Materialrückführprozesse in der Sachbilanz
Materialrückführprozesse in der Sachbilanz
Product life cycle assessments (LCA) are carried out for products with regard to a careful treatment of the environment and ressources. An LCA takes substance flows and environmental impacts of a whole life cycle into account. LCA's comprise processes from raw material mining to waste treatment...
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Personal Name(s): | Kehrbaum, R. (Corresponding author) |
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Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
1997
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Physical Description: |
III, 212 p. |
Document Type: |
Report Book |
Research Program: |
Addenda |
Series Title: |
Berichte des Forschungszentrums Jülich
3462 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Product life cycle assessments (LCA) are carried out for products with regard to a careful treatment of the environment and ressources. An LCA takes substance flows and environmental impacts of a whole life cycle into account. LCA's comprise processes from raw material mining to waste treatment. If, using LCA, products with a recyclingfriendly design are to be assessed, then life cycle coupling material recovery processes (MRP) have also to be taken into consideration (e.g. recycling of a car body for the production of concrete steel). For this consideration, eleven calculation formulas of existing or additional developed inventory methods are described in this thesis. Up to now there is no consensus among LCA practitioners about a standardized application of these methods. Since the selection of a particular method is not regulated, LCA results are not always comparable with each other. The selection, however, should always be reasonable and based on a detailed investigation and judgement of the methods according to their different qualities. To this end six criteria are developed. After judging the fulfilment of each criterion, a final valuation of the methods depends on the weight assigned to each criterion. Hence this thesis demonstrates by example precisely which recommendations for the application of methods in LCA's derive from a given weighting. Subsequently it is verified whether the various inventory methods can be applied to different MRP's between product life cycles such as the recycling of product wastes, materials and parts. During this verification specific inventory methods are recommended based on the chosen criteria weighting. In addition, it is shown how the nature and the extent of coupling MRP's could be determined in an LCA. Further it is explained how one can define primary, material recovery and disposal process chains. This is necessary during the application of inventory methods. To show the nature and the possible extent of the influence on the inventory and specific indicators, each inventory method is applied to the same exemplary life cycle. The life cycle of a representative wind turbine was chosen for this purpose because of its significantly influenced inventory. The application serves furthermore to demonstrate the practical use of the different methods. |