CH217 - Homework

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Name

Appliance

Energy Consumption (J/year)

Number on Campus

Total Energy

example

microwave

3.73 * 10^4 kJ/year

1077.1

4.01 * 10^7 kJ

Sarah

Cell chargers

1.45 *10^7 J/year

1764

2.56 *10^7kJ

Andy

Laptop chargers

4.60 E8 J/year

1867

8.59 E8 kJ

Reuben

Televisions

 

 

  99600kj/female-yr; 24300kj/male-yr

960 female; 790 male

* *2.88E8kJ/yr

Erin

Hair Straighteners

1.96 * 10^7 J/year

966.7

3.45 *10^7 kJ

Rachael

Lamps

9.58 E7 J/yr

1717

1.65 E8 kJ

Amy

Refrigerators

2.7 * 10^8 J/year

600

1.62 * 10^9 kJ

Devon

Speakers

6.93 * 10^7 J/year

1235

8.56 * 10^7 kJ

Mike

Electric Razors

1.79 * 10^3 J/year

706

1.26 * 10^5 kJ

Kimberly

clocks

1.36 x 10^8 J/yr

752

2.4 x 10^8 kJ/yr

Greg

Coffee Maker

1.281 x 10^5 kJ/year

176.4

2.260 x 10^7 kJ/yr

Josie

Microwave

5.3 * 10^5 kJ/year

875

4.6 * 10^8 kJ

Trevor

Gaming Console

 

 

 

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Assuming that Televisions only draw energy while being used (false assumption so is an underestimate of actual usage):
Average Usage per Female per Day (including those without TVs): 273 kJ/day
Average Usage per Male per Day (including those without TVs): 667 kJ/day
If there are approx. 960 females (54.8%) and 790 males on campus (Total 1750 students), then:
Total Female Usage per Year = 273 kJ/female-day*365 days/yr*960 females = 9.55E7kJ/yr
Total Male Usage per Year = 667 kJ/femalemale-day*365 days/yr*790 males = 1.92E8kJ/yr
Total Energy Usage per Year = 9.55E7kJ/yr + 1.92E8kJ/yr = 2.88E8kJ/yr

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