energy performance of indian commercial buildings · 4 & 5 star hotels (279) multi specialty...
TRANSCRIPT
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Energy performance of Indian Commercial buildings
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Outline
• What is energy performance index for
commercial buildings
• Commercial building energy performance
– ECO-III Benchmarking study
– IGBC rated buildings
– BEE star rated buildings
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What is energy performance index for commercial buildings
Source: BEE Star rating for Office Building & BEE Star rating for BPO
Main Meter
Renewable electricity
Grid Electricity
DG Electricity
Built-up area (m2)
Energy Performance Index (EPI) (kWh/m2.y) =Annual Grid Electricity + Annual DG Electricity
Built−up area
✓
✓
Total electricity
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EPI of Commercial Building (2011)
Source: ECO-III Study on “Energy use in commercial buildings – National benchmarking study” (2011)
149
349
115
258
141
88
378
279252
One Shift Office Buildings (149)
Three Shift Office Buildings (349)
4 & 5 Star Hotels (279)
Multi Specialty Hospitals (378)
Shopping Malls (252)
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EPI of Office Buildings
Sources:- ECO-III Benchmarking study- IGBC rated buildings- BEE star rated buildings
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BEE Star Rating for office building
180
155
130
105
80
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EPI of IGBC rated office buildings
Do not qualify for BEE star rating
Do not get good BEE star rating
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EXAMPLES OF ENERGY EFFICIENT OFFICE BUILDING
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Institute of Rural Research and Development (IRRAD), Gurgaon
• Day-use office building• Built-up area: 7069 m2
• EPI: 48 kWh/m2.y
Source: Ashok B Lall Architects
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Infosys, SDB 1, Pocharan Campus, Hyderabad
• Day-use office building• Built-up area: 11,600 m2
• EPI: 86 kWh/m2.y
Source: Infosys (2011-12 data)
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Infosys Journey towards Energy Efficiency
Source: Infosys
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BPO BUILDINGS
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Performance indicator for BPO
• Annual Average hourly Energy Performance
Index (AAhEPI) (Wh/h.m2)
AAhEPI (Wh/h.m2) =EPI (kWh/m2.y) x 1000
Annual hours of operation
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BEE Star Rating for BPO building
35
30
25
20
15
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Performance of BEE Star BPO Buildings & IGBC rated Tech Parks
Do not qualify for BEE star rating
Source: BEE Star rating of BPO buildings (2011 data) & IGBC rating for Tech Parks (2012 data)
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Summing up
• Green rating may not be sufficient to ensure energy efficiency in the buildings
• Need for absolute benchmarking for energy performance– Type of building
– Performance indicator (AAhEPI OR EPI)
• Start with high energy performance benchmarks (e.g. BEE 5-star rating OR best energy efficient buildings)
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THANK YOU !