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ENVIRONMENTAL PERFORMANCE
 
Environmental Management
Energy Savings Initiatives
 
Retrofitting Mahindra Towers for Energy Efficiency
 
 
To address Climate Change is to adopt sustainable development. India set on a mission to combat climate change in June 2008 that includes reduction of emission, use of solar power, water management and energy conservation.
Buildings today account for 40% of the world's energy use. Most new buildings are built with the environment in mind, but the real key to substantial progress is reducing existing building energy consumption and carbon footprint.
At Mahindra, we initiated retrofitting Mahindra Towers, Worli - Mumbai to cut energy consumption in December 2008.
The BEE certified Energy Services Company (ESCo) conducted energy audit of Mahindra Tower. Post the audit, 'Techno-commercial' aspects of all identified Energy Conservation Measures (ECMs) were discussed and an action plan was prepared. Only projects with simple pay-back of less than 18 months were selected for implementation. ESCo invested INR 15.90 Lac to implement the identified ECMs.
 
The Challenges
 
To maintain present norms of illumination level and temperature in air-conditioned areas.
To ensure that the aesthetics are maintained while replacing any equipment, fittings etc.
To identify and deploy desirable mix of technology and cost in view of the set pay-back period.
   
 
The Solution
 
The Energy Conservation Measures implemented at Mahindra Towers are as follows:
 
Optimisation of Electrical Distribution System for demand management and energy savings.
System optimisation of air-conditioning operation without changing the set chilled water and return air temperature. Optimisation of electrical system and air-conditioning plant that results in a saving of approximately 17,000 kWh per month.
In case of lighting, over 2,000 T-5 HE tube-rods with high-frequency, low-harmonic electronic ballasts were replaced in existing fittings. This change has resulted in a saving of approximately 11,000 kWh per month.
Sizing of AHU motors was reduced and motors of high-efficiency (Eff-1) were installed keeping the blower speed unchanged to ensure original air circulation.
10% reduction in monthly power consumption has been achieved. Overall pay-back period is less than a year.
   
 
The Impact
 
 
 
The retrofitting has affected an average savings of 36,185 kWh / month, the equivalent CO2 saved is 29.3 tonnes / month (In Maharashtra saving of 1kWh / month is equivalent to 810 gms of CO2).
This model of retrofitting will now be extended to other office buildings as well as manufacturing plants.
 
 
 
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