toyo
TRANSCRIPT
Energy Research Project
Trends in fuel consumption and heating homes in Sitka, Alaska
Kate CoseoED 630 - October 2007
The QuestionsThe Questions
How much is energy is consumed heating my living space using a Toyostove L-56 stove?
How can I heat the space more efficiently?
How much is energy is consumed heating my living space using a Toyostove L-56 stove?
How can I heat the space more efficiently?
Why ask such questions?Why ask such questions?
• Fuel costs are on the rise
• 80% of Sitka residents use kerosene (No. 1 fuel oil) to heat homes.
http://www.city-data.com/housing/houses-Sitka-Alaska.html
• Fuel costs are on the rise
• 80% of Sitka residents use kerosene (No. 1 fuel oil) to heat homes.
http://www.city-data.com/housing/houses-Sitka-Alaska.html
Background InformationBackground Information The toyostove L-56
uses No.1 fuel oil The L-56 model is
92% efficient There are three burn
modes which produce: High - 22,000BTU/hr Med - 15,000 BTU/hr Low - 8,000BTu/hr
Current cost of fuel/gallon is $3.322 in Sitka, Alaska
The toyostove L-56 uses No.1 fuel oil
The L-56 model is 92% efficient
There are three burn modes which produce: High - 22,000BTU/hr Med - 15,000 BTU/hr Low - 8,000BTu/hr
Current cost of fuel/gallon is $3.322 in Sitka, Alaska
www.toyotomiusa.com
MethodologyMethodology
The ToyoStove L-56 was monitored for 14 days.
Burn rates and amount of time burning were documented.
The L-56 is the only source of heat in the house.
The house was heated to a maximum of 70°F
The ToyoStove L-56 was monitored for 14 days.
Burn rates and amount of time burning were documented.
The L-56 is the only source of heat in the house.
The house was heated to a maximum of 70°F
Data Collection: Step 1Data Collection: Step 1
Day time time burning(hr) rate burn fuel consumed gal/hr6:15-7:15am 1 0.203 0.203
Friday 9/28 5-5:20pm 0.33 0.203 0.066995:20-5:45pm 0.42 0.113 0.047465:45-7pm 1.25 0.113 0.14125
70' 7-10:00pm 3 0 0day total 0.4587
Sat 9/29 9-10:00am 1 0.301 0.301(60') 10-11:20am 1.33 0.203 0.26999
11:20-12:15pm 0.92 0.113 0.1039612:15-12:45pm 0.5 0.203 0.1015
(70') 12:45-8:30pm 8.74 0.113 0.98762day total 1.76407
Day time time burning(hr) rate burn fuel consumed gal/hr6:15-7:15am 1 0.203 0.203
Friday 9/28 5-5:20pm 0.33 0.203 0.066995:20-5:45pm 0.42 0.113 0.047465:45-7pm 1.25 0.113 0.14125
70' 7-10:00pm 3 0 0day total 0.4587
Sat 9/29 9-10:00am 1 0.301 0.301(60') 10-11:20am 1.33 0.203 0.26999
11:20-12:15pm 0.92 0.113 0.1039612:15-12:45pm 0.5 0.203 0.1015
(70') 12:45-8:30pm 8.74 0.113 0.98762day total 1.76407
The following table was continued for the entire 14 day study:
Data Collection: Step 2Data Collection: Step 2
Day Average fuel burned (gal) Fuel cost ($3.22/gal)Fri 9/28/2007 0.46 1.52812Sat 9/29/2007 1.76 5.84672Sun 9/30/2007 1.08 3.58776Mon 10/1/2007 1.53 5.08266Tues 10/2/2007 1.1 3.6542Weds 10/3/2007 0.93 3.08946Thurs 10/4/2007 0.91 3.02302Fri 10/5/2007 1.13 3.75386Sat 10/6/2007 2.11 7.00942Sun 10/7/2007 1.24 4.11928Mon 10/8/2007 1.5 4.983Tues 10/9/2007 0.8 2.6576Weds10/10/2007 1.02 3.38844Thu 10/11/2007 1.46 4.85012
total cost ($) 56.57366
The data was then compiled in the following table:
Errors and AssumptionsErrors and Assumptions In order to preserve my
sanity, I would check the stove every ~30 minutes to observe at which rate the stove was burning.
It is possible that the times I calculated at certain burn rates are not exact, however, the results still give a solid prediction.
When estimating yearly costs, I assumed I would be heating the house for eight months (Sept - April)
In order to preserve my sanity, I would check the stove every ~30 minutes to observe at which rate the stove was burning.
It is possible that the times I calculated at certain burn rates are not exact, however, the results still give a solid prediction.
When estimating yearly costs, I assumed I would be heating the house for eight months (Sept - April)
Data AnalysisData Analysis
Fuel Estimates based on Lifestyle TrendsAmount of fuel (gal) Fuel Cost ($)
MAT life: work Tu-Fri; Sat-MonWeek 8.52 28.30344Month 34.1 113.2802Year 272.8 906.2416
Fuel Estimates based on Lifestyle TrendsAmount of fuel (gal) Fuel Cost ($)
MAT life: work Tu-Fri; Sat-MonWeek 8.52 28.30344Month 34.1 113.2802Year 272.8 906.2416
Based on the data generated, I was able to make predictions on future consumption trends.
The table below represents my current consumption trends.
Based on the data generated, I was able to make predictions on future consumption trends.
The table below represents my current consumption trends.
The yearly prediction assumes 8 months of stove use (Sept-April)
What if….?What if….? Once a baseline set of data was established, the next step was to evaluate how
changing my behaviors could alter fuel consumption.
Because I was already turning the stove off at night and while I was at work, the challenge was to investigate how else I could decrease fuel consumption without sacrificing comfort.
The following slide illustrates how fuel consumption might respond if I change my lifestyle.
Once a baseline set of data was established, the next step was to evaluate how changing my behaviors could alter fuel consumption.
Because I was already turning the stove off at night and while I was at work, the challenge was to investigate how else I could decrease fuel consumption without sacrificing comfort.
The following slide illustrates how fuel consumption might respond if I change my lifestyle.
What if….Fuel Consumption Predictions
What if….Fuel Consumption PredictionsFuel Estimates based on Lifestyle Trends
Amount of fuel (gal) Fuel Cost ($)MAT life: work Tu-Fri; Sat-MonWeek 8.52 28.30344Month 34.1 113.2802Year 272.8 906.2416
Traditional style: work M-F; Sat-SunWeek 7.95 26.4099Month 31.82 105.70604Year 254.54 845.58188
What if: only set at low burn modeand don't turn off during day? (6am-10pm)Week 12.656 42.043232Month 50.624 168.172928Year 404.992 1345.38342
What if: only set at low for time at home?(6am-7:30am) (5-10pm)/8-12+4-10Week 2.26 7.50772Month 9.04 30.03088Year 72.32 240.24704
* Yearly estimate assumes house is being heated 8 months of the year. Sept-April
Fuel Estimates based on Lifestyle TrendsAmount of fuel (gal) Fuel Cost ($)
MAT life: work Tu-Fri; Sat-MonWeek 8.52 28.30344Month 34.1 113.2802Year 272.8 906.2416
Traditional style: work M-F; Sat-SunWeek 7.95 26.4099Month 31.82 105.70604Year 254.54 845.58188
What if: only set at low burn modeand don't turn off during day? (6am-10pm)Week 12.656 42.043232Month 50.624 168.172928Year 404.992 1345.38342
What if: only set at low for time at home?(6am-7:30am) (5-10pm)/8-12+4-10Week 2.26 7.50772Month 9.04 30.03088Year 72.32 240.24704
* Yearly estimate assumes house is being heated 8 months of the year. Sept-April
Changes in Consumption: Graphical RepresentationChanges in Consumption: Graphical Representation
Fuel Consumption Trends
0
50
100
150
200
250
300
350
400
450
Current Traditional work week Low Burn Mode keep onduring day
Low burn mode while athome
Lifestyle
Fuel consumed (Gallons)
Week
Month
Year
Fuel Consumption Trends
0
50
100
150
200
250
300
350
400
450
Current Traditional work week Low Burn Mode keep onduring day
Low burn mode while athome
Lifestyle
Fuel consumed (Gallons)
Week
Month
Year
ConclusionsConclusions
A greater amount of fuel was burned on weekends.
Manually setting the burn mode on low would reduce fuel consumption.
Turning the stove off during the night, and while not at home greatly reduces the amount of fuel consumed.
A greater amount of fuel was burned on weekends.
Manually setting the burn mode on low would reduce fuel consumption.
Turning the stove off during the night, and while not at home greatly reduces the amount of fuel consumed.
Questions for Further Study
Questions for Further Study
What if the home was kept at 68°F instead of 70 °F?
What if the door closest to the heater was not opened 25+ times/day to let the dogs out?!?
What if the house was better insulated?
What if the home was kept at 68°F instead of 70 °F?
What if the door closest to the heater was not opened 25+ times/day to let the dogs out?!?
What if the house was better insulated?