Page 391 - Materials Chemistry, Second Edition

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Appendix A
Solution of Exercises

Solution of exercise: Provide an equal benefit of system variants (Section 2.2.5.3)

Product system A: PE packaging Product system B: glass packaging

Benefit: Benefit:
• Food packaged • Food packaged
Added value:
Added value:
• y kg secondary material
• x MJ energy provided
glass provided
System expansion* System expansion*
• Provision of y kg glass from • Provision of x MJ energy
primary raw material using light fuel oil
A + A* B + B*
Indicator
environmental
impact
(relative unit) A B*
B
A*

Life Cycle Assessment (LCA): A Guide to Best Practice, First Edition.
Walter Kl¨ opffer and Birgit Grahl.
c 2014 Wiley-VCH Verlag GmbH & Co. KGaA. Published 2014 by Wiley-VCH Verlag GmbH & Co. KGaA.