Combined thermal and lighting simulation of envelope ... · Combined thermal and lighting simulation of envelope systems through a fast pre-design software IEA SHC Solar Academy ,

Combined thermal and lighting simulation of envelope systems

through a fast pre-design software

Martin HauerProject Manager Bartenbach [email protected]

Foto: Hufton and Crow

founded 1976 (Prof. Dr. h.c. Ing. Christian

Bartenbach) Independent from manufacturers

90 employees, ca. 40 in lighting design

Location: Aldrans,Austria

More than 10.000 projects worldwide

LIGHTING

DESIGN

LIGHTING

SOLUTIONS

RESEARCH &

DEVELOPMENT

ACADE

MY

Day & artificial lighting design

Competition support

Model construction & simulation

Material- and colour consultation

Secured solution quality

From the concept to the realisation

Special and complex lighting

applications Neutral and independent

from the industry

Latest state of research

One point of contact

Lighting control and Service

Light impact research on beings

Product development for daylight &

artificial light

Energy performance analysis

Optical design

Photometry

Academic symposia

Seminare und Workshops

Light experience worls

DIVISIONSFlexible planning and consulting teams for best

solutions.

Human beings are creatures

of light. Light shapes our daily

rhythm, it influences our

moods

and our ability to perform. The

effect light has on people is

one

of the core issues at

Bartenbach.

Combined thermal and lighting simulation of envelope systems through a fast pre-design software IEA SHC Solar Academy , 18.09.2019

Visual

• Daylight - Level: guiding daylight into buildings

• Daylight - Distribution: homogeneous room distribution

• Glare protection: ensure visual comfort

• View to outside: relation towards outside

Energy

• Overheating avoid during cooling periods in summer

• Solar gains use to reduce heating loads in winter

Non-visual

• Perception and Mood: attention, concentration, memory

• Circadian Rhythm: hormone, heart rate, body temperature

Daylight requirementsrelevant – and concurring – criteria


Visual

• Daylight - Level: guiding daylight into buildings

• Daylight - Distribution: homogeneous room distribution

• Glare protection: ensure visual comfort

• View to outside: relation towards outside

Energy

• Overheating avoid during cooling periods in summer

• Solar gains use to reduce heating loads in winter

Non-visual

• Perception and Mood: attention, concentration, memory

• Circadian Rhythm: hormone, heart rate, body temperature

Daylight requirementsrelevant – and concurring – criteria


Integral Façade controlSolar control vs. Daylight utilization

Without solar control:

• Visual discomfort

• Thermal stress

• High cooling loads

E > 500 lx

L > 5000 cd/m²

80

0 W

/m²

E > 500 lx

L < 3000 cd/m²

80

0 W

/m²

10

0 W

/m²

5 - 8 W/m²

Using shading systems:

• Glare protection

• Reducing solar gains

• High artificial light loads

40

0 W

/m²

T > 26° T < 26°


Motivation


Motivation


Vision


DALEC Online ToolDay- and Artificial Light with Energy Calculation

www.dalec.net

http://www.dalec.net/


Concept

location &

climate datadaylight module

artificial light

modulethermal module

Energy demand:

heating + cooling + lighting [W]

exterior illuminance [lx]

Interior daylight

level [lx]

artificial light demand [W]

Radiation [W] &

Exterior temperatureoccupant &

control module

Facade setting

Switching-/

dimming mode solar gain [W]

Irradiation [W]

(Facade)


Concept

location &


artificial light


Energy demand:



Interior daylight

level [lx]


Radiation [W] &


control module

Facade setting

Switching-/


Irradiation [W]

(Facade)

location &

climate data


Location & Climate data

DALEC Calculationsbased on:

• IWEC2

• TMY3 and

• CWEC

weather data for

• > 3100 Locations worldwide


Concept

location &


artificial light


Energy demand:



Interior daylight

level [lx]


Radiation [W] &


control module

Facade setting

Switching-/


Irradiation [W]

(Facade)

daylight module


Daylight calulation: based on 3-phase method

• division of flux transfer into 3 stages

• time consuming simulations duringpre-calculation

• fast calculation for single sky distributions

• factors stored in database

Daylight module

Sky

–

Facade

Facade-

system

Facade

–

Room

* * *=

result view matrix BSDF daylight matrix sky distribution


Daylight moduleValidation

00:00 06:00 12:00 18:00 00:000

200

400

600

800

1000

1200

1400

1600

1800

2000

Time

Illu

min

ance [

lx]

DALEC

Measurement

Overcast sky


Daylight moduleValidation

Clear sky

00:00 06:00 12:00 18:00 00:000

500

1000

1500

2000

2500

3000

3500

4000

4500

Time

Illu

min

ance [

lx]

DALEC

Measurement


Concept

location &


artificial light


Energy demand:



Interior daylight

level [lx]


Radiation [W] &


control module

Facade setting

Switching-/


Irradiation [W]

(Facade)

artificial light

module


Lumen efficiency method for

• number of luminaires

• resulting average illuminance

Database with precalculatedfactors for normalized lumen output

Artificial light module

Bild: Zumtobel

Available light intensity

distributions

Direct

wide beam diffuse narrow beam

Indirect

wide beam diffuse


Concept

location &


artificial light


Energy demand:



Interior daylight

level [lx]


Radiation [W] &


control module

Facade setting

Switching-/


Irradiation [W]

(Facade)

thermal

module


Dynamic thermal model

• EN ISO 13790

• default values

Input

• weather data

• artificial light (internal gains)

• solar heat gain (through facade)

Output

• energy demand for heating and cooling

• interior temperatures, overheating frequency

Thermal moduleEnergy balance

transmission-

losses

solar

gains

internal gains

(lighting, PC,

etc.)

ventilation

-losses

HVAC

capacity


Thermal characterisation of the facade system

• angular dependency known for glazings

• unkown for daylight systems cannot be neglected

Database:

• angular dependent SHGC (145 Klems directions)

Input:

• SHGC of glazing at normal incidence

Thermal moduleFacade calculation


Concept

location &


artificial light


Energy demand:



Interior daylight

level [lx]


Radiation [W] &


control module

Facade setting

Switching-/


Irradiation [W]

(Facade)

occupant &

control module


Thermal control:

• radiation limit at façade (outside) façade setting

• interior temperature heating / cooling / night ventilation

DALEC controls mimicking occupants:

• luminance threshold at façade (inside) façade setting

• interior temperature window ventilation

Occupant & Control Module


IEA SHC Task 56Building Integrated Solar Envelope Systems for HVAC and Lighting

• Definition of reference office building

• Comparison of different building simulation tools

Comparative simulation studyReference office


DALEC vs. TRNSYS

David Geisler-Moroder Matteo D’Antoni


DALEC vs. TRNSYS

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

Heating Cooling LightingEne

rgy

de

ma

nd

[kW

h/(

m2yr

)]

Stuttgart

DALEC TRNSYS

David Geisler-Moroder @ Bartenbach

Matteo d‘Antoni@ EURAC

Annual energy balance


DALEC vs. TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Stuttgart - Heating

DALEC TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Stuttgart - Cooling

DALEC TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Stuttgart - Lighting

DALEC TRNSYS

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00


rgy

de

ma

nd

[kW

h/(

m2yr

)]

Stuttgart

DALEC TRNSYS




DALEC vs. TRNSYS

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00


rgy

de

ma

nd

[kW

h/(

m2yr

)]

Stockholm

DALEC TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Stockholm - Heating

DALEC TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Stockholm - Cooling

DALEC TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Stockholm - Lighting

DALEC TRNSYS




DALEC vs. TRNSYS

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00


rgy

de

ma

nd

[kW

h/(

m2yr

)]

Rome

DALEC TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Rome - Heating

DALEC TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Rome - Cooling

DALEC TRNSYS

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00


Ene

rgy

de

ma

nd

[kW

h/(

m2m

o)]

Rome - Lighting

DALEC TRNSYS




• Comparison with other simulation tools ongoing

• Application for comparisons of the solutions for envelope-integrated, solar facade

IEA SHC Task 56Building Integrated Solar Envelope Systems for HVAC and Lighting

-50.0

-40.0

-30.0

-20.0

-10.0

0.0

10.0

20.0

30.0

40.0

50.0

60.0

Qheat Qcool Qinf Qvent Qtrans Qgint Qsol

ROME

EP TRN SIM_UIBK SIM_UNIBO DAL MOD

Paper BS 2019, Roma:

Acknowledgments

The Austrian participation in the IEA SHC Task 56 "Building Integrated Solar Facades for Ventilation, Heating, Cooling, Air Conditioning and Lighting" is part of the IEA research cooperation and is funded by the Federal Ministry of Transport,

Innovation and Technology

„BODYBUILD – Boosting Daylight Utilization in Buildings” financed by the Federal Ministry of Austria for Digital and Economic Affairs,

managed by theAustrian Research Promotion Agency FFG

is gratefully acknowledged.

Thank you!

Martin HauerProject Manager Bartenbach [email protected]

Foto: Hufton and Crow

DALEC Online ToolLive Demo!

www.dalec.net

http://www.dalec.net/

Documents

Combined thermal and lighting simulation of envelope ... · Combined thermal and lighting simulation of envelope systems through a fast pre-design software IEA SHC Solar Academy ,