Standard cubic foot – wikipedia

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See also: Standard Cubic Feet per Minute and Standard conditions for temperature and pressure

Standard cubic foot is a unit used mostly in natural gas industry to represent amount of natural gas. Estimate gas cost moving truck Per EIA [ clarification needed] glossary: Standard Cubic foot is the amount of natural gas contained at standard temperature and pressure (60 degrees Fahrenheit and 14.73 pounds standard per square inch) in a cube whose edges are one foot long.

A standard cubic foot (at 14.73 psi and 60 degree F ) is equivalent to 0.0283058557 standard cubic meters (at 101.325 kPa and 15 degrees Celsius ). Gas chromatography mass spectrometry Definitions [ edit ]

“A standard cubic foot of gas is defined as a cubic foot at a temperature of 21 °C (70 °F) and a pressure of 101.35 kilopascals (14.696 psia)”. Average fuel cost per mile [1] [2] Other base pressures and temperatures are sometimes used as well.

The standard cubic foot, in keeping with the ideal gas law, thus defines a standard unit of molecular quantity (not volume, as the name suggests).


Fuel cost calculator miles The conversion to quantity (scf to moles) is straightforward; one standard cubic foot represents 1.19804 moles (0.0026412 pound moles).

Since natural gas is a mix of various molecular species, chiefly methane but with varying proportions of other gases, a standard cubic foot does not represent a precise unit of mass.

Converting between standard volumes is not always straightforward. Costco gas station hours ann arbor For example, converting standard cubic feet to standard cubic meters (SCM) does not use the same ratio as converting cubic feet to cubic metres (1 cubic foot = 0.0283168466 cubic metres) because the standard temperature and pressure used are different. Calculate cost of gas mileage A standard cubic foot (using the convention of 14.73 psi and 60 degree F ) is equivalent to 0.0283058557 standard cubic meters (using the convention of 101.325 kPa and 15 degrees Celsius ).

In the natural gas industry where quantities are often expressed in standard cubic feet, large multiples of standard cubic feet are generally not expressed with Metric prefix, rather with prefixes based on roman numerals where the s for “standard” is often omitted. Average cost of gas per mile 2012 Common units of gas volumes include ccf (hundred standard cubic feet), Mcf (thousand standard cubic feet), MMcf (million standard cubic feet),. Average gas cost per mile [3] The M refers to the Roman numeral for thousand,two M’s would be one thousand thousand, or one million. How much would it cost in gas to drive Bcf (billion standard cubic feet), Tcf (trillion standard cubic feet), Qcf (quadrillion standard cubic feet), etc. Premium vs regular gas cost calculator are also used. How to calculate gas cost for taxes Converting Actual Volumes to Standard Volumes [ edit ]

An actual volume can be converted to a standard volume using the following equation: [4] [5]

Where, Vs: Standard Volume Va: Actual Volume ( sometimes shown as Vr for Registered Volume) Fp: Pressure Factor ( sometimes shown as Pm for Pressure Multiplier )

Fp= Absolute Pressure/Standard Pressure = ( Line Gauge Pressure + Atmospheric Pressure)/Base Pressure

Ft: Temperature Factor ( sometimes shown as Tm for Temperature Multiplier )

Ft= Absolute Standard Temperature/Absolute Line Temperature = [273.15 + Standard Temperature(deg C)]/[273.15 + Line Temperature (deg C)] or [459.67 + Standard Temperature(deg F)]/[459.67 + Line Temperature (deg F)]

(Fpv)2: Super Compressibility Factor (often omitted or shown as equaling 1)

Example: How many standard cubic feet are in 1 cubic feet of gas at 80 deg F and 50 psig? (assuming we have 13.6 psi atmospheric pressure and ignoring super compressibility)

Vs = 1 cubic foot * [(13.6 psi + 50psi)/ 14.73 psi ] * [(60F + 459.67 F)/ (80F + 459.67F) ]

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