Bureau of Energy Efficiency

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• Bureau of Energy Efficiency
• and
• Energy Conservation Building Code
• An Overview
• Shabnam Bassi
• Energy Economist
• Bureau of Energy Efficiency
• Government of India

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Energy Conservation Act, 2001

• Reduction of energy consumption using efficiency
  and conservation measures.
• Reduce the need to create new capacity thereby
  saving resources and green house gas emissions.
• Secure environmentally benign and sustainable
  growth
• Stimulate market transformation in favour of
  energy efficient products and appliances.
• Created Bureau of Energy Efficiency (BEE) as the
  nodal agency at the center and State Designated
  Agencies (SDAs) at the state level to implement
  the Act.

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Bureau of Energy Efficiency (BEE)

• BEE was set up in March 2002 under the provisions
  of Energy Conservation Act of 2001 to provide a
  legal framework for the governments energy
  efficiency initiatives in the country.
• The Bureaus mission is to develop policies and
  strategies with a thrust on self regulation and
  market principles with the primary objective of
  reducing energy intensity of the Indian economy.

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Bureau of Energy Efficiency (BEE)

• Develop and recommend to the Central Government
  norms for processes and energy conservation
  standards
• Develop and recommend minimum energy performance
  standards and labeling design for equipment and
  appliances
• Develop and recommend specific energy
  conservation building codes
• Recommend notifying any user or class of users of
  energy as designated consumers
• Take necessary measures to create awareness and
  disseminate information for efficient use of
  energy and its conservation

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Sectorial Energy Consumption
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Energy Consumption in the Commercial and
Residential Buildings
Residential buildings 116 billion units
Commercial buildings 33 billion units
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Building in EC Act 2001

• Building means any structure or erection or part
  of a structure or erection, after the rules
  relating to energy conservation building codes
  have been notified under clause (a) of section 15
  or clause (l) of sub-section (2) of section 56,
  which is having a connected load of 500 kW or
  contract demand of 600 kVA and above and is
  intended to be used for commercial purpose

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ENERGY CONSERVATION BUILDING CODE ECBC

• Bureau of Energy Efficiency
• Government of India

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Electricity Use in the Commercial Sector is
increasing !
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Background ECBC

• Comply with energy consumption norms and
  standards and/or to prepare and implement
  schemes for its efficient use and conservation.
• Prescribe energy conservation building codes for
  its use/conservation in commercial buildings
• State Governments to amend building codes to
  suit regional and local climatic conditions.
• Direct owners or occupiers of commercial
  buildings to comply with provisions of building
  codes.

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What are Energy Conservation Building Codes?

• ECBC set minimum energy efficiency standards for
  design and construction
• ECBC encourage energy efficient design or
  retrofit of buildings so that
• It does not constrain the building function,
  comfort, health, or the productivity of the
  occupants
• Has appropriate regard for economic
  considerations (life cycle costs i.e.
  construction energy costs are minimized)

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ECBC Provisions in the EC Act 2001

• BEE would take suitable steps to prescribe
  guidelines for energy conservation building codes
• Central Government can prescribe energy
  conservation building codes, and direct
  owners/occupiers to comply with them
• State Government can modify the code in response
  to local climate conditions.

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ECBC Development Approach

• Broad Stakeholder participation
• Building Industry, Manufacturers, Professionals,
  Govt. Agencies etc.
• Addresses local design conditions and
  construction practices
• Emphasis on maximizing building envelope benefits
  to encourage better designs
• First generation code ease of use is a priority
• Both in terms of code requirements and language

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ECBC development Process

• An extensive data collection was carried out for
  construction types and materials, glass types,
  insulation materials, lighting and HVAC equipment
• Base case simulation models were developed
• The stringency analysis was done through detailed
  energy and life cycle cost analysis.
• A stringency level for each code component was
  established
• Code was finalized after consideration of
  comments on a draft version.
• Launched by Honble Minister for Power on 27th
  May 2007

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ECBC Scope

• Mandatory Scope Covers commercial buildings
• Applies to New Construction only
• Building components included
• Building Envelope (Walls, Roofs, Windows)
• Lighting (Indoor and Outdoor)
• Heating Ventilation and Air Conditioning (HVAC)
  System
• Solar Water Heating and Pumping
• Electrical Systems (Power Factor, Transformers)

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Addressing Climate Zones Variations

• Five climate zones
• Composite (Delhi)
• Hot Dry (Ahmadabad)
• Hot Humid (Kolkata),
• Moderate (Bangalore)
• Cold (Shillong)

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ECBC Compliance Approaches

• Component-based (prescriptive)
• requires little energy expertise provides
  minimum performance requirements no flexibility
• System-based (trade-off)
• allows some flexibility through the balance of
  some high efficiency components with other lower
  efficiency components
• Whole building design analysis (performance)
• allows flexibility in meeting or exceeding energy
  efficiency requirements (as compared to a
  baseline building)

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Building Envelope Design
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ECBC Impact Case Studies
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Case study 1 CESE, IIT Kanpur

• Building envelope
• Cavity wall with insulation
• Insulated and shaded roof
• Double glazing and shading for windows
• Lighting system
• Efficient fixtures
• Efficient lamps
• Daylight integration
• Average LPD lt 1 W/ft2
• HVAC system
• Load calculation with optimized envelope and
  lighting system
• Efficient chillers
• Efficient condenser cooling
• Use of geothermal energy for cooling

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Case study 1 CESE, IIT Kanpur
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Case study 2 Fortis Hospital

• Proposed at Shalimarbagh,
• New Delhi
• Initial energy consumption 605 kWh/m2 yr
• Building envelope
• AAC blocks
• Insulated roof
• Double glazing and shading for windows

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Case study 2 Fortis Hospital

• Lighting system
• Efficient fixtures
• Efficient lamps
• Daylight integration
• Load reduction of 33
• HVAC system
• Load calculation with optimized envelope and
  lighting system
• Efficient chillers
• Efficient fans for AHUs
• Use of VFDs

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Case study 2 Fortis Hospital
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Case study 3 Triburg office
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Environmentally Sensitive Design Makes Sense

• Energy savings are of the order of 50
• Initial cost increases by 10 to 15, but payback
  is obtained in 5 to 7 years
• The most cost effective way to meet the ECBC
  requirement is to design buildings with
  appropriate regard to climate and sun.
• A design not sensitive to sun and climate will
  have to invest more to meet the minimum ECBC
  standard

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National Impact Potential

• The average energy use (lighting and HVAC) for
  typical commercial building is 200 kWh/sq.
  meter/year.
• Mandatory enforcement of ECBC shall easily reduce
  the energy use by 30-40 to 120-160 kWh/sq.
  meter/year.
• Nationwide Mandatory enforcement of ECBC would
  yield a saving of 1.7 billion kWh for 2007-2008.

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Impact of Energy Codes

• Market Development for EE products
• Building Insulation
• Energy Efficient Windows (Glass and Frames)
• High-Efficiency HVAC Equipment
• Improved Design Practices
• Lighting and Day-lighting
• Natural Ventilation/Free-Cooling Systems
• Lower Energy Use and Reduced Electricity Bills
• Reduced connected load and Improved Power Factor

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Typical Implementation Schedule
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Proposed Scheme for Mandatory Implementation of
ECBC

• ECBC Enforcement
• Government buildings enforced by agency
• Private Institutional buildings enforced via
  local code process and certified by independent
  accredited agencies
• Market programs
• Green Building Rating Systems
• Energy Use Certification Labeling Schemes

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ECBC Development Next Steps

• Market Development
• Design support through Voluntary ECBC-compliant
  Building Program
• DSM Programs (Design Assistance / Rebates)
• Green Building Rating Systems
• Energy Use Certification Labeling Scheme
• Capacity Building
• Checking and Certification Systems for Equipment
  and Systems
• Capacity building of State and Municipal
  implementing agencies
• Accreditation, training and monitoring of
  certification agencies
• Design Manuals, Software, and Training and
  Technical support for Architects, Engineers, and
  Code Officials
• Awareness programs for building owners,
  designers, and users

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