Definition

1. Noun:
   • A thermodynamic temperature scale: The Rankine scale is an absolute scale of thermodynamic temperature. It uses degrees Fahrenheit as its unit increment, meaning each degree Rankine is equal to one degree Fahrenheit. Absolute zero on this scale is 0 °R.

Usage

• The Rankine scale is primarily used in specific engineering fields within the United States, particularly in thermodynamics and some aerospace applications, where calculations require an absolute temperature system consistent with Fahrenheit units.
• It is defined such that 0 °R is absolute zero, the theoretical point where all molecular motion ceases. The freezing point of water (32 °F) is 491.67 °R, and the boiling point of water (212 °F) is 671.67 °R.

Examples

• Noun:
  • The engine's exhaust temperature was calculated to be 1250 degrees Rankine.
  • To convert from Fahrenheit to Rankine, simply add 459.67 to the Fahrenheit temperature.

Advanced Usage

• "Rankine cycle": A model used to predict the performance of steam turbine systems. While this is a compound term, it is the primary practical application where the Rankine scale is relevant.
  • The efficiency of the power plant was analyzed using the principles of the Rankine cycle.

Variants and Related Words

• Rankine (°R): The symbol for a degree on the Rankine scale.
• Absolute temperature: A temperature measurement relative to absolute zero, of which the Rankine and Kelvin scales are examples.
• Thermodynamic scale: A temperature scale independent of the properties of any specific material.

Synonyms

• There are no direct synonyms for "Rankine scale" as a proper noun naming a specific system. Related conceptual synonyms include:
  • Absolute temperature scale (general category).

Notes on Meaning

• The Rankine scale is analogous to the Kelvin scale but uses Fahrenheit-degree increments instead of Celsius-degree increments. While both scales start at absolute zero, 0 K = 0 °R, but their unit sizes differ (1.8 °R = 1 K).
• It is named after the Scottish engineer and physicist William John Macquorn Rankine.

Noun

1. 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