دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: (A C) current in which the charge-flow periodically reverses and whose average value is zero. Compare direct current.

n: The current whose intensity and direction alter periodically with time.

n: a device for changing alternating current to direct current or vice versa;usually, if the device changes AC to DC, it is called a rectifier.

n: a vessel that receives an emulsion and resolves the emulsion to oil, water, and usually gas, by using heat, chemicals, and a high-voltage electric field. This field, produced by grids placed perpendicular to the flow of fluids in the treater, aids in breaking the emulsion. Also called an electrochemical treater. See emulsion treating.

a separation device that uses alternating current charged plates to help break emulsions.

.. n: a transformer loss caused by magnetism retained in the core of the transformer each time the alternating current is reversed. Some energy must be used to overcome the residual magnetism each time the current reverses.

n: magnetostriction vibration mainly caused by change of magnetic field, thus it causes change of magnetic material. The vibration that caused by alternating current through sympathetical steel magnet core, which force to bit, the speed higher than the trad

n: a device used to convert alternating current into direct current.

v: to change an alternating current to a direct current.

n: 1. a device with vanelike blades attached to a shaft. The device turns or rotates when the vanes are struck by a fluid directed there by a stator. 2. the rotating part of an induction-type alternating current electric motor.

n: It is revolving and its blading convert the hydrodynamic to mechanical energy .

n: a device that changes alternating current to direct current by means of a silicon control gate. Commonly called SCR or Thyristor.

n: a graphic mathematical representation of the wave form of alternating current or voltage.