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ControlThe forgotten option in retrofitting

Energy led retrofitting of dwellings

04 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

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Development in retrofitting

TimeE - performance

130.000

100.000

80.000

Zero on the meterInte

gral

ren

ovat

ion

cost

s in

cl. V

AT

Roosendaal 2010

60.000

Kerkrade 2011

Apeldoorn 2012

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Out of a selection of 21 projects in het Netherlands toward nearly zero energy how many houses use control?

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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

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Reduce health impact

Improve Comfort

Save Energy

Webinar In the indoor environment what has te greatest impact on health?

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Control 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

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Flow control air inlets

Efficient fans

Improved airtightness

Demand control

Heat recovery

Demand control and heat recovery

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Improved comfort by shading

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0

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16 18 20 22 24 26

% t

ime

per

cen

tag

e b

elo

w g

iven

val

ue

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

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Energy saving by shading

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0

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20000

0

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hea

t d

eman

d (

MJ/

year

)

coo

l dem

and

(M

J/ye

ar)

Qcool(MJ) Qheat(MJ)

Control of external shading

solar load (W/m2) n/a (no shading) > 300 > 200

Tinside (°C) n/a (no shading) n/a > 22

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Saving potential by zone heating

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5,5

16,3

10,6

0,0

2,0

4,0

6,0

8,0

10,0

12,0

14,0

16,0

18,0

20,0

local control bedrooms single person working athome

2 working partners

savi

ng

on

hea

tin

g (

%)

Vrijstaand K-peil 45

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How do people use their windows

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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

an

tal o

pe

n r

am

en

dinsdag zondag Linear (dinsdag) Linear (zondag)

Depending on outside temperature

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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

an

tal o

pe

n r

am

en

dinsdag zondag Linear (dinsdag) Linear (zondag)

Outside Temperature

Nu

mb

er o

f o

pen

win

do

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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InnoEnergy project

proposalDCCS

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Ref 1

Ref 2

Holistic

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First measurements at first test site

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Webinar Challenge: reduce energy and increase user acceptance and well being