What fuels does a steam powered LNG carrier use?

A marine LNG engine is a dual fuel engine that uses natural gas and bunker fuel to convert chemical energy in to mechanical energy.

Do ships still use steam power?

Nuclear powered ships and subs still use steam turbines. For most ships however, Gas turbines or diesel engines have replaced steam turbines since the 1980s.

How are LNG carriers powered?

The propulsion system of LNG ships is often powered by steam turbines driven by boil-off-gas (BOG) from LNG, boiled liquid fuels such as oil, or a combination.

What is the latest propulsion solution introduced to the LNG shipping industry?

3.5 COGES propulsion The gas turbine is an innovative option introduced on LNG vessels because of their dual fuel (gas and diesel oil) burning capability, high reliability derived from the aeronautical industry, high power/weight ratio, and excellent emission performance [16].

Do LNG tankers run on LNG?

In a typical 20-day voyage, anywhere from 2–6\% of the total volume of LNG originally loaded may be lost. Normally an LNG tanker is powered by steam turbines with boilers. These boilers are dual fuel and can run on either methane or oil or a combination of both.

How does steam propulsion work?

Most steam propulsion systems use a boiler to produce steam. The boiler burns fuel and then transfers the heat produced into circulating boiler water. Once the water is heated sufficiently it vaporizes into steam and can be used to power a steam engine that produces the mechanical energy that propels the ship.

Why do we need steam on ship?

Not only is steam required to compensate for the heat losses from fuel oil tanks, but steam is also used to heat the fuel oil to the required temperature before being used in the engine.

What is the advantage of using steam turbine to gas turbine?

In general, steam contains a high amount of enthalpy (especially in the form of heat of vaporization). This implies lower mass flow rates compared to gas turbines. In general, the turbine moves in one direction only, with far less vibration than a reciprocating engine.