Rankine scale

For the idealized thermodynamic cycle for a steam engine, see Rankine cycle. For the scale measuring recovery after stroke, see modified Rankin scale.

Rankine temperature conversion formulae

	from Rankine	to Rankine
Celsius	[°C] = ([R] − 491.67) × 5⁄9	[R] = [°C]+273.15 × 9⁄5
Fahrenheit	[°F] = [R] - 459.67	[R] = [°F] + 459.67
Kelvin	[K] = [R] × 5⁄9	[R] = [K] × 9⁄5
For temperature intervals rather than specific temperatures, 1 R = 1 °F = 5⁄9 °C = 5⁄9 K Comparisons among various temperature scales

Rankine is a thermodynamic (absolute) temperature scale named after the Scottish engineer and physicist William John Macquorn Rankine, who proposed it in 1859. (The Kelvin scale was first proposed in 1848.)

The symbol for degrees Rankine is R^[1] (or Ra if necessary to distinguish it from the Rømer and Réaumur scales). Zero on both the Kelvin and Rankine scales is absolute zero, but the Rankine degree is defined as equal to one degree Fahrenheit, rather than the one degree Celsius used by the Kelvin scale. A temperature of −459.67 °F is exactly equal to 0 R.

Some engineering fields in the U.S. measure thermodynamic temperature using the Rankine scale.^[2] However, throughout the entire scientific world thermodynamic temperature is measured in Kelvin.^[2] The US National Institute of Standards and Technology does not recommend using degrees Rankine in NIST publications.^[1]

Some key temperatures relating the Rankine scale to other temperature scales are shown in the table below.

	Kelvin	Celsius	Fahrenheit	Rankine
Absolute zero (by definition)	0 K	−273.15 °C	−459.67 °F	0 R
Freezing point of water[3]	273.15 K	0 °C	32 °F	491.67 R
Triple point of water (by definition)	273.16 K	0.01 °C	32.018 °F	491.688 R
Boiling point of water[4]	373.1339 K	99.9839 °C	211.97102 °F	671.64102 R

Conversion table between the different temperature units

References

1. ^ ^{a b} B.8 Factors for Units Listed Alphabetically from Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 edition, Ambler Thompson and Barry N. Taylor
2. ^ ^{a b} http://www.physorg.com/tags/temperature/
3. ^ The ice point of purified water has been measured to be 0.000089(10) degrees Celsius - see Magnum, B.W. (June 1995). "Reproducibility of the Temperature of the Ice Point in Routine Measurements" (PDF). Nist Technical Note 1411. http://www.cstl.nist.gov/div836/836.05/papers/magnum95icept.pdf. Retrieved 2007-02-11. 
4. ^ For Vienna Standard Mean Ocean Water at one standard atmosphere (101.325 kPa) when calibrated solely per the two-point definition of thermodynamic temperature. Older definitions of the Celsius scale once defined the boiling point of water under one standard atmosphere as being precisely 100 °C. However, the current definition results in a boiling point that is actually 16.1 mK less. For more about the actual boiling point of water, see VSMOW in temperature measurement.

See also

• Comparison of temperature scales

This standards- or measurement-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Units of temperature Standards and measurement stubs Wikimedia Foundation. 2010. Игры ⚽ Нужно сделать НИР? Racial profiling Rabbinical Assembly Look at other dictionaries: Rankine scale — Rankino skalė statusas T sritis fizika atitikmenys: angl. Rankine scale vok. Rankine Skala, f rus. шкала Ранкина, f pranc. échelle de Rankine, f …   Fizikos terminų žodynas Rankine scale — noun a scale of absolute temperature in Fahrenheit degrees; the freezing point of water is 491.69 degrees and the boiling point of water is 671.69 degrees • Hypernyms: ↑temperature scale * * * Rankine scale, a scale in which temperatures are… …   Useful english dictionary Rankine scale — Ran·kine scale (rangґkin) [William John Macquorn Rankine, Scottish engineer and physicist, 1820–1872] see under scale …   Medical dictionary Rankine scale — (R) an absolute scale on which the incremental unit of measurement corresponds with that of the Fahrenheit scale, so that the ice point is at 491.67 degrees Rankine (°R) …   Medical dictionary Rankine scale — n. scale of absolute temperature that uses the same degrees as those of the Fahrenheit scale (freezing point of water is 491.69 degrees and the boiling point of water is 671.69 degrees) …   English contemporary dictionary rankine scale — Name given the absolute (Fahrenheit) scale. Zero (00R) on this scale is 4600F …   Dictionary of automotive terms Rankine — may refer to: * Rankine cycle, a thermodynamic heat engine cycle * Rankine scale, an absolute temperature scale used mostly by US engineers * William John Macquorn Rankine (1820–1872), a Scottish engineer and physicist who proposed both of the… …   Wikipedia Rankine — /rang kin/, n. 1. William John Macquorn /meuh kwawrn /, 1820 70, Scottish engineer and physicist. adj. 2. Thermodynam. pertaining to an absolute temperature scale (Rankine scale) in which the degree intervals are equal to those of the Fahrenheit… …   Universalium Rankine — n. family name; William Rankine (1820 1872), Scottish engineer and physicist, namesake for Rankine temperature scale; unit of temperature on the Rankine scale …   English contemporary dictionary Rankine — /ˈræŋkən/ (say rangkuhn) adjective 1. denoting or relating to an absolute scale of temperature based on the Fahrenheit degree. One degree Rankine equals 5/9 kelvin. –noun 2. the Rankine scale. Symbol: R {named after William John Macquorn Rankine …   18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”