Convert Delisle (°De) to Rankine (°R)
Conversion:
1 Delisle (°De) = 670.47 Rankine (°R)
How to Convert Delisle (°De) to Rankine (°R)
1 de = 670.47 r
1 r = 558.89166667 de
Example: convert 15 Delisle (°De) to Rankine (°R):
25 de = 641.67 r
Delisle (°De) to Rankine (°R) Conversion Table
| Delisle (°De) | Rankine (°R) |
|---|---|
| 0.01 de | 671.658 r |
| 0.1 de | 671.55 r |
| 1 de | 670.47 r |
| 2 de | 669.27 r |
| 3 de | 668.07 r |
| 5 de | 665.67 r |
| 10 de | 659.67 r |
| 20 de | 647.67 r |
| 50 de | 611.67 r |
| 100 de | 551.67 r |
| 1000 de | -528.33 r |
Delisle (°De)
Definition
Delisle (°De) is an inverted temperature scale where 0°De equals the boiling point of water and 150°De equals the freezing point. Higher values indicate colder temperatures.
History
The Delisle scale was invented in 1732 by Joseph-Nicolas Delisle, a French astronomer. It was used in Russia for nearly a century before being replaced by the Celsius and Réaumur scales.
Current use
The Delisle scale is no longer used in everyday practice. It appears in historical scientific literature and is of interest in the study of the history of thermometry and temperature measurement.
Rankine (°R)
Definition
Rankine (°R) is an absolute temperature scale where 0°R equals absolute zero (−459.67°F). Each Rankine degree equals one degree Fahrenheit.
History
The Rankine scale was proposed in 1859 by William John Macquorn Rankine, a Scottish physicist and engineer. It was designed as the Fahrenheit-based equivalent of the Kelvin scale for use in thermodynamic engineering.
Current use
Rankine is used primarily in American engineering and thermodynamics, particularly in the aerospace and HVAC industries. Some US engineering textbooks and thermodynamic tables reference Rankine temperatures.