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ControlThe forgotten option in retrofitting
Energy led retrofitting of dwellings04 september2013
Wouter Borsboom*, Leo Bakker*, Ivo Opstelten (Platform31), Wim Kornaat*, Bas Knoll*, Piet Jacobs*
*TNO
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Much achieved in the Netherlands
2
How long does it take to retrofit?
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Prefabricated facades back side
Day 1
3
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Day 2
Prefabricated facades front side
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Prefabricated roof
Day 3
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Day 6/7
Finishing zinc en roof trims
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Day 8
Moving scaffolding
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Final result
Zero energy in 8 days!
Webinar How much money does an average consumer spend on energy in his dwelling in the Netherlands in 15 Years?
42.000 Euro
WebinarDevelopment in retrofitting
TimeE - performance
130.000
100.000
80.000
Zero on the meterInte
gral
reno
vatio
n co
sts
incl
. VAT
Roosendaal 2010
60.000
Kerkrade 2011
Apeldoorn 2012
WebinarOut of a selection of 21 projects in het Netherlands toward nearly zero energy how many houses use control?
11
Ventilation: 3 controlled airflow inlet (passive) and 5 CO2 controlled ventilation systems
Shading: None
Heating/cooling: Most projects have central thermostat
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Why use control
12
Reduce health impact
Improve Comfort
Save Energy
Webinar In the indoor environment what has te greatest impact on health?
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WebinarControl Strategy
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Particle filtration (PM2.5)Example: Filtering of outside air
Low emitting materials
Combustion control (Acrolein) and moisture
Example: multigas sensor
Then dilution ventilation(odour)
Webinar How much energy can we save with ventilation
15
Flow control air inlets
Efficient fans
Improved airtightness
Demand control
Heat recovery
Demand control and heat recovery
WebinarImproved comfort by shading
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0
10
20
30
40
50
60
70
80
90
100
16 18 20 22 24 26
% ti
me
perc
enta
ge b
elow
giv
en v
alue
temp (C)
Tliving
Control of external shadingsolar load (W/m2) n/a/ (no shading) > 300 > 200
Tinside (°C) n/a/ (no shading) n/a > 22
WebinarEnergy saving by shading
17
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
20000
0
200
400
600
800
1000
1200
1400
1600
1800
2000
heat
dem
and
(MJ/
year
)
cool
dem
and
(MJ/
year
)Qcool(MJ) Qheat(MJ)
Control of external shadingsolar load (W/m2) n/a (no shading) > 300 > 200
Tinside (°C) n/a (no shading) n/a > 22
WebinarSaving potential by zone heating
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5,5
16,3
10,6
0,02,04,06,08,0
10,012,014,016,018,020,0
local control bedrooms single person working athome
2 working partners
savi
ng o
n he
atin
g (%
)
Vrijstaand K-peil 45
WebinarHow do people use their windows
19
Molensingel 1 - 64
0
50
100
150
200
250
-6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
buitentemperatuur [oC]
tota
al a
anta
l ope
n ra
men
dinsdag zondag Linear (dinsdag) Linear (zondag)
Depending on outside temperature
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20
Molensingel 1 - 64
0
50
100
150
200
250
-6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
buitentemperatuur [oC]
tota
al a
anta
l ope
n ra
men
dinsdag zondag Linear (dinsdag) Linear (zondag)
Outside Temperature
Num
ber o
f ope
n w
indo
ws
How can we save energy in heating and cooling
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When a warm period / overheating is expected: Additional ventilation to cool building mass utilize solar shading to reduce solar gain
Development of a innovative control in the Herb Project
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project proposal
DCCS
22
Ref 1
Ref 2
Holistic
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First measurements at first test site23
Webinar Challenge: reduce energy and increase user acceptance and well being
