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Greenhouse Gas Accounting for Manufacturers 32nd

Greenhouse Gas Accounting for Manufacturers

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Peltokorpi, Jaakko Vatanen, Saija Glock, Christoph H. Aalto Univ Espoo Finland VTT Tech Res Ctr Finland Ltd Espoo Finland Tech Univ Darmstadt Darmstadt Germany

ISBN: (纸本)9783031381645;9783031381652

Legislation and stakeholders increasingly urge European original equipment manufacturers (OEM) to disclose and reduce greenhouse gas (GHG) emissions of their operations and supply chains. However, a sector-specific reporting standard is not yet available for manufacturing industry. This study takes a stepwise approach to identify the GHG emission sources and intensities in further detail. The primary data of a case company, a Finnish gear manufacturer, was supplemented with secondary data from the literature. Using the proposed approach, an OEM share of the total emissions was estimated at 15%. Evaluating emissions of specific suppliers is more difficult as there is little access to the suppliers' data. The study gives insights for the manufacturers on how to get started with GHG emissions accounting in the factories and supply chains and to show their responsible actions in the climate change mitigation.

关键词： Greenhouse gas GHG Accounting Manufacturing Gear Factory Supply chain

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Framework Proposition for the Implementation of Task Shifting Practice: A Case Study in the Healthcare Sector 32nd

Framework Proposition for the Implementation of Task Shiftin...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Costa, Federica Alemsan, Najla Staudacher, Alberto Portioli Tortorella, Guilherme Luz Politecn Milan Milan Italy Univ Fed Santa Catarina Florianopolis SC Brazil Univ Melbourne Melbourne Australia

ISBN: (纸本)9783031382406;9783031382413

Healthcare sector faces many challenges related to resource allocation, scheduling and patient flow and for this reason increasingly demands operations management techniques. The presented work deals with Task shifting practice which the intention is to create a framework which describes the most relevant variables and their interconnection that affect the delegation of activities between healthcare professionals. The research follows a case study in a hospital in Italia where an intensive phase of data collection was undertaken, and analytical and empirical data analyses were carried out. The output of this work is the design of a Final Framework that outlines the variables that influencing the implementation of the task-shifting and the interconnection between them, structuring the performance measurement phase and highlighting enablers to mitigate traditional barriers. According to a managerial perspective, the outcome supports healthcare companies in the adoption of this organizational practice by reducing the effort required thanks to the deepen planning phase and the detection of tacit delegation. According to an academical perspective this work presents a new way to represent and execute a task shifting in hospitals. The future research may complete the proposed Framework by deepening the implementation phase and widening the data collection.

关键词： Task Shifting Hospital PDCA Healthcare Sector

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A Geometric Electric Motor Model for Optimal Vehicle Family Design 16th

A Geometric Electric Motor Model for Optimal Vehicle Family ...

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16th International Symposium on Advanced Vehicle Control

作者： Clemente, Maurizio Borsboom, Olaf Salazar, Mauro Horman, Theo Eindhoven Univ Technol NL-5612 AZ Eindhoven Netherlands

ISBN: (纸本)9783031703942;9783031703928;9783031703911

This paper presents a design optimization framework that jointly optimizes battery size with the geometric dimensions of the electric motor for a family of battery electric vehicles, with global optimality guarantees. As opposed to conventional models, we devise a quasi-static model of the motor internal losses as a function of both its geometry and operating points, using a convex surrogate modeling approach. Specifically, we implement a low-level motor scaling, capturing the impact on performance and losses of changing the motor geometry in axial and radial directions. Hence, we leverage the framework to solve a concurrent optimization problem and identify the optimal module sizing for a family of electric vehicles. Finally, we test our framework on a benchmark problem where we jointly design motor and battery for three different types of vehicles (a city car, a compact car, and a cross over), whereby the prediction efficiency is in line with the high-fidelity modeling software.

关键词： Electric powertrain design Electric Motor Modeling Concurrent Design Optimization Surrogate Modeling Convex Optimization

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Data-Driven Discovery of Manufacturing Processes and Performance from Worker Localisation 32nd

Data-Driven Discovery of Manufacturing Processes and Perform...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Aslan, Ayse El-Raoui, Hanane Hanson, Jack Vasantha, Gokula Quigley, John Corney, Jonathan Edinburgh Napier Univ Edinburgh EH10 5DT Midlothian Scotland Univ Strathclyde Glasgow G1 1XQ Lanark Scotland Univ Edinburgh Edinburgh EH8 9YL Midlothian Scotland

ISBN: (纸本)9783031382406;9783031382413

In complex manufacturing industries that are not fully automated and involve human workers it is important to identify deviations from the planned production schedule and locate bottlenecks for improved efficiency. This is not an easy task as it requires data on how workers are actually performing the manufacturing activities. Ultra-wideband (UWB) tags, which are sensors that track movement, can be used to collect this data. Previous research has mostly focused on using these sensors to detect faults and anomalies and to ensure worker safety. However, this paper presents a method for using UWB data to discover process models of manufacturing activities using process mining techniques. We applied our method to a real assembly line with UWB data and found deviations from the prescribed process steps and bottlenecks in the assembly line, which indicated that the first assembly step can take twice as much time compared to other steps.

关键词： manufacturing process optimisation industrial productivity process mining indoor positioning systems

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Development of a Cost Estimation Model in a Furniture Manufacturer 32nd

Development of a Cost Estimation Model in a Furniture Manufa...

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32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Reis, Francico Amaral, Antonio Oliveira, Marisa Ferreira, Fernanda A. Pereira, M. Teresa Polytech Porto Sch Engn ISEP Rua Dr Antonio Bernardino De Almeida 431 P-4249015 Porto Portugal Inst Sci & Innovat Mech & Ind Engn INEGI Rua Dr Roberto Frias 400 P-4200465 Porto Portugal Inst Syst & Comp Engn Technol & Sci INESC TEC Porto Portugal Polytech Inst Porto Appl Management Res Unit UNIAG Sch Hospital & Tourism Rua D Sancho I 981 P-4480876 Vila Do Conde Portugal

ISBN: (纸本)9783031381645;9783031381652

This work was developed to improve the costing process of new products within the Product Development Department of a furniture manufacturer. It consisted of creating a parametric cost estimation model based on applying simple and multiple linear regressions, considering the existing data of the products produced and their respective costs. The proposed model considers the cost estimation of creating a product that covers the materials and operations costs. The suitability of the different independent variables was studied by applying simple and multiple linear regressions. A set of functions that return an estimate of the cost as a function of these predictor variables was obtained. The model built with the functions obtained provides the materials and operations cost estimation. The results indicated that 75% of the tests performed show an estimation error of less than 2% in the total cost of a product. Incorporating this model in a tool with the purpose of cost estimation brings the ability to predict prices faster, improving the internal process of obtaining costing and enhancing the analytical capacity of the team in the relentless pursuit of cost minimization and value creation.

关键词： Cost Estimation Regression analysis Parametric model

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Comparison of Wire Arc Additive Manufacturing and Subtractive Manufacturing Approaches from an Environmental and Economic Perspective 32nd

Comparison of Wire Arc Additive Manufacturing and Subtractiv...

引用

32nd International Conference on Flexible Automation and Intelligent Manufacturing

作者： Kokare, Samruddha Oliveira, J. P. Godina, Radu Univ NOVA Lisboa NOVA Sch Sci & Technol Dept Mech & Ind Engn FCT NOVA P-2829516 Caparica Portugal Univ NOVA Lisboa NOVA Sch Sci & Technol Dept Mat Sci CENIMATI3N P-2829516 Caparica Portugal Univ NOVA Lisboa NOVA Sch Sci & Technol UNIDEMI Dept Mech & Ind Engn FCT NOVA P-2829516 Caparica Portugal Lab Associado Sistemas Inteligentes P-4800058 Guimaraes Portugal

ISBN: (纸本)9783031381645;9783031381652

Wire arc additive manufacturing (WAAM) is a metal AM process that uses metal wire as feedstock and an electric arc to melt the feedstock wire. WAAM has gained attention in the industry due to its benefits like bettermaterial efficiency and higher deposition rates. However, WAAM needs post-processing operations like machining due to its poor surface finish. Therefore, the sustainability potential of WAAM can't be presumed and needs to be proven quantitatively. Fewer studies that conduct an environmental or economic assessment of WAAM are present and do not comprehensively study the effect of post-processing on WAAM's performance. Therefore, the main objective of this study is to carry out an integrated and quantitative environmental and economic assessment of the WAAM process, including the effect of its post-processing operation. A case study of a product: a marine propeller made by WAAM and CNC milling technologies is presented. It is observed that the WAAM approach causes a 60% lower environmental impact compared to CNC milling. However, the WAAM approach is found to be slightly more cost-efficient (by 7%) than CNC milling. The effect of post-processing on WAAM's environmental and economic performance is also studied. WAAM is found to be more economical and ecological than CNC milling when the post-processing machining allowance of 4 mmor lower is left across the surface area of the propeller considered. This study can be helpful to AM practitioners in understanding the factors affecting WAAM's sustainability and in decision-making on sustainable process selection.

关键词： Life Cycle Costing Life Cycle Assessment Propeller Wire Arc Additive Manufacturing CNC milling

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Experimental Study of Turbulent Flow Characteristics Around a Circular Bridge Pier 23rd

Experimental Study of Turbulent Flow Characteristics Around ...

引用

2022 International Association for Hydraulic Environmental engineering and Research Asia Pacific Division

作者： Reddy, Siva Krishna Chandra, Venu Indian Inst Technol Madras Chennai Tamil Nadu India

ISBN: (纸本)9789819760084;9789819760091

Local scour around bridge piers is a problem of much concern for hydraulic engineers. It's a complex mechanism caused by the interaction of the flow field around bridge piers on a sediment bed, resulting in foundation instability. Accurate scour depth estimation is aided by a comprehensive understanding of the flow structure effect on the scouring process, which improves the bridge design. The present study has experimentally investigated the three-dimensional flow field around a circular pier model of 5 cm diameter on a plane sediment bed. Under clear-water flow conditions, the instantaneous 3-dimensional velocities (u, v, w) are collected using the Acoustic Doppler Velocimeter (ADV) at different azimuthal planes (theta = 0 degrees, 45 degrees, 90 degrees, 135 degrees, and 180 degrees) from the flow axis. In each azimuthal plane, velocities are obtained on the vertical planes at different elevations (Z = 5 mm intervals) and radial distances (r = 30, 40, 50, 60, 70, 80, 90, 100, 120, 140, 160, 180, 200, 230, and 260 mm) from the pier centroid point. The collected data is analyzed, and the distributions of time-averaged velocities, turbulence intensities, Reynolds shear stresses (RSS), and turbulent kinetic energy (TKE) around the pier in different azimuthal (at theta = 0 degrees and 90 degrees) and vertical planes are presented. This research can help hydraulic engineers better understand the scour mechanism around bridge piers.

关键词： Bridge pier Flow field Local scour Sediment transport Turbulence

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Thermal Modeling and Optimization of an AC/DC Bidirectional Converter 14th

Thermal Modeling and Optimization of an AC/DC Bidirectional ...

引用

14th International Conference on Computational Heat and Mass Transfer (ICCHMT)

作者： Hilal, A. Nowak, R. Memelink, A. Samul, B. Nguyen, T. Demetriades, G. Hitachi Energy Belgium NV Technol Ctr All Cent Zoning de Jumet 10 B-6040 Jumet Belgium Hitachi Energy Res Pawia 7 PL-31154 Krakow Poland

ISBN: (纸本)9783031672408;9783031672415

Air cooling is widely used in power electronics converters due to its various advantages. It is simpler, cheaper, and lighter than liquid cooling. However, air-cooled solutions' lower thermal efficiency and sensitivity to ambient conditions make their design and optimization a challenge, therefore nowadays numerical simulations are often used to improve and speed up this process. The thermal performance of power converters is always taken into consideration during its design stage and is often limited by the overheating of the semiconductor modules. To decrease temperatures of these critical components, one can try to lower the thermal resistance between the module and heat sink or create a numerical/mathematical model that allows for a broad parameter study and at the end optimization of the module performance. This paper presents a complete thermal model of an air-cooled AC/DC bidirectional converter to get the best out of the cooling system. The aim is to improve its thermal performance by focusing on heat sink optimization. Several heat sinks are considered and the impact on semiconductors junction temperatures as well as passive components is studied. A three-phase semiconductor module is analyzed and thermally modeled to find hot spots under worse operating conditions. Losses are calculated for each chip based on the electrical operating point and thermal simulations are run to ensure junction temperatures are kept within safe operating range. Impacts of heatsink choice on air velocity and pressure drop inside the converter are also presented. Maximum temperature reduction of 15% is obtained and confirmed by experimental results.

关键词： Energy Storage Inverter Cooling CFD

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Virtual Design Process of Customized 3D Printed Modular Upper Limb Prostheses 8th

Virtual Design Process of Customized 3D Printed Modular Uppe...

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8th International Scientific-Technical Conference (MANUFACTURING)

作者： Gorski, Filip Gapsa, Jakub Kupaj, Aleksandra Kuczko, Wieslaw Zukowska, Magdalena Zawadzki, Przemyslaw Poznan Univ Tech Fac Mech Engn Piotrowo 3 PL-60965 Poznan Poland

ISBN: (纸本)9783031564581;9783031564567

This work focuses on the project of a modular mechanical prosthesis developed by AutoMedPrint at Poznan University of Technology. It covers theoretical and practical aspects related to virtual design, especially in medicine, utilizing software such as Autodesk Inventor Professional, 3ds Max, and Unity 3D to enhance the prosthesis interface. The aim of this project was to create a configurator for a mechanical hand prosthesis operating in a virtual reality environment. This configurator serves as an interactive interface that allows patients to choose the appropriate prosthesis model. Ensuring the functionality and ease of use of the application was of key importance. This application is primarily intended for patients with congenital upper limb defects.

关键词： Virtual Reality Unity3D Prosthesis Design

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An Extended Separation-of-Variable Method for the Eigenbuckling of Open Thin Circular Cylindrical Shells 15th

An Extended Separation-of-Variable Method for the Eigenbuckl...

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15th International Conference on Vibration Problems (ICoVP)

作者： Yuan, Ye Xing, Yufeng Beihang Univ Inst Solid Mech Beijing 100083 Peoples R China

ISBN: (纸本)9789819959211;9789819959228

Thin-walled circular cylindrical shells are important components in diverse engineering fields. There have been extensive researches on the buckling of open circular cylindrical shells, but still few researches on analytical solutions for non-Levy boundary conditions (BCs). This work develops an extended separation-of-variable (eSOV) method for eigenbuckling analysis of open circular cylindrical shells with arbitrary homogenous BCs. In this eSOV method, buckling mode functions are the product of eigenfunctions of two coordinate directions, and critical buckling loads corresponding to two-direction eigenfunctions are independent of each other. By employing Rayleigh principle, two eighth-order characteristic differential equations are derived, and the two-direction eigenfunctions are expressed in terms of the eigenvalues of the corresponding characteristic differential equations, then closed-form mode functions and explicit equations for critical load are achieved. The results in this work are validated by numerical methods, and several interesting phenomena are found.

关键词： Open thin cylindrical shells Eigenbuckling Closed-form solution

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