| A |
AC - Alternating
current. An electric current that reverses its direction
of flow periodically as contrasted to direct current (DC).
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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.
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| B |
Bbl - Barrel.
A volumetric unit of measure for crude oil and petroleum
products equivalent to 42 U.S. gallons.
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Bcf - Billion
cubic feet
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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)
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| 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.
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Celsius - A
temperature scale that registers the freezing point of
water at 0° and the boiling point as 100° under
normal atmospheric conditions.
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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.
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| D |
DC - Direct
current. Electricity that flows continuously in one direction
as contrasted with alternating current (AC).
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Dth - Dekatherm.
A unit of heat equal to 10 Therms or one million Btu's.
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| E |
EHV - Extra
high voltage. Generally any voltage of 345,000 volts or
higher. Giga One billion
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| F |
Fahrenheit
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| 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.
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gWh - Gigawatthour
is equal to one million KWH.
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GJ - Giga-Joules
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| 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.
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Hertz - The
frequency with which an alternating current waveform rises
and falls (changes polarity).
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| I |
No Listing at this time
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| 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.
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| K |
Kilo - Prefix
used to denote 1,000 units
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Kilowatthours Per Capita
- Net generation in the U.S. divided by national population,
or the corresponding ratio for any other area.
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Kvar - Kilovar.
1,000 reactive voltamperes
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kV - KiloVol.
Unit of electric potential equal to 1,000 volts
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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.
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kW - Kilowatt
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kWh - Kilowatt
hour
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| L |
No listing at this time
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| M |
Mbbl - Thousand
barrels
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Mcf - One thousand
cubic feet
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Mega - Prefix
used to denote 1,000,000 units.
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Mgal - 1000
gallons. Unit of measurement used to record the water
use of a customer in a billing period.
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MMcf - One million
cubic feet
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MMDt - One trillion
Btu's or equivalent to a Bcf (millio Mcf)
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MW - Megawatt.
One megawatt equals one million watts.
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MWe - Megowatts
of electric power
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MWh - Megawatt
hour
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MWth - Megawatts
of thermal power
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| N |
No listing at this time
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| 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.
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| 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).
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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).
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ppm - Parts
per million
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ppmv - Parts
per million by volume
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psia - Pressure,
pounds per square inch (absolute)
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psig - Pressure,
pounds per square inch (gauge)
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| Q |
Quad - Unit
of energy of 1 quadrillion British thermal units
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Quadrillion Btu
- Equivalent to 10 to the 15th power Btu (1015 Btu)
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| R |
No listing at this time
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| S |
Short Ton -
A unit of weight equal to 2,000 pounds
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| T |
Tcf - A trillion
cubic feet of natural gas, equivalent in energy content
to 1.03 quads.
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Therm - A unit
equal to 100,000 Btu's.
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Trillion Cubic Foot
- A volume measurement of natural gas approximately equivalent
to one Quad.
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| U |
No listing at this time
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| V |
Var - Unit of
reactive power
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Volt - Unit
of electromotive force, analogous to water pressure in
pounds per square inch.
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Voltage - The
"pressure" of electrical flow.
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vol% - Percent
by volume
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| W |
Watt (Electric)
- Measure of total electrical output. Watts = Volts x
Amps
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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.
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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.
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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.
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wt% - Percent
by weight
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| X |
No Listing at this time
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| Y |
No Listing at this time
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| Z |
No Listing at this time
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