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Impacts of Using Exhaust Gas Recirculation and Various Amount of Dimethyl Ether Premixed Ratios on Combustion and Emissions on a Dual-Fuel Compression Ignition Engine

Stepanenko Denys, Rudnicki Jacek, Kneba Zbigniew

Advances in Science and Technology. Research Journal

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2024

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Vol. 18, no 2

196--213

EN

In the presented research, the authors dealt with the specific properties of the combustion process of dimethyl ether (DME) in a combustion car (Volkswagen Golf IV) engine AJM 1.9 TDI PDE made by Volkswagen factory. Dimethyl ether is an alternative fuel produced most often from natural gas, which can be used in compression ignition engines as a single fuel or co-burned with diesel oil. This work describes the impacts of using exhaust gas recirculation system and various diesel to DME substitution ratios from 0% to approximately 25% (on an energy basis), on the combustion process in a dual-fuel diesel engine. The engine has been modified so that DME fuel is introduced into the intake manifold just before the intake valves. The diesel fuel supply system, operation algorithms of the engine electronic control unit and other engine elements were left unchanged as it was built by the manufacturer

2

Ways of adjusting the two-stroke diesel engine to be run on liquefied natural gas

Giernalczyk Mariusz, Łoński Filip, Kaniak Wojciech

New Trends in Production Engineering

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2018

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Vol. 1, Iss. 1

317--324

EN

This article attempts at assessing the feasibility and validity of adjusting the two-stroke diesel engine to be fuelled by liquefied natural gas (LNG). It discusses a set of modifications introduced onto one of the ships carrying liquefied natural gas. These changes consisted in adjusting the engines of the main drive so that they can be fuelled by gas. This has been achieved by the modification of the cylinder head and fuel supply installation. Parameter results of the modified engines obtained during sea trials have been presented. Both advantages and disadvantages resulting from gas combustion have been pointed out. Ultimately, the authors of this article assess the applicability of this solution to other LNG carriers.

3

Alternative propulsion plants for modern LNG carriers

Grzesiak Szymon

New Trends in Production Engineering

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2018

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Vol. 1, Iss. 1

399--407

EN

This paper shows the latest evolution trends of propulsion plants of modern LNG tankers. Features of conventional and advanced steam plants were confronted with propulsion plants such as Dual Fuel - Diesel electric and plants equipped with slow speed two stroke diesel engines. Propulsion plants were compared in terms of plant efficiency, reliability and environmental. The shipyard’s order book and the active fleet of LNG carriers with a capacity above 65000 m3 were analyzed.

4

Ocena porównawcza silników dwupaliwowych o zapłonie samoczynnym w układach napędowych zbiornikowców LNG

Adamkiewicz A., Behrendt C.

Nafta-Gaz

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2012

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R. 68, nr 1

41-49

PL

W artykule uzasadniono potrzebę konfrontacji cech silników głównych gazowców, posługując się ewolucją zastosowania różnych rodzajów paliw zasilających te silniki. Zdefiniowano wskaźniki efektywności masowo-gabarytowe, energetyczne i energetyczno-ekologiczne. Rozpatrzono cechy silników o zapłonie samoczynnym, zasilanych jednym i dwoma rodzajami paliw. Oszacowano wartości kluczowych wskaźników efektywności. W oparciu o zidentyfikowane zbiory wskaźników przeprowadzono analizę porównawczą cech silnika dwupaliwowego z jednopaliwowymi.

EN

The paper justified the need to confront the features of the main engines gas carriers, using the evolution of the use of different types of fuels supplied to those engines. Mass-dimensions, power and environmentally friendly energy effectiveness indicators have been defined. The characteristics of diesel engines, powered by one and two types of fuels have been examined. The values of key performance indicators have been estimated. On the basis of the identified sets of indicators a comparative analysis of the characteristics of dual fuel engines with single fuel ones was conducted.

5

Trendy rozwoju układów napędowych gazowców LNG

Chądzyński W.

Zeszyty Naukowe / Akademia Morska w Szczecinie

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2006

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nr 10 (82)

139-150

PL

Zdolności przewozowe światowej floty gazowców LNG rosną gwałtownie, a ilość zamówień na nowe statki wzrasta bardzo dynamicznie. Niewykluczone, że budowa gazowców LNG zostanie podjęta także w naszym kraju. W niniejszej pracy zostaną przedstawione wymagania, jakie stawiane są przed układem napędowym gazowca LNG, sposoby wykorzystania naturalnych ubytków LNG podczas rejsu, warianty możliwych do zastosowania układów napędowych wraz z ich cechami eksploatacyjnymi, szkic założeń do badań nad optymalnym rozwiązaniem układu napędowego w powiązaniu z wielkością statku.

EN

The global LNG shipping capacity is growing sharply and the number of ordered LNG carriers is very high at the moment. It is possible that Poland will appear among experienced builders of those ships. The author considers the requirements for propulsion systems of modern LNG carriers, the methods of utilising boil-off gas, different alternatives of power sources. Besides, the paper introduces a preliminary idea of research on an optimal solution of propulsion system closely related with the size of the vessel.