Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

B

329 results

Bend test

marine

A test to measure the ductility of a metal sample by folding it over a specified radius. No cracking or other defects should be found.

Bending load

marine

An external load that produces bending stresses within a body.

Bending moment

marine

The result of vertical forces acting on a ship as a result of local differences between weight and buoyancy. The total of these forces should be zero, otherwise change of draft will occur.

Bentonite grout

energy

A common grout mix used to protect aquifers from ground or cross contamination and ensure good contact between loop and surrounding soil.

Berth

marine

1. A place assigned to a vessel when anchored or lying alongside a pier, etc. 2. A bunk or bed.

Berth (to)

marine

To bring a ship into a berth or arrive at a berth.

Berthing

marine

Approaching and securing a vessel in a harbour, along a quayside (berth).

Best practice

energy

A best practice is a method or technique that has been generally accepted as superior to any alternatives because it produces results that are superior to those achieved by other means or because it has become a standard way of doing things, e.g., a standard way of complying with legal or ethical requirements.

Beta decay

energy

Beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide.

Beta particle

energy

A beta particle is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.

Betavoltaic device

energy

A betavoltaic device (betavoltaic cell or betavoltaic battery) is a type of nuclear battery which generates electric current from beta particles (electrons) emitted from a radioactive source, using semiconductor junctions.

Betz limit

energy

The maximum power coefficient (Cp = 59.3) of a theoretically perfect wind turbine as described by scientist Albert Betz.

Bevel

marine

The angle between the flanges of a frame or other member.

Big end

marine

The larger end of a connecting rod, i.e. where it joins the crankpin of the crankshaft.

Bight

marine

A loop formed by doubling back a rope upon itself.

Bilge

marine

1. The intersection of bottom and side. 2. The lower parts of holds and machinery spaces where bilge water may accumulate.

Bilge alarm, 15 ppm bilge alarm

marine

Regulation 16(5) of Annex I of MARPOL 73/78 stipulates that the oil content of the effluent from oily water separator should not exceed 15 parts of oil per million parts of water.

Bilge blocks

marine

Supporting blocks used under the bilge for support during the vessel construction or dry-docking.

Bilge keels

marine

Fixed longitudinal plates fitted at the turn of the bilge so that their drag dampens roll amplitudes.

Bilge main, main bilge line

marine

Part of the bilge system between the bilge pump and the bilge suction chest. Cofferdams, duct keels and tunnels, if fitted, should be provided with bilge suctions led to the main bilge line.

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