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A Feasibility Study: Mining Daily Traces For Home Heating Control. Dezhi Hong, Kamin Whitehouse University of Virginia. Motivation. Building Energy Data Book, 2011 U.S. Department of Energy. Smart Thermostat, SenSys ’ 10. Temperature ( o F). Fast reaction. Preheating. 75. 70. 65. 60. - PowerPoint PPT Presentation
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A Feasibility Study: Mining Daily TracesFor Home Heating Control
Dezhi Hong, Kamin WhitehouseUniversity of Virginia
Motivation
2
Building Energy Data Book, 2011U.S. Department of Energy
00:00 24:0008:00 18:00
Smart Thermostat, SenSys’10
3
55
60
65
70
75
Te
mp
era
ture
(oF
)
Home Home
Fast reaction Preheating
4
“How much energy can be savedwith better prediction of arrival times?”
Energy Savings
5
OptimalSmart
Smart: 28.8%
A B C D E F G H
En
erg
y S
avin
gs
(%)
0
10
20
30
40
50
60
Home Deployments
Optimal: 35.9%
State of the Art GPS Thermostat, Pervasive’09
Estimate travel-to-home time Dynamically adjust heating Simple programmable and manual
baseline 6% savings
6
State of the Art PreHeat, Ubicomp’11
Compute the future occupancy Pr.
A programmable baseline with fixed schedule
Save 8%~18% gas
7
State of the Art
8
Info. outside home
History
GPS Thermostat
PreHeatSmart Thermostat
Our Approach
Approach Overview
10
6pm12am 9am 12am7pm
…… …… ……
Home Work Home
time@leave the HOUSE time@leave the OFFICE allow error range ε
Data SourceYohan Chon et.al Ubicomp’12
Continuously run in background Ground truth is manually labeled 4 persons, 120~140 days
12
Evaluation Error of Arrival Time Prediction
13
2.7%~55.8% lower errors
Evaluation Different Heating Stages Smart Thermostat, Sensys’12
14
Preheat 24 min + 1.1 kWhMaintain 18 min + 0.9 kWhReact 6 min + 1.6 kWh
Evaluation Energy Savings and # of Training Days
8.3% to 27.9% savings than baseline
Evaluation Miss Time
16
14.9%~59.2% reduction in miss time
-200 min 0 minute
Error Distribution
+200 min
Conclusions Daily mobility traces A conditional model, we achieve
potential savings: 8.3%~27.9%, on average miss time: 14.9%~59.2% reduction
Future Work Seasonal weather change Other locations in GPS trajectory
18
Q & A
19
Thank you!
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