Updated 22 Oct 2019

Diesel Engine Overview

Internal combustion engines were first used for ships in 1912 but took more than 50 years to fully replace steam engines. Early…

Updated 22 Oct 2019

Two-Stroke Diesels

Large marine engines are impressive examples of the engineer’s art and have improved in thermal efficiency over time to…


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Updated 22 Oct 2019

NOx control measures in two-strokes

The development of electronic engine control has allowed the two-stroke to meet the challenges posed by the NOx Code. However,…

Updated 22 Oct 2019

Four-Stroke Diesels

In recent years it would seem that most technology advances have taken place on two-stroke engines. In part this is due to the…

Updated 22 Oct 2019

Dual-fuel and gas engines

LNG-burning engines have been used for onshore power generation for many years but their use for marine purposes is a more…

Updated 22 Oct 2019

Turbochargers

Although shipowners are often accused of ignoring demands for increased efficiency unless obliged to do so by regulation, the…

Updated 22 Oct 2019

Turbine Power Systems

Two varieties of turbines are found on ships: steam turbines, which are external combustion systems, and gas turbines which are…

Updated 22 Oct 2019

Batteries and Fuel Cells

For some time now, there has been intense discussion about the ability of shipping to decarbonise. In 2018, IMO adopted an…

Updated 22 Oct 2019

Extra power sources and systems

Partly to meet EEDI requirements but mostly in a genuine desire to reduce fuel use, shipowners are enthusiastically embracing…

Updated 22 Oct 2019

Transmissions

Between the engine and the final propulsor, three basic means are available to transmit the power from one to the other(s):…

Updated 22 Oct 2019

Propulsors

The final component of the drive system is the propulsor, of which there are many types. After paddle wheels became obsolete…

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