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