PERFORMANCE BASED OPTIMISATION OF FACADE FOR SOLAR GAIN, DAYLIGHT, GLARE & VIEW ITC MIXED USE DEVELOPMENT KOLKATA
MINIMISE SOLAR GAIN
OPTIMISE DAYLIGHT
MINIMISE GLARE
MAINTAIN VIEW FROM EVERY POINT
CONTENT PROJECT OVERVIEW
CLIMATIC DATA
DESIGN ANALYSIS
PARAMETRIC SETUP
OPTIMISATION
RESULT
PROJECT OVERVIEW ITC MIXED USE DEVELOPMENT KOLKATA
Performance Based Optimisation of Facade | Project Overview
Site Plan
IT Tower
N
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Project Overview
ITC Mixed Use Development, Kolkata
Floor Plan
N
Infrequently Occupied Area
Performance Based Optimisation of Facade | Project Overview
ITC Mixed Use Development, Kolkata
Floors for Simulation
13th Floor (Highest Common Floor)
3rd Floor (Floor with least daylighting)
Performance Based Optimisation of Facade | Project Overview
ITC Mixed Use Development, Kolkata
Optimised Facade- Examples
Institute | Adelaide
Mixed Use | Taijan
Office | Seoul
Housing | Chicago
Performance Based Optimisation of Facade | Project Overview
ITC Mixed Use Development, Kolkata
Optimised Facade- Examples
Institute | Adelaide
Mixed Use | Taijan
Office | Seoul
Housing | Chicago
Performance Based Optimisation of Facade | Project Overview
ITC Mixed Use Development, Kolkata
Aesthetics
Victorian | Late Modernism
Modernism
Parametricism
Iterations
Performance
Optimised Solution
Performance mance Based Optimisation of Facade | Project Overview
140+
Serving clients in more than 140 countries
ITC Mixed Use Development, K Kolkata
740+ 45K+ $8.2bn Over 740 offices around the world
45,000 dedicated Professionals globally
$8.2 billion in revenue as of March 2013
CLIMATIC DATA ITC MIXED USE DEVELOPMENT KOLKATA
Performance Based Optimisation of Facade | Climatic Data
ITC Mixed Use Development, Kolkata
Sun Path
Temperature
Equinox Path (Mar 21) Solstice Path (June 21) Solstice Path (Dec 21) N
Performance Based Optimisation of Facade | Climatic Data
ITC Mixed Use Development, Kolkata
Daylight
Climate Type : Warm & Humid Summer : Mar to Jun DBBT : 22-36 Deg C RH : 50-95 % Monsoon: Jul to Oct DBT : 26-33 Deg C RH : 70-98 % Winters : Nov to Feb DBT : 11-26 Deg C RH : 40-90 % Ambient outdoor conditions provide thermal comfort for only 13% of Occupied Period Solar Shading will help in more than 58% of Occupied Period Mechanical Cooling Required for 70% of the Occupied Period
Performance Based Optimisation of Facade | Climatic Data
ITC Mixed Use Development, Kolkata
DESIGN ANALYSIS ITC MIXED USE DEVELOPMENT KOLKATA
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Incident Solar Radiation
W Perspective
N Perspective
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Incident Solar Radiation
3rd Floor
13th Floor
Space without Opening Blank Facade
W Axonometric
W Axonometric
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Daylight- 3rd Floor Areas above 1000 lux level are highly susceptible to glare.
VLT U factor SC
0.50 1.68 0.49
53 % Area within acceptable lux range of 110-1100
Daylight Level Sep 21 | 1200 hrs N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Daylight- 13th Floor Areas above 1000 lux level are highly susceptible to glare.
VLT U factor SC
0.50 1.68 0.49
47 % Area within acceptable lux range of 110-1100
Daylight Level Sep 21 | 1200 hrs N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Glare- 13th Floor View 1 Sep 21 | 1200 hrs
View 2 Sep 21 | 1200 hrs Areas above 1000 lux level are highly susceptible to glare.
V2
V1 N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Glare- 13th Floor View 1 Dec 21 | 1600 hrs
View 2 Dec 21 | 1000 hrs Areas above 1000 lux level are highly susceptible to glare.
V2
V1 N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Shading Analysis- Horizontal Shade | NE Facade It is observed that, the shade does not work suitably.
100
Shading Percentage
80
70 (Min Req) 60
40 Key Plan
20
40 Deg Shade 00 Deg Shade
0 N
J
F
M
A
M
J
J
Months
A
S
O
N
D
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Shading Analysis- Vertical Shade | NE Facade It is observed that, the shade works suitably throughout the year.
100
Shading Percentage
80
70 (Min Req) 60
40 Key Plan
20
30 Deg Shade 00 Deg Shade
0 N
J
F
M
A
M
J
J
Months
A
S
O
N
D
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Shading Analysis- Horizontal Shade | NE Facade It is observed that, the shade works suitably only for three months.
100
Shading Percentage
80
70 (Min Req) 60
40 Key Plan
20
40 Deg Shade 00 Deg Shade
0 N
J
F
M
A
M
J
J
Months
A
S
O
N
D
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Shading Analysis- Vertical Shade | SW Facade It is observed that, the shade works suitably most part of the year.
100
Shading Percentage
80
70 (Min Req) 60
40 Key Plan
20
30 Deg Shade 00 Deg Shade
0 N
J
F
M
A
M
J
J
Months
A
S
O
N
D
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
PARAMETRIC SETUP ITC MIXED USE DEVELOPMENT KOLKATA
Performance Based Optimisation of Facade | Parametric Setup
ITC Mixed Use Development, Kolkata
Hybrid Fin Concept The solar analysis studies showed that horizontal shade is required for the summer months and vertical shades are required for the winter months. A combination of the two maked the facade look like a series of grillage (as shown in the images on the right). So, instead of a direct super-imposition of the horizontal and vertical shades, a hybrid fin is conceptualised which is derived by interpolating the intersections of the shades. The hybrid fin also acts a contemporary expression, which makes the facade look fluid and dynamic (as shown later). The hybrid fins are optimised with the material properties of solid aluminium.
+
=
X
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Shading Analysis- Hybrid Fin | NE Facade It is observed that, the shade works suitably throughout the year.
100
Shading Percentage
80
70 (Min Req) 60
40 Key Plan
20
Avg Shade Shading Distribution
0 N
J
F
M
A
M
J
J
Months
A
S
O
N
D
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Shading Analysis- Hybrid Fin | SW Facade It is observed that, the shade works suitably throughout the year.
100
Shading Percentage
80
70 (Min Req) 60
40 Key Plan
20
Avg Shade Shading Distribution
0 N
J
F
M
A
M
J
J
Months
A
S
O
N
D
Performance Based Optimisation of Facade | Parametric Setup
ITC Mixed Use Development, Kolkata
Hybrid Fin Geometry Each fin is a floor high (4000mm). The fin pinches at the botton to make room for a clear view outside.
p
w
Standing Human Eye Level Sitting Human Eye Level
x
y w p x y
width projection fold-x (fraction of w) fold-y
Performance Based Optimisation of Facade | Parametric Setup
ITC Mixed Use Development, Kolkata
Fin Width
p
w
x 0.75
0.90
1.02
1.16
1.30
1.45
1.58
1.72
1.86
2.00
y
Performance Based Optimisation of Facade | Parametric Setup
ITC Mixed Use Development, Kolkata
Fin Projection
p
w
x 0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
y
Performance Based Optimisation of Facade | Parametric Setup
ITC Mixed Use Development, Kolkata
Fin Fold- x
p
w
x 0.33
0.40
0.48
0.55
0.62
0.70
0.77
0.85
0.92
1.00
y
Performance Based Optimisation of Facade | Parametric Setup
ITC Mixed Use Development, Kolkata
Fin Fold- y
p
w
x 2.10
2.23
2.36
2.50
2.63
2.76
2.90
3.03
3.16
3.30
y
Performance Based Optimisation of Facade | Parametric Setup
ITC Mixed Use Development, Kolkata
Transition
13th Floor
Transition
3rd Floor
FOLD- Y
FOLD- X
PROJECTION
ITC Mixed Use Development, Kolkata
WIDTH
Performance Based Optimisation of Facade | Parametric Setup
125 x 90 x 120 x 77 79,00,000 POSSIBILITIES
Performance Based Optimisation of Facade | Parametric Setup
ITC Mixed Use Development, Kolkata
OPTIMISATION ITC MIXED USE DEVELOPMENT KOLKATA
Performance Based Optimisation of Facade | Optimisation
ITC Mixed Use Development, Kolkata
Workflow
Export
Rhino
Rhino
Grasshopper
Existing Geometry
Setup Parameters
Geco
Ecotect Translator
Revit
Optimised Geometry
Galapagos
3DS Max
Genetic Algorithm
AutoCAD
Ecotect Analysis
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Candidate Solution Performance
1200
Optimised Solution Candidate Solution
Existing Design (Benchmark)
600
100
Solar Gain
90
80
70
60
300
50
Daylight Level
900
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Generation 1 | 3 Random Solutions
Benchmark Existing Design Solar Gain 100% Daylight Lvl 49%
13th Floor
3rd Floor
Random Solution 1 Solar Gain 97% Daylight Lvl 50%
Random Solution 2 Solar Gain 93% Daylight Lvl 51%
Random Solution 3 Solar Gain 43% Daylight Lvl 83%
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Generation 100 | 3 Random Solutions
Benchmark Existing Design Solar Gain 100% Daylight Lvl 49%
13th Floor
3rd Floor
Random Solution 1 Solar Gain 68% Daylight Lvl 83%
Random Solution 2 Solar Gain 55% Daylight Lvl 94%
Random Solution 3 Solar Gain 63% Daylight Lvl 85%
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
RESULT ITC MIXED USE DEVELOPMENT KOLKATA
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Selected Optimised Solutions
Benchmark Existing Design Solar Gain 100% Daylight Lvl 49%
13th Floor
3rd Floor
Optimised Solution 1 Solar Gain 62% Daylight Lvl 88%
Optimised Solution 2 Solar Gain 61% Daylight Lvl 87%
Optimised Solution 3 Solar Gain 64% Daylight Lvl 88%
Performance Based Optimisation of Facade | Result
Optimised Solution 1 Solar Gain Daylight lvl Fin width (mm)
62 % 88 % 1200
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Daylight- 3rd Floor Areas above 1000 lux level are highly susceptible to glare.
VLT U factor SC
0.50 1.68 0.49
89 % Area within acceptable lux range of 110-1100
Daylight Level Sep 21 | 1200 hrs N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Daylight- 13th Floor Areas above 1000 lux level are highly susceptible to glare.
VLT U factor SC
0.50 1.68 0.49
87 % Area within acceptable lux range of 110-1100
Daylight Level Sep 21 | 1200 hrs N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Result
Optimised Solution 2 Solar Gain Daylight lvl Fin width (mm)
61 % 87 % 900
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Daylight- 3rd Floor Areas above 1000 lux level are highly susceptible to glare.
VLT U factor SC
0.50 1.68 0.49
87 % Area within acceptable lux range of 110-1100
Daylight Level Sep 21 | 1200 hrs N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Daylight- 13th Floor Areas above 1000 lux level are highly susceptible to glare.
VLT U factor SC
0.50 1.68 0.49
87 % Area within acceptable lux range of 110-1100
Daylight Level Sep 21 | 1200 hrs N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Result
Optimised Solution 3 Solar Gain Daylight lvl Fin width (mm)
64 % 88 % 1800
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Daylight- 3rd Floor Areas above 1000 lux level are highly susceptible to glare.
VLT U factor SC
0.50 1.68 0.49
86 % Area within acceptable lux range of 110-1100
Daylight Level Sep 21 | 1200 hrs N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Daylight- 13th Floor Areas above 1000 lux level are highly susceptible to glare.
VLT U factor SC
0.50 1.68 0.49
90 % Area within acceptable lux range of 110-1100
Daylight Level Sep 21 | 1200 hrs N
Key Plan
Performance Based Optimisation of Facade | Design Analysis
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
Summary
1200
Optimised Solution Candidate Solution Existing Design 100% | 49%
900
Optimised Solution 2 61% | 87% Optimised Solution 3 64% | 88%
600
100
Solar Gain
90
80
70
60
300
50
Daylight Level
Optimised Solution 1 62% | 88%
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
Glare- 13th Floor | Solution 2 View 1 Sep 21 | 1200 hrs
View 2 Sep 21 | 1200 hrs Areas above 1000 lux level are highly susceptible to glare.
V2
V1 N
Key Plan
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
Glare- 13th Floor | Solution 2 View 1 Dec 21 | 1600 hrs
View 2 Dec 21 | 1000 hrs Areas above 1000 lux level are highly susceptible to glare.
V2
V1 N
Key Plan
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
Glare- 13th Floor | Solution 2 View 1 Dec 21 | 1600 hrs
View 2 Dec 21 | 1000 hrs Areas above 1000 lux level are highly susceptible to glare.
V2
V1 N
Key Plan
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
Performance Based Optimisation of Facade | Result
ITC Mixed Use Development, Kolkata
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