and its relevance to GHG Accounting Dr.-Ing. Jyotirmay Mathur, - - PowerPoint PPT Presentation

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and its relevance to GHG Accounting Dr.-Ing. Jyotirmay Mathur, - - PowerPoint PPT Presentation

Sep 18, 2023 9 likes •162 views

LCA of Commercial Buildings and its relevance to GHG Accounting Dr.-Ing. Jyotirmay Mathur, Professor, Mechanical Engineering Department Malaviya National Institute of Technology Jaipur jmathur.mech@mnit.ac.in LCA Coverage Embodied energy

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Dr.-Ing. Jyotirmay Mathur, Professor, Mechanical Engineering Department Malaviya National Institute of Technology Jaipur jmathur.mech@mnit.ac.in

LCA of Commercial Buildings and its relevance to GHG Accounting

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LCA Coverage

  • Embodied energy
  • Operating energy for 40/50/60-year life cycle
  • Retrofitting energy and material
  • Salvage
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Defining Boundaries

Source: MIT Research, USA

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LCA approach

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Three Major Approaches

  • Process chain analysis
  • Input-output method
  • Material balance
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LCA process

Source: Johanna Mero, WBC16

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Importance of GHG Accounting

Global warming potential (CO2 equivalent) quantified for several purposes

  • Benchmarking emissions of current construction

practices

  • Comparing impacts of using different construction

materials

  • Understand relative magnitude of relative impacts of

different life cycle phases

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Important is

  • Transparency of data
  • Define scope
  • Identify system boundaries
  • Define functional unit
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Example of Glass

  • Usually talked about
  • Lot of variations
  • Can save significant operational energy
  • What is baseline for comparison
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Indicative LCA results

Source: Johanna Mero, WBC16

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Locational variations

  • Has significant impact on the life cycle
  • Assuming 40-year lifetime
  • Difference in GWP between different parts of

India can be about 25%

  • Transportation distances are negligible over the

total life cycle

  • HVAC has about 50% impact in the operational

energy use

  • Renewable share in grid may change the

numbers significantly

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Life Cycle Impact Reduction Approaches

  • Use less energy intensive materials
  • High recycled content
  • Material efficient design
  • Energy efficient equipment and

appliances

  • Monitoring of operation
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Requirements for accounting

  • Benchmarking
  • Verifiable performance monitoring
  • Database for embodies energy of

materials and processes

  • Standardisation of processes
  • Uncertainty analysis (e.g. RE, bandwith

emission factors of materials)

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Way forward

  • Define standard LCA methodology
  • Enhance LCA database of materials
  • Standardise construction process from

LCA point of view

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Thanks!!