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Phys 150 Lecture 20

Please sit together in pairs: Mike A. and Efrain Barney and Da Thomas and Heran Glenn and Joe Serruto Ann and Yiran Johnny and Steve T. Korey and Joey B. Will and Andrea Michael W. and Stephen H. Zach and Qihan Casey and Nicole Audrey and Ed Lisette and Zhenmin Erica and Taehoon.

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Phys 150 Lecture 20

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  1. Please sit together in pairs: Mike A. and Efrain Barney and Da Thomas and Heran Glenn and Joe Serruto Ann and Yiran Johnny and Steve T. Korey and Joey B. Will and Andrea Michael W. and Stephen H. Zach and Qihan Casey and Nicole Audrey and Ed Lisette and Zhenmin Erica and Taehoon • Mikhail and Shenheng • Valerie and Matt R. • Kevin and Grant • Ally and Evan • Matt M. and Rebecca • Morgan and Katherine • Laura and Joe Sebek • Lauren and Quanbiao • Mikey O. and Charlie • Hannah and Lu • Jim and Ashkan • Nick and Naichen • Ben and Dale • Nik and Disha Phys 150 Lecture 20 Phys 150 Lecture 24 1

  2. Announcements • Exam 2 is Thursday, Nov. 29, in class. Covers Chapters 6-10 and Chapters 6, 25, 20 from MacKay (see the Phys 150 web page) • Practice Exam on the Phys 150 web page • No homework due on Monday, Dec. 3 • Quiz on Chapter 11 on Tuesday, Dec. 4 Phys 150 Lecture 24

  3. i>clicker question This is an example of solar thermoelectric concentrating solar power solar photovoltaic solar thermal Phys 150 Lecture 22 Phys 150 Lecture 24 3 12-Apr-2011

  4. i>clicker question This is an example of solar thermoelectric – utility scale concentrating solar power –same as A. solar photovoltaic solar thermal Also called solar hot water Phys 150 Lecture 22 Phys 150 Lecture 24 4 12-Apr-2011

  5. Equinox House, Urbana, IL 8.2 kW solar PV Average energy use for Equinox House: 1 kW Average energy use for IL house: 1 kW + 4 kW Electricity Natural Gas Phys 150 Lecture 24

  6. Urbana, IL 10 kW solar PV Supplies all of home’s energy except for cooking Phys 150 Lecture 24

  7. Champaign, IL 1.4 kW solar PV Supplies 1/3 of home’s electricity Phys 150 Lecture 24

  8. Champaign, IL 1.4 kW solar PV Federal Tax Credit Supplies 1/3 of home’s electricity DIY cost: $3300 – 30% = $2300 Phys 150 Lecture 24

  9. Wind Turbines Phys 150 Lecture 24

  10. i>clicker question Which of these provides the greatest power per square kilometer? Concentrated Solar Wind Turbines Corn to make Ethanol Sugar Cane to make Ethanol Phys 150 Lecture 22 Phys 150 Lecture 24 10 12-Apr-2011

  11. i>clicker question Which of these provides the greatest power per square kilometer? Concentrated Solar - 15 W/m2 (in deserts) Wind Turbines – 2 W/m2 Corn to make Ethanol – 0.3 W/m2 (US) Sugar Cane to make Ethanol – 1.4 W/m2 (Brazil) Solar PV is 15-20 W/m2 Phys 150 Lecture 22 Phys 150 Lecture 24 11 12-Apr-2011

  12. i>clicker question There is a new wind farm in Paxton (on the way to Chicago) with a nameplate capacity of 150 MW. What’s its average power? 100 MW 45 MW 25 MW 15 MW Phys 150 Lecture 22 Phys 150 Lecture 24 12 12-Apr-2011

  13. i>clicker question There is a new wind farm in Paxton (on the way to Chicago) with a nameplate capacity of 150 MW. What’s its average power? 100 MW 45 MW – capacity factor of 30% 25 MW 15 MW Phys 150 Lecture 22 Phys 150 Lecture 24 13 12-Apr-2011

  14. i>clicker question Which of these energy problems does the US Corn to make Ethanol program help solve? Carbon dioxide emissions Finite fossil fuel resources Energy independence All of the above Phys 150 Lecture 22 Phys 150 Lecture 24 14 12-Apr-2011

  15. i>clicker question Which of these energy problems does the US Corn to make Ethanol program help solve? Carbon dioxide emissions Finite fossil fuel resources Energy independence – replaces gasoline All of the above Unfortunately, it takes as much energy to make corn ethanol as the energy in the ethanol itself Phys 150 Lecture 22 Phys 150 Lecture 24 15 12-Apr-2011

  16. i>clicker question Biodiesel is made from Lignans Cellulose Fat Sugar Phys 150 Lecture 22 Phys 150 Lecture 24 16 12-Apr-2011

  17. i>clicker question Biodiesel is made from Lignan Cellulose Fat – soybean oil (US) Sugar Phys 150 Lecture 22 Phys 150 Lecture 24 17 12-Apr-2011

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