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Wyszukujesz frazę "LNG-powered ships" wg kryterium: Wszystkie pola


Wyświetlanie 1-2 z 2
Tytuł:
Estimation of global liquefied natural gas use by sea-going ships
Autorzy:
Chłopińska, Ewelina
Tatesiuk, Jakub
Śnieg, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/1818753.pdf
Data publikacji:
2021
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
liquefied natural gas
LNG-powered ships
demand
SECA areas
bunker fuel
forecast
Opis:
Environmental pollution is a growing concern for many organizations, commissions, state governments, and companies. The use of fossil fuels in transportation contributes significantly to increased emissions of harmful sulfur oxides (SOx) and nitrogen oxides (NOx). Maritime transport, as one of the largest emitters of such harmful compounds, has encountered many emission restrictions and legal limitations. These include the creation of areas of strict exhaust gas control (ECA). According to the MARPOL Convention, Annex VI, Special Emission Control Areas have been in force since 01.01.2015, and they include the following areas: the Baltic Sea, North Sea, North America (covering the designated coasts of the USA and Canada and portions of the Caribbean Sea near the USA). According to current regulations, vessels providing services in ECAs are required to maintain sulphur oxide emissions that do not exceed 0.1%. The introduction of new regulations results in costs that have to be covered by shipowners. To meet these standards, the two most popular methods are the use of special flushing systems (scrubbers) and low-sulphur fuels (e.g., LNG). This publication addresses the use of LNG as fuel for the main propulsion of sea-going vessels operating in areas covered by strict sulphur emission controls. It also presents LNG demand forecasts for various ship types, as well as possible solutions satisfying the Sulphur Directive. The purpose of this paper is to present a way to determine the size of the global demand for LNG. The percentage of vessels powered by LNG and other fuels was used as a basis for estimating global LNG demand in shipping until 2030.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2021, 66 (138); 28-33
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the application of cold energy of largescale LNG-powered container ships to refrigerated containers
Autorzy:
Li, Yajing
Li, Boyang
Deng, Fang
Yang, Qianqian
Zhang, Baoshou
Powiązania:
https://bibliotekanauki.pl/articles/2033271.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
LNG-powered container ship
LNG cold energy utilization
refrigerated container
cold storage
Opis:
With the aim of considering the problem of excess fuel cold energy and excessive power consumption of refrigerated containers on large LNG-powered container ships, a new utilisation method using LNG-fuelled cold energy to cool refrigerated containers in cargo holds is proposed in this study, and the main structure of the cold storage in the method is modelled in three dimensions. Then, combined with the different conditions, 15 different combination schemes of high temperature cold storage and low temperature cold storage are designed to utilise the cold energy of LNG fuel, the exergy efficiency and cold energy utilisation rate calculation model of the system is established. The simulation tool ‘Aspen HYSYS’ is used to simulate and calculate the exergy efficiency and cold energy utilisation rate of the system under 15 combinations, verifying the feasibility of the scheme. According to the characteristics of such a ship’s cross-seasonal navigation routes and the number of refrigerated containers loaded in different ports, the combination schemes of the number of low-temperature cold storage and high-temperature cold storage are selected. Thus, the average exergy efficiency and cold energy utilisation rate of the whole line is obtained, which proves that LNG-powered container ships could effectively utilise the cold energy of LNG. By calculating the total electric energy consumed by refrigerated containers on the whole sailing route, before and after the adoption of the LNG cold energy method, it is found that the adoption of this new method can promote the realisation of energy saving and emission reduction of ships.
Źródło:
Polish Maritime Research; 2021, 4; 107-121
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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