coil

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coil:

see inductorinductor,
electric device consisting of one or more turns of wire and typically having two terminals. An inductor is usually connected into a circuit in order to raise the inductance to a desired value.
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; solenoidsolenoid
, device made of a long wire that has been wound many times into a tightly packed coil; it has the shape of a long cylinder. If current is sent through a solenoid made of insulated wire and having a length much greater than its diameter, a uniform magnetic field will be
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.

Coil

One or more turns of wire used to introduce inductance into an electric circuit. At power line and audio frequencies a coil has a large number of turns of insulated wire wound close together on a form made of insulating material, with a closed iron core passing through the center of the coil. This is commonly called a choke and is used to pass direct current while offering high opposition to alternating current.

At higher frequencies a coil may have a powdered iron core or no core at all. The electrical size of a coil is called inductance and is expressed in henries or millihenries. In addition to the resistance of the wire, a coil offers an opposition to alternating current, called reactance, expressed in ohms. The reactance of a coil increases with frequency. See Inductor

coil

[kȯil]
(control systems)
Any discrete and logical result that can be transmitted as output by a programmable controller.
(electromagnetism)
A number of turns of wire used to introduce inductance into an electric circuit, to produce magnetic flux, or to react mechanically to a changing magnetic flux; in high-frequency circuits a coil may be only a fraction of a turn. Also known as electric coil; inductance; inductance coil; inductor.
(science and technology)
An arrangement of flexible material into a spiral or helix.

Coil

One or more turns of wire used to introduce inductance into an electric circuit. At power line and audio frequencies a coil has a large number of turns of insulated wire wound close together on a form made of insulating material, with a closed iron core passing through the center of the coil. This is commonly called a choke and is used to pass direct current while offering high opposition to alternating current.

At higher frequencies a coil may have a powdered iron core or no core at all. The electrical size of a coil is called inductance and is expressed in henries or millihenries. In addition to the resistance of the wire, a coil offers an opposition to alternating current, called reactance, expressed in ohms. The reactance of a coil increases with frequency. See Inductor, Reactor (electricity)

heat exchanger

A device designed to transfer heat between two physically separated fluids; generally consists of a cylindrical shell with longitudinal tubes; one fluid flows on the inside, the other on the outside.

coil

1. an electrical conductor wound into the form of a spiral, sometimes with a soft iron core, to provide inductance or a magnetic field
2. the transformer in a petrol engine that supplies the high voltage to the sparking plugs
References in periodicals archive ?
Another interesting aspect of some of the works is the subtlety of coiled decorations which allow glaze to blend into the background for added visual effects.
The April 2003 Nashville Gas installation was the first use of coiled PA-11 pipe.
The use of the coiled pipe greatly increased the speed at which the pipe was installed.
To include three-strand coiled coils, the PairCoil motif-recognition program evolved into the more versatile MultiCoil version.
When they applied the LearnCoil program to databases of sequences, the researchers found evidence of coiled coils in fusion proteins associated with a wide variety of disease-causing viruses, including the influenza virus, Moloney murine leukemia virus, HIV, simian immunodeficiency virus, and visna virus.
The coiled pipe installation cost $1,590 less for the 1,000-foot job, for a gross saving of $1.
The staging area required for a coiled pipe installation can be as short as 50 feet for as much as a 1,000-foot installation.
Coiled coils include cell-surface proteins, muscle fibers and structural proteins in bone and hair, but many are so long that they defy crystallization, says Tom Alber of the University of Utah in Salt Lake City, who supervised the crystallography work in the new study
This acquisition is complementary to our existing business, strengthens our leadership position in the liftboat market and establishes Superior as the Gulf of Mexico market leader in coiled tubing with more units (36) than any other provider operating in the Gulf," said Terry Hall, Superior's Chairman, President and CEO.
Their innovation in liftboat and coiled tubing design as well as their operational leadership will enable us to grow our business.
Used in conjunction with specialized equipment manufactured by Hydra Rig, a division of Varco, coiled tubing enables oil and gas producers to quickly, efficiently and safely access wells to perform stimulation operations to boost production.
This acquisition complements Varco's comprehensive offering of coiled tubing technology, combining coiled tubing with the equipment required to run it," remarked George Boyadjieff, CEO and chairman of the board of Varco International Inc.