1 Retrofitting Mahindra Towers Case Study – Mahindra and Mahindra Limited 21 st November 2015
1
Retrofitting Mahindra TowersCase Study – Mahindra and Mahindra Limited
21st November 2015
2
About Mahindra Group
A USD 16.5billion Multinational Group in business for over 70 years
Employs over 200,000 people
Presence in over 100 countries and 18 key industries
In 2014, Mahindra featured on the Forbes Global 2000
Tech M listed in DJSI 2015 World Index. M&M Ltd., Tech M and Mahindra Finance listed on DJSI-Emerging Market Index
Tech M (100), M&M(98) and Mahindra Finance(92) in CDLI by CDP
3
Building and Location Mahindra Towers, Worli, Mumbai
Construction year 1985 - 1992
Building area 18,430 square meters (198,277 sq. ft)
Occupancy 1380 people
Number of wings and floors 2 wings : A Wing – 6 floors and B Wing – 7 floors
Mahindra Towers, Worli, Mumbai
The building was constructed in line with all prevailing norms and engineering
standards in 1992.
In 2009, it was decided to go for Retrofitment to use the modern techniques
in ‘Energy Conservation’ and save energy.
4
Retro fitment Project
Walk through audit from ESCO
(2 days, free of cost)
Report on type of renovations, investment
and Payback period
Issuance of‘Letter of Intent’
Detailed energy audit 4 to 6 weeks with
actual measurements
Project implementation
Measurement and Verification (M & V)
1 2 3 4
67
Contract with Payback period &
sharing guaranteed savings
5
Retrofit Started: March 2009
Retrofit Completed: July 2009
Retrofit financing: ESCo Model of Shared Savings
ESCo selected: ENCON Energy Management Services Pvt. Ltd
5
Energy Conservation Measures
Recommended by ENCON
Identified efficiency opportunities as an outcome of energy audit based on
building performance:
Electrical system: Optimize metering, power frequency stabilization, and
reduce power losses.
Lighting: Upgrade to efficient lamps and improve illumination.
Heating, Ventilation, and Air Conditioning (HVAC): Reduce heat transfer,
improve motor efficiency, automate chillers, and replace pumps in cooling
towers.
ENCON prioritized the ECMs on the basis of payback period as well as
impact on worker productivity and building aesthetics.
ECMs with a simple payback period (initial cost divided by annual energy
cost savings) of 12 months were implemented first.
Mahindra’s utility bills for a particular month in the preceding two years to
calculate base line and arrive at savings accrued post retrofitment
6
1890000
4073310
Overall Cost of Retrofit Savings from Energy inFirst Year
Co
st
in R
s.
Result of Retro fitment Project
Energy Efficient
Measures
Cost in Rupees (USD)
Lighting System Rs. 14,20,000 ($29,583)
HVAC System Rs. 4,70,050 ($9,792)
Electrical System Rs. 0 ($0)
Total Rs. 18,90,000 ($39,375)
Payback period < 6 months
Av. consumption dropped by
59,207kWh per month
Eq. CO2 saved 36.6 Tons/month
7
Magnetic Induction Lamps in parking
areas
Efficient AHU and VFDs
Roof top solar PVs
LED lights in building
Waste Management – converting
paper waste in to writing pads for
meetings
IGBC Certified Green Existing Building
BEE 5 Star rating
Rain Water Harvesting and use in
cooling towers for A.C.
Projects completed post retrofit Way Forward
The Journey Continues …
Before
70W Metal Halide Lamp
After
40W Induction Lamp
Mahindra Insurance Brokers Ltd:
ADDRESSING THE ENERGY CHALLENGES THROUGH ESCO MODEL
Case Study – 2
Project : LED REPLACEMENT
• Identified Concern : High cost of Electricity for MIBL Office
• Prime contributor : Lighting
• Solution : Replace existing lights by LEDs
• Decision to use ESCO Model of shared savings
• ESCO - Sipani Energy Ltd., Banguluru
• No investment by MIBL in LED Replacement
• Agreement : Share 70% Saving from electricity bills with Sipani for next 3 years
• Free replacement in case of any breakdown for a period of 3 years
LED Replacement
ExistingFittings
Total Number
Spec Power
W
Connected Load
Replaced by
Spec Power
W
Reduction in Load
(KW)
Savings (KWh/M)
4x18 W FTL with Choke
107 92 9.84 LED SQUARE-35 W
35 6.10 1342
2X18 W PL
203 45 9.14 LED 15 W DL-DN-192i
15 6.09 1340
Results and Benefits
• Total Investment by
ESCO: Rs. 11,01,285
(incl. taxes)
• Annual Savings :
Rs. 4,50,505
• Annual Savings in
electricity : 32,184 kWH
12
Thank you