Relative Contribution of a Subsystem to the Environmental Impact of a Complex System: Application to Aluminium Electrolysis Conversion Substations

François Cluzel (1) , Dominique Millet (2) , Yann Leroy (1) , Bernard Yannou (1)

1 LGI - Laboratoire Génie Industriel - EA 2606
2 LISMMA - Laboratoire d'Ingénierie des Systèmes Mécaniques et des MAtériaux

We focus in this paper on the contribution of a subsystem to the environmental impact of a system. In this way we propose to explore some limits related to Life Cycle Assessment (LCA), in particular the consideration of the use phase specificities (for example lifetime, technology or energy mix). Two cases studies concerning AREVA T&D's aluminium electrolysis conversion substations are proposed to illustrate these problems. The first one considers the environmental contribution of a transformer to the electrical substation, whereas the second one studies the contribution of the substation to primary aluminium production. We show that the context specificities of a product should be taken into account in order to assess its real environmental impacts. To ignore them can lead to false conclusions, what is essential to avoid when a company wants to define its eco-design strategy.

Mots clés: Environmental evaluation; Life cycle assessment; Complex system; Subsystem; Aluminium electrolysis conversion substation

Domaines: Mécanique [physics.med-ph]; Modélisation et simulation

François Cluzel, Dominique Millet, Yann Leroy, Bernard Yannou. Relative Contribution of a Subsystem to the Environmental Impact of a Complex System: Application to Aluminium Electrolysis Conversion Substations. IDMME - Virtual Concept 2010, Oct 2010, Bordeaux, France. Paper no. GEDI-P109, p. 90. ⟨hal-00794671⟩