 sq mi) contaminated • > Half million people exposed to dangerous levels of radioactivity • Cost of incident > $358 billion www. bio. miami. edu/beck/esc 101/Chapter 14&15. ppt

Three Mile Island • March 29, 1979, a reactor near Harrisburg, PA lost coolant water because of mechanical and human errors and suffered a partial meltdown • 50, 000 people evacuated & another 50, 000 fled area • Unknown amounts of radioactive materials released • Partial cleanup & damages cost $1. 2 billion • Released radiation increased cancer rates. www. bio. miami. edu/beck/esc 101/Chapter 14&15. ppt

Fusion Nuclear fusion- the reaction that powers the Sun and other stars. This occurs when lighter nuclei are forced together to produce heavier nuclei and heat is released. Fusion is a promising, unlimited source of energy in the future, but so far scientists have had difficulty cotaining the heat that is produced.

M 36 AP Review Questions 1. a. b. c. d. e. One g of U-235 produces approximately how much more energy than 1 g of coal? 3, 000 times 19, 000 times 80, 000 times 400, 000 times 2, 000 times

M 36 AP Review Questions 2. Control roads slow nuclear reactions by a. Reducing the amount of fuel available b. Absorbing the heat produced. c. Increasing the rate heat transfers to the water d. Absorbing excess neutrons e. Adding additional barium to the reaction.

M 36 AP Review Questions 3. The process of fusion a. Splits atoms b. Requires extremely high temperatures. c. Uses plutonium instead of uranium d. Requires several radioactive elements e. Does not produce radioactive waste

M 36 AP Review Questions 4. Increased interest in nuclear power is due to a. Low energy costs b. Lack of significant accidents c. Low carbon dioxide emissions d. New solutions for waste disposal e. Decreased energy independence

M 36 AP Review Questions 5. For a sample of Ti-44 with a half-life of 63 years, how long until 1/16 of the original amount is left? a. 63 years b. 126 years c. 189 years d. 252 years e. 315 years