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ICT4S - A data analysis approach for diagnosing malfunctioning in domestic space heating
1. A
Data
Analysis
Approach
for
Diagnosing
Malfunctioning
in
Domestic
Space
Heating
Seyed
Amin
Tabatabaei
1
2. 2
Where
do
we
use
energy?
Smart
Thermostat
can
save
energy
What
we
need
:
A
model
of
the
house
3. 3
1-‐ loss
rate,
ε:
2-‐ Thermal
Capacity,
C:
A
simple
model:
degree
day:
two
concepts:
4. 4
1-‐ loss
rate,
ε:
2-‐ Thermal
Capacity,
C:
A
simple
model:
degree
day:
two
concepts:
5. 1-‐ Cooling
down
Periods
2-‐ Heating
Periods
5
ε
C
=
-ΔTin
(Tin − Tout )dt∫
Pr ovided Energy = ε (Tin − Tout )dt∫ + CΔTin
Our
Data
Tindoor
Toutdoor
Gas
Usage
6. 1-‐ Cooling
down
Periods
2-‐ Heating
Periods
6
Our
Data
Pr ovided Energy = ε (Tin − Tout )dt∫ + CΔTin
ε
C
=
-ΔTin
(Tin − Tout )dt∫
Tindoor
Toutdoor
Gas
Usage
7. 1-‐ Cooling
down
Periods
2-‐ Heating
Periods
7
Pr ovided Energy = ε (Tin − Tout )dt∫ + CΔTin
Our
Data
Tindoor
Toutdoor
Gas
Usage
ε
C
=
-ΔTin
(Tin − Tout )dt∫
10. 10
1st kind
of
Malfunctioning:
Drop
in
the
performance
of
heating
system
ORIGINAL
εà +33%
,
Cà+33%
1stMalfunctioningεà 24%
,
C
à+8%
2ndMalfunctioning
ε à +6%
,
Cà -‐7%
3rdMalfunctioning
11. 11
ORIGINAL
εà +33%
,
Cà+33%
1stMalfunctioningεà 24%
,
C
à+8%
2ndMalfunctioning
ε à +6%
,
Cà -‐7%
3rdMalfunctioning
2nd kind
of
Malfunctioning:
High
infiltration
by
leakage
12. 12
ORIGINAL
εà +33%
,
Cà+33%
1stMalfunctioningεà 24%
,
C
à+8%
2ndMalfunctioning
ε à +6%
,
Cà -‐7%
3rdMalfunctioning
3rd kind
of
Malfunctioning:
High
Infiltration
by
leaving
windows
open