Browsing by Author "Yuksek, Yagmur Atescan"

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    Data-driven environmental sustainability of supply chain for medical equipment
    (Elsevier, 2024-01-12) Yuksek, Yagmur Atescan; Afy-Shararah, Mohamed; Salonitis, Konstantinos
    Sustainable supply chain of medical equipment is challenging due to the inherent importance of having health-related components in-stock whilst balancing the economic and environmental impact of that. In general, to minimize the environmental impact of inventory management, physical inventory space and transportation amount can be lowered. However, in medical equipment, shortage of medical materials, and supplies could cause delays in providing adequate healthcare services. Therefore, effective inventory management is required to maintain a steady supply while minimizing the environmental and economic impact of supply chain. This study is aimed at assessing the environmental and economic impact of inventory for a medical equipment manufacturer. Inventory classification of the medical equipment manufacturer is performed using ABC analysis. After inventory classification using ABC, safety stock analysis is performed. Obtained inventory results are analysed both in terms of environmental sustainability using Life Cycle Assessment (LCA) approach and in terms of economic impact calculating cost of holding safety stock. An LCA model is created based on transportation of procurements. Impact assessment is performed to define most environmentally and economically impactful suppliers of the medical equipment manufacturer.
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    Environmental impact assessment of manufacturing of SiC/SiC composites
    (Springer Nature, 2025-01-07) Karadimas, Georgios; Yuksek, Yagmur Atescan; Salonitis, Konstantinos
    SiC/SiC composites have attracted increasing attention in various applications such as turbine blades, exhaust nozzles, and combustor chambers, due to their exceptional mechanical and thermal properties. However, the environmental impact of these composites across their life cycle is an important aspect that needs to be evaluated to support their responsible development and use. In this study, a life cycle assessment of SiC/SiC woven laminate ceramic matrix composites to quantify their environmental impacts from cradle-to-gate was conducted. Three different manufacturing methods to produce SiC/SiC woven laminates were researched: chemical vapour infiltration (CVI), pyrolysis of a preceramic polymer (PIP), and melt infiltration (MI). The Life Cycle Assessment approach was utilized to identify the effect outcomes for each process, analysing the raw material extraction, raw material processing, and final product manufacturing phases to develop the environmental impact assessment. The study's outcome showed that CVI had the lowest average environmental impact between the two methods.
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    A unit product energy mapping framework for operation management in manufacturing industries
    (Elsevier, 2024-05-07) Yuksek, Yagmur Atescan; Haddad, Yousef; Cox, Rylan; Salonitis, Konstantinos
    Sustainability has emerged as a primary concern across a wide range of industries, particularly in manufacturing due to its energy-intensive nature. To understand the environmental impact of manufacturing processes and make them less detrimental to the environment users monitor and track energy consumption data. Although this approach is valuable in assessing the overall impact, energy consumption mapping needs to be conducted per product to compare and assess different process strategies. Available research in literature, provides unit process energy consumption models in isolation from manufacturing operations, neglect of machine and operational variations, and limited consideration of detailed data acquisition for indirect energy consumption. This paper presents a comprehensive framework designed to address the existing gaps in the literature on energy consumption mapping within the manufacturing industry. The proposed framework provides a solution by offering a structured approach to data collection, analysis, and utilization within manufacturing processes, aiming to achieve two main outcomes: the calculation of embodied energy per unit product and the provision of systematically analysed data for operation management to enhance energy efficiency. Four key steps constitute the framework: data acquisition, simulation and modelling, impact assessment, and operation management. The data acquisition step involves the identification of manufacturing process flows, equipment specifics, and process parameters, emphasizing machine operation requirements and power readings. These elements are systematically logged into a database providing essential information for both embodied energy calculation and simulation purposes. Results obtained from simulations are subjected to analysis in the impact assessment step to assess embodied carbon and overall environmental impacts. The collective findings from the first three steps are then utilized for operation management.