Analysis and assessment of environmental threats in maritime transport

Deja, Agnieszka; Ulewicz, Robert; Kyrychenko, Yaroslav

doi:10.1016/j.trpro.2021.07.078

Cited by 22 publications

(7 citation statements)

References 16 publications

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“…The development of sustainable transport and freight transport systems has become one of the main drivers of transport policy measures. In addition to the environmental impact, one of its fundamental pillars is the economic impact, which is a key element of the entire energy sector (Deja et al, 2021). Most research considers it an indispensable fact that the economic impact of road freight needs is constantly increasing, and this is also true for social and environmental impacts, all in Spain (Alesis et al, 2014) and, within this, Catalan region (Aza et al, 2010).…”

Section: Literature Reviewmentioning

confidence: 99%

Statistical analysis of road freight transport in Catalonia

Boldizsár

2022

Production Engineering Archives

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This article describes the links between economic level, investment in Research & development (R&D), and Catalan freight transport between 2006 and 2016. Catalonia is the second most populous area in Spain, northeast of the Iberian Peninsula, whose economy ranks second among the Autonomous Communities, surpassed only by the Community of Madrid, to speak of a significant economic and social region. The study sought to answer the question of what economic contexts exist in the region regarding freight transport. To do all this, it uses mathematical-statistical tools to explore the relationships between real data sets, which were calculated using seven indicators. The analyses suggest a positive increase in the volume of imports and exports of goods in the region. The same is true for GDP per capita. It came as a surprise that virtually no positive correlations existed between R&D and any other indicators. In analysing the indicators, we found that the current economy was pushed back by the 2008 world economic change, similarly to international trends. At the same time, there has been rapid growth since 2010, especially in exports. This also means that Spain, particularly the Catalan region, has serious trade relations, which affect the region’s economic development and the freight transport industry.

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Section: Literature Reviewmentioning

confidence: 99%

Statistical analysis of road freight transport in Catalonia

Boldizsár

2022

Production Engineering Archives

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“…It currently accounts for 95% of world trade transit [2]. This means of transport is considered environmentally hazardous, due to the pollution of the marine sector as a consequence of ongoing operations, accidents [3], [4], and gases emitted from burning fuel (generally heavy fuel oil (HFO)) [5], which is composed of: carbon dioxide (CO2), sulfur oxides (SOx), nitrogen oxides (NOx), carbon oxide (CO), hydrocarbons (HC) and particulate matter [1], [6]. This has been maintained for many years due to the absence of innovation in environmentally friendly fuels and the low implementation of renewable energy sources in this sector [5].…”

Section: Introductionmentioning

confidence: 99%

Computational Comparison of AC and DC Motors to Hydrodynamic Changes in Marine Fishing Vessels

Correa¹,

Muñoz²,

Díaz³

et al. 2023

TecnoL.

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The objective of this article is to make a comparison in a computational environment between an alternating current motor and a direct current motor is made for dynamic variations in the propulsion of an artisanal fishing boat. Initially, the boat was simulated in the Maxsurf software to obtain the dynamic behaviors for pitching, rolling, yawing, and heave motions with wind and wave perturbations for a Pierson Moskowitz spectrum. Subsequently, the motors are selected and in Matlab/Simulink software and a torque behavior required by the vessel to act on the resistance presented in each dynamic motion is proposed. This allows for analyzing the required mechanical and electrical conditions, using the curves obtained in the simulation. Finally, it is concluded that taking into account the criteria of torque, power, speed, and current, the results obtained show that the DC motor is more efficient than the three-phase AC motor for artisanal fishing vessel applications. In addition, the two motors require greater effort to overcome the disturbance related to the rolling motion in the steady-state, while in the transient state the DC motor requires a higher starting torque and the AC motor presents oscillations, which are undesirable disturbances because they produce instability in the electrical system. Additionally, it is important to take into account the energy source that feeds the motors, which can be alternating current or direct current.

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“…Rapid prototyping is a technique that supports both the design and implementation processes of new solutions. This significantly saves energy [10][11][12] and reduces environmental impact [13]. However, depending on the rapid prototyping technology used, it often involves unsatisfactory accuracy and quality [14], which often requires finishing processing.…”

Section: Introductionmentioning

confidence: 99%

Geometrical Accuracy of Flexspline Prototypes Made by FDM/MEM Methods

PACANA

2023

Quality Production Improvement and System Safety

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Abstract. This article presents an analysis of the geometrical accuracy of flexspline prototypes that were a component of harmonic drive. To produce the test models, a MEM (Melting and Extrusion Modeling) method was used. This additive method allows the production of elements with very complicated shapes from various polymeric materials. As the test model, a flexspline made of ABS (acrylonitrile-butadiene-styrene) was assumed. Such a special gear with a complicated construction was chosen, because its unique design allows one to obtain clear conclusions from the analysis. To expand the scope of research, models of flexspline with four different construction solutions were made and tested. As a step of the analysis, contact measurements were performed for several flexspline models on the coordinate measuring machine to check their dimensions. The verification of the geometrical accuracy of flexspline models will allow to assess the usefulness of additive methods for the production of prototypes and finished products.

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Analysis and assessment of environmental threats in maritime transport

Cited by 22 publications

References 16 publications

Statistical analysis of road freight transport in Catalonia

Statistical analysis of road freight transport in Catalonia

Computational Comparison of AC and DC Motors to Hydrodynamic Changes in Marine Fishing Vessels

Geometrical Accuracy of Flexspline Prototypes Made by FDM/MEM Methods

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