Power Engineering Dictionary( 电气工程词典）

Most of us have been confronted with at least a few elements of such a barrier from time to time. I attached some below, if you are interested in or want nore, contact me at Ken.zhang#consultant.com

ADVECTION - The transfer of heat by horizontal movement of air.
AERATION - Exposing to the action of air, like blowing air through water before discharging to a river.
AERATION CELL - (see oxygen cell)
AEROBIC - A condition in which "free" or dissolved oxygen is present in water.
AERODYNAMIC NOISE - Also called generated noise, self-generated noise; is noise of aerodynamic origin in a moving fluid arising from flow instabilities. In duct systems, aerodynamic noise is caused by airflow through elbows, dampers, branch wyes, pressure reduction devices, silencers and other duct components.
AGGLOMERATE - The clustering together of a few or many particles into a larger solid mass.
AGITATOR - A device used to cause motion in confined fluids.
AIR - A substance containing by volume approximately 78 - 79% nitrogen; 20.95% oxygen, .94% argon, traces of carbon dioxide, helium, etc.
AIR BLAST TRANSFORMER - A transformer cooled by forcing a circulation of air around its windings.
AIR CAPACITOR - Is a capacitor, which uses air as the dielectric between the plates.
AIR CHANGES - A method of expressing the amount of air leakage into or out of a building or room in terms of the number of building volumes or room volumes exchanged.
AIR CLEANER - A devise used to remove air borne impurities.
AIR COIL - Coil on some types of heat pumps used either as an evaporator or a condenser.
AIR CONDITIONER - They are basically refrigeration devices cooling air and rooms rather then food compartments.
AIR CONDITIONER, UNITARY - An evaporator, compressor, and condenser combination; designed in one or more assemblies, the separate parts designed to be assembled together.
AIR CONDITIONING -The process of treating air to simultaneously control its temperature, humidity, cleanliness, and distribution to meet the requirements of the conditioned space.
AIR CONDITIONING UNIT - An assembly of equipment for the treatment of air so as to control, simultaneously, its temperature, humidity, cleanliness and distribution to meet the requirements of a conditioned space.
AIR CONDITIONING, COMFORT - The process of treating air so as to control simultaneously its temperature, humidity, cleanliness and distribution to meet the comfort requirements of the occupants of the conditioned space.
AIR COOLER - A factory-encased assembly of elements whereby the temperature of air passing through the device is reduced.
AIR DIFFUSER - A circular, square, or rectangular air distribution outlet, generally located in the ceiling and comprised of deflecting members discharging supply air in various directions and planes, and arranged to promote mixing of primary air with secondary room air.
AIR DIFFUSION AERATORS - They are aerators into which air is pumped into the water through perforated pipes, plates, or any other method.
AIR DUCT - A tube or conduit for conveying air from one place to another.
AIR FLOTATION - A process of accelerating sedimentation, by introducing air into the water, this lowers the density of the water, and increases the differences in the densities of the water and the suspended particles. (DAF), Dissolved Air Flotation.
AIR GAP -The space between magnetic poles, or between the rotating and stationary assemblies in a motor or generator.
AIR HANDLER - The fan blower, heat transfer coil, filter, and housing parts, of a system.
AIR INFILTRATION – The leakage of air into a room through cracks in doors, windows, and other openings.
AIR PURGE - The removal of undesired matter by replacement with air.
AIR SATURATED - Moist air in which the partial pressure of the water vapor is equal to the vapor pressure of water at the existing temperature. This occurs when dry air and saturated water vapor coexist at the same dry-bulb temperature.
AIR SENSING THERMOSTAT - A thermostat unit, in which the sensing element is located in the refrigerated space.
AIR STANDARD - Air having a temperature of (20°C), a relative humidity of 36 percent, and under a pressure of 14.70 PSIA. The gas industry usually considers (16°C) as the temperature of standard air.
AIR VENT - Valve, either manual or automatic, to remove air from the highest point of a coil or piping assembly.
AIR WASHER - A water spray system or device for cleaning, humidifying, or dehumidifying the air.
AIR, AMBIENT - Generally the air surrounding the object.
AIR, DRY - Air without contained water vapor.
AIR, OUTDOOR - Air taken from outdoors and, therefore, not previously circulated through the system.
AIR, RECIRCULATED - Return air passed through the conditioner before being again supplied to the conditioned space.
AIR, REHEATING - In an air conditioning system, the final step in treatment, in the event the temperature is too low.
AIR, RETURN - Air returned from conditioned or refrigerated space.
AIRBORNE SOUND - Sound which reaches the point of interest by radiation through the air.
AIR-COOLED CONDENSER - Heat of compression is transferred from condensing coils to surrounding air. This may be done either by convection or by a fan or blower.
AIR-SENSING THERMOSTAT – A thermostat unit, in which the sensing element is located in the refrigerated space.
ALCOHOL BRINE - A water and alcohol solution, which remains as a liquid below 0°C.
ALGAE - A minute fresh water plant growth which forms a scum on the surfaces of recirculated water apparatus, interfering with fluid flow and heat transfer. Lower form of plant life, usually green and blue green algae appear in cooling water systems. They are responsible for copious amounts of stringy green slime masses.
ALIVE - A term referring to a circuit in which a current is flowing. Also referred to as live.
ALKALI - A substance having marked basic properties. Applying to hydroxides of potassium, sodium, lithium, and ammonium. They turn red litmus to blue. Includes hydroxides of the alkaline earth metals of barium, strontium, and calcium.
ALKALINE - Having a pH greater than 7.
ALKALINE BOIL-OUT - Employed to remove oil and grease deposits from heating surfaces.
ALKALINITY - An expression of the total basic anions (hydroxyl groups) present in a solution. It also represents, particularly in water analysis, the bi-carbonate, carbonate, and occasionally, the borate, silicate, and phosphate salts which will react with water to produce the hydroxyl groups.
ALLEN TYPE SCREW - A screw with a recessed hex shaped head.
ALLOY - A substance having metal properties and being composed of two or more chemical elements of which at least one is a metal.
ALLOY STEEL - Steel containing specific quantities of alloying elements (other than carbon)and commonly accepted amounts of manganese, copper, silicon, sulfur, and phosphorus).
ALTERNATING CURRENT (AC) - Electric current in which the direction of the current alternates or reverses. In a 60 Hertz (cycle) current, the direction of current flow reverses in 1/120th of a second; most commonly used current.
ALTERNATOR - A device which converts mechanical energy, into alternating current.
ARCHIMIDES PRINCIPAL - States that an upward force acting on a body wholly or partly submerged in a fluid, is equal to the weight of the fluid displaced, and acts through the center of gravity of the fluid displaced, or the center of buoyancy.
ARMATURE - the rotating part of an electric motor or generator. The moving part of a relay or vibrator.
ARMATURE AIR GAP - The air space between the stationary and rotating parts of a motor or generator, through which magnetic lines of force pass.
ARMATURE BACK AMPERE TURNS - The magnetic field produced by current flowing in the armature winding, that opposes and reduces the number of magnetic lines of force, produced by the field magnets of a motor or generator.
ARMATURE BAR - Copper bars used in place of wire windings, in large armatures, generators, or motors.
ARMATURE CIRCUIT - The path that the current takes, in flowing through the windings from one brush to another.
ARMATURE COIL - The loop or coil of copper wire, placed on the armature core, and forming part of the winding.
ARMATURE CORE -The laminated iron part of the armature, formed from thin sheets or disks of steel, on which the windings are placed.
ARMATURE CURRENT - The current flowing from the armature of a generator, to the armature of a motor. Not including the current taken by the shunt field.
ARMATURE DEMAGNETIZATION - The reduction in the effective magnetic lines of force, produced by the armature current.
ARMATURE REACTION - The effect, that the magnetic field produced by the current flowing in the armature, has on the magnetic field produced by the field coils.
ARMATURE REGULATING RESISTORS - Are resistors, designed to regulate the speed or torque of a loaded motor, by placing a resistance in the armature or power circuit.
ARMATURE RESISTANCE - The resistance of the wire used in the windings of the armature, measured between the rings or brushes, or from positive to negative terminals.
ARMATURE SLOT -The groove or slot in the armature core, into which the coils or windings are placed.
ARMATURE TESTER - Any device used for locating faults or defects in the armature winding.
ARMATURE VARNISH - Is a liquid put on the field and armature windings, to improve the insulation of the cotton covering on the wires.
ARMATURE WINDING - All of the copper wire placed on the armature, and through which the current flows.
AROMATICS - A group of hydrocarbons of which benzene is the parent. They are called "aromatics" because many of their derivatives have sweet or aromatic odorous.