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Units of Measurement

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

 

A
AC - Alternating current. An electric current that reverses its direction of flow periodically as contrasted to direct current (DC).
 
AMP - Ampere. The measure of the number of electrons flowing past a given point in an electrical conductor in a given amount of time; this is the electrical current.
 
B
Bbl - Barrel. A volumetric unit of measure for crude oil and petroleum products equivalent to 42 U.S. gallons.
 
Bcf - Billion cubic feet
 
Btu - British thermal unit. One Btu is the quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit. (one Btu = 1055 Joules)
 
C
Ccf - A unit of measurement for natural gas and water. Short for hundred cubic feet. Used to record the water use of a customer in a billing period. 1 CCF = 748 gallons.
 
Celsius - A temperature scale that registers the freezing point of water at 0° and the boiling point as 100° under normal atmospheric conditions.
 
Cf - Cubic foot. The most comon measurement of gas volume. The amount of gas required to fil a volume of one cubic foot under stated conditions of temperature and pressure and can be measured in thousands, millions, billions or trillions.
 
D
DC - Direct current. Electricity that flows continuously in one direction as contrasted with alternating current (AC).
 
Dth - Dekatherm. A unit of heat equal to 10 Therms or one million Btu's.
 
E
EHV - Extra high voltage. Generally any voltage of 345,000 volts or higher. Giga One billion
 
F
Fahrenheit
 
G
gW - Gigawatt. One thousand megawatts (1,000 MW), or one million kilowatts (1,000,000 kW), or one billion watts (1,000,000,000 watts) of electricity.
 
gWh - Gigawatthour is equal to one million KWH.
 
GJ - Giga-Joules
 
H
Heat Rate - A measure of generating station thermal efficiency, generally expressed in Btu per net kilowatthour. Computed by dividing the total Btu content of fuel burned for electric generation by the resulting net kilowatthour generation.
 
Hertz - The frequency with which an alternating current waveform rises and falls (changes polarity).
 
I
No Listing at this time
 
J
Joule - (kJ+MJ): A unit of measurement of energy equal to a watt-second. kJ represents a kilojoule (1,000 joules); 1055 Joules is equal to 1 BTU.
 
K
Kilo - Prefix used to denote 1,000 units
 
Kilowatthours Per Capita - Net generation in the U.S. divided by national population, or the corresponding ratio for any other area.
 
Kvar - Kilovar. 1,000 reactive voltamperes
 
kV - KiloVol. Unit of electric potential equal to 1,000 volts
 
KVA - Kilovolt-ampere; the unit used to express apparent power. A unit of measure for power consumption used for equipment that is not resistive such as motors, computers, and most non-incandescent lighting.
 
kW - Kilowatt
 
kWh - Kilowatt hour
 
L
No listing at this time
 
M
Mbbl - Thousand barrels
 
Mcf - One thousand cubic feet
 
Mega - Prefix used to denote 1,000,000 units.
 
Mgal - 1000 gallons. Unit of measurement used to record the water use of a customer in a billing period.
 
MMcf - One million cubic feet
 
MMDt - One trillion Btu's or equivalent to a Bcf (millio Mcf)
 
MW - Megawatt. One megawatt equals one million watts.
 
MWe - Megowatts of electric power
 
MWh - Megawatt hour
 
MWth - Megawatts of thermal power
 
N
No listing at this time
 
O
Ohm - Unit of measurement of electrical resistance. The resistance of a circuit in which a potential difference of 1 volt produces a current of 1 ampere.
 
P
Peak Watt - A manufacturer's unit indicating the amount of power a photovoltaic cell or module will produce at standard test conditions (normally 1,000 watts per square meter and 25 degrees celsius).
 
Perm - The measurement of water vapor through different materials measured in perm-inch (mass of water vapor moving through a unit area in unit time).
 
ppm - Parts per million
ppmv - Parts per million by volume
 
psia - Pressure, pounds per square inch (absolute)
 
psig - Pressure, pounds per square inch (gauge)
 
Q
Quad - Unit of energy of 1 quadrillion British thermal units
 
Quadrillion Btu - Equivalent to 10 to the 15th power Btu (1015 Btu)
 
R
No listing at this time
 
S
Short Ton - A unit of weight equal to 2,000 pounds
 
T
Tcf - A trillion cubic feet of natural gas, equivalent in energy content to 1.03 quads.
 
Therm - A unit equal to 100,000 Btu's.
 
Trillion Cubic Foot - A volume measurement of natural gas approximately equivalent to one Quad.
 
U
No listing at this time
 
V
Var - Unit of reactive power
 
Volt - Unit of electromotive force, analogous to water pressure in pounds per square inch.
 
Voltage - The "pressure" of electrical flow.
 
vol% - Percent by volume
 
W
Watt (Electric) - Measure of total electrical output. Watts = Volts x Amps
 
Watt (Thermal) - A unit of power in the metric system expressed in terms of energy per second, equal to the work done at a rate of 1 joule per second.
 
Wavelength - The distance between two successive peaks of a waveform. For example, waves in the sea may be spaced about 100m apart; wavelength is therefore about 100m.
 
Wh - Watthour. Electrical energy unit of measure equal to 1 watt of power supplied to, or taken from, an electric circuit steadily for 1 hour.
 
wt% - Percent by weight
 
X
No Listing at this time
 
Y
No Listing at this time
 
Z
No Listing at this time