Rocks & mirror

WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

D

348 results

Dangerous goods

marine

All substances of an inflammable nature which are liable to spontaneous combustion either in themselves or when stowed next to other substances and, when mixed with air...

Dangerous goods classes

marine

Classes of dangerous goods according to SOLAS (Chapter VII, Part A), the BC-Code and the IMDG-Code, are as follows:

Danish Institute of Fire and Security Technology (DIFT)

marine

A modern fire laboratory equipped to carry out fire tests according to all European and international standards. More than 1000 fire tests are carried out in the laboratory every year.

Darrieus wind turbine

energy

Efficient "egg beater" VAWT wind turbine invented by Frenchman Georges Darrieus.

Data acquisition

energy

Data acquisition is the process of sampling signals that measure real world physical conditions and converting the resulting samples into digital numeric values that can be manipulated by a computer.

Data logger

energy

A data logger is an electronic device that records data over time or in relation to location either with a built in instrument or sensor or via external instruments and sensors.

Data sheet

energy

A data sheet is a document that summarizes the performance and other characteristics of a product, machine, component (e.g., an electronic component), material, subsystem (e.g., a power supply), or software in sufficient detail that allows a buyer to understand what the product is and a design engineer to understand the role of the component in the overall system.

Datum

energy

A datum reference is some important part of an object, (such as a point, line, plane, hole, set of holes, or pair of surfaces) that serves as a reference in defining the geometry of the object and (often) in measuring aspects of the actual geometry

Daughter boat

marine

A fast support boat designed to be carried aboard a larger vessel. Standard boats are equipped with a special lifting arrangement with a steel frame for safe launch and recovery, and a release hook to fit a davit system.

Davits

marine

Lifting devices for handling lifeboats, rescue boats, liferafts, stores, hoses, etc. - Gravity davits – Davits which slide down and position a lifeboat for lowering as soon as they are released.

Daylight

energy

Daylight is the combination of all direct and indirect sunlight during the daytime.

Daylight harvesting

energy

Daylight harvesting systems use daylight to offset the amount of electric lighting needed to properly light a space, in order to reduce energy consumption.

Daylight saving time

energy

Daylight saving time (DST) is the practice of advancing clocks (typically by one hour) during warmer months so that darkness falls at a later clock time.

Daylighting

energy

Daylighting is the practice of placing windows, skylights, other openings, and reflective surfaces so that sunlight (direct or indirect) can provide effective internal lighting.

DC connector

energy

A DC connector (or DC plug) is an electrical connector for supplying direct current power.

DC injection braking

energy

DC injection braking is a method of slowing AC electric motors.

DC-to-DC converter

energy

A DC-to-DC converter is an electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another.

DDH plant

energy

Dynamic District Heating plant. DDH power plant is a multi-unit CHP plant that includes engines, boilers and pump modules.

De facto standard

energy

A de facto standard is a custom or convention that has achieved a dominant position by public acceptance or market forces.

De jure standard

energy

In law and government, de jure describes practices that are legally recognised, regardless of whether the practice exists in reality.

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