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    Item type:Publication, Access status: with files ,
    Simulation-framework for illicit-goods detection in large volume freight
    (epubli, 2017-10)
    Kretschmann, Lutz
    ;
    Münsterberg, Torsten
    Innovative non-intrusive inspection technologies can help customs prevent illicit trade in large volume freight. Validation whether technologies fulfill their intended purpose ideally takes place under real conditions. However, constraints limit the number and type of experiments performed during such field trials. Against this background simulation offers the opportunity to evaluate improvements in detection of illicit-goods without interrupting activities on site. A discrete event simulation framework in the context of large volume freight is introduced in this paper. It provides the means to compare alternative detection architectures - combinations of different detection technologies – regarding their effectiveness in identifying illicit goods in containers while at the same time the flow of goods through security checkpoints can be analyzed. The framework is applied to an exemplary case study comparing a single device detection architecture with a two device system. Results highlight the somewhat counter intuitive logic that adding a second device to the detection architecture either reduces the overall false clear probability at the cost of a higher false alarm rate or vice versa. Further the impact that adding another layer of detection has on the flow of containers through the detection architecture and in particular on process time is discussed. Findings described here are only a first step towards building a comprehensive simulationframework for illicit-goods detection in large volume freight. Nonetheless, they illustrate how modelling and simulation can help customs identify the optimal use of innovative detection technologies to increase overall security at EU-borders.
    Publicationtype: Conference Paper
      694  502
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    Item type:Publication, Access status: with files ,
    Comparative analysis of synchromodality in major European seaports
    (epubli, 2017-10)
    Brümmerstedt, Katrin
    ;
    Meyer-Van Beek, Hendrik
    ;
    Münsterberg, Torsten
    Global container throughput recorded a substantial growth over the past 25 years. The ports of Rotterdam, Hamburg and Antwerp have benefited greatly from this development. At the same time rapid increases can be observed for the dimensions of container vessels calling these ports. In 2005 the average capacity of container vessels in operation between Northern Europe and Far East amounted to 6,000 TEU. Today market actors already talk about container vessels with a capacity of 24,000 TEU. (ITF, 2015) This development provides a challenge for seaports concerning the water-side and landside accessibility. According to UVHH (2014) a rising amount of Ultra Large Container Vessels in the Port of Hamburg bears the risk of an increasing number of peaks and bottlenecks within the container terminals. These fluctuations will be continued at the interface to hinterland transport modes and to the connections to hinterland regions. By intelligently combining and switching between different transport modes the concept of synchromodality could form a solution for improving hinterland transportation and reducing bottlenecks in the seaports. (Tavasszy et al., 2015) This paper analyses the degree of implementation of synchromodality in major European container ports with special focus on the Port of Hamburg.
    Publicationtype: Conference Paper
      591  1578
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    Item type:Publication, Access status: with files ,
    Simulation-based evaluation of operation and maintenance logistics concepts for offshore wind power plants
    (Fraunhofer Verlag, 2017)
    Münsterberg, Torsten
    ;
    Jahn, Carlos
    A modular simulation model for the operation of offshore wind power plants has been developed. The model is able to represent offshore-based and onshore-based logistics concepts. The output is logistics and opportunity costs (revenue losses). Multiple simulation experiments have been conducted on different logistics concepts and offshore wind power plant scenarios. The investigation shows that for most German offshore wind power plants an onshore-based logistics concept is most cost-efficient. The success of onshore-based concepts is related to high additional costs of offshore-based concepts. A combination of concepts leads to the best cost efficiency. The developed model distinguishes itself from other approaches by the ability for monthly analysis.
    Publicationtype: Doctoral Thesis
      806  1317
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    Item type:Publication, Access status: without files ,
    Pooling-Strategien für Operation & Maintenance von Offshore Windparks
    (2015)
    Weigell, Jürgen
    ;
    Münsterberg, Torsten
    ;
    Jahn, Carlos
    Da die Lebenszykluskosten der Offshore Wind Energie im Vergleich zu anderen Energieträgern sehr hoch sind, müssen diese gesenkt werden, um die Wettbewerbsfähigkeit der Offshore Windenergie zu erhöhen. Besonders im Bereich Operation & Maintenance- (O&M) Kosten, die ca. 25% der Lebenszykluskosten eines Offshore Windparks darstellen, lassen sich Potenziale zur Kostensenkung finden. Dies kann u.a. durch neue Konzepte, wie z.B. Pooling von O&M-Ressourcen für Offshore Windparks, geschehen. Beim Pooling werden z.B. Fahrzeuge von Unternehmen gemeinsam genutzt, um die Kosten zu senken und die Flexibilität zu erhöhen. Im Rahmen dieser Ausarbeitung soll ein Überblick über die Möglichkeiten der Reduktion von O&M-Kosten (und somit der Lebenszykluskosten) durch das Pooling von Jack-up Schiffen für Offshore Windparks gegeben werden. Dazu werden anhand eines generischen Beispiels unterschiedliche Szenarien (unterschiedliche Abstufungen der Kooperation zwischen Offshore Windparkbetreibern) analysiert. Eingangsparameter sind hierbei die Ausfallraten der Offshore Windenergieanlagen, die Verfügbarkeit und die Kosten der Jack-up Schiffe, die Entfernung und Verteilung der Offshore Windparks, die Art der Anlagen, die Art der nötigen Reparaturen und die somit benötigten Ersatzteile und die Produktionsverluste der Offshore Windenergieanlagen während der Ausfallzeiten. Da die Datenbasis für Ausfallwahrscheinlichkeiten in Deutschland noch sehr gering ist, wird hierbei auf Daten von britischen, niederländischen und dänischen Offshore Windparks zurückgegriffen. Die Analyse und Auswertung der verschiedenen Szenarien erfolgt mit Hilfe kommerzieller Software für Entscheidungsanalysen und Simulationen. Die Ergebnisse der Szenarien werden im Rahmen einer Fallstudie vorgestellt und sollen die für die gewählten Szenarien kostenoptimalen Lösungen aufzeigen.
    Publicationtype: Conference Paper
      3992
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    Item type:Publication, Access status: without files ,
    Quantity and type forecasting tool for offshore wind power plant spare parts
    (Internat. Center for Numerical Methods in Engineering, 2013)
    Rauer, Robert
    ;
    Münsterberg, Torsten
    ;
    Jahn, Carlos
    In this paper a forecasting model for offshore wind power plant spare parts is presented. The paper starts with an overview about the German offshore wind energy market and the expected future development. To reach a high availability of the turbines, the right amount of spare parts is needed and therefore the authors introduce a tool to forecast the quantity / type of spare parts by a given availability and maintenance strategy. In this context essential terms as reliability, availability, maintenance and service are described.
    Publicationtype: Conference Paper
      63