By Bill Baker, Sam Corey, Tom Sattman, and Dan Streeter
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Opportunity Our Home Criteria Ideas and Evaluation Solutions
Summary
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Opportunity: Through new technology, we can make the current
home more sustainable The current home uses minimal energy
Appliances are outdated and inefficient
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Mr. Kulp is a retired electrical engineer and disabled army
veteran Mrs. Kulp is a liberal arts major that worked for family
stores while getting her degree They have both children and
grandchildren that visit them
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Little water use Low-flow showerhead Low- flow toilets Do the
dishes by hand Heat home mostly with electric space heaters When it
is very cold, they use home heating oil to heat their homes to a
comfortable level They wanted this heating system left alone
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Outdated appliances Refrigerator/ freezer Incandescent light
bulbs Washing machine Many standby electronics Three space heaters
775 kwh per month
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Budget Size of homeowners property Easy mobility Willingness of
customer to accept new technology Doesnt bother neighbors
Unaffected by seasonal weather Building codes
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Initial cost less than $15,000 Must yield savings within a few
years Decrease electricity usage Fast installation Minimal training
or hassle required Aesthetically pleasing to the customer and
neighbors Does not disturb the customers current way of life/
mobility
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Replace appliances Refrigerator/ freezer Incandescent light
bulbs Washing machine Install solar panels Limit current energy
usage Smart power strip Programmable thermostat
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Refrigerator/ freezer Their refrigerator uses about 1150 kwh of
electricity per year which costs $80.50 A new 18.5 cubic foot
Kenmore refrigerator freezer would cost $760 and only use 476 kwh
which would cost about $32.32
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16 incandescent bulbs 4 CFL bulbs LEDCFLIncandescent Light bulb
projected lifespan50,000 hours10,000 hours1,200 hours Watts per
bulb (equiv. 60 watts)101460 Cost per bulb$35.95$3.95$1.25 KWh of
electricity used over 50,000 hours5007003000 Cost of electricity (@
0.10per KWh)$50$70$300 Bulbs needed for 50k hours of use1542
Equivalent 50k hours bulb expense$35.95$19.75$52.50 Total cost for
50k hours$85.75$89.75$352.50
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Current washing machine: 40 gallons per load + 40 more for
rinse cycle New Frigidaire FAFW3801: 11 gallons per load + rinse
cycle MSRP of $599
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24 panels on the roof of the house Average output with 5 hours
of sunlight per day is 785 kwh per month 30% rebate
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Phantom loads account for 7% of average electricity Cost $30
apiece Need 2-3 power strips to eliminate all phantom loads
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Have a manual thermostat Wide price range $15 - $400 Change
temperature automatically based upon what time of day it is
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Initial Idea Evaluation Ideas Criteria Solar Panels
Programmable Thermostat Replace Light Bulbs Replace Refrigerator
Replace Washer Smart Power Strip Initial Cost------ Long Term
Savings+0++++ Sustainability++++++ Easy Installation-+++++ Easy
Use+00000 Eye Appeal+00+00 Comfort000+00 Total212422 Rank373133
ActionEvaluateThrow OutEvaluate
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Pairwise Comparisons CriteriaABCDEFGTotalPercent A 1 1/4
1/6247721.42 19.00% B 41 1/3457728.33 25.13% C 631568837.00 32.82%
D 1/2 1/4 1/7124411.89 10.55% E 1/4 1/5 1/6 1/21338.12 7.20% F 1/7
1/8 1/4 1/3112.99 2.66% G 1/7 1/8 1/4 1/3112.99 2.66% Total
112.75100.00% Key SymbolCriteria AInitial Cost B Long-Term Savings
CSustainability DEasy Installation EEasy Use FEye Appeal
GComfort
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Weighted Comparison Ideas Solar Panels Replace Light Bulbs
Replace RefrigeratorReplace WasherSmart Power Strip
CriteriaWeightRatingScoreRatingScoreRatingScoreRatingScoreRatingScore
Initial Cost19.00%10.1920.381.50.2851.50.28520.38 Long Term
Savings25.13%41.00524 30.753941.005230.7539
Eco-friendly32.82%51.64141.312830.984641.312830.9846 Easy
Installation10.55%30.31653 40.42230.316540.422 Easy
Use7.20%30.21640.2884 4 4 Eye Appeal2.66%30.07982.50.066530.07983 3
Comfort2.66%2.50.06652.50.066530.07983 3 Total100.00% 3.515 3.4355
2.8931 3.3671 2.9881 Rank 1 2 5 3 4 Action Use
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We will replace Washing machine Light bulbs Refrigerator We
will install Solar panels Three smart power strips
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Solar Panels$6,426 Refrigerator$760 Washing Machine$600 LED
Bulbs$576 Smart Power Strips$90 Cost of Upgrades$8,452 Cost Plus
Overhead$11,833
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Solar Panels will generate about 9,420 kwh per year Frigidaire
FAFW3801 washer will save on average 50 gallons per load LED Bulbs
will save about 860 kwh per year New refrigerator freezer will save
674 kwh per year Smart power strips will save about 550 kwh per
year of their total energy bill
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The solar panels will generate an excess of about 2,200 kwh per
year If we sell it back to the grid at 5 cents per kwh, the
electricity company will have to pay them $110 per year
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We spent $11,833 of the $15,000 budget We will be saving a lot
of resources They will be selling excess electricity back to West
Penn Power Their house will increase in value