Saving Money and Energy Energy Efficiency Retrofit of

Saving Money and Energy Energy Efficiency Retrofit of Godrej Bhavan

Anjali JaiswalDirector, India Initiative Natural Resources Defense Council (NRDC)

26 October 2013

About NRDCAccelerating Building Energy Efficiency in India

• ASCI-NRDC work in partnership with business and government leaders to accelerate energy efficiency in buildings

• Partner with real estate developers, financial institutions, andnational and local government to promote building efficiency

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About NRDCAccelerating Building Energy Efficiency in India

NRDC and ASCI partner with key stakeholders to promote building efficiency

•Real Estate Developers: Bringing leaders within the developer community to champion energy efficiency

•Financial Institutions: Opening a dialogue on developing financial products for efficiency

•Local and National Governments:Accelerate the momentum to promote efficient construction by addressing larger market share

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About NRDCMaking the Business Case for Energy Efficiency

• Reports: mapping stakeholder opportunities for the real estate sector, outlining action steps for real estate developers, local governments, and financial institutions

• Case Studies: materials and case studies showcasing details of energy efficiency in leading buildings

• Factsheets: resources for saving money for building owners, managers and tenants

Presentation to CREDAI Board

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Our ApproachWorking in partnerships on clean energy and climate change

Our Partners Our Collaborators

Real Estate Developer Workshop on Building Efficiency in Ahmedabad, December 2012


Does Energy Efficiency Actually Save Money?


Does Energy Efficiency Actually Save Money?Key Study

Findings

Electricity costs:

down by 28 %

Total electricity:

usage down 12 %

Costs recouped:

as little as 4.7 yrs.

Potential 15 yr.

savings of

6,980,000 Rs

Godrej BhavanBuilding Basics

Saving Money and Energy: Godrej Bhavan Case Study 9

Location Fort, South Mumbai; constructed in 1972

Building area 3,826 square meters (41,185 square feet)

Air-conditioned area 2,192 square meters (23,595 square feet)

Non air-conditioned area 1,634 square meters (17,588 square feet)

Number of floors 2 basements, 6 floors, and a rooftop terrace

Building use Office space

Retrofit completed 2010

Building owner Godrej & Boyce (not leased)

Retrofit financing Self-financed by Godrej & Boyce

Project team Godrej’s Green Building Consultancy Service, Ingersoll Rand

Utility company BEST (11 kV power via two 250 kVA distribution transformers)

Godrej BhavanEnergy Saving Measures


Area Building Management System

Key Measure� Installed Trane Building Energy

Management System (BMS) dashboard display with digital energy meters

� Upgraded the incoming and outgoing electrical systems for high-voltage electricity to provide greater building safety, reliable operations

� Upgraded the building’s low-voltage system to facilitate metering of the building’s electricity load



Area HVAC System Upgrade with BMS Integration

Key Measure� Replaced inefficient Direct Expansion (DX)

HVAC system to new Trane system with a screw chiller, water-cooled condenser, electronic expansion valve, and a high coefficient of performance (COP) of 5.5

� Upgraded cooling tower with temperature controller, and variable water pumping to increase energy efficiency

� Installed air-handling units with variable frequency drives and humidity control for each floor



Area Lighting

Key Measure� Installed Philips fluorescent tube lamps with

high- efficiency T-5 fittings (lamp life of 27,000 burning hours and a low mercury content of 1.4 mg per tube) and electronic ballasts with timers to switch office lights off automatically after hours

� Provided natural day light and outside views throughout the building

� Installed double-glazed clear windows and shading devices to reduce heat gain through the windows while still providing light (installed in 2012 after the building retrofit)

Godrej BhavanEnergy-Efficient Retrofit Component Costs


Energy-Efficient Measures and Audit Cost (INR)

HVAC system replacement(including the building energy management system)

5,000,000

Water flow meters 24,000

Energy metering system 52,000

Auto-blow down controller at the cooling tower 29,000

High reflectance paint for the terrace surface 62,000

Energy audit 45,000

Replaced lights with energy efficient tube lights 172,000

Total cost of installed energy efficiency measures 5,384,000

Godrej BhavanRecovering Investment via Energy Savings

• 11.4% energy savings from retrofit in first year

• Simple payback period of 4.7 years

• Major energy savings derived from HVAC, lighting and building maintenance systems


Annual Energy Cost and Energy Consumption

Godrej BhavanRetrofit Challenges and Solutions

ChallengeAgeing building with ongoing operations

Solution � Implementation during non-

working hours

� Simultaneous operation of old and new systems during retrofit


Limited availability of energy efficient products

� Sourcing through special venders through investigation and research

Godrej BhavanLessons for Similar Projects

• Godrej Bhavan’s upgrade demonstrates the real energy and cost savings from implementing energy efficiency in existing buildings

• Commitment starts at the top: Godrej’s corporate commitment to sustainability shaped the project’s efficiency goals. Top-level support for the high-efficiency and cost-savings targets are critical

• Low-hanging savings opportunities: HVAC, lighting, and building management systems are low-hanging energy and cost-saving opportunities

• Building operations and maintenance are key: Beyond installing efficient equipment, train staff to continually analyze energy performance, transforming building operations, correct discrepancies and increase energy savings


NRDC-ASCI Building Efficiency Case Studies

Dissemination Is Essential

•Retrofit Example - Godrej Bhavan Upgrade

•New Building - currently modeling and analyzing

•ESCO Model – in development


Thank you!

Natural Resources Defense Council

www.nrdc.org/international/india

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Energy Conservation Building Code


Energy Conservation Building Code

• A set of standard energy efficiency measures

• Save 1.7 billion kWh of electricity in India annually

• Applicable to commercial buildings, offices, hospitals, IT parks, and high-rise residential buildings

• Applicable to buildings with loads larger than 100 kW or 120 kVA

• LEED, GRIHA, and other green building rating systems must meet ECBC standards at a minimum


Source: Rawal et al. 2012

Current Progress on ECBC

• Voluntary at national level

• Champions states for ECBC adoption so far are Andhra Pradesh, Rajasthan, Orissa, Delhi, Maharashtra, Uttar Pradesh, Haryana, Tamil Nadu, Karnataka, and West Bengal

• Karnataka is using a phased approach in implementation, applying ECBC to government buildings in Phase I

Source: United Nations Development Program (2011)

21Saving Money and Energy: Godrej Bhavan Case Study

Documents

Saving Money and Energy Energy Efficiency Retrofit of