Wayne Trusty ICC Annual Conference Global Connections Day October - - PowerPoint PPT Presentation
Whole Building Analysis: An Overview Wayne Trusty ICC Annual Conference Global Connections Day October 19, 2016 Wayne B. Trusty & Associates Limited transportation water use energy use Life Cycle resource resource use extraction
Wayne Trusty ICC Annual Conference Global Connections Day October 19, 2016
Wayne B. Trusty & Associates Limited
transportation energy use emissions to air emissions to water solid wastes resource extraction effects resource use (depletion) water use
A methodology for assessing the environmental performance of a product over its full life cycle
standards and rating systems
Cradle - to - gate (Manufacturing) On-site construction End - of - Life Operations & Maintenance (Occupancy) Initial embodied Final Embodied
Environmental Effects
Recurring embodied + Operating
Tracking Flows: The Inventory Step
BUILDING CONSTRUCTION
(manufacturing)
OCCUPANCY
(use, reuse, maintenance)
DEMOLITION/DISPOSAL MATERIAL ACQUISITION
Manufacturing Products / Assemblies
Energy Water Material resources Emissions to: Air Water Land
Raw Material Acquisition Waste Management Recycle / Reuse Products / Materials
Inventory Impact Assessment (Valuation)
THE GOAL: to measure ultimate impacts
Mid-point impact indicators
(characterization & Normalization)
non-renewable)
Some LCA tools connect to BIM tools like Revit
Standard Practice for Minimum Criteria for Comparing Whole Building Life Cycle Assessments for Use with Building Codes, Standards, and Rating Systems Supports use of whole building LCA in codes, standards, and building rating systems Ensure comparative assessments of final designs relative to reference designs of the same building are fair and take account of:
building is made of
that matters
effects, especially energy
LCA is not the answer to all problems
E.g., does not readily handle such issues as:
releases
Think in terms of a toolkit & don’t expect one tool to do it all
Take the environment into account throughout the
project delivery process
Focus on true environmental performance measures Look at the entire life cycle of a building Make functionally equivalent material comparisons Recognize and take account of environmental and
economic trade-offs
Make sound decisions about whether to keep or
demolish existing buildings A FINAL CAUTION: BE WARY OF SIMPLISTIC ANSWERS TO COMPLEX QUESTIONS
The rest of the story is the energy to make and move energy — called pre- combustion in LCA End use energy estimates just one part of the story Even source energy doesn’t get it all
Design 1 Design 2 Regional Electricity Grids Transportation & Product Technologies Maintenance Schedules u Raw Materials u Energy Use by type u Water Use u Emissions to Air u Emission to Water u Solid Wastes
INVENTORY
u Primary energy u Acidification u Aquatic eutrophication u Global warming potential u Respiratory effects u Ozone depletion u Resource use u Photochemical smog
SUMMARY MEASURES
Building Assemblies Bill of Materials Life Cycle Inventories Materials & Products Building Construction Operations Demolition/ Disposal Energy pre- combustion effects
. . . informed environmental choices
Life Cycle Assessment Framework Goal & Scope Definition Interpretation Inventory Analysis (LCI) Impact Assessment (LCIA) Direct Applications
& Improvement