Green-Computing-8Jan09

Green-Computing-8Jan09 - Life Cycle Assessment Green...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Green Computing – CS 290N – Winter 2009 – January 7 Life Cycle Assessment Life Cycle Assessment
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Green Computing – CS 290N – Winter 2009 – January 7 “Apple's Environmental Technologies Department is an integral part of Apple's product teams, providing input that guides product teams toward more environmentally-friendly product design. The Department performs industry-leading work in • reducing the amount of toxic substances in its products, • increasing the energy efficiency of its products, • and lowering the amount of greenhouse gases emitted by its products. In support of this latter effort, the Environmental Technologies Department seeks an engineer to support its life cycle analysis (LCA) initiative.” 20 November 2008, Jean L. Lee, Ph.D., Environmental Technologies Department, Apple Inc.
Background image of page 2
Green Computing – CS 290N – Winter 2009 – January 7 Ecosphere Ecosphere Anthroposphere Anthroposphere Source of: Materials Energy Water Land Sink for: Wastes Emissions Services Products Production Industrial production and consumption systems use the environment as source of resources and sink for wastes and emissions The BIG picture: The BIG picture:
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Green Computing – CS 290N – Winter 2009 – January 7 Question: Which beverage container has the lowest environmental impact? Note: The following case study is for teaching purposes only
Background image of page 4
Green Computing – CS 290N – Winter 2009 – January 7 Material choice for beverage containers Material choice for beverage containers Aluminum PET Glass Primary energy requirements for material production (MJ/kg) 211.5 82.7 12.0 Primary energy requirements for container forming (MJ/kg) 10.4 15.5 2.9 Density(kg/m 3 ) 2,700 1,370 2,460 Environmental impact indicator: Primary energy requirements Material production Container manufacturing Use & distribution Recycling or disposal Processes causing environmental impacts:
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Green Computing – CS 290N – Winter 2009 – January 7 Beverage container Content Mass Mass/content 12 fl. oz. aluminum can 0.473 liter 19 gram 0.0402 kg/liter 20 fl. oz. PET bottle 0.591 liter 26 gram 0.0440 kg/liter 25.4 fl. oz. glass bottle 0.750 liter 325 gram 0.4333 kg/liter Definition of Functional Unit: Containing 1 liter of beverage Reference flows: 40.2 gram of aluminum cans 44.0 gram of PET bottles 433.3 gram of glass bottles Materials can not be compared on a mass basis. Material choice for beverage containers Material choice for beverage containers
Background image of page 6
Green Computing – CS 290N – Winter 2009 – January 7 How much energy is required to transport the beverage containers? Beverage container Mass (g/liter) Transportation distance (km) Transportation energy (MJ/tonne-km) (MJ/liter) Aluminum 40.2 500 2.5 0.05 PET 44.0 500 2.5 0.05 Glass 433.3 500 2.5 0.54 Beverage container Material production (MJ/liter) Container forming (MJ/liter) Total (MJ/liter) Aluminum 211.5 * 0.0402 = 8.5 10.4 * 0.0402 = 0.4 8.9 PET 82.7 * 0.0440 = 3.6 15.5 * 0.0440 = 0.7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 50

Green-Computing-8Jan09 - Life Cycle Assessment Green...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online