Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

M

253 results

Medium-speed engine

marine

An internal combustion engine operating within the range from 250 rev/min to about 1200 rev/min.

Megawatt

energy

Electric power unit equal to one million watts

Megawatt hour (MWh)

energy

Electric power unit equal to one million watts used for one hour.

Megohmmeter

energy

A Megohmmeter or insulation resistance tester is a special type of ohmmeter used to measure the electrical resistance of insulators.

Melting

energy

Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid.

Melting point

energy

The melting point of a substance is the temperature at which it changes state from solid to liquid.

Membrane BioReactor (MBR)

marine

Wärtsilä Hamworthy’s MBR technology is an advanced wastewater treatment process based on biological degradation and membrane separation.

Membrane containment system of HANJIN MUSCAT

marine

Built in 1999 by Hanjin Heavy Industries Co Ltd, Korea, LNG tanker HANJIN MUSCAT has four cargo tanks contained in a complete double-hull structure, which includes ship sides and bottom, transverse bulkheads and upper deck trunk.

Membrane technology

marine

The membrane technology was developed by the naval engineering firms Gaz Transport and S.N. Technigaz for the transport of liquid methane by sea.

Membrane type Nitrogen Generator System

marine

Built in Japan at the Namura yard, the methanol carrier MILLENNIUM EXPLORER is equipped with the world largest ship-based nitrogen generator system.

Membrane-type LNG cargo containment system

marine

Membrane systems exploit the double hull of the ship as the supporting structure on which a cryogenic liner – performing the two functions of gas tightness and thermal insulation – is applied.

Memorandum of Understanding on Port State Control (MOU)

marine

Agreements on port state control signed in several regions of the world by the coastal states ; 1982 Paris MOU for the European region, 1992 Latin America agreement, 1993 Tokyo MOU for the East Asia region, etc.

Mercury-wetted slip rings

energy

Mercury-wetted slip rings, noted for their low resistance and stable connection use a different principle which replaces the sliding brush contact with a pool of liquid metal molecularly bonded to the contacts.

Mermaid propulsion unit

marine

The Rolls-Royce’ s podded propulsor developed by Kamewa and Alstom and available from 5 to 25MW.

Mesoscale meteorology

energy

Mesoscale meteorology is the study of weather systems smaller than synoptic scale systems but larger than microscale and storm-scale cumulus systems.

Messenger line

marine

A light line attached to the end of a main mooring line and used to assist in heaving the mooring to the shore or to another ship.

Messroom

marine

Dinning room for officers or crew.

Metacentre M (initial transverse metacentre)

marine

When a ship floating at rest in still water is inclined by an external force to a small angle fi, the centre of buoyancy shifts from B to the new position – Bfi.

Metacentric height

marine

The vertical distance between G and M is referred to as the metacentric height. The relative positions of vertical centre of gravity G and the initial metacentre M are extremely important with regard to their effect on the ship’s stability.

Metal

energy

A metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well.

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