Transcript An Energy Impact Assessment Exercise Using Watt Meters

Chris Sinton
University of Redlands
Redlands, California
Energy and the Environment
 200-level elective course (now required for
Environmental Business)
 Present conventional and renewable energy
resources and impacts
 Focus on quantitative evaluation
 Lecture mixed with in-class activities and field
trips
Energy Project - Goals
 If it is personal, you remember it
 Learn how to gather personal energy data
 Calculate environmental impact
 Determine impact of efficiency
 Scale results to campus and state
 Skills
 using spreadsheets
 writing
Equipment
 Kill-A-Watt Meter
 Excel
 Machine(s)
Methodology
 Choose machine or appliance
 Plug in meter
 Take daily reading of kWh and record in Excel
 Repeat for five days.
Analysis
 Plot kWh vs. days
 Determine annual usage and cost
 Determine environmental impact using emission
factors (from US EPA e-grid)
 SOx, NOx, and CO2
Efficiency Impact
 Determine impact of efficiency
 Better machine – Energy Star
 Change in habit
 Economic and Environmental
 Scale results to campus and state
Energy Project Data
input your data
time (hrs)
start
kWh
make calculation
0
0
Day 1
23.88
12.5
Day 2
48.15
25.7
Day 3
71.76
38.5
Day 4
96
49.2
Day 5
120
53.6
average per day
10.72
days per year
365 days
annual usage
kWh/year
cost per kWh
$
0.13
cost per year
Estimated Campus and State-wide Emissions
Number on campus
10
Number in California
500000
Annual - campus
Annual - CA
Annual Emissions (lbs)
NOx
Emission Factors for California
kWh/year
dollars
NOx
0.000543 lb/kWh
0 kWh/year
dollars
SOx
0.000322 lb/kWh
mercury
CO2
0.724 lb/kWh
SOx
CO2
campus
mercury
1.00E-09 lb/kWh
California
source: US EPA E-Grid
Report
 Introduction about appliance
 Methods
 Results
 Plot
 Estimated energy use on campus and statewide
 Environmental impact
 Discussion of efficiency (quantitative)
 Conclusion
 References
Outcome
 Overall successful based on student feedback
 Some students need more guidance in choosing
 Not enough Watt Meters
 Add other environmental impacts – mining,
cooling water