Wyniki wyszukiwania - BazTech

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Resistance and safety of the railway transport system in the context of disruptions occurring during rail freight transportation

Szaciłło Lucyna, Krześniak Mirosław, Zgorzelski Rafał, Lasota Michał, Franke Piotr

Transport Problems

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2024

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T. 19, z. 2

191--204

EN

This article presents an approach to planning rail freight transport taking into account the disruptions that occur during their implementation. The issues raised are related to the multi-aspect perception of factors influencing the organization of transport, in which immunity and safety play significant roles. The authors present an analysis of disruptions relating to the causes and effects of adverse events for selected traffic and operational parameters, including delays of freight trains in Poland from 2019-2022. The analysis of adverse events (accidents and serious accidents) in the rail transport system made it possible to present the rates of accidents when crossing tracks in prohibited places, at crossings on the public and separate networks, related to signals passed at danger events, and related to track works and the technical condition of rolling stock. In the case of the effects of adverse events, a rate was determined for freight train delays. The authors also developed a method for determining the value of disruptions in rail freight transport. A case study containing disruption quantification for a given freight train route is presented. The article emphasizes that a significant challenge in the rail transport sector is the proper organization of the operational activities of railway carriers concerning disruptions occurring during transport.

2

A multifaceted approach to assessing intermodal transport

Nehring Karol, Lasota Michał, Zabielska Aleksandra, Jachimowski Roland

Zeszyty Naukowe. Transport / Politechnika Śląska

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2023

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z. 121

141--165

EN

The article presents the issues of land intermodal transport, taking into account their impact on the natural environment. The subject of the research is the use of the ELECTRE I method as a decision support tool in the assessment of various variants of transport, taking into account intermodal transport, i.e., transport on the initial and final sections of the route with the use of road transport and transport in the middle longest section by rail transport. This significantly reduces the emission of harmful compounds emitted into the atmosphere by the transport industry. In connection with the above, research on the possibility of choosing transport routes using mixed modes of land transport has been presented. The analyzed transport from point A to destination B considers two reloading operations at the land intermodal terminals. For each of the variants, indicators related to emissions from fuel consumption, the total time and cost of the process, the share of rail transport in the entire process, and the distance of road transport were calculated. The final analysis of the results shows that the following parameters had the most significant impact on the course of the research: the level of carbon dioxide emissions into the atmosphere and the total cost of the process for a given variant. Based on the conducted research, it can be concluded that the variant of transporting cargo from Rybnik to Świdnik with reloading at the PCC Intermodal terminals in Gliwice and the Lublin Container Terminal turned out to be the most advantageous solution.

3

Evaluation of the efficiency of the delivery process in the technical object of transport infrastructure with the application of a simulation model

Zabielska Aleksandra, Jacyna Marianna, Lasota Michał, Nehring Karol

Eksploatacja i Niezawodność

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2023

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Vol. 25, no. 1

art. no. 1

EN

The article presents the issue of assessing the effectiveness of the implementation of a logistics process with the use of a simulation model and queue theory. The process that has been analyzed is the process of goods’ delivery at the technical object. Firstly, a literature review was carried out. Next, the authors described the process using the QT (Queueing Theory). This was possible due to the fact that QT is widely used in the analysis of systems as well as the assessment of their effectiveness, maintenance, and reliability. The description, characteristics and graphic presentation of the system in which the process is carried out have been included in the study too. Then the process was implemented in the computer simulation environment. Simulations were carried out and four variants of the system operation were analyzed. The comparison of the operating parameters of the system for each variant allowed for a detailed analysis of its operation and the influence of selected factors on the implementation of the process as well as it effectiveness or reliability.

4

Research and analysis of the operation of vehicles with various propulsion systems, including costs and CO2 emissions

Lasota Michał, Zabielska Aleksandra, Jacyna Marianna, Żak Jolanta

Combustion Engines

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2023

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R. 62, nr 4

3--13

EN

The article analyzes and evaluates costs, transport time and CO2 emissions by selected vans. The research was carried out on the example of three models of Iveco Daily vehicles powered by: diesel oil, electricity and compressed natural gas (CNG). The result of the research presented in the article is the determination of the operating costs of vehicles powered by various energy sources and the level of CO2 emissions. The comparative analysis was carried out on real data for the established transport task. Vehicles with engines powered by compressed natural gas are characterized by the highest savings in terms of transport costs. As the authors pointed out, this may be due to the fact that this type of engines, despite the low interest of buyers at the moment, may gain much more popularity in the future. On the other hand, in relation to vehicles with electric motors, the cost of transport is the highest, which means that this type of technology is ineffective in relation to long-distance transport.

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Technical, legal, and business conditionings of the functioning of rail operators in the freight transport market

Krześniak Mirosław, Jacyna Marianna, Wasiak Mariusz, Lasota Michał, Wawryszczuk Róża

Prace Naukowe Politechniki Warszawskiej. Transport

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2022

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z. 135

101--114

EN

In the article, the authors presented the technical, technological, legal, and business conditions of the functioning of rail freight transport in the international transport market. The authors analyzed the literature, considering this area's most important national and international normative documents. An essential element of the considerations is the presented schematic concepts of models for various forms of rail freight transport. The main ways of organizing freight transport at the eastern border were also indicated. The reasons for barriers that negatively affect the competitiveness of rail transport with other modes of transportation, especially in international transport, were shown. The rail transport market has undergone many changes recently, including investments in railway infrastructure, the growing importance of intermodal transport, and support for a more sustainable transport system. The article indicates the reasons for the occurrence of barriers that negatively affect the possibilities of further development of railways and the competitiveness of rail transport with other modes of transportation, especially in international transport.

6

Shaping Cross-Docking Facilities in Dairy Supply Chains®

Zabielska Aleksandra, Jacyna Marianna, Lewczuk Konrad, Lasota Michał

Postępy Techniki Przetwórstwa Spożywczego

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2022

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nr 2

202--213

EN

The article presents variants of shaping cross-docking facilities in which products from the dairy industry are served. Due to the type of goods, it is important to shorten the supply chain, as the products quickly turn sour or change consistency. The cross-docking method is defined as the distribution of goods, which eliminates the stage related to product storage in the supply chain. The goods go from suppliers to the facility, where they are properly consolidated and then directly shipped to a given recipient, in accordance with his order. The technical object aims to simplify the network of connections between them. Thanks to the cross-docking solution, it is possible to obtain shorter order fulfillment times and reduce the costs associated with the storage of goods. The use of appropriate technology in a cross-docking facility improves the flow of cargo, increases process safety and improves efficiency. Considering the dairy industry products, you should also pay attention to the rules and legal regulations that play a very important role in the transport of goods in order to maintain the cold chain.

PL

W artykule przedstawiono warianty kształtowania obiektów cross-dockingowych, w których obsługiwane są produkty z branży mleczarskiej. Ze względu na rodzaj towaru ważne jest skrócenie łańcucha dostaw, ponieważ produkty w niekontrolowanych warunach szybko kwaśnieją lub zmieniają konsystencję. Metoda cross-docking definiowana jest jako dystrybucja towaru, która eliminuje etap związany z magazynowaniem produktów w łańcuchu dostaw. Towar trafia od dostawców do obiektu, gdzie jest odpowiednio konsolidowany, a następnie bezpośrednio wysyłany do danego odbiorcy, zgodnie z jego zamówieniem. Obiekt techniczny ma na celu uproszczenie sieci połączeń między nimi. Dzięki rozwiązaniu cross-docking możliwe jest uzyskanie krótszych czasów realizacji zamówień oraz obniżenie kosztów związanych z magazynowaniem towaru. Zastosowanie odpowiedniej technologii w obiekcie cross-dockingowym poprawia przepływ ładunków, zwiększa bezpieczeństwo procesu i poprawia wydajność. Mając na uwadze produkty branży mleczarskiej należy również zwrócić uwagę na zasady i regulacje prawne, które odgrywają bardzo ważną rolę w transporcie towarów w celu utrzymania łańcucha chłodniczego.