DOC PREVIEW
UCM BIOL 1005 - Renewable Energy Sources

This preview shows page 1-2 out of 5 pages.

Save
View full document
View full document
Premium Document
Do you want full access? Go Premium and unlock all 5 pages.
Access to all documents
Download any document
Ad free experience
View full document
Premium Document
Do you want full access? Go Premium and unlock all 5 pages.
Access to all documents
Download any document
Ad free experience
Premium Document
Do you want full access? Go Premium and unlock all 5 pages.
Access to all documents
Download any document
Ad free experience

Unformatted text preview:

BIOL 1005 1st Edition Lecture 18 Outline of Last Lecture I. Energy SourcesII. Nonrenewable Energy SourcesIII. Nonrenewable EnergyIV. Formation of Fossil FuelsV. Coal TypesVI. OilVII. Natural GasVIII. Extracting CoalIX. Coal UseX. Mining CoalXI. ProblemsXII. Extracting OilXIII. Crude Oil Must Be “Refined”XIV. ProblemsXV. Extracting Natural GasXVI. Natural GasXVII. ProblemsXVIII. CoalXIX. Oil Natural GasOutline of Current Lecture I. Renewable Energy SourcesII. Water PowerIII. ProblemsIV. Tidal PowerV. ProblemsVI. Geothermal VII. ProblemsVIII. Wind PowerIX. ProblemsX. Solar Energy XI. Passive SystemsXII. Active SystemsXIII. Solar-generated ElectricityXIV. ProblemsXV. Fuel WoodThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.XVI. ProblemsXVII. BiomassXVIII. ProblemsXIX. Solid Waste Mass BurnXX. ProblemsXXI. Energy ConservationCurrent LectureI. Renewable Energy Sources- biomass - solid wastes (e.g. paper, plastic)- solar - geothermal - tidal - Wind- water II. Water Power- Long history of use (grain mills, saw mills, textile machines). - Hydroelectric power plants built on mountain streams, or included in dams. - Now produces about 2.4% of world’s energy.III. Problems- loss of farmland - loss of stream/river habitat- species loss- undesirable species appear - relocation of people IV. Tidal Power- Trapping the energy in moving water.- Only one large scale tidal generating station in the world (France)-240 megawatt capacity - England is considering a 7,200 megawatt plant (similar cost to a coal fired plant of same size). V. Problems- hydraulic disruption in estuary - pollutants concentrate VI. Geothermal- Earth’s core reaches temperatures of 4400o C - volcanoes - heats ground water (springs and geysers) - can turn water into steam- Geothermal energy tapped by drilling well, and using steam to turn turbines. - U.S. has world’s largest geothermal plant (California) - enough energy to supply San Francisco. - Generates less air pollution.- Typically less expensive than fossil fuel power plants.- Very limited- Has applicationsVII. Problems- good sites often require habitat destruction - hydrogen sulfide - minerals are corrosive to pipes - minerals may be toxic to fish VIII. Wind Power- A form of solar energy - Long history of use (grain mills, pump water, move ships). - Recently, used to generate electricity. (stationary and portable units) - California, Netherlands and India plan for 5% to 8% energy production from wind.IX. Problems- need steady, dependable source of wind. - aesthetic impacts. X. Solar Energy- Sun’s energy is steady, and far exceeds world’s demand for energy (***600 timesgreater than that produced by all other forms).XI. Passive Systems- Light energy converted to heat energy.- maintenance free- practical only in new building designXII. Active Systems- Passively heat liquid, and actively (pump) to transfer heat. - pumps require maintenance- must store heat for times when sun energy is low - can recoup construction costs in 3 to 10 years- takes energy to make it work- has moving partsXIII. Solar-generated Electricity- Bell Labs invented photovoltaic cells in 1954. - Many small or remote location uses- Can use solar energy to heat oil and then water to drive steam generators.- Price is dropping for photovoltaic cells and for steam generators.XIV. Problems- Currently provides less than 1% of world’s energy. - Intermittent supply of solar energy. - Usually must supplement solar energy with some other form. - Still relatively expensive technology. XV. Fuel Wood- Provides 10% of home heating energy in U.S. Provides 3% of total energy in Canada. - In many developing nations, it provides up to 75% of total energy.- Definite limitXVI. Problems- transportation - fuel is used at faster rate than it can be grown. - desertification - air pollution (fly ash, carbon monoxide) - produces known carcinogens XVII. Biomass- Derives energy from chemical energy stored in biomass.- Methane digesters. - Alcohol production from fermentation. - Wood burning electrical generators. - Anything organic that can become energyXVIII. Problems- most often used in countries with food shortages - nutrients removed from soils - more energy input than output XIX. Solid Waste Mass Burn- 1.8 kilograms solid waste discarded each day in New York per person. 80% of thiswaste is combustible.- Reduces volume of waste and can generate electricity.- U.S. does little “trash power”. - Increasing supply- Burning solid waste to generate electricityXX. Problems- waste must be sorted - waste stream must be steady - air pollution - toxic compounds released XXI. Energy Conservation- Potential for 50% reduction in energy use.- stoves versus open fires- fluorescent lights (lights and air conditioning account for 25% of U.S. electricity use). - low emissive glass- automatic light shut off - Economics - short term versus long


View Full Document
Download Renewable Energy Sources
Our administrator received your request to download this document. We will send you the file to your email shortly.
Loading Unlocking...
Login

Join to view Renewable Energy Sources and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Renewable Energy Sources 2 2 and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?