Green Journey of Infosys - NZEB...Tie-ups with NREL, ISES, IIT Bombay and IISC, Bangalore for...
Transcript of Green Journey of Infosys - NZEB...Tie-ups with NREL, ISES, IIT Bombay and IISC, Bangalore for...
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Green Journey of InfosysHigh performance with low environmental impact & low cost
Guruprakash Sastry
Regional Head – Infrastructure / Green Initiatives
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Infosys Sustainability
Journey
1. Define unreasonable goals
2. Focused team of experts for driving initiatives
3. Innovations in infrastructure
4. Demonstrate commercial viability for each initiative
5. Measure performance continuously
Data driven new designs
Data driven retrofits
6. Success stories
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16%
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Impact on energy bills &
Carbon footprint reduction
Savings of
2 Billion kWh of electricity
Savings of
$200 Million in electricity bills
1.7 Million Tons of CO2
emissions avoided
45+ Million square feet
across India
Increase in No. of
employees in India
since 2008
Absolute Increase in
energy consumption
since 2008159%
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New Ultra
Efficient
Buildings
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EPI of building - less than 75 kWh/m2/year
HVAC Goal Lighting Goal Water Goal
Max envelope heat gain 0.75 W/sqft
Total building @ 750-1000 sqft/TR
25 deg C, 55% RH
LPD of 0.45 W/sqft
90% of building to be day lit > 110 lux
No Glare throughout the year
Architects
Facade Specialists
IT Specialists
HVAC Engineers
Lighting Specialists
Architects
Facade Specialists
Lighting Specialists
Electrical Designers
PHE Engineers
Architects
Landscape Architects
Less than 25 LPD for office
building
Zero discharge
100% self sufficient
T
E
A
M
G
O
A
L
EPI: Energy Performance Index
Define clear goals
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Performance
Parameters in 2008-09
Building Energy (EPI):
200 kWh/m2/year
Average for software buildings
(incl. lights, AC, computers, etc.)
Lighting Design:
1.2 W/sqft
Average for software buildings
across campuses
AC Design:
350 sqft per TR
Average installed cooling capacity
across campuses
Electrical Design:
6.5 W/sqft
Total electrical load for software
buildings including chiller plant
* EPI – Energy performance index
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New design and
Performance Benchmarks in 2018-19
Building Energy (EPI):
75 kWh/m2/year
Average for software buildings
(incl. lights, AC, computers, etc.)
Lighting Design:
0.50 W/sqft
Average for software buildings
across campuses
AC Design:
750 sqft per TR
Average installed cooling capacity
across campuses
Electrical Design:
3.5 W/sqft
Total electrical load for software
buildings including chiller plant
63% Lower
58% Lower
54% Lower
46% Lower
* EPI – Energy performance index
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New Buildings
Practicing Energy Efficiency by Design
New buildings deliver an EPI of 75 kWh/m2/year
Building Shape &
OrientationInsulated Walls &
Roof
Ultra Efficient
system designSmart Building
Systems
Optimum Window-
wall ratioDay lit spaces with
efficient windows
Efficient technologies - Radiant
cooling is 30% more efficient
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Importance of building facade
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Importance of building facade
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New Buildings
Efficient Design at Lower Cost
• Campus based on sustainability principles from the concept design
• Efficient building facade avoids heat coming inside but lets in natural light
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Smart
Window Design
Day light pane
View pane
External shading
Smart glazing
Interior light shelf
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Impact of
Day Lighting
ImprovesEmployee health
& well being
Employee
Productivity
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Sl.
No.
System Description Units Conventional
practice
Efficient
design
Cost
savings in
INR Crores
Cost savings
in INR/sqft
01 Total electrical load MW 8.0 3.5 10 cr. 100
02 Transformer capacity MVA 10.0 4.5 1.0 cr. 10
03 DG set capacity MVA 12+2 4.5+1.5 12.0 cr. 120
04 HVAC system TR 2850 1350 3.0 cr. 30
05 Lighting system MW 1.2 0.45 1.5 cr. 15
06Annual energy
consumptionMillion kWh 25 8 10 cr. 100
Infrastructure required for 1 million sqft,
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Benefit of efficient design on capital cost
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Innovations
HVAC system
1. Dual loop chilled water system – 8 deg C and 16 deg C
2. All equipment on variable speed drives – chillers, pumps, cooling towers, air system
3. Low velocity design for entire system
4. Efficient equipment - Magnetic chillers
5. Automatic tube cleaning system
6. Use of free cooling (through cooling tower) – economizer
7. STP recycled water for cooling tower makeup
8. Chiller plant efficiency : 0.42 kW/TR (annual avg. for a building in BLR)
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Efficient cooling system
Radiant Cooling
30% more efficient than most efficient conventional cooling
Requires 75% less air compared to conventional system
Frees up valuable real estate space, less equipments
Higher thermal comfort
Highest indoor air quality, fresh air circulation
Cost same as conventional air conditioning
100
3525
0
20
40
60
80
100
120
Standard Air-conditioning
Efficient Air-conditioning
Radiant cooling
Cooling energy consumption (kWh/m2/year)
Radiant slab
Air-conditioning Radiant Cooling
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Efficient cooling system
Radiant Cooling
Radiant panels developed by Infosys team
High cooling capacity
Quick installation
Cost effective
Patent pending – Europe, US and India
Radiant panels
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Ultra Efficient Engineering
Collaboration with global experts / academia
High Performance
Design
Minimal bends and
pressure drop
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Deep Green
Retrofits
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Key Drivers for
Deep Retrofits
Energy Efficiency
Technology Upgrade
Visual Comfort
Acoustic Comfort
End of Life Scenarios
Thermal Comfort
Indoor Air Quality
Changing Business Needs
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Re-engineered chiller plants
(Conversion to variable primary systems – 40 Central Plants)
Before Retrofit After Retrofit
Reduction in Energy
30%
Reduction in no. of Equipment
45%
Reduction in space
25%
Reduction in Maintenance Costs
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Data Centers: Cold aisle containment and
DX to chilled water conversion
Converted to water-cooled,
chilled water based system
– 50% reduction in energy
Cold aisle containment for
existing data centres
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Replacement of
Electric heaters/steam boilers with heat pumps
Air source heat pump, draws
heat from atmosphere
3.5 times more
efficient than electric
heating
2 MW of connected
load reduced across
campuses
550kL savings
in annual diesel
consumption
1kW electricity Electric Water Heater 0.95 kW of heating
1kW electricity Heat Pump 3.5 kW of heating
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Achievement on
Energy Efficiency
297
266
239 230
203
178167 160
150 145 139 133
0
50
100
150
200
250
300
350
2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 2017-18 2018-19
Mo
nth
ly C
on
su
mption
in K
WH
/ E
mp
loye
e
On account of both – New buildings & retrofits
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Smart
Campuses
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Sustaining Performance through
Remote Performance Mgmt.
Review & Optimization of
Infosys Central Command Center
Thermal Comfort Indoor Air Quality Energy and Water use
Renewable Energy Building Assets Critical Operations
Central Utilities Alerts & Diagnostics Safety & Security
Optimizes operations across 16 Infosys campuses/ 26 million sqft in India
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Latest Data
Centers
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Ultra high efficiency
with Power UE of 1.12
Air entry at
room
temperature
Room neutral
air exiting the
RDHx coil
Cooling coil is positioned to
remove heat as soon as it is
produced by the server
Global average PUE of data centers is 1.8*
Best data centers in the world deliver a PUE of
about 1.08 (Facebook, Google) under cold
climate (Scandinavian countries)
We designed DC with a PUE of 1.12 at
Bangalore. Currently operating at about 1.18,
at partial loading
Uses free cooling from cooling towers
Unique Rear Door Heat Exchanger technology
Air entry Room Temperature- 27deg C
Air Exiting- 24deg C
*PUE – Power Utilization Effectiveness
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Renewable
Energy &
Green Power
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Green Power and
Renewable Energy
Currently 46% of our electricity is sourced from Green Power sources *
19 MW of captive roof top as well as ground mount installations
Commissioned 30 MW offsite Solar PV plant in Karnataka
In-house lab setup to test various PV technologies under same weather conditions
Tie-ups with NREL, ISES, IIT Bombay and IISC, Bangalore for research and innovation in Solar PV design, installation and operation
Infosys is the first Indian company to join
RE100 initiative in May 2015
100% Green Power by 2020
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Water
Management
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Water Efficiency by design
New Buildings
Software Development Blocks 25 liters/person 45 liters/person 45%
Food Courts 40 liters/seat 70 liters/seat 43%
Employee Care Centers 90 liters/person 135 liters/person 33%
Shower 6 liters/min 12-16 liters/min 50%
Taps 1.9 liters/min 6-9 liters/min 68%
Water Closet 3-6 liters/flush 6-9 liters/flush 50%
ImprovementInfosys Design
StandardsBuilding Type National Building
Code/UPCI
Specify flow rate along with design of fixtures
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Water Conservation in
Buildings
End Use Consumption Strategies
Low flow fixtures – Taps, Shower
heads, Health Faucets
Pressure Compensating Aerators
(PCA)Sensor controlled taps
Pressure regulating valves at
buildings
Landscape retrofits, Native
plantation
Root zone irrigation Employee awareness campaigns
Dual flush system
Artificial Grass at
Infosys MysoreSmart water metering
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New Buildings/Campuses Existing Buildings/Campuses
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Water Recycling
100% of waste water is recycled and reused
100% of waste water is recycled
Efficient treatment technology - Membrane bio-
reactor (MBR) technology
Recycled water is used for irrigation, flushing and
air-conditioning
Retrofits to upgrade treated water quality in
line with new CPCB norms
Retrofits to reduce waste water treatment
cost
Dual piping system retrofits in existing buildings
100% Waste Water
from buildings
Sewage Treatment Plants
(STP)
Flushing
Irrigation
Air-conditioning
100% REUSE
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Rain water harvesting
Harvest 100% of on-site rain water
Natural and Artificial
lakes/ponds on campus to
harvest rain water
Roof top rain water
harvesting systems (New &
retrofits)
Deep well injection
system to recharge
ground water
35 lakes across campuses in India Roof top rain water harvesting 350+ deep well injection systems
(Holding capacity of ~330 million liters) (Recharge capacity of 17.5 million liters per day)
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3.28 3.3 3.32
3.07
2.47
2.17 2.15 2.21
1.921.77
1.411.31
0
0.5
1
1.5
2
2.5
3
3.5
4
2007-08 2008-09 2009-10 2010-11 2011-12 2012-13 2013-14 2014-15 2015-16 2016-17 2017-18 2018-19
Mo
nth
ly C
on
su
mption
in K
L / E
mp
loye
e
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Achievement on
Water Efficiency
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Waste Management
Zero waste to landfills
Organic Waste
To be treated on campus
100% on-site treatment
of food waste
9 Automated biogas
producing 6800 LPG
cylinders/year
8 Composting plants
producing compost 400
tons/year
In-organic, Non-
Hazardous waste
To be recycled
Recycled through
authorized vendors
2400 Tons/year of waste
recycled
Treated through PCB
authorized vendors
500 Tons/year of
recyclable waste sent to
authorized recyclers
Hazardous waste
To be treated by certified recyclers only
Achieved 85% waste diversion from Landfills
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Achieving Sustainability in
Physical Infrastructure
1. Question every assumption
2. Push the boundaries
3. Use of technology
4. Focused efforts
5. Turn challenges to opportunities
6. Measure data, Monitor performance
Thank youFor more info: https://www.infosys.com/sustainability/Documents/infosys-
sustainability-report-2018-19.pdf