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Life Cycle Analysis of Glass vs. Polycarbonate Sidelights

Agenda. GoalsSystem OverviewLife Cycle Costs Impacts - Energy, Solid Waste, Air, WaterDriversSummaryRecommendations. Goal. Evaluate two automobile sidelight systemsSidelight = all windows except windshieldPolycarbonate: 40% lighter than glass200 times more resistant to shatterGlass:scrat

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Life Cycle Analysis of Glass vs. Polycarbonate Sidelights

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    1. Life Cycle Analysis of Glass vs. Polycarbonate Sidelights Natalie Henry Jaymie Meliker Mike Turnbull Melissa Vernon April 14, 1999

    2. Agenda Goals System Overview Life Cycle Costs Impacts - Energy, Solid Waste, Air, Water Drivers Summary Recommendations

    3. Goal Evaluate two automobile sidelight systems Sidelight = all windows except windshield Polycarbonate: 40% lighter than glass 200 times more resistant to shatter Glass: scratch resistant

    4. System Overview Impact from assembly of sidelight into vehicle not included transportation between finished good and automotive assembly facility = 1000 miles Packaging of product during transit not included pellet-> inj molding; sidelight -> assembly plant Impact from assembly of sidelight into vehicle not included transportation between finished good and automotive assembly facility = 1000 miles Packaging of product during transit not included pellet-> inj molding; sidelight -> assembly plant

    5. Assumptions Packaging glass data equivalent to flat glass PC does not need scratch resistant coating Equivalent mfg, recycling practices in Europe & US Identical mechanisms for window function during use phase

    6. Polycarbonate Flow Diagram Minimal resource depletion potential Only transportation included is sidelight to assembly because Glass production data included cradle to gate no transportation pellets to inj molding 2 sources of data PC, and inj moldingMinimal resource depletion potential Only transportation included is sidelight to assembly because Glass production data included cradle to gate no transportation pellets to inj molding 2 sources of data PC, and inj molding

    7. Glass Flow Diagram Minimal resource depletion potential Only transportation included is sidelight to assembly glass data includes acq ->sidelight production Minimal resource depletion potential Only transportation included is sidelight to assembly glass data includes acq ->sidelight production

    8. Vehicle of Study WHY using G van data available on fuel economy, tailpipe emission rates, life of vehicle, and mass of vehicle WHY using G van data available on fuel economy, tailpipe emission rates, life of vehicle, and mass of vehicle

    9. Life Cycle Costs

    16. Energy, Solid Waste, Water Emissions Summary

    17. Air Emissions Summary

    18. Key Drivers

    19. Summary of Results Glass Lower environmental impact in Mfg phase Lower total: Particulate matter SO2 Lower total cost Polycarbonate Lower environmental impact in Use phase Lower total: NOx & HC Solid waste CO Lead in air emissions

    20. Recommendations PC Manufacturers Reduce manufacturing costs Improve scratch resistant coating Develop single unit for sidelight & encapsulation Glass Manufacturers Reduce/recover energy used in manufacturing Increase recycled content from 15% to 50%

    21. Questions & Answers

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