Duct
Encyclopedia
A duct may refer to:
- Duct (anatomy)Duct (anatomy)In anatomy and physiology, a duct is a circumscribed channel leading from an exocrine gland or organ.-Types of ducts:Examples include:-Duct system:...
, various ducts in anatomy and physiology - Duct (HVAC)Duct (HVAC)Ducts are used in heating, ventilation, and air conditioning to deliver and remove air. These needed airflows include, for example, supply air, return air, and exhaust air. Ducts also deliver, most commonly as part of the supply air, ventilation air...
, for transfer of air between spaces in a structure - Duct tapeDuct tapeDuct tape, or duck tape, is cloth- or scrim-backed pressure sensitive tape often sealed with polyethylene. It is very similar to gaffer tape but differs in that gaffer tape was designed to be cleanly removed, while duct tape was not. It has a standard width of and is generally silver or black...
, a kind of adhesive tapeAdhesive tapeAdhesive tape is one of many varieties of backing materials coated with an adhesive. Several types of adhesives can be used.-Types:Pressure sensitive tape... - Ducted fanDucted fanA ducted fan is a propulsion arrangement whereby a fan, which is a type of propeller, is mounted within a cylindrical shroud or duct. The duct reduces losses in thrust from the tip vortices of the fan, and varying the cross-section of the duct allows the designer to advantageously affect the...
, motor for aircraft - Electrical bus duct, a metal enclosure for busbarBusbarIn electrical power distribution, a bus bar is a strip of copper or aluminium that conducts electricity within a switchboard, distribution board, substation or other electrical apparatus....
s - Duct (industrial exhaust)Duct (industrial exhaust)Industrial exhaust ducts are pipe systems that connect hoods to industrial chimneys through other components of exhaust systems like fan, collectors etc...
, industrial exhaust duct system which are designed for low pressure-pneumatic convey of gas, fumes, dusts, shavings, and other pollutants from works space to atmosphere after cleaning and removal of contaminations. - Atmospheric ductAtmospheric ductIn telecommunication, an atmospheric duct is a horizontal layer in the lower atmosphere in which the vertical refractive index gradients are such that radio signals are guided or ducted, tend to follow the curvature of the Earth, and experience less attenuation in the ducts than they would if...
, a horizontal layer in the lower atmosphere in which the vertical refractive index gradients are such that radio signals (a) are guided or ducted, (b) tend to follow the curvature of the Earth, and (c) experience less attenuation in the ducts than they would if the ducts were not present- Tropospheric ducting, a type of radio propagation in the TroposphereTroposphereThe troposphere is the lowest portion of Earth's atmosphere. It contains approximately 80% of the atmosphere's mass and 99% of its water vapor and aerosols....
that allows signals to travel unusually long distances. - Earth-Ionosphere waveguideEarth-Ionosphere waveguideThe Earth–ionosphere waveguide refers to the phenomenon in which certain radio waves can propagate in the space between the ground and the boundary of the ionosphere.Because the ionosphere contains charged particles, it can behave as a conductor...
, a type of Atmospheric duct
- Tropospheric ducting, a type of radio propagation in the Troposphere
- Duct bank, a set of electrical conduitElectrical conduitAn electrical conduit is an electrical piping system used for protection and routing of electrical wiring. Electrical conduit may be made of metal, plastic, fiber, or fired clay. Flexible conduit is available for special purposes....
s, entering a buildingBuildingIn architecture, construction, engineering, real estate development and technology the word building may refer to one of the following:...
underground - Tear duct, which carry tears to the eyes
- Duct Publishing, an imprint of the German group VDM Publishing devoted to the reproduction of Wikipedia content