Daylight in Buildings in OneCube - LEED

Project – One Qube, Sector 18, Gurugram, Haryana

DAYLIGHT ANALYSIS REPORT

IEQ Credit 5 - Daylighting

KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

Contents 1.

2.

INTRODUCTION ............................................................................................................................................... 4 1.1

OBJECTIVE ............................................................................................................................................... 4

1.2

CONTEXT ................................................................................................................................................. 4

1.3

NARRATIVE .............................................................................................................................................. 4

1.4

METHODOLOGY ...................................................................................................................................... 4

1.5

ATTACHMENTS ........................................................................................................................................ 7

DAYLIGHT SIMULATION REPORT..................................................................................................................... 8 2.1 WINDOW WALL RATIO .................................................................................................................................. 8 2.2 SOLAR PATH ANALYSIS ................................................................................................................................ 10 2.3 DAYLIGHT COMPLIANCE AREA .................................................................................................................... 12

MATERIAL SPECIFICATION .................................................................................................................................... 13 3.1 GLASS .......................................................................................................................................................... 13 3.2 GLARE CONTROL ......................................................................................................................................... 13 3.

SIMULATION INPUT....................................................................................................................................... 14 4.1 SOLAR HEAT GAIN COEFFICIENT ................................................................................................................. 14 4.2 VISUAL LIGHT TRANSMITTANCE ................................................................................................................. 14 4.3 CONDUCTANCE ........................................................................................................................................... 14 4.4 REFLECTIVITY ............................................................................................................................................... 14

4.

VIEWS ............................................................................................................................................................ 16

5.

CONCLUSION ................................................................................................................................................. 17

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

Table to Figures Figure 1: Solar Path at 21st September for 09:00 am. .......................................................................................... 10 Figure 2: Solar Path at 21st September for 03:00 pm.......................................................................................... 11 Figure 3: Shadow Range 21st September 09:00 am to 03:00 pm ........................................................................ 11 Figure 4: Sample photographs of the blinders...................................................................................................... 13 Figure 5: Snapshot for glass property input for double glazed windows. ............................................................ 14 Figure 6: Snapshot of radiance analysis showing the sky condition as uniform sky. ........................................... 15 Figure 7: Snapshot of radiance simulation ........................................................................................................... 15 Figure 8: Rendered view 1 .................................................................................................................................... 16 Figure 9: Rendered View 2 .................................................................................................................................... 16

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

1.

INTRODUCTION

The project, One Qube, is an office building (G+11) located in Plot No. 20, Sector 18, Gurugram, Haryana. The project is aiming to achieve LEED rating as per v.4.1 of Building Design + Construction (BD+C).

OBJECTIVE

1.1 •

•

1.2

To provide the building occupants a connection between indoor spaces and outdoor spaces through the introduction of daylight and views into the regularly occupied areas of the building.

To analyze the illuminance level from the as built Daylight model of the building.

CONTEXT

Sufficient day light and outside views are necessary to utilize a space productively and feel connected with outside environment respectively. Besides providing significant savings in lighting energy consumption, it positively affects the work efficiency and health. Keeping outside views and daylighting requirements of individual room spaces in consideration, window sizes are designed. Overall window schedule is planned with holistic vision of providing outside views and day lighting.

1.3

NARRATIVE

Building design plays a very important role in its expression with respect to climate and human comfort. The Project owner has developed and the architect has designed the project’s master plan and individual building block design in an energy efficient way. Please follow the attached reports to understand the overall project performance with respect to the window to wall ratios (WWRs), the day lighting and solar path / shading analysis.

1.4

METHODOLOGY

Methodology followed in the day light simulation criteria is as followed: Simulation- Simulation is done on Radiance. The detailed methodology adopted to show the compliance as per simulation results is attached below:

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

Methodology

OPTION 2 - SIMULATION Identification of Regularly occupied areas

Calculate the regularly occupied areas.

Create a daylight Simulation Model

Add Glazing properties and reflectivity for interior finishes

Add a horizontal Grid at work height plane (30 inches)

Entre daylight criterion in Radiance

Simulate using radiance

Formulate the results in tabular form

Cross verify it with the actual radiance produced results

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

OPTION 3 - Simulation 1- First step was to Identify all the regularly occupied areas- Identify all the regularly occupied areas in the building, which means, areas in the building where one or more individuals normally spends time (more than 1 hour per person per day on average) seated or standing as they work, study or perform other focused activities inside the building. The one hour time frame is continuous and should be based on the time a typical occupant uses the space. For the spaces that are not used daily, the one hour time frame should be based on the time a typical occupant spends in the space when it is in use.

2- Calculate the regularly occupied areas- After the identification of all regularly occupied areas, calculation of their associated space areas was done.

3- Create a day light simulation model- A daylight model of the building was created on Autodesk Ecotect Analysis, 2011.

4- Adding Properties- The glazing properties like Solar Heat Gain Coefficient (SHGC),Visual Light Transmittance (VLT), u-value for all the windows and surface reflectance settings for interior finishes, were added. The daylight model of the building was modeled considering the following values for different parameters as mentioned below: Table1: Glass properties Of Windows Solar Heat Gain Coefficient (SHGC) 0.23 Visual Light Transmittance (VLT) 0.41 Sky Condition Clear Sky U Value (w/m2k) 1.6 5- Adding the Horizontal Grid: After adding all the glazing properties to windows, for each applicable area, a horizontal calculation grid of 1.6 foot and 3.2 foot (500mm and 1000mm) at 800 mm (work height plane) above the floor was included. According to LEED, the calculation grid should be set at a minimum of 5 foot interval to provide a detailed illumination diagram for each area.

6- Entering the Day-light criterion in the model- Day light illumination for each applicable space is calculated using following day light criterion- clear sky condition at both 9:00 a.m. and 03:00 p.m. on the equinox (March 21 or September 21) for the projects geographic location.

7- Simulation using Radiance Beta 2.0- After the daylight model is completed; simulation was done using radiance plugin by uploading a weather file of project’s geographic location i.e.

New Delhi, India.

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

8- Formulation of the results- After the simulations were done on radiance, the results obtained are formulated in a tabular form by calculating the percentage of daylight area (range: 3003000 lux) of the building. Since, the percentage achieved is 77.9% at 9:00 a.m. and 84.3% at 03:00 p.m., which is more than 75 % (minimum % by LEED v.4.1), hence, the project qualifies for 2 point.

9- Cross verification- After the formulation of the results in tabular form, the data was manually cross verified from simulation results and the data entered in the tabular form.

1.5

ATTACHMENTS 1. Daylight Analysis Report 2. Annexure 1: Simulation Results 3. Annexure 2: Floor Plans and Elevations

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

2.

DAYLIGHT SIMULATION REPORT

2.1 WINDOW WALL RATIO Window Wall Ratio of 39.4% is calculated as per the as-built drawings of plans and elevations. Below is the attached table of calculations for different faces of the building supporting the above mentioned WWR Percentage.

Elevation

Wall Area (m²)

A

390.3

Window Area Floor GF 4th-10th GF

C

1351.2 3rd-11th GF

G

1351.2 3rd-11th GF Podium 3 4th-10th

B

1736.7

11th

GF H

1736.7

Podium 3 4th-10th

Width Height(m) No. (m) Area(m²) 5.8 3.2 2 37.1 7.53 10.1 1 76.1 7.53 2.84 7 149.7 9 3.3 1 29.7 8.5 3.3 1 28.1 9.4 2.85 9 241.1 8.1 2.85 9 207.8 9 3.3 1 29.7 8.5 3.3 1 28.1 9.4 2.85 9 241.1 8.1 2.85 9 207.8 7.5 3.3 1 24.8 6.7 3.3 1 22.1 7.6 3 1 22.8 4.3 3 1 12.9 7.6 2.85 7 151.6 5.8 2.85 7 115.7 15.8 2.7 7 298.6 11.5 2.7 7 217.4 7.6 3 1 22.8 5.8 3 1 17.4 1 12.4 1 17.0 1 15.5 The area of the 1 15.5 window is calculated using 1 17.0 polyline here.

1 13.6 1 12.5 1 14.2 7.5 3.3 1 24.8 6.7 3.3 1 22.1 7.6 3 1 22.8 4.3 3 1 12.9 7.6 2.85 7 151.6 5.8 2.85 7 115.7

WWR

(m²) 262.9

67.4%

506.6

67.4%

506.6

37.5%

1023.8

58.9%

1023.8

58.9%

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

15.8 11.5 7.6 5.8

11th

GF D

3061.5

3rd 4th-11th

D1 D2

29.6 29.6

GF GF GF

I

3061.5

3rd 4th-11th

I1 I2

29.6 29.6

GF GF

E

1234.2

4th-11th

F

1234.2

4th-11th

J K L M N

210 210 210 277 303 16485.9

4th-9th 4th-9th 4th-9th 4th-9th 4th-9th

2.7 2.7 3 3

The area of the window is calculated using polyline here.

16 8.8 42.7 7.2 6.5 3 6.6 6.6 16 8.8 42.7 7.2 6.5 3 6.6 6.6 2.5 4.4 5.71 3 4.3 8 7.6 7.6 7.6 10.02 0

3.1 3.1 2 2 2 2 3.2 3.2 3.1 3.1 2 2 2 2 3.2 3.2 2.06 2.06 2.1 2.06 2 2.1 2.7 2.7 2.7 2.7 0

7 7 1 1 1 1 1 1 1 1 1 1 1 1 1 48 8 8 1 1 1 1 1 48 8 8 1 1 8 8 8 8 8 8 7 7 7 7 0

298.6 217.4 22.8 17.4 12.4 17.0 15.5 15.5 17.0 13.6 12.5 14.2 49.6 27.3 85.4 691.2 104.0 48.0 21.1 21.1 49.6 27.3 85.4 691.2 104.0 48.0 21.1 21.1 41.2 72.5 95.9 49.4 68.8 134.4 143.6 143.6 143.6 189.4 0.0

1005.5

32.8%

21.12 21.12

71.4% 71.4%

1005.5

32.8%

21.12 21.12

71.4% 71.4%

209.64

17.0%

252.64

20.5%

143.6 143.6 143.6 189.4 0 6501.7

68.4% 68.4% 68.4% 68.4% 0 39.4%

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

2.2 SOLAR PATH ANALYSIS Solar Path analysis is done for equinox i.e., September 21 at both 09:00 a.m. and 15:00 p.m. Building is designed in such a way that it prevents excessive ingress of heat besides providing optimum luminance levels.

Figure 1: Solar Path at 21st September for 09:00 am.

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

Figure 2: Solar Path at 21st September for 03:00 pm.

Figure 3: Shadow Range 21st September 09:00 am to 03:00 pm

2.3 DAYLIGHT COMPLIANCE AREA Tool used for modeling: Autodesk Ecotect Analysis, 2011 Engine used for simulation: Radiance Beta 2.0 Link: http://radsite.lbl.gov/radiance/ Table showing the compliance at 09:00 a.m. and 03:00 p.m. is attached below:

S.No . # 1 2

Floor

# Ground Floor

3 4 5 6 7 8

Type of Space

Podium-3 4th 5th, 7th, 8th & 9th 6th & 10th 11th Total

Regularly occupied Area(m²) A 773.4 276

Table: Illuminance Lux Level calculation for LEED 21st SEPTEMBER 9:00 AM 3:00pm Average Percentage Compliant Compliant Compliance Above Net Below Above Net Below Area Area 3000 Compliant 300 3000 Compliant 300 Lux Lux Area Lux Lux Area a1 b1 x=A-a1-b1 a2 b2 y=A-a2-b2 C=(x+y)/2 (C/A)*100 Yes/No 31.54 0 741.86 33.2 0 740.2 741.03 95.81% Yes 0 0 276 0 0 276 276 100.00% Yes

Retail Office Reception Area Office Office

88.6

0

0

88.6

0

0

88.6

88.6

100.00%

Yes

1483.2 3237

982.2 726

0 0

501 2511

875.3 398.6

0 0

607.9 2838.4

554.45 2674.7

37.38% 82.63%

No Yes

Office

12914

2870

0

10044

1560.4

0

11353.6

10698.8

82.85%

Yes

Office Office

5967.6 3178.4 27918.2

1277.8 278.8

0 0

4689.8 2899.6

1212.4 301.7

0 0

4755.2 2876.7

4722.5 2888.15 22644.23

79.14% 90.87%

Yes Yes

81.11%

MATERIAL SPECIFICATION 3.1 GLASS The following glass property was modeled as per the data mentioned in the Design Basis Report: SHGC – 0.23 VLT – 41% U-Value – 1.6 W/m2K

3.2 GLARE CONTROL In order to control the glare, automatic foldable blinders will be used in the building (in the scope of tenant) i.e., on all the floors. Blinders can be folded or opened automatically according to the lux level of light at that moment.

This will be addressed in the builder buyer agreement.

The sample photographs are attached below:

SAMPLE

SAMPLE

Figure 4: Sample photographs of the blinders.

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

3.

SIMULATION INPUT

4.1 SOLAR HEAT GAIN COEFFICIENT SHGC of 0.23 is modeled for double glazed windows.

4.2 VISUAL LIGHT TRANSMITTANCE VLT of 41% is modeled for double glazed windows as mentioned in the Design Basis Report.

4.3 CONDUCTANCE U-Value of 1.6 W/m2K has been used in double glazed window.

4.4 REFLECTIVITY Material used inside is Autoclaved aerated concrete (AAC) which has a grey finish and reflectivity of T: 0.753.

Figure 5: Snapshot for glass property input for double glazed windows.

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

4.5 SKY CONDITION

Figure 6: Snapshot of radiance analysis showing the sky condition as uniform sky.

Figure 7: Snapshot of radiance simulation

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

4.

VIEWS

Figure 8: Rendered view 1

Figure 9: Rendered View 2

One Qube, Sector 18, Gurugram, Haryana KALPAKRIT SUSTAINABLE ENVIRONMENTS PVT. LTD. w w w . k a l p a k r i t . c o m

5.

CONCLUSION

As per the simulation results, the percentage of the regularly occupied spaces achieving the adequate lux level between 300 lux to 3000 lux is 81.11% (more than 75%). Hence, the project is likely to achieve 2 points for the compliance.

Annexure 1: Simualtion Results

Simulation on 21st September at 9:00 a.m.

Simulation Result for lux level below 300

Simulation at 9:00 a.m.

Simulation Result for lux level above 3000

Floor: Ground Space: Retail Area: 773.4 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 31.54 sqm

Percent of complied Area: 95.9%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 9:00 a.m.

Simulation Result for lux level above 3000

Floor: Ground Space: Reception Area: 88.6 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 0 sqm

Percent of complied Area: 100%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 9:00 a.m.

Simulation Result for lux level above 3000

Floor: Ground Space: Office Area: 276 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 0 sqm

Percent of complied Area: 100%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 9:00 a.m.

Simulation Result for lux level above 3000

Floor: Podium-3 Space: Office Area: 1483.2 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 982.2 sqm

Percent of complied Area: 33.8%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 9:00 a.m.

Simulation Result for lux level above 3000

Floor: 4th Space: Office Area: 3237 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 726 sqm

Percent of complied Area: 77.6%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 9:00 a.m.

Simulation Result for lux level above 3000

Floor: 5th (Typical for 7th, 8th, 9th) Space: Office Area: 3228.5 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 717.5 sqm

Percent of complied Area: 77.8%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 9:00 a.m.

Simulation Result for lux level above 3000

Floor: 6th (Typical for 10th) Space: Office Area: 2983.8 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 638.9 sqm

Percent of complied Area: 78.6%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 9:00 a.m.

Simulation Result for lux level above 3000

Floor: 11th Space: Office Area: 3178.4 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 278.8 sqm

Percent of complied Area: 91.2%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation on 21st September at 3:00 p.m.

Simulation Result for lux level below 300

Simulation at 3:00 p.m.

Simulation Result for lux level above 3000

Floor: Ground Space: Retail Area: 773.4 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 33.2 sqm

Percent of complied Area: 95.7%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 3:00 p.m.

Simulation Result for lux level above 3000

Floor: Ground Space: Reception Area: 88.6 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 0 sqm

Percent of complied Area: 100%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 3:00 p.m.

Simulation Result for lux level above 3000

Floor: Ground Space: Office Area: 276 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 0 sqm

Percent of complied Area: 100%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 3:00 p.m.

Simulation Result for lux level above 3000

Floor: Podium-3 Space: Office Area: 1483.2 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 875.3 sqm

Percent of complied Area: 41%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 3:00 p.m.

Simulation Result for lux level above 3000

Floor: 4th Space: Office Area: 3237 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 398.6 sqm

Percent of complied Area: 87.7%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 3:00 p.m.

Simulation Result for lux level above 3000

Floor: 5th (Typical for 7th, 8th, 9th) Space: Office Area: 3228.5 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 390.1 sqm

Percent of complied Area: 87.9%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 3:00 p.m.

Simulation Result for lux level above 3000

Floor: 6th (Typical for 10th) Space: Office Area: 2983.8 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 606.2 sqm

Percent of complied Area: 79.7%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000

Simulation Result for lux level below 300

Simulation at 3:00 p.m.

Simulation Result for lux level above 3000

Floor: 11th Space: Office Area: 3178.4 sqm Area above 3000 lux: 0 sqm Area below 300 lux: 301.7 sqm

Percent of complied Area: 90.5%

Lux level above 300

Lux level above 3000

Lux level below 300

Lux level below 3000