2/25/10 Next homework due available in D2L! “The World We Create” NATS 101 Section 6.
“The World We Create” NATS 101 Section 6
description
Transcript of “The World We Create” NATS 101 Section 6
![Page 1: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/1.jpg)
““The World We Create”The World We Create”NATS 101NATS 101Section 6Section 6
Remember, Project 1 due this Tuesday
02/11
Be aware! Cooperate!You will be asked to
actively participate in the Debate today.
![Page 2: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/2.jpg)
UNIT 1: Energy Sources,
Conventional or Alternative?
Alternative Sources
![Page 3: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/3.jpg)
Our FocusEvaluate an alternative energy source considering
a variety of factors such as:
Availability of source; Renewability; Environmental impact; Energy content; Price; Diversity of transformation devices; Efficiency of transformation devices; Political, economic, and social impact;
![Page 4: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/4.jpg)
Solar Energy Two different types of solar energy:
Energy is captured by solar devices, such as photovoltaic cells.
Other energy sources that are created by energy from the sun, such as biofuels.
Primary
Direct
Secondary
Indirect
![Page 5: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/5.jpg)
$$ Solar Panels $$
You’re building a new house, and are particularly concerned with “Going Green”, you’re thinking of
installing Solar Panels.How many do you need?How much does it cost?
Is it worth doing?
![Page 6: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/6.jpg)
Energy Needs1. Energy used per day: (24 h) x (1.2 kWh / h) = 28.8 kWh 28.8 kWh x (1000 Wh / kWh) = 28,800 Wh
2. Energy generated per day In Tucson: (5.4 h ) x (10 Wh / h / ft2) = 54 Wh / ft2 (total during Tucson’s daylight hours)
3. Square feet of solar panels needed:
(28,800 Wh) x (1 ft2 / 54 Wh) = 533 ft2 in Tucson
![Page 7: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/7.jpg)
Let’s Calculate: CostAgain discuss with your group the following
calculations (you have ~5 minutes) :
4. What is the total cost for powering a) Tucson Home; b) Chicago Home using solar panels?
5. Over 20 years the total energy required to operate the average home is 210,240 kWh. Given this energy requirement and the cost you calculated above, what is the cost (in cents / kWh) of the solar panels over this 20 year period?Compare this with the cost of coal based energy 8.35 cents /kWh.
You have 5 minutes
![Page 8: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/8.jpg)
Cost Determination4. Cost for a single home in Tucson: (533 ft2) x ($56 / ft2) = $29,866
5. Cost over 20 years in Tucson: ($29866) x (100 cents / $1) = 2986666 cents
(total cost in cents) / (total energy requirements) =(2986666 cents) / (210240 kWh) = 14.205 cents/kWh
![Page 9: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/9.jpg)
Analysis:6. Given all the data you have, would you
install solar panels to operate your home? Why or why not?
7. What considerations did you have to think about in making your decision whether or not to install solar panels.
8. Which of your considerations did you value the most? Why?
You have 5 minutes
![Page 10: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/10.jpg)
Solar Energy
Weaknesses:
Cost, device efficiency, intermittency, storage.
Strengths:
Renewable, availability, peak service, long-lasting, no emissions, low maintenance.
However, when and where electricity is delivered is often
more important than price.
![Page 11: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/11.jpg)
BiofuelsChemical compounds derived from renewable resources such as plant or animal materials
that can undergo a combustion reaction.
Ethanol
Produced by fermentation of sugar-rich substrates (corn,
starch, sugar cane, etc.)
Biodiesel
Made from vegetable oils, animal fats or recycled
greases.
![Page 12: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/12.jpg)
The Great DebateShould we us Ethanol as an
alternative Fuel?
![Page 13: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/13.jpg)
ObjectivesUpon completion of all debates,
you should be able to:
Form an opinion either for or against the use of ethanol as an alternative fuel.
Be able to justify that opinion using pros or cons from “at least” 3 of the 4 debates
![Page 14: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/14.jpg)
4 Categories4 Categories
![Page 15: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/15.jpg)
FRONT CLASSROOM
A FC
D
E
B IG
H
Ethanol Debate
Economy Con
Economy Pro
Dependence Pro
Dependence Con
Pro Con Environment
Energy Supply Pro
Energy Supply Con
![Page 16: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/16.jpg)
The Rules• Moderator presents question• 1 minute per initial response• 30 seconds per rebuttal• Repeat for other side• Questions from other group
members (time permitting)• Same rules apply from above
![Page 17: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/17.jpg)
Our ExpectationsTo Earn Participation Points Today:
• Be Courteous• Respectful Listening
• Take Notes (Hint, Hint)
![Page 18: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/18.jpg)
Before We Begin
![Page 19: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/19.jpg)
Debate #1$$ Economy $$
Q#1: (Pros) If the U.S. stopped producing ethanol, how would it hurt our economy?
Q#2: (Cons) If the U.S. increased the production of ethanol, using current methods, how would it hurt our economy?
![Page 20: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/20.jpg)
Debate #2Environment
• Q#1: (Cons) Using ethanol (as an alternative) has been reported to reduce pollution. Do you agree with this claim? Please elaborate
• Q#2: (Pros) Would you say that ethanol use is good for the environment as a whole?
![Page 21: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/21.jpg)
Debate #3Energy Efficiency
• Q#1: Ethanol contains approximately 34% less energy per unit of volume than gasoline, and therefore burning pure ethanol in a vehicle would result in a 34% reduction in miles per gallon, why would we possibly want to use ethanol as an alternative fuel for gasoline?
• Q#2: The U.S. produces most of its ethanol from corn what makes this way less efficient and effective than places like Brazil who produce their ethanol from sugar cane?
![Page 22: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/22.jpg)
Debate #4• Q#1: (Pros) In regards to our country’s
“dependence,” why should our country invest in ethanol production?
• Q#2: (Cons) Will production of ethanol be a means to an end of our “dependence?” Justify
Dependence on Foreign Oil
![Page 23: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/23.jpg)
Let’s Recap:• We watched 4 different debates on
whether or not we should use ethanol as an alternative source of fuel.
• We heard differing opinions on those debates.
• Those debating shared with us their reasons and justifications for their opinions.
![Page 24: “The World We Create” NATS 101 Section 6](https://reader035.fdocuments.us/reader035/viewer/2022062501/56816163550346895dd0ef2b/html5/thumbnails/24.jpg)
Now, Take a Minute or Two…
• Did your opinion (either for or against the use of ethanol as an alternative fuel source) change after watching or taking part in the debate? Please write it down individually on a piece of paper.
• What’s something that you learned today from the debate?