Whole Building Design (WBD)

WHOLE BUILDING DESIGN Lighting Daylighting & Integrated Design Lab | Monsoon semester-2019

Suyashi Srivastava | PG181084 | CEPT University Guided by: Swati Puchalapalli

PROJECT INTRODUCTION A management office of 500 bedded charitable hospital and medical college in Hyderabad.

It is classified as a ‘Small Office’ (<10,000 m2) as per ECBC 2017 Building Typologies.

The major space division of the building consists of open office, conference rooms, individual cabins, service and circulation areas.

Location

Hyderabad (17.38° N, 78.48° E)

Building type Orientation Height of building

Mixed mode office N-S Longer axis 13.5 m (from mumty)

Floors Ground Floor area

G+2 640 m2

First Floor area Second Floor area

447 m2 369 m2

Total Built up area

1504.83 m2

Operation Hours Working Days HVAC type

9:00 am to 6:00 pm Monday to Friday PTAC (CoP: 2.5)

Fig: Perspective view of G+2 BAU office building modelled in Revit and analyzed in Design Builder

Air Conditioned area: 936.8 sq. m.

Not conditioned space: 389.3 sq. m.

Fig: Conditioned Space distribution and of ground floor ofspaces unconditioned office building in office

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

2

CLIMATE ANALYSIS HIGH TEMPERATURE

LOW TEMPERATURE

Observation • •

Max. DBT: May - avg. daily temperature 40.3°C Min. DBT: December - avg. daily temperature 15.9°C

• •

Max. avg. RH - 76% from August to October Min. avg. RH - 34.5% in May

•

Max. avg. Global Rad - 594 Wh/m2 from March to May Min. avg. Global Rad - 438 Wh/m2 from December to February

•

LOW HUMIDITY

HIGH HUMIDITY

Inference & Design decisions •

Insulated envelope for low U value to reduce heat ingress - High temperature and radiation in summer months.

•

High temperature and radiation with low humidity in summer month March to July requires humidification during occupancy hours.

LEC - evaporative coolers to be explored.

•

HIGH RADIATION

Passive cooling technique - Night flushing for summer and winter months with diurnal variation > 10℃. Not applicable for monsoon months with diurnal variation of < 5℃.

Fig: Dry bulb temperature, Relative Humidity and Solar radiation heat map of Hyderabad SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

3

CLIMATE ANALYSIS

Summer

Monsoon

Winter

(March – June)

(July-October)

(November-February)

Dry Bulb Temperature

Solar Radiation

Fig: Dry bulb temperature and solar radiation graph for Hyderabad

Fig: Wind flow pattern for Hyderabad

Wind rose Observation

Shading

•

Predominant Wind flow from West for 20% of 8760 hours in a year.

• North façade needs shading for summer months to avoid heat ingress.

(Other façades require compulsory shading)

•

Highest recorded wind flow 14 m/s from west direction

•

Lowest recorded wind flow 5 m/s.

• Shading required even in winter months – high solar radiation (300-650 W/sq.m) along with temperature (25℃- 40℃).

Inference & Design decisions

Inference & Design decisions

•

• Glazing with low U-value, low SHGC and high VLT to reduce conductive and radiative heat gain.

•

To reduce discomfort hours, avoid introducing Hot & dry wind directly into the interior spaces (temperature range of 27°C - 38°C)

Figure 5: Occupancy hours to be shaded.

Courtyard shaded by trees at site + with evaporative cooling could aid in providing wind protected climates.

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

• Maximize daylight autonomy with Light shelf, vision panel and daylight panel after optimizing the WWR at geometry level.

4

DAYLIGHT ANALYSIS WWR is redesigned as per ECBC 2017 daylight thumb rules: • Depth = 2 x Height of opening • Skylight = 1.4 x Ceiling height + Skylight width

A’

A’

A’

A

A

A

Optimizing openings at basic geometry level reduces window retrofitting at later stages.

Inference & Design decisions

SECOND FLOOR PLAN Daylit Space: 69%

• Passive daylighting strategies before adopting advance daylighting systems includes: ✓ Geometry modification by increasing height of opening by 650 mm

GROUND FLOOR PLAN Daylit Space: 49%

✓ optimized the WWR of space by 10%

FIRST FLOOR PLAN Daylit Space: 52% Table: Output sheet of designed WWR

✓ avoided windows on west façade by reducing corner windows • Office seating layout rearranged and made perpendicular to the windows to: ✓ avoid discomfort due to specular desktop screens ✓ allow daylight penetration into space by not forming obstruction.

Fig: Section AA’ through Building with rule of thumb, D = 2H SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

Gross Wall Area [m2] Above Ground Wall Area [m2] Window Opening Area [m2] Gross WindowWall Ratio [%]

Total

North (315° to 45°)

East (45° to 135°)

South (135° to 225°)

West (225° to 315°)

1087

314.6

252.7

321.8

197.6

1087

314.6

252.7

321.8

197.6

325.4

120.3

70.8

79.5

54.8

29.9

38.2

28.0

24.7

27.7

5

SHADING DESIGN

• North façade ribbon window is selfshaded due to the stepped massing of the building.

• Only the top most second floor requires an overhang of 0.3m in addition to the vertical fins 0.25m wide placed equidistant of 1.45m

• South façade shaded by 0.3 m wide vertical louvers + 0.5 m wide horizontal shade.

• The window is divided into daylight panel and View panel and light shelf is provided to maximize daylight ingress inside the space.

Fig: Section with North façade shaded by existing stepped geometry

• East and West façade windows requires a combination of vertical and horizontal shading device in the form of overhang coupled with vertical fins to avoid heat ingress and formation of glare due to low sun angles.

Fig: Section through the space with the dimensions of the shading device.

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

6

DAYLIGHT COMPLIANCE TARGET: Maximize the daylight availability to the occupants and reduce electricity loads.

Light Stanza is used for analyzing the daylighting performance of the building.

Work plane level : 0.8 m as per ECBC 2017

Inference & Design decisions • Reflectance of wall increased by 10% • Higher VLT glass (60%) used to achieve the given results.

Table: Input data for LIGHTStanza

Material Reflectance Ground Wall Roof Floor Glazing Furniture

As-Is case 20% 50% 70% 25% 50% 50%

Optimized Case 20% 60% 70% 25% 60% 50% SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

7

THERMAL COMFORT

Strategies Checklist

Adaptive thermal comfort (IMAC) band for ‘Mixed mode building’ vs Dry bulb temperature

Inference •

Decisions derived out of climate analysis for envelop optimization, system selection, system design optimization and operation strategies ENVELOPE OPTIMIZATION

• Decrease envelope heat gain with high thermal mass or cavity wall of Low U-value.

• WWR optimized as per Thumb rules to enhance daylight • Shading design reduces formation of glare with conductive and radiative heat gain.

• Glass VLT and reflectivity of materials fixed.

SYSTEM SELECTION

• Low energy cooling system – Ceiling fan and Evaporative cooler for winter month.

• HVAC and fan scheduled.

• Night purging and natural ventilation needs to be explored.

• Glazing SHGC needs to be fixed as per sensitivity analysis.

SYSTEM DESIGN OPTIMIZATION

• Daylighting optimization by introducing Light shelves and skylights.

• Existing PTAC system to be replaced with an efficient HVAC system as per peak cooling load and demand.

As per IMAC for mixed mode building total number of comfortable hours for operational hours are 1095 hours out of 2671 hours.

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

8

THERMAL ZONING & AS-IS MODELING

BASE CASE RESULT BAU PTAC (COP-2.5)

The As-Is case is modelled as per ECBC 2017 and divided into thermal zones as per the ECBC’s Whole Building Performance method with respect to conditioned and unconditioned spaces in Design Builder.

Interior Equipment, 23%

Fans, 2%

Cooling, 52% Interior Lighting, 22% Table: Base case end use result breakup

(b)

(a)

Fig: Thermal zoning of: (a) Ground floor (b) First floor (c) Second floor

(c)

Parameter

BAU

HVAC System

PTAC (COP-2.5)

Cooling [kWh] Interior Lighting [kWh] Interior Equipment [kWh] Fans [kWh]

112411.7 48592.3 50874.9 5138.6

Total Energy Consumption [kWh]

217017.5

EPI [kWh/m2] Unmet Hours Cooling Capacity (kW) Cooling Capacity (TR)

163.7 30.5 156.4 44.5

Sensible Cooling Load (kW) Latent Cooling Load (kW) Peak cooling load (kW)

118.8 17.1 136.0

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

9

Load breakdown in Elimination Paramterics 180.0

163.7 160.0

159.2

155.7

152.9

161.0

153.7

156.6

154.3

147.6

144.0

140.0

EPI (kWh/m2)

120.0

129.0 84.8

80.3

74.5

76.8

75.3

82.2

3.9

3.9

3.5

3.9

3.4

38.4

38.4

38.4

38.4

38.4

66.0

69.4

75.8

78.0

3.8

3.0

3.2

3.4

3.6

38.4

38.4

38.4

38.4

38.4

107.9

100.0 80.0 60.0

79.5

38.4

40.0 20.0

3.6 36.6

36.6

36.6

36.6

36.6

36.6

36.6

36.6

36.6

U value = 0.05 W/m2.K

SRI=0.01

U value = 0.05 W/m2.K

SRI=0.01

U value = 0.01

SHGC = 0.01

WWR = 0%

as proposed

ACH = 0

0.0 Elec. Light=0

Equipment =0

HVAC- off

Shading

Infilteration

LPD

EPD

HVAC

BAU

EPI Savings (%) Unmet Hours Cooling Capacity (kW) Cooling Capacity (TR) Peak cooling load (kW) Cooling Savings (%)

3.1 0.0

36.6

36.6

0.0

Parameter

74.7

68.2

Wall

BAU 163.7 30.5 156.4 44.5 136.0

Roof Interior Lighting

Wall U value = 0.05 W/m2.K

159.2 2.7% 44.5 148.1 42.1 134.5 1%

Window

Roof

Interior Equipment

Fans

Cooling [kWh]

Window

EPI

SRI=0.01

U value = 0.05 W/m2.K

SRI=0.01

U value = 0.01

SHGC = 0.01

WWR = 0%

152.9 6.5% 17.5 135.9 38.6 119.2 12%

155.7 4.9% 10.0 145.3 41.3 126.3 7%

153.7 6.1% 98.0 127.3 36.2 110.7 19%

161.0 1.6% 58.5 154.6 43.9 134.4 1%

144.0 12.0% 56.5 118.3 33.6 102.9 24%

147.6 9.8% 43.5 126.1 35.8 109.6 19%

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

Shading

Infiltration

LPD

EPD

HVAC

as proposed

ACH = 0

Elec. Light=0

Equipment =0

HVAC- off

154.3 5.7% 0.0 135.1 38.4 117.5 14%

156.6 4.3% 16.0 144.8 41.2 125.9 7%

129.0 21.2% 35.5 147.4 41.9 128.2 6%

107.9 34.1% 37.0 78.7 22.4 68.5 50%

74.7 54.3% 2891.0 155.1 44.1 134.9 1%

10

Wall SRI Sensitivity Analysis

14%

SENSITIVITY ANALYSIS

12%

164

163.65 162.29

Wall SRI sensitivity is analyzed by simulating SRI from reflectivity 50% for BAU case to 100% for elimination parametric.

166

161.61

10%

162

160.92

160.23

160

159.88

The wall SRI is selected with reflectivity of 60% as per Daylighting analysis earlier.

158

8%

156 6%

154 5%

4%

EPI savings of 1% and cooling capacity savings of 3% is observed for this parameter.

5%

152

4% 7%

3%

0%

1%

1%

2%

50

60

70

80

BAU Cooling Capacity Savings EPI Savings EPI

0%

148

2%

2%

92

95

100

5%

5%

5%

Wall SRI 3%

3%

4%

0%

1%

1%

2%

2%

2%

7%

163.65

162.29

161.61

160.92

160.23

159.88

152.94

4 mm 4 mm Cool 4 mm ABC Cool 4 mm ABC Cool 4 mm ABC Cool AcryShield Roof coat + coat + 230 mm coat + 230 mm coat + 230 mm coat + 230 mm 230 mm thk thk Brick wall thk Brick wall thk Brick wall thk Brick wall Brick wall

230 mm thk Brick wall U-Value: 0.4 (ECBC) (12 mm thk cement plaster + 70 mm thk XPS Insulation + 210 mm burnt red brick wall + 8 mm thk cement plaster)

150

3%

2%

0%

152.94

ABC Cool coat

BAU CASE

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

₹ 280 per liter

₹ 280 per liter

₹ 300 per liter

1086.7 sq.m. ₹ 6,086

1086.7 sq.m. ₹ 6,086

1086.7 sq.m. ₹ 6,520

AcryShield, Cool Roof ELIMINATION SRI - 117 Paint, SRI - 122 PARAMETRIC ₹ 330 ₹ 350 per liter per liter 1086.7 sq.m. ₹ 7,172

1086.7 sq.m. ₹ 7,607

11

146

EPI (kWh/m2)

Savings (%)

5%

Roof SRI Senstivity Analysis

30%

SENSITIVITY ANALYSIS

166

164

163.65 25%

Roof SRI sensitivity is analyzed by simulating SRI from reflectivity 40% for BAU case to 100% for elimination parametric.

162

The roof SRI is selected with maximum reflectivity of 95% to minimize heat gain by radiation.

20%

158

15%

16%

16%

152.31

152.31

10%

16%

18%

18%

154 151.83

152 151.13

151.13 150

EPI savings of 8% and cooling capacity savings of 18% is observed for this parameter.

148

5%

0%

7%

7%

7%

8%

8%

90

90

92

95

100

0% 40

Roof SRI Cooling Capacity Savings

0%

16%

16%

16%

18%

18%

EPI Savings

0%

7%

7%

7%

8%

8%

163.65

152.31

152.31

151.83

151.13

151.13

EPI

200 mm thk RCC slab U-Value: 0.3 (ECBC)

Cool roof paint 300 / liter + 18% GST ₹ 354.0

156

BAU CASE

(12 mm cement plaster+ 102 mm XPS insulation+ 150 mm RCC slab+ 8 mm cement plaster)

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

3 mm ABC 2 mm 2 mm ABC Cool 2 mm Cool Roof Weather Proof AcryShield + 200 coat + 200 mm Paint + 200 mm Terrace Tiles + 200 mm thk RCC ELIMINATION thk RCC slab thk RCC slab mm thk RCC slab slab PARAMETRIC ABC Weather AcryShield, SRI - Cool Roof Paint, ABC Cool coat Proof Terrace Tiles 117 SRI - 122 ₹ 807.3 ₹ 376.7 ₹ 330.0 ₹ 350.0 per sq. m. per liter per liter per liter 524.4 sq.m. ₹ 4,234

524.4 sq.m. ₹ 3,951

524.4 sq.m. ₹ 3,461

524.4 sq.m. ₹ 3,671

12

146 144

EPI (kWh/m2)

Savings (%)

160

Glazing available for 60% VLT

SENSITIVITY ANALYSIS

16% EPI Savings

Cooling Capacity Savings

14%

Savings (%)

12% 10% 8% 14%

13%

6% 10% 4%

EPD Senstivity Analysis

14% 163.65 3%

7%

164

6%

162 158

8%

156 6% 10% 4%

2%

2%

3%

0%

154 152 150

0% ECBC BAU EPI Savings

147.25

ECBC+

148 146

Super ECBC

Cooling Capacity Savings

EPI for Lighting power density (LPD) is reduced by 3% with ECBC+ and by 10% in super ECBC case.

EPI

161 160

3%

2%

159

2%

4%

1% 0%

2% 0% 1 STAR

EPI Savings

3 STAR

VLT: 59% U-Value: 1.7 W/sqm K

EPI

Saint Gobain Saint Gobain Saint Gobain - Antelio Plus: Planitherm: Mint Green Planitherm: Mint Green Emerald Glaze (ST 467) (PLT TG) (PLT TG)

EPD

EPI for Equipment power density (EPD) Is reduced by 2% with 3 STAR and by 4% with 5 STAR equipment.

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

VLT: 55% U-Value: 5.64 W/sqm K

VLT: 62% U-Value: 1.77 W/sqm K

156

157

5 STAR

Cooling Capacity Savings

0.26

Double Glazed Unit Double Glazed Unit (outer: 6mm with coating Single Glazed Unit (outer: 6mm with coating Face 2 - 12mm Air Gap (6mm thick, coating face 2) Face 2 - 12mm Air Gap - inner 6mm Planitherm inner 6mm Clear) Total (Low E coating Face 3))

158 157.14

0.29

SHGC of Glazing with shading (Fixed VLT-60% as per Daylight and shading analysis)

162

160.38

4%

BAU

LPD

0.32 163 2%

6%

6%

6%

0%

164

163.65

5%

Savings (%)

160

158.14

EPI (kWh/m2)

10%

Savings (%)

166

EPI (kWh/m2)

LPD Senstivity Analysis 12%

2%

₹ 1,700 per sq. m.

₹ 2,200 per sq. m.

₹ 2,200 per sq. m.

325.4 sq.m. ₹ 553,180

325.4 sq.m. ₹ 715,880

325.4 sq.m. ₹ 715,880

13

Cumulative ECMs Savings 180

60%

160

As-Is set point Proposed set point Month temp (⁰C) temp (⁰C) Jan 24 27 Feb 24 28 Mar 24 28 Apr 24 29 May 24 30 Jun 24 30 Jul 24 30 Aug 24 29 Sep 24 29 Oct 24 29 Nov 24 28 Dec 24 28

EPI (kWh/m2)

• Passive strategies alone reduced EPI by 10% and peak cooling by 30%.

50%

140 120 100 80

163.65

19% 150.08

19%

40 0%

0

Units

35%

38% 49%

38%

40%

36% 38%

36%

30%

156.26

123.63

20%

106.49

147.73

86.45

6%

10%

5%

0%

117.79

0%

60

95

SHGC: 0.29, VLT: 62% U-Value: 1.77 W/sqm K

5 STAR

BAU

Wall SRI

Roof SRI

Window SHGC + Shading

EPD

EPI

ECBC Super - LED Daylight Sensors Lighting

LPD

Peak cooling load Percentage savings

Roof SRI

Window SHGC + Shading

60

95

SHGC: 0.29, VLT: 62% U-Value: 1.77 W/sqm K

5 STAR

162.29 1% 32.5 152.4 43.3 3% 132.5 3%

150.08 8% 15.5 126.0 35.8 19% 110.2 19%

147.73 10% 0 106.5 30.3 32% 94.9 30%

141.09 14% 0 103.7 29.5 34% 92.5 32%

BAU

kWh/m2 163.65 % 0% hrs 30.5 kW 156.4 Cooling Capacity TR 44.5 Cooling Capacity Savings % 0% Peak cooling load kW 136.0 Percentage savings % 0% EPI Savings Unmet Hours

30%

32% 141.09

37%

3%

3%

Wall SRI Parameters

162.29

60

20

34%

32%

EPD

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

LPD

Daylighting control

VRF (COP-4.59)

HVAC System

ECBC BASE CASE

Cooling Capacity Savings

Daylighting control

ECBC Super - LED Daylight Sensors Lighting

123.63 24% 0 99.0 28.2 37% 88.5 35%

Floating Temperature

Peak cooling load (kW) % savings

CUMULATIVE ECMs

117.79 28% 0 97.2 27.6 38% 87.0 36%

HVAC System VRF (COP-4.59)

106.49 35% 0 97.2 27.6 38% 70.0 49%

Floating Temperature

ECBC BASE CASE

86.45 47% 0 97.2 27.6 38% 86.7 36%

156.26 5% 40 147.8 42.0 6% 129.5 5% 14

Cumulative ECMs 180.00

163.65

162.29

160.00

150.08

147.73

141.09

EPI (kWh/m2)

140.00 120.00

123.63 84.77

83.41

71.78

68.05

100.00 80.00 60.00

106.49 66.11 86.45

3.87

3.81

3.25

3.10

38.36

38.36

38.36

38.36

62.68

36.64

36.64

36.64

36.64

33.41

46.77

2.84

2.78

6.23

2.45

33.41

33.41

33.41

40.95

15.11

15.11

15.11

10.77

60

95

SHGC: 0.29, VLT: 62% U-Value: 1.77 W/sqm K

5 STAR

ECBC Super - LED Lighting

Daylight Sensors

VRF (COP-4.59)

Wall SRI

Roof SRI

Window SHGC + Shading

EPD

LPD

Daylighting control

HVAC System

Interior Lighting

30.85

36.64

0.00

BAU

61.33

3.00

40.00 20.00

117.79

Interior Equipment

Fans

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

Cooling

Floating Temperature

EPI

15

RESULT & FUTURE SCOPE OF WORK

BAU vs ECBC vs Proposed case 0.9

Savings (%) 13

8

143.7

140.0

38%

0.6

120.0

0.5

100.0 86.5

0.4

80.0

0.3

60.0 47.2%

0.2

14 11

160.0

156.3

0.7

Cost analysis of BAU vs Proposed case 90,000,000 80,000,000 70,000,000 60,000,000 50,000,000 40,000,000 30,000,000 20,000,000 10,000,000 0

163.7

12

0.1

10

0.0

40.0

6%

20.0

12.2%

4.5%

EPI (kWh/m2)

0.8

The project analyses the given base case building and aims to propose a building at par with ECBC 2017 prescribed case.

180.0

0.0

8

0 PTAC (COP-2.5)

PTAC (COP - 2.5)

VRF (COP - 3.02)

VRF (COP - 4.09)

6

BAU

ECBC

ECBC

PROPOSED

4 40,045,000

80,400,600

78,056,000

BAU CASE

ECBC CASE

PROPOSED CASE

EPI Savings (%)

2

Cooling Capacity Savings

EPI

0

Total Cost (Rs.)

Payback period

Proposed case envelope can be further optimized by replacing envelope’s BAU materials like Brick by AAC or Cavity walls.

Renewable energy sources like PV can be explored for energy production.

Parameter HVAC System EPI Savings (%) Unmet Hours Cooling Capacity (kW) Cooling Capacity (TR) Cooling Capacity Savings (%) Peak cooling load (kW) Percentage reduction (%)

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

BAU

ECBC

PTAC (COP-2.5)

VRF (COP - 3.02)

163.7 30.5 156.4 44.5 136.0 -

PROPOSED VRF (COP - 4.09)

143.7 12.2% 8.5 147.8 42.0 6% 128.5 7%

86.5 47.2% 0.0 97.2 27.6 38% 86.7 49%

16

Softwares used:

Grasshopper

Ladybug

THANK YOU Suyashi Srivastava | PG181084 | CEPT University

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

17

APPENDIX

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

18

CLIMATE ANALYSIS Diurnal (24 hr) Averages:

Ground Temperature:

•

Maximum average daily Global horizontal radiation for March to May is 594 Wh/sq.m

•

Due to high cloud cover in winters, radiation level is low from December to February with an average daily minimum radiation of 438 Wh/sq.m

•

Diurnal variation is high for summer months and hence can be explored for passive cooling strategies like Night flushing. This strategy would not work for monsoon months with low diurnal variation.

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

Figure 12: Ground temperature analysis from Climate Consultant

• Ground temperature varies from 3 - 4℃ as we go deeper in the soil.

• Ground temperature variations should be >10℃ to make Earth air tunnel (EAT), a passive cooling technique like help reduce of the heating/cooling load of a building feasible.

19

Items

ZONE

Value

Wall U-Value (external)

Input Sheet

Envelope

Activity Level

Lighting Power Density

W/sq.m.K

Roof U-Value

W/sq.m.K

Glass U-Value Glass SHGC

W/sq.m.K Nil

200 mm thk RCC slab (30 mm Roof tile, 12 mm cement plaster, 150 3.2 mm RCC (1% reinforced), 8 mm cement plaster) 5.60Standard 6mm Single plane Glass 0.75Standard 6mm Single plane Glass 50.0Standard 6mm Single plane Glass

WWR

%

30%

Clothing Rate

Clo W/sq.m.

Individual Offices Open office Meeting rooms/Conferenc e hall Utility/ Electrical Restroom Staircase Circulation/Lobby

W/sq.m.

W/sq.m.

1.2 70.0

Comment

230 mm thk Brick wall 0.48(12 mm thk cement plaster + XPS Insulation + 210 mm burnt red brick wall + 8 mm thk cement plaster) 200 mm thk RCC slab 0.32(30 mm Roof tile, 12 mm cement plaster, XPS insulation, 150 mm RCC (1% reinforced), 8 mm cement plaster) 3.006 mm Thk Single plane Glass 0.50Maximum SHGC for latitude ≥ 15°N 60.06 mm Thk Single plane Glass

Designed as per ECBC 2017 daylighting thumbrule

30%Designed as per ECBC 2017 daylighting thumbrule

Proposed Value

Comment 230 mm thk Brick wall (12 mm thk cement plaster + XPS Insulation + 210 0.48 mm burnt red brick wall + 8 mm thk cement plaster) 200 mm thk RCC slab (30 mm Roof tile, 12 mm cement plaster, XPS 0.32 insulation, 150 mm RCC (1% reinforced), 8 mm cement plaster) 1.77 SHGC as per fixed VLT and material 0.29 availabilitySaint Gobain Double Glazed Unit 62.0 (outer: 6mm with coating Face 2 - 12mm Air Gap - inner 6mm Clear) 30% Designed as per ECBC 2017 daylighting thumbrule

Clothing insulation as a behavioural adaptation for thermal comfort in Indianoffice buildings - 1 clo = 0.155 m2·°C/W (0.88 ft2·h·°F/Btu).

Sedentary activity (office) source: https://www.engineeringtoolbox.com/met-metabolic-rate-d_733.html

W/sq.m.

10.0 10.0

LPD using space function method LPD using space function method

5.4 5.4

LPD using space function method - ECBC Super LPD using space function method - ECBC Super

11.5

LPD using space function method

5.7

LPD using space function method - ECBC Super

7.1 7.7 5.5 9.1

LPD using space function method LPD using space function method LPD using space function method LPD using space function method

3.5 3.8 2.7 4.6

LPD using space function method - ECBC Super LPD using space function method - ECBC Super LPD using space function method - ECBC Super LPD using space function method - ECBC Super

3.02 4.80 1.15

As per ECBC 2017, for VRF capacity > 10.5 kWr Air Cooled Chiller Max. allowed Cooling Sizing factor

1.25 0.60 0.70 165

Max. allowed Heating Sizing factor (Heating is off) As per ECBC As per ECBC

As per ECBC 2017

W/sq.m.

W/sq.m.

W/sq.m.

W/sq.m.

Nil Sizing Factor

Fan Efficiency Pump Efficiency Fan Pressure Rise

Value

230 mm thk Brick wall 2.5(12 mm thk cement plaster + 210 mm burnt red brick wall + 8 mm thk cement plaster)

%

Metabolic Rate

ECBC 2017

Comment

Glass VLT

Nil HVAC Specs

BAU

UoM

Nil % % Pa

2.5

PTAC

1.15Max. allowed Cooling Sizing factor Max. allowed Heating Sizing factor (Heating is 1.25off) 0.60As per ECBC 0.70As per ECBC 165

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

20

HVAC SENSTIVITY ANALYSIS

BAU VRF + Heat Recovery

BAU PTAC system

BAU VRF + Heat Recovery + DOAS system

Cooling Interior Lighting Interior Equipment Fans

kWh kWh kWh kWh

112411.68 48592.32 50874.89 5138.58

BAU PTAC (COP:2.5) 112411.68 48592.32 50874.89 5138.58

Total Energy Consumption

kWh

217017.47

217017.47

184662.44

176036.5

163.65 0% 30.5 156.4 44.5 0% 136.0 0%

163.65 0% 30.5 156.4 44.5 0% 136.0 5%

143.9 12% 0 156.4 44.5 0% 129.5 5% LG MULTI IV ARUN560LTE4

132.75 19% 31.5 156.4 44.5 0% 48.2 65% LG MULTI IV ARUN560LTE4

Parameters

EPI Savings Unmet Hours Cooling Capacity Cooling Capacity Savings Peak cooling load Percentage savings

Units

kWh/m2 % hrs kW TR % kW %

Material Assembly & Specs

BAU

BAU CASE

HVAC VRF (COP:4.68) VRF+DOAS (COP:4.68) 77647.11 53985.87 42432.34 48592.32 50874.01 50874.89 13708.98 22583.42

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

8:00 am to 6:00 pm from Monday to Friday Fixed temperature 24℃

21

HVAC sensitivity analysis

COP 5.09

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

22

kWh kWh kWh kWh

0.05 106512.9 48592.32 50874.89 5162.8

0.2 110513.79 48592.32 50874.89 5057.09

0.3 111324.92 48592.32 50874.89 5093.2

0.4 (ECBC) 111804.39 48592.32 50874.89 5114.49

Wall U-Value 0.5 111980.27 48592.32 50874.89 5122.05

0.8 112358.97 48592.32 50874.89 5139.07

1.2 112147.56 48592.32 50874.89 5128.16

1.5 112019.57 48592.32 50874.89 5121.71

2.5 112411.68 48592.32 50874.89 5138.58

Total Energy ConsumptionkWh

211142.91

215038.09

215885.33

216386.09

216569.53

216965.25

216742.93

216608.49

217017.47

159.21 3% 44.5 148.07 42.10 5% 130.5 4%

161.25 1% 53.5 150.09 42.68 4% 130.5 4%

161.99 1% 53 151.32 43.03 3% 131.6 3%

162.26 1% 50 151.89 43.19 3% 132.1 3%

162.58 1% 49.5 152.25 43.29 3% 132.4 3%

162.96 0% 33 153.12 43.54 2% 133.2 2%

163.51 0% 32.5 153.67 43.70 2% 133.6 2%

163.6 0% 32.5 154.06 43.81 1% 134.0 1%

163.65 0% 32.5 156.4 44.46 0% 136.0 0%

Parameters

WALL sensitivity & Cost analysis

Cooling Interior Lighting Interior Equipment Fans

Units

kWh/m2 % hrs kW Cooling Capacity TR Cooling Capacity Savings % Peak cooling load kW Percentage savings % EPI Savings Unmet Hours

230 mm thk Brick 230 mm thk Brick 230 mm thk Brick 230 mm thk Brick 230 mm thk Brick 230 mm thk Brick 230 mm thk Brick wall wall wall wall wall wall wall

Material Assembly & Specs

(12 mm thk (12 mm thk (12 mm thk (12 mm thk (12 mm thk (12 mm thk (12 mm thk cement plaster + cement plaster + cement plaster + cement plaster + cement plaster + cement plaster + cement plaster + 150 mm thk XPS 98 mm thk XPS 70 mm thk XPS 52 mm thk XPS 27 mm thk XPS 13 mm thk XPS 7 mm thk XPS Insulation + 210 Insulation + 210 Insulation + 210 Insulation + 210 Insulation + 210 Insulation + 210 Insulation + 210 mm burnt red mm burnt red mm burnt red mm burnt red mm burnt red mm burnt red mm burnt red brick wall + 8 mm brick wall + 8 mm brick wall + 8 mm brick wall + 8 mm brick wall + 8 mm brick wall + 8 mm brick wall + 8 mm ELIMINATION thk cement thk cement thk cement thk cement thk cement thk cement thk cement PARAMETRIC plaster) plaster) plaster) plaster) plaster) plaster) plaster)

Company Cost + GST Per Unit

₹ 1,120 per sq. m.

Area of Surface Per Unit Total Cost

1086.6 sq. m. ₹ 1,216,992

INSUboard by Allied Insulation India (Blue XPS Board Insulation - available thickness 20,25,30,50,75 and 100 mm) ₹ 640 ₹ 520 ₹ 480 ₹ 240 N.A. per sq. m. per sq. m. per sq. m. per sq. m. per sq. m.

1086.7 sq. m. ₹ 695,488

1086.7 sq. m. ₹ 565,084

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

1086.7 sq. m. ₹ 521,616

1086.7 sq. m. ₹ 260,808

1086.7 sq. m. ~

N.A. per sq. m.

1086.7 sq. m. ~

23

BAU CASE

Wall U-value Senstivity Analysis

6% 5%

Savings (%)

3%

5%

2% 1%

4%

3%

3% 1%

1%

3% 1%

3% 1%

2%

2%

0%

0%

1%

0%

0%

0% 0.05

0.2

0.3

0.4 (ECBC)

0.5

0.8

-1%

1.2

0%1.5

2.5

Wall U-Value

EPI Savings

Cooling Capacity Savings

Expon. (Cooling Capacity Savings)

Log. (Cooling Capacity Savings)

Roof U-value Senstivity Analysis

10% 8%

Savings (%)

WALL sensitivity & Cost analysis

4%

6% 4% 2%

8%

7%

8%

7%

6%

5% 2%

1%

1%

1%

5% 1%

4% 0%

0% 0.01

0.2

0.3 (ECBC)

0.5

0.8

-2%

1.2

1.5

2% 0% 2

0%

0%

3.2

Roof U-Value

EPI Savings

Cooling Capacity Savings

Expon. (Cooling Capacity Savings)

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

Log. (Cooling Capacity Savings)

24

ROOF sensitivity & Cost analysis

Parameters

Units

Cooling Interior Lighting Interior Equipment Fans Total Energy Consumption EPI Savings Unmet Hours

Cooling Capacity Cooling Capacity Savings Peak cooling load Percentage savings

Roof U-Value

kWh kWh kWh kWh

0.01 101910.7 48592.32 50874.89 5162.8

0.2 113271.53 48592.32 50874.89 5182.76

0.3 (ECBC) 113313.86 48592.32 50874.89 5184.3

0.5 113402.97 48592.32 50874.89 5187.66

0.8 113542.93 48592.32 50874.89 5193.13

1.2 113754.65 48592.32 50874.89 5201.78

1.5 113935.12 48592.32 50874.89 5209.46

2 114309.41 48592.32 50874.89 5225.89

3.2 112411.68 48592.32 50874.89 5138.58

kWh

206540.71

217921.5

217965.37

218057.84

218203.27

218423.64

218611.79

219002.51

217017.47

155.70 5% 44.5 145.28 41.31 7% 126.3 7%

160.97 2% 0.5 143.64 40.84 8% 124.9 8%

161.94 1% 0.5 144.19 41.00 8% 125.4 8%

162.08 1% 0.5 145.23 41.30 7% 126.3 7%

162.59 1% 0.5 146.72 41.72 6% 127.6 6%

162.76 1% 0.5 148.7 42.28 5% 129.3 5%

163.05 0% 0.5 150.19 42.71 4% 130.6 4%

163.45 0% 0.5 152.84 43.46 2% 132.9 2%

163.65 0% 30.5 156.4 44.46 0% 136.0 0%

kWh/m2 % hrs kW TR % kW %

200 mm thk RCC 200 mm thk RCC 200 mm thk RCC 200 mm thk RCC 200 mm thk RCC 200 mm thk RCC 200 mm thk RCC slab slab slab slab slab slab slab

Material Assembly & Specs

(30 mm Roof tile, (30 mm Roof tile, (30 mm Roof tile, (30 mm Roof tile, (30 mm Roof tile, (30 mm Roof tile, (30 mm Roof tile, 12 mm cement 12 mm cement 12 mm cement 12 mm cement 12 mm cement 12 mm cement 12 mm cement plaster, 160 mm plaster, 102 mm plaster, 58 mm plaster, 32 mm plaster, 18 mm plaster, 12 mm plaster, 6 mm XPS insulation, XPS insulation, XPS insulation, XPS insulation, XPS insulation, XPS insulation, XPS insulation, 150 mm RCC (1% 150 mm RCC (1% 150 mm RCC (1% 150 mm RCC (1% 150 mm RCC (1% 150 mm RCC (1% 150 mm RCC (1% reinforced), 8 reinforced), 8 reinforced), 8 reinforced), 8 reinforced), 8 reinforced), 8 reinforced), 8 ELIMINATION mm cement mm cement mm cement mm cement mm cement mm cement mm cement PARAMETRIC plaster) plaster) plaster) plaster) plaster) plaster) plaster)

Company Cost + GST Per Unit

₹ 1,260 per sq. m.

Area of Surface Per Unit Total Cost

524.4 sq. m. ₹ 660,744

INSUboard by Allied Insulation India (Blue XPS Board Insulation - available thickness 20,25,30,50,75 and 100 mm) ₹ 680 ₹ 580 ₹ 340 N.A. N.A. per sq. m. per sq. m. per sq. m. per sq. m. per sq. m.

524.4 sq. m. ₹ 356,592

524.4 sq. m. ₹ 304,152

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

524.4 sq. m. ₹ 178,296

524.4 sq. m. ~

524.4 sq. m. ~

N.A. per sq. m.

524.4 sq. m. ~

25

BAU CASE

Wall SRI

WALL sensitivity & Cost analysis

Parameters

Units

50

60

70

80

92

95

100

Cooling Interior Lighting Interior Equipment Fans

kWh kWh kWh kWh

112411.68 48592.32 50874.89 5138.58

110616.07 48592.32 50874.89 5054.77

109760 48592.32 50874.89 5014.26

108888.88 48592.32 50874.89 4973.09

108013.71 48592.32 50874.89 4931.7

107577.75 48592.32 50874.89 4911.06

106512.9 48592.32 50874.89 4580.94

Total Energy Consumption

kWh

217017.47

215138.05

214241.47

213329.18

212412.62

211956.02

210561.05

EPI Savings Unmet Hours

kWh/m2 % hrs kW TR % kW %

163.65 0% 30.5 156.4 44.46 0% 136.0 0%

162.29 1% 32.5 152.37 43.33 3% 132.5 3%

161.61 1% 34 150.98 42.93 3% 131.3 3%

160.92 2% 34.5 149.55 42.52 4% 130.1 4%

160.23 2% 35 148.65 42.27 5% 128.8 5%

159.88 2% 37 148.32 42.17 5% 128.1 6%

152.94 7% 44.5 148.07 42.10 5% 134.5 1%

Cooling Capacity Cooling Capacity Savings Peak cooling load Percentage savings

4 mm ABC Cool 4 mm ABC Cool 4 mm ABC Cool 4 mm AcryShield 4 mm Cool Roof coat + 230 mm thk coat + 230 mm thk coat + 230 mm thk coat + 230 mm thk coat + 230 mm thk Brick wall Brick wall Brick wall Brick wall Brick wall

Material Assembly & Specs

BAU CASE Cost + GST Per Unit

₹ 280 per liter

₹ 280 per liter

₹ 300 per liter

AcryShield, SRI 117 ₹ 330 per liter

Area of Surface Per Unit Total Cost

1086.7 sq.m. ₹ 6,086

1086.7 sq.m. ₹ 6,086

1086.7 sq.m. ₹ 6,520

1086.7 sq.m. ₹ 7,172

Company

ABC Cool coat

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

Cool Roof Paint, SRI - 122 ₹ 350 per liter 1086.7 sq.m. ₹ 7,607

ELIMINATION PARAMETRIC

26

Wall SRI Senstivity Analysis

14%

8000

7000

WALL sensitivity & Cost analysis

12%

6000 5%

5000

8% 4000 6% 5% 4%

4% 7%

3%

2%

0%

3000

5%

3%

163.65 0% 50

1% 161.61 70

1% 162.29 60

2% 160.92 80

2%

2%

160.23 92

159.88 95

152.94 100

0

Wall SRI

Cooling Capacity Savings

0%

3%

3%

4%

5%

5%

5%

EPI Savings

0%

1%

1%

2%

2%

2%

7%

163.65

162.29

161.61

160.92

160.23

159.88

152.94

₹ 6,086

₹ 6,086

₹ 6,520

₹ 7,172

₹ 7,607

Total Cost

2000

1000

BAU

EPI

EPI (kWh/m2)

Savings (%)

10%

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

27

Roof SRI

ROOF sensitivity & Cost analysis

Parameters

Units

40

90

90

92

95

100

Cooling Interior Lighting Interior Equipment Fans

kWh kWh kWh kWh

112411.68 48592.32 50874.89 5138.58

98066.34 48592.32 50874.89 4446.66

98069.41 48592.32 50874.89 4447.37

97467.02 48592.32 50874.89 4416.99

96573.87 48592.32 50874.89 4371.62

99805.74 48592.32 4580.94 4580.94

Total Energy Consumption

kWh

217017.47

201980.21

201983.99

201351.22

200412.7

157559.94

163.65 0% 30.5 156.4 44.46 0% 136.0

152.31 7% 27.5 131.6 37.42 16% 114.4 16%

152.31 7% 18 131.9 37.49 16% 114.7 16%

151.83 7% 37.5 130.58 37.13 16% 113.6 16%

151.13 8% 76 128.7 36.60 18% 111.9 18%

151.13 8% 98 128.7 36.60 18% 111.9 18%

EPI Savings Unmet Hours

Cooling Capacity Cooling Capacity Savings Peak cooling load Percentage savings

kWh/m2 % hrs kW TR % kW %

3 mm ABC Weather Proof Terrace Tiles + 200 mm thk RCC slab

Material Assembly & Specs

BAU CASE Cost + GST Per Unit

ABC Weather Proof Terrace Tiles ₹ 807.3 per sq. m.

Area of Surface Per Unit Total Cost

524.4 sq.m. ₹ 4,234

Company

2 mm ABC Cool coat 2 mm AcryShield + 2 mm Cool Roof Paint + 200 mm thk RCC 200 mm thk RCC slab + 200 mm thk RCC slab slab

ABC Cool coat

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

₹ 376.7 per liter

524.4 sq.m. ₹ 3,951

Cool Roof Paint, SRI AcryShield, SRI - 117 122 ₹ 330.0 ₹ 350.0 per liter per liter

524.4 sq.m. ₹ 3,461

ELIMINATION PARAMETRIC

524.4 sq.m. ₹ 3,671

28

EPD & LPD sensitivity analysis

Parameters

Units

EPD

LPD

Cooling Interior Lighting Interior Equipment Fans

kWh kWh kWh kWh

1 STAR 112411.7 48592.32 50874.89 5138.58

Total Energy Consumption

kWh

217017.5

212676.25

208382.63

217017.5

163.65 0% 30.5 156.4 44.5 0% 136.0 0%

160.38 2% 31.5 153.9 43.7 2% 133.8 2%

157.14 4% 32 152.6 43.4 2% 132.7 2%

163.65 0% 30.5 156.4 44.5 0% 136.0 0%

EPI Savings Unmet Hours Cooling Capacity Cooling Capacity Savings Peak cooling load Percentage savings

kWh/m2 % hrs kW TR % kW %

Material Assembly & Specs

BAU CASE

3 STAR 111174.16 48592.32 47830.17 5079.6

5 STAR 109961.34 48592.32 44807.19 5021.78

ECBC 112411.7 48592.32 50874.89 5138.58

ECBC+ 111319.27 42432.34 50874.01 5086.82

ECBC Super 109089.8 30323.15 50874.01 4981.27

209712.44

195268.23

3 STAR

5 STAR

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

BAU CASE

158.14 147.25 3% 10% 32 33 154.0 151.5 43.8 43.1 2% 3% 133.9 131.8 2% 3% Fluorescent LED Lighting Lighting

29

Glazing Senstivity Analysis

25%

Savings (%)

20% 15% 24% 10%

18%

5% 0% 0%

1% 2%

2% 4%

0.75 (No Shading)

0.65

0.55

4%

7%

10% 5%

13% 7%

12%

9%

GLAZING sensitivity analysis

0% 0.45

0.35

0.25

0.15

0.01

SHGC of Glazing with shading Cooling Capacity Savings

EPI Savings

SHGC of Glazing with shading Parameters

Units

Cooling Interior Lighting Interior Equipment Fans

kWh kWh kWh kWh

0.75 (No Shading) 112411.68 48592.32 50874.89 5138.58

Total Energy Consumption

kWh

217017.47

214815.52

212253.81

208454.53

205489.2

201997.01

197197.85

190998.39

163.65 0% 30.5 156.4 44.5 0% 136.0 0%

161.99 1% 30 153.2 43.6 2% 133.2 2%

160.06 2% 29.5 150.4 42.8 4% 130.8 4%

157.19 4% 30 145.4 41.3 7% 126.4 7%

154.95 5% 31 141.3 40.2 10% 122.9 10%

152.32 7% 32 135.8 38.6 13% 118.1 13%

148.7 9% 36 128.0 36.4 18% 111.3 18%

144.03 12% 56.5 118.3 33.6 24% 102.9 24%

EPI Savings Unmet Hours Cooling Capacity Cooling Capacity Savings Peak cooling load Percentage savings

kWh/m2 % hrs kW TR % kW %

Material Assembly & Specs

BAU CASE

0.65

0.55

0.45

0.35

0.25

110309.1 48592.32 50874.89 5039.21

107862.89 48592.32 50874.89 4923.71

104234.67 48592.32 50874.89 4752.65

101403.13 48592.32 50874.89 4618.86

98068.39 48592.32 50874.89 4461.41

93485.14 48592.32 50874.89 4245.5

87564.39 48592.32 50874.89 3966.79

Fixed VLT-60% as per Daylight and shading analysis

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

0.15

0.01

ELIMINATION PARAMETRIC

30

Parameters

SHGC of Glazing with shading (Fixed VLT-60% as per Daylight and shading analysis)

Units

GLAZING Cost analysis

0.32

0.29

0.26

Cooling Interior Lighting Interior Equipment Fans

kWh kWh kWh kWh

100687.42 48592.32 50874.89 4585.01

99785.31 48592.32 50874.89 4545.85

99048.97 48592.32 50874.89 4510.87

Total Energy Consumption

kWh

204739.64

203798.37

203027.05

154.39 6% 31 140.3 39.9 10% 122.0 10%

153.68 6% 48 136.2 38.7 13% 118.4 13%

153.1 6% 52 135.0 38.4 14% 117.4 14%

EPI Savings Unmet Hours Cooling Capacity Cooling Capacity Savings Peak cooling load Percentage savings

kWh/m2 % hrs kW TR % kW %

VLT: 62% U-Value: 1.77 W/sqm K

VLT: 55% U-Value: 5.64 W/sqm K Material Assembly & Specs Single Glazed Unit (6mm thick, coating face 2)

Cost + GST Per Unit

Saint Gobain - Antelio Plus: Emerald Glaze (ST 467) ₹ 1,700 per sq. m.

Area of Surface Per Unit Total Cost

325.4 sq.m. ₹ 553,180

Company

VLT: 59% U-Value: 1.7 W/sqm K

Double Glazed Unit (outer: 6mm with coating Face 2 - 12mm Air Gap - inner 6mm Planitherm Total (Low E coating Face 3)) Saint Gobain - Planitherm: Mint Green Saint Gobain - Planitherm: Mint Green (PLT (PLT TG) TG) ₹ 2,200 ₹ 2,200 per sq. m. per sq. m.

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

Double Glazed Unit (outer: 6mm with coating Face 2 12mm Air Gap - inner 6mm Clear)

325.4 sq.m. ₹ 715,880

325.4 sq.m. ₹ 715,880

31

Load breakdown in Elimination Paramterics

Elimination Parametric

180.0 160.0

Cooling [kWh] Cooling EPI [kWh/m2] Interior Lighting [kWh/m2] Interior Equipment [kWh/m2] Fans [kWh/m2] Total Energy Consumption EPI Savings (%) Unmet Hours Cooling Capacity (kW) Cooling Capacity (TR) Cooling Savings (%)

155.7

152.9

161.0

153.7

156.6

154.3

147.6

144.0

129.0 84.8

80.3

74.5

76.8

75.3

82.2

80.0

3.9

3.9

3.5

3.9

3.4

60.0

38.4

38.4

38.4

38.4

38.4

120.0

Further, the results derived helps in selection of appropriate energy conservation measure (ECMs) for optimizing the building energy use in terms of material availability, cooling load savings and cost.

Parameter

159.2

140.0 EPI (kWh/m2)

Here, crucial building blocks like wall, glazing, roof, etc. are eliminated one by one to understand the impact of each parameter on the model energy use and electricity consumption.

163.7

66.0

69.4

75.8

78.0

3.8

3.0

3.2

3.4

3.6

38.4

38.4

38.4

38.4

38.4

20.0

36.6

74.7

68.2

38.4

3.1 0.0

36.6

36.6

36.6

36.6

36.6

36.6

36.6

36.6

36.6

U value = 0.05 W/m2.K

SRI=0.01

U value = 0.05 W/m2.K

SRI=0.01

U value = 0.01

SHGC = 0.01

WWR = 0%

as proposed

ACH = 0

Elec. Light=0

Equipment =0

HVAC- off

Shading

Infilteration

LPD

EPD

HVAC

0.0

36.6 0.0

BAU

Wall

Roof

Interior Lighting

Wall U value = 0.05 W/m2.K

Window

Interior Equipment

Roof SRI=0.01

U value = 0.05 W/m2.K

Fans

Window SRI=0.01

U value = 0.01

112411.7 84.8 48592.3 36.6 50874.9 38.4 5138.6 3.9

106512.9 80.3 48592.3 36.6 50874.9 38.4 5162.8 3.9

98771.0 74.5 48592.3 36.6 50874.9 38.4 4580.9 3.5

101910.7 76.8 48592.3 36.6 50874.9 38.4 5109.5 3.9

99805.7 75.3 48592.3 36.6 50874.9 38.4 4539.1 3.4

109022.4 82.2 48592.3 36.6 50874.9 38.4 5016.8 3.8

217017.5

211142.9

202819.2

206487.4

203812.1

213506.4

163.7

159.2 2.7% 44.5 148.7 42.3 1%

152.9 6.5% 17.5 135.9 38.6 12%

155.7 4.9% 10.0 145.3 41.3 7%

153.7 6.1% 98.0 127.3 36.2 19%

161.0 1.6% 58.5 154.6 43.9 1%

30.5 156.4 44.5

79.5

3.6

40.0

BAU

107.9

100.0

SHGC = 0.01

87564.4 66.0 48592.3 36.6 50874.9 38.4 3966.8 3.0

WWR = 0%

Cooling [kWh]

EPI

Shading

Infilteration

LPD

EPD

HVAC

as proposed

Air tightness = 0

Elec. Light=0

Equipment =0

HVAC- off

92044.9 69.4 48592.3 36.6 50874.9 38.4 4179.6 3.2

100521.4 75.8 48592.3 36.6 50874.9 38.4 4572.4 3.4

103462.0 78.0 48592.3 36.6 50874.9 38.4 4804.3 3.6

105366.1 79.5 0.0 0.0 50874.9 38.4 4805.0 3.6

90398.8 68.2 48592.3 36.6 0.0 0.0 4134.6 3.1

0.0 0.0 48592.3 36.6 50874.9 38.4 0.0 0.0

190998.4 195691.8

204561.0

207733.4

161046.0

143125.7

99467.2

154.3 5.7% 0.0 135.1 38.4 14%

156.6 4.3% 16.0 144.8 41.2 7%

129.0 21.2% 35.5 147.4 41.9 6%

107.9 34.1% 37.0 78.7 22.4 50%

74.7 54.3% 2891.0 155.1 44.1 1%

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

144.0 12.0% 56.5 118.3 33.6 24%

147.6 9.8% 43.5 126.1 35.8 19%

32

Cumulative ECMs 180.00

163.65

160.00

162.29

150.08

147.73

Energy Conservation Measures Fig: IMAC set point temperature for different months

141.09

EPI (kWh/m2)

140.00 120.00

123.63 84.77

83.41

71.78

68.05

100.00

66.11

80.00

3.87

3.81

3.25

3.10

3.00

60.00

38.36

38.36

38.36

38.36

33.41

36.64

36.64

36.64

36.64

36.64

0.00

BAU

2.84

2.78

6.23

30.85 2.45

33.41

33.41

33.41

40.95

15.11

15.11

15.11

10.77

SHGC: 0.29, VLT: 62% U-Value: 1.77 W/sqm K

5 STAR

ECBC Super - LED Lighting

Daylight Sensors

VRF

Wall SRI

Roof SRI

Window SHGC + Shading

EPD

LPD

Daylighting control

HVAC System

Parameters

Interior Equipment

Wall SRI

Fans

Cooling

kWh kWh kWh kWh kWh kWh/m2 % hrs kW TR % %

Floating Temperature

As-Is set point Proposed set point Month temp (⁰C) temp (⁰C) Jan 24 27 Feb 24 28 Mar 24 28 Apr 24 29 May 24 30 Jun 24 30 Jul 24 30 Aug 24 29 Sep 24 29 Oct 24 29 Nov 24 28 Dec 24 28

EPI

Roof SRI

Window SHGC + Shading

95

SHGC: 0.29, VLT: 62% U-Value: 1.77 W/sqm K

BAU 60

Cooling Capacity Savings Percentage reduction

46.77

95

Units

Cooling Capacity

61.33

60

Interior Lighting

Cooling Interior Lighting Interior Equipment Fans Total Energy Consumption EPI Savings Unmet Hours

106.49 86.45

62.68

40.00 20.00

117.79

EPD

LPD

5 STAR

ECBC Super - LED Lighting

Daylighting control

HVAC System

Daylight Sensors

VRF

Floating Temperature

112411.68 48592.32 50874.89 5138.58 217177.24 163.65 0% 30.5

110616.07 48592.32 50874.89 5054.77 215296.47 162.29 1% 32.5

95186.35 48592.32 50874.89 4304.28 199104.62 150.08 8% 15.5

90242.81 48592.32 50874.89 4106.74 193959.81 147.73 10% 0

87676.02 48592.32 44300.68 3984.92 184690.10 141.09 14% 0

83127.21 20037.53 44300.68 3770.28 151346.90 123.63 24% 0

81338.51 20037.53 44300.68 3686.02 149472.59 117.79 28% 0

62023.6 20037.53 44300.68 8265.84 134722.93 106.49 35% 0

40906.49 14289.09 54300.68 3245.76 112824.59 86.45 47% 0

156.4 44.5 0% 0%

152.4 43.3 3% 3%

126.0 35.8 19% 19%

106.5 30.3 32% 32%

103.7 29.5 34% 34%

99.0 28.2 37% 37%

97.2 27.6 38% 38%

97.2 27.6 38% 38%

97.2 27.6 38% 38%

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

33

FINAL RESULT The project analyses the given base case building and aims to propose a building at par with ECBC 2017 prescribed case

PTAC (COP-2.5)

112411.7 48592.3 50874.9 5138.6 217017.5

ECBC

PROPOSED

VRF (COP - 3.02)

VRF (COP - 4.09)

76731.1 48045.1 50267.5 12383.7 187427.4

40906.5 14289.1 50874.9 3989.1 110059.6

163.7 0.0 30.5

143.7 12.2% 8.5

86.5 47.2% 0.0

1326.2 936.8

1326.2 936.8

1326.2 936.8

Cooling Capacity (kW) Cooling Capacity (TR) Cooling Capacity Savings

156.4 44.5 0

147.8 42.0 6%

97.2 27.6 38%

Sensible Cooling Load (kW) Sensible load reduction (%) Latent Cooling Load (kW) Latent reduction red (%) Peak cooling load (kW) Percentage reduction (%)

118.8 ~ 17.1 ~ 136.0 0.0

112.9 6% 15.6 2% 128.5 7%

70.0 49% 16.7 0% 86.7 49%

Total Area (m2) Conditioned area (m2)

BAU vs ECBC vs Proposed case 0.9 0.8

180.0 163.7

160.0 143.7

0.7

140.0

38%

0.6

120.0

0.5

100.0 86.5

0.4

80.0

0.3

60.0 47.2%

0.2 0.1 0.0

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

40.0

6%

20.0

12.2%

0.0

0.0 0 PTAC (COP-2.5)

VRF (COP - 3.02)

VRF (COP - 4.09)

BAU

ECBC

PROPOSED

EPI Savings (%)

Cooling Capacity Savings

EPI

34

EPI (kWh/m2)

EPI Savings (%) Unmet Hours

BAU

Savings (%)

Parameter HVAC System Cooling Interior Lighting Interior Equipment Fans Total Energy Consumption

ECMs Cost Parameters

Units

kWh/m2

EPI

Wall SRI

Roof SRI

EPD

LPD

SHGC of Glazing with shading (Fixed VLT-60% as per Daylight and shading analysis)

60

95

5 STAR

ECBC Super

0.29

162.29

151.13

157.14

147.25

HVAC VRF (COP:4.68)

153.68

143.9

VLT: 62% U-Value: 1.77 W/sqm K Material Assembly & Specs

4 mm ABC Cool 2 mm Cool Roof coat + 230 mm thk Paint + 200 mm thk Brick wall RCC slab

5 STAR

LED Lighting

Double Glazed Unit (outer: 6mm with coating Face 2 - 12mm Air Gap - inner 6mm Clear)

LG MULTI IV ARUN560LTE4

Company

ABC Cool coat

Cool Roof Paint, SRI - 122

Saint Gobain - Planitherm: Mint Green (PLT TG)

LG VRF

Cost + GST

₹ 280

₹ 350.0

₹ 2,200

₹ 50,000

Per Unit

per liter

per liter

per sq. m.

per sq. m.

Area of Surface

1086.7

524.4

325.4

Per Unit

sq.m.

sq.m.

sq.m.

Total Cost

₹ 6,086

₹ 3,671

₹ 715,880

SUYASHI SRIVASTAVA BE4001 – WHOLE BUILDING DESIGN

₹ 50,000

35