webinar control the forgotten option in retrofitting energy led retrofitting of dwellings 04...

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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?

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?

13

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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

15

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

10

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80

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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

2000

4000

6000

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10000

12000

14000

16000

18000

20000

0

200

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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

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

an

tal o

pe

n r

am

en

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

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

22

Ref 1

Ref 2

Holistic

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First measurements at first test site

23

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