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CII 18th National Award for
Excellence in Energy Management - 2017
ICICI Bank Zonal Office Ambattur, Chennai
August 30 & 31, 2017
2
Ambattur Tower
Year of occupation 2008
Area 14307 Sq.M.
No. of floors G + 5
No. of work stations 2375
Air cooled chillers 3 x 263 TR
Diesel Generator 2 x 625 kVA
1 x 250 kVA
UPS 2 x 120 kVA
Transformer 1000 kVA
Total connected load 950 kW
3
Beginning of Journey
Description FY 2014
Annual consumption Lac kWh 18.44
Annual Cost Rs. Lac 206.70
EPI 206EPI needs
reduction
Systematic Approach – Energy Management Plan
Employee comfort is not compromised
Energy Audit
Eliminate Wastage
Optimise Capacity
Investment
Type of load Working
kW
HVAC 356
IT 40
Others /
Utilities /
Pumps
160
Lighting 60
Total 616
Energy Distribution Profile
5
Brainstorming and Action
Use less energy
Use energy efficiently
Use renewable energy
Active participation of
Employees and Facility
Managers
Road Map
• Identification – Power Crisis
• Energy Management
• Audit and Analysis
Step 1- Identify
2014
• Establish measurement systems
• Equipment optimisation
• Low investment projects
Step 2-
Consolidate & Synergise
2015
• Continue past initiatives
• Involve mass participation
• Alternate source of energy
Step 3 -
Institutionalise
2016
• Involving business partners
• Safe and sustainable workspace culture
• Giving back to society - CSR
Step 4-
Spreading
2017
7
UPS Optimisation
Units Savings:
15000 kWh / Yr
Primary UPS - 5x120 KVA
Battery Bank – 100AHx32x5
Charging battery – 100AHx32x3
Server UPS – 2x30 KVA
Battery Bank – 100AHx30x2
Before
UPS post optimisation - 2x120 KVA
Battery Bank – 100AHx32x2
After
8
DG Optimisation
Units Savings:
140000 KWh / Yr
Before
After
Office Hours DG – 1x 625KVA
9am to 6pm
Post office Hours DG – 1x625KVA
6pm to 9pm
Consumption – 300 KWh
Office Hours DG – 1x 625KVA
Post office Hours DG – 1x250KVA
Consumption – 120 KWh
9
Other ProjectsOptimisation of HVAC
Lighting control
Annual Savings:
20000 kWh
Annual Savings:
19000 kWh
Timing Control
Alteration of set points
Thermal performance/leakages
Filter cleaning/wet servicing
Total - 2145 2x2 40W CFL
De-lamped – 545
% de-lamped – 25%
Occupancy based lighting -
Cafeteria
10
FY 14-15 FY 15-16 FY 16-17
• Inverter AC
• LED Retrofit
• HVAC
Optimisation
• Reflective
Glass
• Day light
harvesting
• Roof Top Solar
• AC Installation
• STP Integration
• UPS
Optimisation
ENCON Projects - Investment
Investment:93 Lac
Savings:290000 kWh
Investment:0.5 Lac
Savings:19000 kWh
Investment: 5.10Lac
Savings:98000 kWh
11
LED Retrofit
Load Quantity Old
wattage
New
wattage
36W TL 141 5640 2820
2x18W CFL – Spot light 749 28462 11235
2x36W CFL – 2x2 fitting 2145 158730 85800
36W CFL – Street Light 36 1368 900
Total 3071 194200 100755
LPD improvement: 52%
Savings: 2.21 Lac KWh/Yr
Investment: 82.2 Lac
Payback: 30 Months
12
MonitoringOctober – 2015
DATE KWAH PF MD Units Consumption EB
units
DG
Units
EB &
DG
Units
Remarks
1900 2300 700
1 4313640 0.99 655 4620 50 560 5230 696 5926
2 4318920 0.99 655 670 120 590 1380 284 1664
3 4320350 0.99 655 3980 560 530 5070 459 5529 Training
4 4325470 0.99 655 420 200 700 1320 483 1803
5 4326850 0.99 655 4530 220 680 5430 1189 6619
6 4332360 0.99 655 3640 790 70 4500 1448 5948 RBH meet
Trends in energy consumption and operating pattern
Specific area of energy wasted
13
Optimisation - Air Conditioning
Inverter Star Rated ACs at
24x7 ATM and Control room
Eliminate additional load on chiller operations
Trainings extended beyond office hours / holidays
Dedicated ACs installed against 263TR chiller
5.5 TR x 1 – Duct
4 TR x 3 – Cassette
AC Replacement
Annual
Savings:
24000 kWh
Annual
Savings:
23000 kWh
Specific Energy Consumption
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
FY13-14 FY14-15 FY15-16 FY16-17
Carpet area (Sq.m.)
0
200
400
600
800
1000
1200
1400
1600
FY13-14 FY14-15 FY15-16 FY16-17
Total no. of employees
Area and manpower increased
0
50
100
150
200
250
FY13-14 FY14-15 FY15-16 FY16-17
206184 172 160
EPI
28%
Storage pit -Connecting
5 sumps
145000 Ltrs water collected
Used for gardening
Innovative Projects
Savings:
12 tanker water
Rain Water Harvesting Day Light Harvesting
Road map to achieve benchmark –
FY18
HVAC Retrofit
• Chiller pipeline replacement – 54.05 Lac
• Pumps and valves – 32.83 Lac
• Expected savings – 1.02 Lac KWh
Lighting Control
• Pulling chords
• Occupancy based lighting – Workspace
• Investment – 4 Lac
Façade Replacement
• Triple barrier semi-unitized structural glazing system
• Single glazed 6mm low heat glass
• U value – 3.85 W/Sq.m K
• SHGC – 0.45
Wind Solar Hybrid
• Clean and Green Power
• Leverage – Differential unit cost
• NIL Investment
Investment: 127 Lac
Estd. Savings: 1 Lac KWh
BEE Rating
Year Scope-I Scope-II Total
FY 2013 770.11 843.98 1614.09
FY 2017 109.60 1456.40 1566.00
GHG Inventory & certification
VC facility reduced air travel –
4000 employees per year
Reduction of CO2 emission -
48 Tons
Pollution control check –
employee vehicles
Elimination of fuel
transportation losses
19
Renewable Energy – Roof Top Solar
OPEX model
Capacity – 120 kWp
Annual Generation – 1.68 Lac
kWh (9%)
8% utilization during Peak hour
Average – 4.12 kWh per day /
KWp
CO2 Abatement 138 tons per
annum
Mitigates Urban Heat Island
Effect
Cost Benefit 3.8 Lac
for 6 months
Best Practices
High temperature resistant
Control carbon emission
Humidity absorbent
Life span > 150 years
Restoration of green cover
Drain line channelized to
centralized STP of CAAIIUC
Water recycled, used for
Gardening plants in Ambattur
Savings in motor operation -
7800 KWh/Yr
Neem Tree Plantation
STP Integration
Best Practices - Green Zone
Paper reduction
Inventory rationalisation
Image based processing
Waste paper recycling
Replacement of 950 desktops with Energy star
labeled desktops and laptops
Auto switch off - Monitors
Printer with duplex printing
Recycled printer cartridges
Multifunction devices: Printer-Scanner-Photocopier
Best Practices - IT Initiatives
70% reduction in energy consumption by efficient and
optimized equipmentPhotoc
Employee Training –
Involvement in Energy
Management activities
OEM/HK/Security Training -
Energy management
No cost
Awareness campaign
Training
Energy Savings through Behavioral change