cept nze arch2030 v3

7/29/2019 Cept Nze Arch2030 v3

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1 PrivilegedandConfidential TheWeidt Group 2012

Case Study

Net-Zero Energy Building

At CEPT University, Ahmedabad, India

Antech Consultants, Pankaj Dharkar & Associates, Schneider Electric India, VMS Consultants, London Infotech, Mechartes


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Tour of Ahmedabad City of Vibrant Culture & Architecture


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Site Conditions


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Predesign analysis

Building massing options

Daylighting, shading and fenestration options

HVAC system options lifecycle cost analysis

Thermal comfort analysis

HVAC system capacity optimization

Isolated ECMs for systems optimization

Bundles ECMs for systems optimization

Iterative Analysis in Design Energy Design Assistance


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Pre-Design Analysis

-

CEPT NZE Benchmark Building

KWh/m2

Total

KWh/m2

Bundle 1 Bundle 2 Bundle 3 Bundle 4 Notes

Benchmark Energy Use 237

Strategies: Predesign Savings Estimate Savings

Massing/Orientation

Building Size (m2) 800

Number of floors 3 3 3 3

Building Aspect Ratio (Length/Width)

3 to 1 along East-West Axis 0 to 1 1 1

2 to 1 along East-West Axis 0 to 1 1 1

1 to 1 0

2 to 1 along North-South Axis 0 to -1

3 to 1 along North-South Axis 0 to -2

Window to wall area

20% window to wall 1 to 3 1

30% window to wall 0 to 1 1 1

40% window to wall 0 to -2 1

50% window to wall -2 to -360% window to wall -3 to -5

Daylighting

% daylit

area 89% 89% 96% 96%KWh/m2

savings 48 t o 59 48 to 59 52 to 64 52 t o 64

Automatic daylighting controls 1 1 1 1

Envelope Properties

Wall

R-2.6 wall assembly 0 to 1 1 1

R-3.5 wall assembly 0 to 1 1R-4.4 wall assembly 0 to 1 1

Roof

R-5.3 roof assembly 1 to 3 1 1

R-7 roof assembl 2 to 4 1 1

30% to 35%

45% to 50%

65% to 70%

65% to 70%

Note: Energy use and savings are

based on a benchmark building in

this climate zone and are provided

to assess project goals in the

predesign stage. Actual savings

will depend on design decisions

and building operations.

0 50 100 150 200 250

Benchmark

Bundle 1

Bundle 2

Bundle 3

Bundle 4

Heat Cool Fan/ Pump DHW Lights Equip


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Energy Efficiency Sample Study Pre-design Bundle ResultsKWh/m

2

58

237

0 50 100 150 200 250

Benchmark

Bundle 4

Heat Cool Fan/ Pump DHW Lights Equip

76% energy efficiency



On-Site PV Potential

Roof

Coverage

PV Panel

Area in m2

Energy Generated kWh/m2

of buildin area100% 720 141

80% 576 113

75% 540 106

60% 432 85

50% 360 71



Building Massing Analysis Design OptionsOption1

Option 2

Option 4

Option 5



Building Massing Analysis Annual Cooling Loads



Building Massing Analysis Annual Energy Use and SavingsEnergy Savings (kWh) with and without Daylighting

Controls

Compared to the Worst Performer

8434

9187

5432

7549

3722

4470

0

3594

0 2000 4000 6000 8000 10000

1

2

4

5

Options

W/daylighting W/o daylighting



Scale Model Images



Building Exterior Views



Progress Images

Courtesy CEPT Universityand London Infotech



Daylighting Parameters Direct Solar RadiationCloudyJune Sep

li h i



Daylighting Parameters Sunpath Diagram with Shading Mask

Sunpath

Buildings

Trees

Reference point:

North wall at

+3930 (sill of 1st

floor)

S i l i



Optimize shading elements

Minimize summer heatgain

Minimize direct sunglare

Use optimized shading

elements for luminanceanalysis

Sun Penetration AnalysisObjectives

South

clerestory

Southtransom

Basementmonitor

S C l A l i



Sun Control Analysis Sample Chart

S C l A l i



Base Case Time 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21Jan 3 12.2 30.7 39.6 44.1 46.2 46.9 46.2 44.1 39.6 30.7 12.2Feb 4 29.5 45.3 51.3 54.1 55.4 55.8 55.4 54.1 51.3 45.3 29.5

Mar 5 65.4 66.2 66.4 66.5 66.6 66.6 66.6 66.5 66.4 66.2 65.4Apr 6 -23.0 -74.6 89.3 83.2 80.3 79.0 78.6 79.0 80.3 83.2 89.3 -74.6 -23.0

May 7 -23.0 -58.2 -76.7 -85.6 89.9 87.8 87.1 87.8 89.9 -85.6 -76.7 -58.2 -23.0

Jun 8 -23.0 -53.8 -72.1 -81.5 -86.4 88.8 89.6 88.8 -86.4 -81.5 -72.1 -53.8 -23.0

Jul 9 -23.0 -57.8 -76.3 -85.2 89.7 88.1 87.4 88.1 89.7 -85.2 -76.3 -57.8 -23.0Aug # -23.0 -74.2 89.6 83.4 80.5 79.2 78.8 79.2 80.5 83.4 89.6 -74.2 -23.0

Sep # 66.2 66.6 66.7 66.8 66.8 66.8 66.8 66.8 66.7 66.6 66.2

Oct # 28.2 44.4 50.6 53.5 54.8 55.2 54.8 53.5 50.6 44.4 28.2

Nov # 11.8 30.3 39.2 43.7 45.9 46.6 45.9 43.7 39.2 30.3 11.8

Dec # 7.8 26.1 35.5 40.4 42.8 43.6 42.8 40.4 35.5 26.1 7.8

#

Time 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Jan 3 12.2 30.7 39.6 44.1 46.2 46.9 46.2 44.1 39.6 30.7 12.2

Feb 4 29.5 45.3 51.3 54.1 55.4 55.8 55.4 54.1 51.3 45.3 29.5

Mar 5 65.4 66.2 66.4 66.5 66.6 66.6 66.6 66.5 66.4 66.2 65.4Apr 6 -23.0 -74.6 89.3 83.2 80.3 79.0 78.6 79.0 80.3 83.2 89.3 -74.6 -23.0

May7 -23.0 -58.2 -76.7 -85.6 89.9 87.8 87.1 87.8 89.9 -85.6 -76.7 -58.2 -23.0

Jun 8 -23.0 -53.8 -72.1 -81.5 -86.4 88.8 89.6 88.8 -86.4 -81.5 -72.1 -53.8 -23.0

Jul 9 -23.0 -57.8 -76.3 -85.2 89.7 88.1 87.4 88.1 89.7 -85.2 -76.3 -57.8 -23.0Aug # -23.0 -74.2 89.6 83.4 80.5 79.2 78.8 79.2 80.5 83.4 89.6 -74.2 -23.0

Sep # 66.2 66.6 66.7 66.8 66.8 66.8 66.8 66.8 66.7 66.6 66.2

Oct # 28.2 44.4 50.6 53.5 54.8 55.2 54.8 53.5 50.6 44.4 28.2

Nov # 11.8 30.3 39.2 43.7 45.9 46.6 45.9 43.7 39.2 30.3 11.8

Dec # 7.8 26.1 35.5 40.4 42.8 43.6 42.8 40.4 35.5 26.1 7.8

#

Time 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Jan 3 12.2 30.7 39.6 44.1 46.2 46.9 46.2 44.1 39.6 30.7 12.2

Feb 4 29.5 45.3 51.3 54.1 55.4 55.8 55.4 54.1 51.3 45.3 29.5

Mar 5 65.4 66.2 66.4 66.5 66.6 66.6 66.6 66.5 66.4 66.2 65.4Apr 6 -23.0 -74.6 89.3 83.2 80.3 79.0 78.6 79.0 80.3 83.2 89.3 -74.6 -23.0

May 7 -23.0 -58.2 -76.7 -85.6 89.9 87.8 87.1 87.8 89.9 -85.6 -76.7 -58.2 -23.0

Jun 8 -23.0 -53.8 -72.1 -81.5 -86.4 88.8 89.6 88.8 -86.4 -81.5 -72.1 -53.8 -23.0

Jul 9 -23.0 -57.8 -76.3 -85.2 89.7 88.1 87.4 88.1 89.7 -85.2 -76.3 -57.8 -23.0Aug # -23.0 -74.2 89.6 83.4 80.5 79.2 78.8 79.2 80.5 83.4 89.6 -74.2 -23.0

Sep # 66.2 66.6 66.7 66.8 66.8 66.8 66.8 66.8 66.7 66.6 66.2

Oct # 28.2 44.4 50.6 53.5 54.8 55.2 54.8 53.5 50.6 44.4 28.2

Nov # 11.8 30.3 39.2 43.7 45.9 46.6 45.9 43.7 39.2 30.3 11.8Dec # 7.8 26.1 35.5 40.4 42.8 43.6 42.8 40.4 35.5 26.1 7.8

#

Option 1

1-6

light shelf

Option 22-6

light shelf

Shaded

by fins /

trees

Sun Control Analysis South Facing Clerestory

S C l A l i



Sun Control AnalysisSouth Facing Transom

Time 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Jan 3 9.6 28.0 37.2 41.9 44.3 45.0 44.3 41.9 37.2 28.0 9.6

Feb 4 21.2 39.0 46.4 49.9 51.6 52.1 51.6 49.9 46.4 39.0 21.2

Mar 5 49.0 57.4 60.2 61.5 62.0 62.2 62.0 61.5 60.2 57.4 49.0Apr 6 -23.0 85.9 81.8 77.6 75.7 74.8 74.5 74.8 75.7 77.6 81.8 85.9 -23.0

May 7 -23.0 -62.4 -80.7 88.9 87.0 85.1 84.5 85.1 87.0 88.9 -80.7 -62.4 -23.0

Jun 8 -23.0 -54.4 -72.7 -82.0 -86.9 89.3 90.0 89.3 -86.9 -82.0 -72.7 -54.4 -23.0

Jul 9 -23.0 -55.3 -73.7 -83.0 -87.7 89.9 89.2 89.9 -87.7 -83.0 -73.7 -55.3 -23.0Aug # -23.0 -66.3 -84.2 88.2 84.6 82.9 82.4 82.9 84.6 88.2 -84.2 -66.3 -23.0

Sep # -23.0 82.9 75.4 73.0 71.9 71.4 71.2 71.4 71.9 73.0 75.4 82.9 -23.0

Oct # 39.3 51.8 56.1 58.1 59.0 59.3 59.0 58.1 56.1 51.8 39.3

Nov # 15.7 34.1 42.4 46.5 48.5 49.1 48.5 46.5 42.4 34.1 15.7

Dec # 8.3 26.6 36.0 40.8 43.2 44.0 43.2 40.8 36.0 26.6 8.3

#

Sun penetration atequipment lab

Sun penetrationat circulation

Time 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Jan 3 9.6 28.0 37.2 41.9 44.3 45.0 44.3 41.9 37.2 28.0 9.6

Feb 4 21.2 39.0 46.4 49.9 51.6 52.1 51.6 49.9 46.4 39.0 21.2

Mar 5 49.0 57.4 60.2 61.5 62.0 62.2 62.0 61.5 60.2 57.4 49.0Apr 6 -23.0 85.9 81.8 77.6 75.7 74.8 74.5 74.8 75.7 77.6 81.8 85.9 -23.0

May 7 -23.0 -62.4 -80.7 88.9 87.0 85.1 84.5 85.1 87.0 88.9 -80.7 -62.4 -23.0Jun 8 -23.0 -54.4 -72.7 -82.0 -86.9 89.3 90.0 89.3 -86.9 -82.0 -72.7 -54.4 -23.0

Jul 9 -23.0 -55.3 -73.7 -83.0 -87.7 89.9 89.2 89.9 -87.7 -83.0 -73.7 -55.3 -23.0Aug # -23.0 -66.3 -84.2 88.2 84.6 82.9 82.4 82.9 84.6 88.2 -84.2 -66.3 -23.0

Sep # -23.0 82.9 75.4 73.0 71.9 71.4 71.2 71.4 71.9 73.0 75.4 82.9 -23.0

Oct # 39.3 51.8 56.1 58.1 59.0 59.3 59.0 58.1 56.1 51.8 39.3

Nov # 15.7 34.1 42.4 46.5 48.5 49.1 48.5 46.5 42.4 34.1 15.7

Dec # 8.3 26.6 36.0 40.8 43.2 44.0 43.2 40.8 36.0 26.6 8.3

#

Time 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Jan 3 9.6 28.0 37.2 41.9 44.3 45.0 44.3 41.9 37.2 28.0 9.6

Feb 4 21.2 39.0 46.4 49.9 51.6 52.1 51.6 49.9 46.4 39.0 21.2

Mar 5 49.0 57.4 60.2 61.5 62.0 62.2 62.0 61.5 60.2 57.4 49.0Apr 6 -23.0 85.9 81.8 77.6 75.7 74.8 74.5 74.8 75.7 77.6 81.8 85.9 -23.0

May 7 -23.0 -62.4 -80.7 88.9 87.0 85.1 84.5 85.1 87.0 88.9 -80.7 -62.4 -23.0

Jun 8 -23.0 -54.4 -72.7 -82.0 -86.9 89.3 90.0 89.3 -86.9 -82.0 -72.7 -54.4 -23.0

Jul 9 -23.0 -55.3 -73.7 -83.0 -87.7 89.9 89.2 89.9 -87.7 -83.0 -73.7 -55.3 -23.0Aug # -23.0 -66.3 -84.2 88.2 84.6 82.9 82.4 82.9 84.6 88.2 -84.2 -66.3 -23.0

Sep # -23.0 82.9 75.4 73.0 71.9 71.4 71.2 71.4 71.9 73.0 75.4 82.9 -23.0

Oct # 39.3 51.8 56.1 58.1 59.0 59.3 59.0 58.1 56.1 51.8 39.3

Nov # 15.7 34.1 42.4 46.5 48.5 49.1 48.5 46.5 42.4 34.1 15.7Dec # 8.3 26.6 36.0 40.8 43.2 44.0 43.2 40.8 36.0 26.6 8.3

#

Sun penetrationat office desk

May be

shadedby trees

Di t S A



P R O F I L E A N G L E T A B L E

Time 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Jan 3 10.6 29.1 38.2 42.8 45.1 45.7 45.1 42.8 38.2 29.1 10.6

Feb 4 24.6 41.7 48.5 51.7 53.3 53.7 53.3 51.7 48.5 41.7 24.6

n Mar 5 56.2 61.4 63.0 63.7 64.1 64.2 64.1 63.7 63.0 61.4 56.2n Apr 6 -23.0 -80.4 85.3 80.2 77.8 76.7 76.4 76.7 77.8 80.2 85.3 -80.4-23.0

n May 7 -23.0 -60.3 -78.8 -87.3 88.5 86.4 85.8 86.4 88.5 -87.3 -78.8 -60.3 -23.0

n Jun 8 -23.0 -54.0 -72.2 -81.6 -86.5 89.0 89.7 89.0 -86.5 -81.6 -72.2 -54.0 -23.0

n Jul 9 -23.0 -56.3 -74.7 -83.9 88.5 89.2 88.5 89.2 88.5 -83.9 -74.7 -56.3 -23.0n Aug # -23.0 -69.5 86.9 86.1 82.8 81.3 80.8 81.3 82.8 86.1 86.9 -69.5-23.0

n Sep # 23.0 75.5 71.4 70.1 69.6 69.3 69.2 69.3 69.6 70.1 71.4 75.5 23.0

n Oct # 33.8 48.3 53.5 55.9 57.1 57.4 57.1 55.9 53.5 48.3 33.8

Nov # 13.7 32.2 40.8 45.2 47.2 47.9 47.2 45.2 40.8 32.2 13.7

Dec # 8.0 26.2 35.6 40.5 42.9 43.7 42.9 40.5 35.6 26.2 8.0

#

South facing wall

Direct Sun Access40

Minimum, 80

Maximum

D li hti S h



Daylighting Schemes OptionsIncreasedclerestory

Reducedvision window

With and withoutglass blocks

Reduced Northglazing

Increasedmonitor

Reduced East /West glazing

P li i Fl l A l i



Excellent daylightcoverage

Adjacent buildingsand trees will impactdaylighting

Preliminary Floorplan Analysis

Inadequate

Adequate

D li hti A l i


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Daylighting Analysis Luminance Views Under Clear Sky

Lab

(East view)

Lab(East view)

Courtesy: Clanton & Associates

D li hti A l i


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Daylighting Analysis Luminance Views Under Clear SkyWith 2.8m wide

vision windows

With 1.4m wide

vision windows

Lab

(East view)

Lab(East view)

Ill i f I Fl


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Illuminance of I Floor Clear Sky

With 2.8m wide vision windows

With 1.4m wide vision windows

Reduced

width helps

reduce high

contrast/glare

near windows

Reduced width also

reduces some daylight

throughout the space

Lab

Equipment lab

Lab

Equipment lab

Insufficient daylight

N


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Luminance Views


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Luminance Views Clear skyWith glasspartition wall

With opaquepartition wall

Lab(East view)

Lab(East view)

Split the partition wall as:Top: OpaqueMiddle: TransparentBottom: Opaque

O

T

O

Illuminance of Floor Plan


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With 67% VT on East & West

With 33% VT on East & WestReduced VT helps reduce highcontrast/glare near windows

N

OfficeConference Seminar

Room

Office Conference SeminarRoom

Illuminance of Floor PlanClear sky

Courtyard Courtyard

Courtyard Courtyard

Luminance Views


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With transparentglass-blocks

Withoutglass-blocks

Glass-blockshelp

wash theside walls

Seminar Room

(South view)

Corridor

(East view)

Seminar Room(South view)

Corridor(East view)

Luminance Views Clear sky

Luminance Views


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With clerestory

Withoutclerestory

Sim Lab(East view)

Sim Lab(East view)

Clerestoryhelps washthe wall

Luminance Views Clear sky

Lighting Design


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Lighting Design Section with luminaire distribution

Building wide LPD at 6W/sq.m

50% below ASHRAE

Courtesy: Clanton & Associates

Energy Conservation Results


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Energy Conservation Results EUI Progression

0

50

100

150

200

250

Predesign

Baseline

Predesign

Technical

Potential

PreDesign

Goal

Massing

stage

HVAC

stage

Optimized

Bundle

1

Optimized

Bundle

2

Optimized

Bundle

3

Optimized

3A

Optimized

3B

Optimized

3C

Optimized

3D

kWh/m2

Cool Fan/Pump Lights Equipment

Energy Conservation Results


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Energy Conservation Results PV Requirement Progression

20

40

60

80

100

120

140

Predesign

Baseline

Predesign

TechnicalPotential

PreDesign

Goal

Massing

stage

HVAC

stage

Optimized

Bundle1

Optimized

Bundle2

Optimized

Bundle3

Optimized

3A

Optimized

3B

Optimized

3C

Optimized

3D

PVAream2

PVCapacity

Payback Calculations


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Payback Calculations With Integrated Costs

Daylighting Renderings


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With proposed light colored furniture

Courtesy CEPT University

http://110627%20second%20floor.swf/http://110627%20second%20floor.swf/http://110627%20second%20floor.swf/


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Renderings
http://110627%20firstfloor.swf/http://110627%20firstfloor.swf/


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Renderings


Thank You


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Thank You

TheThe WeidtWeidt GroupGroupThe Company for Energy Decision MakersThe Company for Energy Decision Makers

twgi.comtwgi.com

David A. Eijadi, FAIA, LEED AP, BD+CDavid A. Eijadi, FAIA, LEED AP, BD+C

[email protected]@twgi.com

Vinay Ghatti, LEED AP, BD+CVinay Ghatti, LEED AP, BD+C

[email protected]@twgi.com

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