Copyright © by Holt, Rinehart and Winston. All rights reserved. Chapter 18 Finish Monday, Test Tues/Wed

Copyright © by Holt, Rinehart and Winston. All rights reserved. Passive Solar Heating Section 1 Renewable Energy Today Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Active Solar Heating Section 1 Renewable Energy Today Chapter 18

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Stirling Solar System 25 Kilowatt generator $250,000 world’s most efficient uses hydrogen to run a small turbine

Copyright © by Holt, Rinehart and Winston. All rights reserved. Photovoltaic Cells Section 1 Renewable Energy Today Sunlight falls on a semiconductor, causing it to release electrons. The electrons flow through a circuit that is complete when another semiconductor in the solar cell absorbs electrons and passes them on to the first semiconductor. Chapter 18

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Section 1 Renewable Energy Today Wind Farms The cost of wind power has been steadily falling as wind turbines have become more efficient. Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Biomass—Power from Living Things Section 1 Renewable Energy Today Chapter 18

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Bio-fuels Methane (manure, land fills, etc) Biodiesel Alcohol from corn grain Alcohol from sugar cane Alcohol from cellulose (corn stover or switchgrass) “Cellulosic ethanol”

Copyright © by Holt, Rinehart and Winston. All rights reserved. Hydroelectricity—Power from Moving Water Section 1 Renewable Energy Today Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Hydropower Advances In-stream low pressure micro-hydropower.

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Geothermal Energy—Power from the Earth Section 1 Renewable Energy Today Chapter 18

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Geothermal Heat Pumps: Energy for Homes Section 1 Renewable Energy Today Chapter 18

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Tidal Power Section 2 Alternative Energy and Conservation Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Ocean Thermal Energy Conservation Section 2 Alternative Energy and Conservation Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Fuel Cells Section 2 Alternative Energy and Conservation Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Fuel Cells can run on natural gas Or any other hydrogen rich fuel, including gasoline. Bloom Box delivers electricity (60 Minutes) A power plant converts chemical energy to thermal energy to mechanical energy to electrical energy. Then loses energy to scrubbers and transmission. A fuel cell leaves out the middle two steps, no pollution and can be set up in your back yard.

Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 2 Alternative Energy and Conservation Energy Efficiency Most of our devices are fairly inefficient. More than 40 percent of all commercial energy used in the United States is wasted. Increasing efficiency may involve sacrifices or investments in new technology. Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Section 2 Alternative Energy and Conservation Cogeneration production of two useful forms of energy from the same fuel source. For example, the waste heat from an industrial furnace can power a steam turbine that produces electricity. Small cogeneration systems have been used for years to supply heat and electricity to multiple buildings at specific sites. Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Hybrid Cars Section 2 Alternative Energy and Conservation Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Conservation Around the Home Section 2 Alternative Energy and Conservation Chapter 18

Copyright © by Holt, Rinehart and Winston. All rights reserved. Name______________hr___ 1. Concept Review20 2. Concept Map20 3. Video – Modern Marvels R.E Notes15 5. Video – Nova, Saved by the Sun10 6. Energy Problems20 TOTAL 100 Chapter 18 Notebook

Copyright © by Holt, Rinehart and Winston. All rights reserved. Name______________hr___ 1. Concept Review20 2. Concept Map20 3. Video – Modern Marvels R.E Notes15 5. Video – Nova, Saved by the Sun10 6. Energy Problems20 TOTAL 100 Chapter 18 Notebook

Copyright © by Holt, Rinehart and Winston. All rights reserved. Name______________hr___ 1. Concept Review20 2. Concept Map20 3. Video – Modern Marvels R.E Notes15 5. Video – Nova, Saved by the Sun10 6. Energy Problems20 TOTAL 100 Chapter 18 Notebook

Copyright © by Holt, Rinehart and Winston. All rights reserved. Name______________hr___ 1. Concept Review20 2. Concept Map20 3. Video – Modern Marvels R.E Notes15 5. Video – Nova, Saved by the Sun10 6. Energy Problems20 TOTAL 100 Chapter 18 Notebook

Copyright © by Holt, Rinehart and Winston. All rights reserved. Spring Science Nights March 31 st – Westwood View April 14 th – Fiske (KCK) April 18 th – Highlands