What is tfde vessel?
TFDE stands for Tri-Fuel diesel electric propulsion ships specifically for LNG carriers. Let us now see the general operational advantages from an Engineering point of view. 1. These ships have no Main propulsion diesel engine. They just have two small electrical motors.
What is Megi propulsion?
The MEGI diesel engine applies the principle of non-premixed combustion (the Diesel principle). The MEGI engine is equipped with additional safety systems that ensure a safe operation on gas without requiring rupture discs in the scavenge air receiver, the exhaust gas receiver, and in the exhaust gas piping.
What is DFDE engine?
Abbreviation for Dual Fuel Diesel Electric, a type of propulsion system used for LNG carriers. DFDE consumes heavy oil and natural gas in a diesel cycle to generate electricity. This electricity is used to drive the propeller for propulsion of the vessel, as well as to operate equipment for regasification.
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].
How does LNG ship engine work?
Most propulsion systems in LNG carriers use the BOG and liquid fuels. In a steam plant, the BOG is used to fire the boilers and produce steam. The steam drives the turbines and propels the ship. An alternative to the steam turbine engine is the dual-fuel marine diesel engine.
What does Megi mean?
MEGI
| Acronym | Definition |
|---|---|
| MEGI | Mobil Equatorial Guinea, Inc. |
| MEGI | Main Engine Gas Injection (Qatargas) |
What is methane slip?
Methane slip is the unburned methane from engines which is caused by two main reasons: Due to dead volume in form of crevices between cylinder unit components. Incomplete combustion in form of quenching at the coldest part of the combustion chamber when running lean.
How does LNG engine work?
Dual fuel mixed cycle engines use a lean premixed air-fuel mixture ignited by a substantial diesel pilot representing more than ~15% of the total fuel energy. Instead, natural gas is injected directly into the combustion chamber at high pressure in much the same way that is done in a diesel engine.
How do LNG powered ships work?
Most propulsion systems in LNG carriers use the BOG and liquid fuels. In a steam plant, the BOG is used to fire the boilers and produce steam. The steam drives the turbines and propels the ship. If there isn’t enough BOG, liquid fuel (heavy fuel oil or HFO) is used to keep the plant operating.
What is LNG fueled vessels?
Liquefied Natural Gas (LNG) is an environmentally friendly energy source that emits less carbon dioxide than coal or oil. Natural gas is cooled to minus 162 degrees Celsius which turns it into a liquid. Liquefaction reduces the volume to 1/600 of that of gas and enables it to be transported in large quantities by sea.
