modeling and control of intelligent glazed facades · intelligent glazed facades mingzhe liu phd...

Modeling and Control of Intelligent Glazed Facades

Mingzhe Liu PhD Student

ml@civil.aau.dk SBi

Aalborg University

ml@civil.aau.dk 1 25/05/2014

25/05/2014 ml@civil.aau.dk 2

PhD project

Simplified method Control strategies

Validation and test

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Intelligent glazed facade

Organisation of model

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Glazing

Solar control

Night

insulation

Room model

Visual

comfort

Thermal

comfort

Energy

demand Weather

information

Natural

Ventilation

Indoor

comfort

requirement

Output Model

properties Input

Control strategies

Simplified method interface

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Building information Facade information U-value g value

Orientation 0

Building construction Area (m2) U-value Total facade area (m2) 9

Wall west 15 0 Ratio of glazed facade (%) 40,00%

Wall east 15 0 Glazed facade (m2) 2,52 1,4 0,61

Wall north 9 0 Facade frame (m2) 1,08 1,4

Ceilling 15 1E-09 Opaque part of the facade (m2) 5,4 0,366

Floor 15 1E-09 Glazing type 1

Insulation position 1

Blind position 1

Building services Control strategies On/OffIndoor

set-point

Outdoor

set-point Area (m2) 15 Control mode 0

Internal load (W) 150 Control blind 1 24

Heating set-point (°C) 20 Control insulation 1

Cooling set-point (°C) 26 Glare 1

Working time 8 17 Natural ventilation 1 23 12

Mechanical ventilation (l/s per m2) 1,2 Night cooling 1 18 12

lighting 1

Room model_EN 13790

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Energy comparison

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Energy comparison

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Control strategies

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Control- occupied hour

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Blind cut-off/glare

Natural ventilation/>23°C

Blind closed/>24°C

Cooling/>25°C

Natural ventilation/CO2

Heating/<20°C

Control- unoccupied hour

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Night insulation/depend

on heat loss

Blind closed/>25°C

Night cooling

Case study

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http://www.sophienberg.com/nyheder.html

Case study

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BR10 2020

Area (m2) 7405 7405

Heat capacity (Wh/Km2) 120 120

Office hour 8-17 8-17

Internal load (W/m2) 10 10

Heating temp (°C) 20 20

Cooling temp (°C) 25 25

Ventilation (l/sm2)

(On office hour) 1,2 1,2

Lighting (W/m2)

(on/off 250Lux) 7 7

U-value opaque wall

(W/Km2) 0,13 0,09

Fan efficiency (kJ/m3) 2 0,5

Heat exchange 0,85 0,85

Infiltration (l/sm2) 0,06 0,03

Control strategies

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Control strategies

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Comfort

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Glazing ratio- without control_BR10

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total

60,66595

64,04106

72,46244

78,32032

83,83193

96,04185

108,8913

122,3169

135,9878

149,7798

0

20

40

60

80

100

120

140

160

180

20% 30% 40% 45% 50% 60% 70% 80% 90% 100%

Ene

rgy

de

man

d K

Wh

/m2

Ratio of glazed facade without control_BR10

heating cooling lighting ventilation

2010

2015

2020

Glazing ratio- with control_BR10

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total

54,54015

49,16877

47,30899

47,7191

48,57194

49,67303

51,83446

55,05471

58,7178

62,5055

0

10

20

30

40

50

60

70

20% 30% 40% 45% 50% 60% 70% 80% 90% 100%

Ene

rgy

de

man

d K

Wh

/m2

Ratio of glazed facade with control_BR10

heating cooling lighting ventilation

2010

2015

2020

Glazing ratio- without control_2020

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lighting

ventilati

on total

25,3758 3,404543 50,93151

16,89318 3,404543 54,5644

12,26467 3,404543 63,75017

10,98597 3,404543 70,12153

10,19354 3,404543 76,0839

9,058925 3,404543 89,35562

8,464602 3,404543 103,2895

8,266494 3,404543 117,5223

8,176445 3,404543 132,1753

8,032367 3,404543 147,0667

0

20

40

60

80

100

120

140

160

20% 30% 40% 45% 50% 60% 70% 80% 90% 100%

Ene

rgy

de

man

d K

Wh

/m2

Ratio of glazed facade without control_2020

heating cooling lighting ventilation

2015

2020

2010

Glazing ratio- with control_2020

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32,12317

35,74741

39,69853

29,71298

25,44768

24,4427

25,18293

25,55966

27,48913

30,43329

34,00393

38,3997

43,18819

0

20% 30% 40% 45% 50% 60% 70% 80% 90% 100%

Ene

rgy

de

man

d K

Wh

/m2

Ratio of glazed facade_2m_with control

heating cooling lighting ventilation

0

5

10

15

20

25

30

35

40

45

20% 30% 40% 45% 50% 60% 70% 80% 90% 100%

Ene

rgy

de

man

d K

Wh

/m2

Ratio of glazed facade with control_2020

heating cooling lighting ventilation

2020

2015

Experiment

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On going….

Preliminary results

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Comparison on heating and cooling load

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Comparison on heating and cooling consumption

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Thank you!