Wyniki wyszukiwania - BazTech

1

Review of hydrogen-based propulsion systems in the maritime sector

Kołodziejski Marcin

Archives of Thermodynamics

|

2023

|

Vol. 44, no 4

335--380

EN

The maritime industry is undergoing a technology transition that aims to increase the use of low-emission fuels. There is a significant trend visible of new ships being ordered with alternative fuel propulsion. In the future shipping’s fuel market will be more diverse and it will rely on multiple energy sources. One of the very promising ways to meet the International Maritime Organisation’s decarbonization requirements is to operate ships with sustainable hydrogen propulsion. One of the possible options to limit greenhouse gases emissions is the production of low-carbon ‘green’ hydrogen by water electrolysis using low-carbon electricity. This hydrogen can then be used directly in fuel cells to produce electricity or in the internal combustion engines, without having a carbon impact and pollutant emissions. Hydrogen can also be converted into its derivatives. This paper presents a review of recent studies of ships’ hydrogen propulsion systems, different aspects of production, transportation, storage, and using liquid/gaseous H2 and its derivatives as a fuel in the shipping industry. H2 propulsion in maritime transport is still in the experimental phase. In most cases, these experiments serve as a kind of platform for evaluating the applicability of different technological solutions. This article presents existing ships’ hydrogen and its derivates propulsion systems, projects, and existing conceptual studies.

2

Possibilities of using hydrogen buses in urban transport

Kołodziejski Marcin, Matuszak Zbigniew, Żabińska Iwona

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

|

2022

|

z. 161

53--64

EN

Purpose: The aim of this paper is to present the possibilities of using hydrogen buses in urban transport taking into account technological, economic and environmental conditions. Design/methodology/approach: Analysis of international literature, Polish literature and reports related to the development of alternative energy sources in vehicles and urban transport development. Findings: The Polish government to achieve the environmental requirements of the European Union obliges local government units to ensure the share of zero-emission buses in the fleet of vehicles in use. On the basis of the conducted analysis we can say that a significant advantage of hydrogen vehicles is the total lack of emissions, a long range of up to 350-400 km and short charging times. However, a significant problem is insufficient infrastructure - not enough hydrogen stations. Despite this difficulty, more and more manufacturers are interested in producing hydrogen vehicles, and investors are seriously considering the costs and benefits of zero-emission buses. Unfortunately, none of the economic analyses that have been commissioned by Polish companies providing transport services have shown the viability of using hydrogen buses. Originality/value: The paper shows the global trends in the development of city buses with particular attention to hydrogen buses.

3

Permit to work and risk analysis as an element of safety management systems applied on oil and gas installations

Kołodziejski Marcin

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska

|

2022

|

z. 160

327--346

EN

Purpose: To present the Permit to Work procedures used as a part of safety management systems applied on offshore oil and gas installations. Design/methodology/approach: The analysis of Permit to Work systems and the Task Risk Assessments/Safety Job Analysis based on the current international regulations and guidance. Findings: Permit to Work system is a process requiring continuous development and contribution from all parties involved in the activities carried out on the offshore oil and gas installations. Research limitations/implications: Legal regulations and guidance only give a framework for development of the Permit to Work System thus there is no uniformity between the systems applied by various oil and gas operators. Practical implications: International Safety Watchdogs could provide better guidance for development of the Permit to Work Systems. This would allow uniformity between different oil and gas companies. Social implications: PTW systems allows elimination or at least mitigation of risk associated with potentially dangerous activities carried out on the offshore installations. Originality/value: Recommendation to uniform Permit to Work Systems and to implement Dynamic Risk Assessment into Permit to Work Systems.