Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

P

423 results

P-type semiconductor

energy

A p-type semiconductor is a type of semiconductor used in solar cells

Public address system

marine

Loudspeakers in cabins, mess rooms, etc., and on deck via which important information can be broadcast from a central point, mostly from the navigation bridge.

Public spaces

marine

Those portions of the accommodation which are used for halls, dining rooms, lounges and similar permanently enclosed spaces, (SOLAS).

Public works

energy

Public works are a broad category of infrastructure projects, financed and constructed by the government, for recreational, employment, and health and safety uses in the greater community.

Pulverized coal-fired boiler

energy

A pulverized coal-fired boiler is an industrial or utility boiler that generates thermal energy by burning pulverized coal (also known as powdered coal or coal dust since it is as fine as face powder in cosmetic makeup) that is blown into the firebox.

Pulverizer

energy

A pulverizer or grinder is a mechanical device for the grinding of many different types of materials.

Pump

marine

A machine used to raise liquids from a low level to a higher one, or to provide liquid with an increase in energy enabling it to flow or build up a pressure.

Pump room

marine

A space, located in the cargo area, containing pumps and their accessories for the handling of ballast and fuel oil.

Pumped storage power plant

energy

A hydroelectric power plant that stores water above the level of the plant. During, usually, peak demand and therfore expensive electricity cost the water is released into another storage lower down. During off peak times the water is pumped back up to the upper water storage.

Pumpjack

energy

A pumpjack is the overground drive for a reciprocating piston pump in an oil well.

Pumpman

marine

The unlicensed member of the engine department. He is trained in all skills necessary to engine maintenance. Usually watchstander, but on some ships a day worker.

Pure car, truck carrier (PCTC)

marine

The PCTC is a purpose-built vessel for the transportation of different types of rolling cargo, such as new private cars and trucks, heavy construction equipment, and other heavy loads.

PureVent system

marine

Alfa Laval’s compact air separator designed to remove oil mist from crankcase gases with a cleaning efficiency of 99%.

PUREX

energy

PUREX (plutonium uranium reduction extraction) is a chemical method used to purify fuel for nuclear reactors or nuclear weapons.

Purging of cargo tanks with inert gas

marine

The introduction of inert gas into a tank already in the inert condition, with the purpose of further reducing the existing oxygen content...

Purification

marine

Separation of two intermixed and mutually insoluble liquid phases of different densities. Solids having a higher density than the liquids can be removed at the same time.

Purifier

marine

A separator that cleans the oil from water and solid particles with continuous removal of separated water.

Purse seiner

marine

A fishing vessel catching pelagic species by surrounding the shoals with purse seines.

Purse seiner/trawler LIBAS

marine

Norwegian shipyard Fitjar Mek Verksted AS completed the 94m fishing vessel LIBAS according to the design from Vik-Sandvik AS, who developed a new hull form for a speed of 20 knots in loaded conditions.

Pyranometer

energy

A pyranometer is a type of actinometer used for measuring solar irradiance on a planar surface and it is designed to measure the solar radiation flux density (W/m2) from the hemisphere above within a wavelength range 0.3 μm to 3 μm.

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