Cept Nze Arch2030 v3
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Transcript of 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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2 PrivilegedandConfidential TheWeidt Group 2012
Tour of Ahmedabad City of Vibrant Culture & Architecture
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3 PrivilegedandConfidential TheWeidt Group 2012
Site Conditions
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4 PrivilegedandConfidential TheWeidt Group 2012
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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5 PrivilegedandConfidential TheWeidt Group 2012
Pre-Design Analysis
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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
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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
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Building Massing Analysis Design OptionsOption1
Option 2
Option 4
Option 5
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Building Massing Analysis Annual Cooling Loads
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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
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Scale Model Images
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Building Exterior Views
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Progress Images
Courtesy CEPT Universityand London Infotech
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Daylighting Parameters Direct Solar RadiationCloudyJune Sep
li h i
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Daylighting Parameters Sunpath Diagram with Shading Mask
Sunpath
Buildings
Trees
Reference point:
North wall at
+3930 (sill of 1st
floor)
S i l i
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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
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Sun Control Analysis Sample Chart
S C l A l i
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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
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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
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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
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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
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Daylighting Schemes OptionsIncreasedclerestory
Reducedvision window
With and withoutglass blocks
Reduced Northglazing
Increasedmonitor
Reduced East /West glazing
P li i Fl l A l i
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Excellent daylightcoverage
Adjacent buildingsand trees will impactdaylighting
Preliminary Floorplan Analysis
Inadequate
Adequate
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Daylighting Analysis Luminance Views Under Clear Sky
Lab
(East view)
Lab(East view)
Courtesy: Clanton & Associates
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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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Daylighting Renderings
With proposed light colored furniture
Courtesy CEPT University
Daylighting Renderings
http://110627%20second%20floor.swf/http://110627%20second%20floor.swf/http://110627%20second%20floor.swf/ -
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Daylighting Renderings
Courtesy CEPT University
Renderings
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Renderings
Courtesy CEPT University
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