Convert Rankine (°R) to Delisle (°De)

Convert from
Convert to

Conversion:

1 Rankine (°R) = 558.89166667 Delisle (°De)

How to Convert Rankine (°R) to Delisle (°De)

1 r = 558.89166667 de

1 de = 670.47 r

Example: convert 15 Rankine (°R) to Delisle (°De):

25 r = 538.89166667 de

Rankine (°R) to Delisle (°De) Conversion Table

Rankine (°R)Delisle (°De)
0.01 r559.71666667 de
0.1 r559.64166667 de
1 r558.89166667 de
2 r558.05833333 de
3 r557.225 de
5 r555.55833333 de
10 r551.39166667 de
20 r543.05833333 de
50 r518.05833333 de
100 r476.39166667 de
1000 r-273.60833333 de

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.

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.