larsen toubro pel dept powai
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LARSEN & TOUBRO
Presentation for the
Energy Efficiency Award 2012
CII , Hyderabad
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OUTLINE
1 • Profile in
brief
2 • ENCON – Evaluation & Details
3 • Benchmark & future roadmap
4 • Green Initiatives
5 • ENCON Management
6 • Awards & Accolades
• Summary7
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Profile
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Diversified Engineering Business
ECC E&C Projects HEIC Power
EAIC MIPD Infotech
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NB – II Profile
Year of Built 2007
Gross Floor Area,
Sq.Mtrs. 21261
Installed Trafo.
Capacity, kVA
3200
Connected Load, kW 2126
Air‐Conditioning
Plant Capacity, TR 834
Occupants 1500
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Energy Consumption Pattern
19%
8%
21%
51%
1%
Power Lighting UPS AC Lift
2009‐10 2010
‐11 2011
‐12
29.26
29.58
27.75
Annual Lac KWH for NB‐II
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ENCON –
Evaluation & Details
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Sr.
No.
Title of Energy Saving project
implemented during last 3 years
Annual Electrical Savings
achieved
Invest.
Made Payback
YearsUnits Rs Rs
1 Switching
off
of
Primary
Pump
on
AC
System 26460 174636 0 0
2 Replaced Secondary pump with reduced
Capacity 90080 594528 74000 0.12
3 4 nos. of VFDs for AHUs 38740 255684 175000 0.68
4 Modification to ducting 312000 2012400 1500000 0.75
5 16 nos.
of
2X11W
CFL
light
fittings
8223 61015 73600 1.21
6 15TR Precision AC during night loads 121200 899304 1400000 1.56
7 1799 nos T5 3X14W light fittings 276111 1814051 3877100 2.14
8 29 nos. of 12W LED lights 6090 45188 99180 2.19
9 200 nos. Occupancy Sensors 60000 387000 1000000 2.58
10 1290 nos. 6W LED light fittings 83850 540833 3483000 6.44
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ENCON Financials
0
10
20
30
40
2009‐
10 2010‐
11 2011‐
12
38.83
17.7311.29
Savings in
Lac
Rs.
p.a.
0
20
40
60
80
2009‐
10 2010‐
11 2011‐
12
76.78
21.52 18.52
Investment in
Lac
Rs.
0
1
2
2009‐10 2010
‐11 2011
‐12
1.98
1.211.64
Payback in years
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Summary of ENCON financials
Investment
Rs. 116.82
Lacs
Savings
Rs. 67.85 Lacs
Payback
1.72 years
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ENCON in Lighting
LED Lights
3x14W T5 Lights
Occupancy
Sensors
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ENCON in Air‐conditioning system
VFD
BMS
Duct
Modification
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Other ENCON Measures
CFL
Street
Lights EMS
Timers
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Energy saving project
Existing system : ‐ Water cooled Precision AC
Avg consumption on a
working day : 600 kWh
Avg consumption on a
holiday : 500 kWh
Hence,
Annual Consumption
is
: 213000 kWh
New system : ‐ Air cooled Precision AC
Avg consumption on a working day
(15 TR X 1.2kW X 12 hrs) : 216 kWh
Avg consumption on a holiday
( 15 TR X 1.2kW X 24 hrs) : 432 kWh
Hence,
Annual Consumption
is
: 91800 kWh
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Thus, annual
savings
come
up
to
: 1,21,200
kWh
Annual Savings in Rs. : 9,09,000/‐
Total Investment in Rs. : 14,00,000/‐
Hence, Payback period is : 1.5 years
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Reporting the completion of planned ENCON measures
Sr.No EC Activity
planned Investment
in Lac Rs.
Annual Savings Status
Units Rs in Lacs
1 Replacement of staircase
emergency 2X18 W light fittings by
9W LED
light
fittings
0.96 6832 0.52 Completed
2 Replacement of 150W MH st light
fittings by 22 W CFL light fittings 0.9 8611 0.64 Completed
3Voltage
reduction
of
Electromiser
from 210V to 200V for lighting
control.
Nil 25000 1.87 Completed
4 Stopping of central AC plant after
office hours
Nil 90000 6.75 Completed
5 Removal of 2 X 160KVA main UPS 2.5 55000 4.12 In process
6 Provision
of
easy
access
to
staircase to optimize usage of lifts 1800 0.13
Dropped
due to civil
constraints
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Benchmark &
future roadmap
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Benchmark ‐ BEE StandardsClimatic Zone ‐ Warm and Humid
EPI (Kwh/sqm/year)
Star Label
200‐175 1
Star
175‐150 2 Star
150‐125 3 Star
125‐100 4
Star
Below 100 5 Star
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Energy Performance Index
125
130
135
140
145
150
2009‐
10 2010‐
11 2011‐
12
147.34
137.68
134.08
Reduction in EPI by
9% over
last
3 years
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Yesterday
147
Today
134
130
by 2013
125
by 2015
Our Objective ‐ EPI by 2015
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EC Plan for 2012
• Study of building envelope for heat calculations
‐ Use of heat retardant paints
‐ Arresting AC leakages
‐ Thermography
• Heat recovery wheel for Auditorium
• Feasibility study of Solar PV system on terrace
of the
building.
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Making NB-II
a GREEN Building
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• Supplier = M/s. Enercon India
• Installed Capacity = 9.0 MW
• Location =
Satara, Maharashtra
•
Agreed
Supply
=
150Lac
Units
per annum
• 5% concession in Utility bill
FY Wind Energy
(Lac kWh)
%
E
Green
nergy
2008‐09 21.48 63.82
2009‐10 14.11 48.26
2010‐11 14.79 51.30
2011‐12 18.28 65.87
Green Energy at NB‐II
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GREEN initiatives at NB‐II
•
Use of
manure
generated
from
Bio
‐gas
plant
for
gardening
&
horticulture activities
• Sewage Treatment Plant – Zero water Discharge
• SANKALP notepads made out of one‐side used papers
• Indoor air quality monitoring carried out.
• LEED Certification process for prestigious Green Gold Rating ‐
Documents submitted.
• Exploring GREENCO rating ( developed by CII ) for Powai
Campus .
• Exclusive carbon
foot
mapping
of
NB
‐II
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ENCON Management
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“Energy Expo 2011” at NB‐II
R hi t t S i t f ENCON
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Reaching out to Society for ENCON awareness
Prizes distribution by Mr.Rajdeep Gupta to Students
EC Awareness talk conducted at Municipal School
Mrs. Preeti Shah from PCRA delevering lecture
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Awards
&
Accolades
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Let’s Summarise….
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• Investment of 116 Lac Rs. to achieve 68 Lac Rs. of
recurring savings
• Energy Performance
Index
improved
from
147
to
134
•
Objective
=
5‐
STAR
rating
for
the
building
• “LEED” Certification & “GRRENCO” rating
• Energy Conservation – A Management Objective
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