Energie & Umwelt

Director
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Das Department Energie & Umwelt ist Ihr Sprungbrett in eine grüne Zukunft! Erneuerbare Energien, Klimaschutz und Umweltmanagement stehen im Fokus. Mit technischem Wissen, praxisnahen Projekten, modernen Labors und persönlicher Betreuung werden Sie optimal auf eine zukunftsweisende Karriere vorbereitet. Gestalten Sie die Welt von morgen!

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    Using FusiX platform for Intelligent Energy Management Systems’ development
    (Leykam, 2020-11-26)
    Georgoutsos, V. 
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    Soulioti, G. 
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    Alifragkis, V. 
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    Livanos, N. 
    A novel Decision Support System (DSS) development framework, named FusiX, with integrated simulation support, Graphical User Interface (GUI) support and data fusion engine, is developed to meet the needs of the modern building energy management sector. Its main objective is to facilitate and streamline the development and the expansion of a complete DSS. FusiX constitutes a versatile base on which Intelligent Energy Management Systems (IEMS) can be built, allowing a system engineer to incorporate different data resources into a single intelligent system. Its data fusion engine can process heterogeneous data from historic, real time sensed data, simulated and predicted data independently from their location (local or remote). The software system is extended with a web-based GUI for efficient administration, exposing all real-time measurements and available commands to authorized users, supporting user alerting, as well as providing means to produce and export business and technical reports.
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    Interface characterization of Cu-Cu ball bonds by a fast shear fatigue method
    (Elsevier, 2020-11)
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    Khatibi, Golta 
    A highly accelerated shear fatigue testing method is presented to test the long-term reliability and reveal the bonded interface of thermosonic Cusingle bondCu ball bonds. The method is an adaptation to a new industrial fatigue tester (BAMFIT) and can be conducted without an intricate specimen preparation. This method induces mechanical cyclic shear stresses to the Cu nailhead in order to initiate fatigue fracture until lift-off, revealing the actual bonded interface. This study compares the fatigue resistance of Cu wire bonded to coarse and fine grained Cu and Al metallization. The fatigue experiments are accompanied by nano indentation tests, shear tests and finite element analysis. The fatigue results showed the best performance for Cu bonds on coarse grained Cu pads (metallization), followed by those bonded on fine grained Cu while the Cusingle bondAl nailheads failed at least a decade earlier than Cusingle bondCu bonds. Annealing the specimens prior to testing resulted in slight increases in the number of loading cycles to failure (Nf) for Cu bonds as well as for Cusingle bondAl bonds, while the scattering in Nf for Cu bonds increased. Nevertheless the calculated endurance limit of the fatigue data decreases with increasing annealing stages, due to a change in the fracture probability curve. With the ability to compare the fatigue behaviour of the bonded interface within minutes, this method is most suitable for rapid qualification at an early stage of development.
      2  81Scopus© Citations 7
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    Integrated Building Concepts – Current IEA Trends and Monitoring Results
    (2008)
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    Jähnig, Dagmar 
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    Wagner, Waldemar 
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