Dr.-Ing.

Albrecht, Stefan

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  • Publication
    Ökologische Bewertung ausgewählter Molecular-Sorting-Demonstratoren
    ( 2016)
    Gehring, Florian orcid-logo
    ;
    Lindner, Jan Paul orcid-logo
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    Brandstetter, Christian Peter
    ;
    Albrecht, Stefan orcid-logo
    ;
    Leistner, Philip
    Unter dem Aspekt sich verknappender Ressourcen und der Nachhaltigkeit ist die verstärkte Gewinnung und Nutzung hochwertiger stofflicher Ressourcen aus Abfallströmen erstrebenswert. Eine steigende Individualisierung von Produkten und kürzere Lebenszyklen bringen eine zunehmende Stoffvielfalt bei gleichzeitig sinkenden Stoffmengen mit sich. Im Projekt Molecular Sorting werden beispielhaft Verfahren zur Stofftrennung auf kleinster erforderlicher Ebene entwickelt. Parallel dazu werden Demonstratoren hinsichtlich ihrer Wirkungen auf Umwelt und Ressourcenverfügbarkeit untersucht, was hier anhand zweier Beispiele gezeigt wird. Durch Design for Environment konnten ökologische Aspekte in maßgebende Entwicklungsentscheidungen integriert, Stellschrauben identifiziert und die ökologische Sinnhaftigkeit der neuen Verfahren gezeigt werden.
  • Publication
    LCA study of unconsumed food and the influence of consumer behavior
    ( 2016)
    Gruber, Lisa Marie
    ;
    Brandstetter, Christian Peter
    ;
    Bos, Ulrike
    ;
    Lindner, Jan Paul orcid-logo
    ;
    Albrecht, Stefan orcid-logo
    Purpose: In the light of anthropogenic resource depletion and the resulting influences on the greenhouse effect as well as globally occurring famine, food waste has garnered increased public interest in recent years. The aim of this study is to analyze the environmental impacts of food waste and to determine to what extent consumers' behavior influences the environmental burden of food consumption in households. Methods: A life cycle assessment (LCA) study of three food products is conducted, following the ISO 14040/44 life cycle assessment guidelines. This study addresses the impact categories climate change (GWP100), eutrophication (EP), and acidification (AP). Primary energy demand (PED) is also calculated. For adequate representation of consumer behavior, scenarios based on various consumer types are generated in the customer stage. The customer stage includes the food-related activities: shopping, storage, preparation, and disposal of food products as well as the disposal of the sales packaging. Results and discussion: If the consumer acts careless towards the environment, the customer stage appears as the main hotspot in the LCA of food products. The environmental impact of food products can be reduced in the customer stage by an environmentally conscious consumer. Shopping has the highest effect on the evaluated impact categories and the PED. Additionally, consumers can reduce the resulting emissions by decreasing the electric energy demand, particularly concerning food storage or preparation. Moreover, results show that the avoidance of wasting unconsumed food can reduce the environmental impact significantly. Conclusions: Results of this study show that the influence of consumer behavior on the LCA results is important. The customer stage of food products should not be overlooked in LCA studies. To enable comparison among results of other LCA studies, the LCA community needs to develop a common methodology for modeling consumer behavior.
  • Publication
    Entwicklungsbegleitende Ökobilanzierung von Recyclingprozessen
    ( 2016)
    Lindner, Jan Paul orcid-logo
    ;
    Gehring, Florian orcid-logo
    ;
    Albrecht, Stefan orcid-logo
    ;
    Krieg, Hannes
    ;
    Leistner, Philip
    Die Gewinnung stofflicher Ressourcen aus Reststoffen kann einen wichtigen Beitrag zur Ressourcenschonung leisten. Im Rahmen des Projekts Molecular Sorting werden Recyclingverfahren zur Erschließung hochwertiger Stoffströme erforscht mit dem Ziel einer öko- und ressourceneffizienten Nutzung von Reststoffen. Die Methode der Ökobilanz ist dabei integraler Bestandteil. Zukünftige Entwicklungen spielen bei der Bewertung der ökologischen Nachhaltigkeitsaspekte eine große Rolle, da neben der Technologie auch die Energiebereitstellung, alternative Technologien oder die Art und Gewinnung der Ressourcen in die ganzheitliche Bewertung miteinfließen. Durch eine entwicklungsbegleitende Ökobilanz werden ökologische Risiken frühzeitig erkannt und können systematisch gering gehalten werden.
  • Publication
    Grundlagen der ökologischen Bilanzierung
    ( 2016)
    Fischer, Matthias orcid-logo
    ;
    Albrecht, Stefan orcid-logo
    ;
    Ilg, Robert
    ;
    Held, Michael orcid-logo
    ;
    Jäger, Michael
    ;
    Leistner, Philip
    In diesem Beitrag wird auf verschiedene Methoden und Inhalte, konkrete Anwendungen, Datenquellen, Nutzen und spezifische Lösungen aus dem Themenfeld der ökologischen Bilanzierung näher eingegangen.
  • Publication
    Integration of land use aspects in LCA: Determination of land use types as a crucial factor influencing the result
    ( 2015)
    Arana, Daniel
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    Bos, Ulrike
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    Liedke, Alexander
    ;
    Knüpffer, Eva
    ;
    Albrecht, Stefan orcid-logo
    ;
    Lindner, Jan Paul orcid-logo
    ;
    Kupfer, Thilo
    In recent years, scientists worldwide have worked successfully on the implementation of land use aspects into Life Cycle Assessment (LCA). However, there are still challenges to be met to get valuable and comparable results when using different land use calculation methods. In order to calculate land use information, land use types have to be determined and distinguished. The Department Life Cycle Engineering at the University of Stuttgart (LBP-GaBi) conducted a study to analyse the influence of the choice of the classfication system and the respective land use types on the soil quality indicators used in LANCA (Land Use Indicator Value Calculation). Various classfication systems like Global Land Cover 2000, GlobCover or the WWF Terrestrial Ecoregions of the World are investigated and analysed with respect to the application for the particular land use types. Finally, based on these findings an approach for a standardized determination o.f land use types is developed.
  • Publication
    Smart models as intelligent assistants in building LCA
    ( 2010)
    Löwe, K.
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    Albrecht, S. orcid-logo
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    Fischer, M.
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    Wittstock, B.
    Life Cycle Assessment (LCA) is one of today's key issues if we look at the environmental performance of building materials, construction components or especially if we discuss about the sustainability of entire buildings. LCA assists in answering questions concerning these topics by using specific software, such as the GaBi 4 software, and by setting up tailored models. The difficulties in designing such tailored models for building LCA are high expenditures of time for modeling, the need for flexibility in assessing conditions and the representation of various building circumstances. In the context of a sustainable certification according to the German Certification for Sustainable Construction (DGNB), a generic built and hierarchical drawn up model for an office building is assembled within the GaBi 4 software. Its structural design complies with the ISO 14040/44 standard, and with the requirements for a sustainable evaluation according to the German Certification for Sustainable Buildings and Construction. As fully parameterized model it was applied in practical certification process for assessing the environmental impacts of the accredited office building and furthermore its applicability was validated. Therefore, the structural assembly of the described model and the flexibility of application for other building types will be demonstrated and discussed, to work out, how a smart model for building LCA may look like.