Seyed Amin Tabatabaei

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∫

8. 8
Cool
down
Heating

9. 9
Temporal
Comparison
à Diagnosing
Malfunctioning:
ORIGINAL

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

13. 13
A
Fast
Review:
DataAnalysisComparison
Tin
Tout
Gas Usage
ε: C:

14. 14
A
Fast
Review:
DataAnalysisComparison
Tin
Tout
Gas Usage
ε: C:

15. 15
A
Fast
Review:
DataAnalysisComparison
Tin
Tout
Gas Usage
ε: C:

16. DataAnalysisComparison
Tin
Tout
Gas Usage
ε: C: