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Tombak M. L., Tapaninen U., Palu R.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2023

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Vol. 17 No. 4

973--980

EN

Baltic Sea maritime transport makes up about 15% of all cargo globally transported via sea, which makes it one of the busiest maritime areas all over the world [1]. At the same time shipping operations create environmental pressures to the air, discharges of oil, sewage from passenger ships as well as invasion of alien organisms from ships’ ballast water or hulls [2]. In order to move from assessment of discharges from one ship to a certain area, it is necessary to combine the discharge factors to the activity patterns [3]. In this study the shipping activities that have environmental impact in the Estonian sea area will be analysed. In addition, the activities will be related with their source of pollution (e.g., manoeuvring, anchoring, loading/unloading cargo) and the impact or consequences are analysed (e.g., emission to air (CO2, SOx, NOx) discharge to water (antifouling paints, scrubber water, ballast water, bilge water, black water), physical discharge (underwater noise) etc). Finally, we assess the relative importance of the environmental effect of shipping in Estonian waters.

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A method for assessing of ship fuel system failures resulting from fuel changeover imposed by environmental requirements

Kowalak Przemysław, Myśków Jarosław, Tuński Tomasz, Bykowski Dariusz, Borkowski Tadeusz

Eksploatacja i Niezawodność

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2021

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Vol. 23, no. 4

619--626

EN

Environmental regulations instigated the technological and procedural revolution in shipping. One of the challenges has been sulfur emission control areas (SECA) and requirement of fuel changeover. Initially, many reports anticipated that new grades of low sulfur fuels might increase various technical problems in ship operation. This research develops a simple and easy to use method of the failure severity and intensity assessment in relation to fuel changeover. The scale of failure rate in the ship’s fuel system was evaluated qualitatively and quantitively, using developed failure frequency indicator and the time between failure. Based on 77 records of fuel system failures collected on seven ships, it has been found that frequency of failures related to SECA fuel changeover is on average nearly three times higher compared to the rest of sailing time. Their severity did not significantly change, but the structure of failures changed considerably. The method and presented results may help in improvement of ship’s systems design and on-board operational procedures.

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Analiza układów napędowych zbiornikowców LNG w aspekcie spełnienia wymagań strefy kontroli emisji spalin

Adamkiewicz A., Cydejko J.

Rynek Energii

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2015

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Nr 3

80--86

PL

W artykule omówiono problematykę wymagań Aneksu VI konwencji MARPOL, koncentrując się na strefach kontroli emisji spalin. Wymagania poszczególnych stref opisano i skonfrontowano ze skutkami eksploatacji współczesnych gazowców. Pokazano zmiany w preferencjach dotyczących źródeł napędu zbiornikowców LNG. Przewidując dalszy wzrost wymagań wskazano możliwe kierunki rozwoju układów energetycznych gazowców, mając na uwadze szeroko rozumianą efektywność energetyczną, logistyczną i transportową. Zidentyfikowano czynniki determinujące własności eksploatacyjne poszczególnych typów zbiornikowców LNG.

EN

This paper discusses the issues of Annex VI of MARPOL convention requirements, focusing on Emission Control Areas. Demands of particular areas have been described and confronted with the consequences of present-day LNG carriers operation. The changes in preferences on the sources of LNG tanker propulsion have been shown. Foreseeing a further increase of requirements, possible directions of gas carriers’ power systems development have been indicated, with regard to the widely understood energy, logistic and transport efficiency. Factors determining performance properties of various types of LNG tankers have been identified.