What is a unit of heat in the Rankine system?

In the Rankine system, the unit of heat measurement that aligns with its temperature scale is the Rankine itself. The Rankine scale is an absolute temperature scale, similar to Kelvin, but it is based on the Fahrenheit degree increment. Thus, when discussing the unit of heat in this context, it is essential to recognize that the Rankine scale provides an absolute reference point for thermal calculations, where 0 Rankine corresponds to absolute zero.

While Kelvin is the absolute scale for Celsius-based measurements and Fahrenheit is a common temperature scale that is not absolute, their use does not apply within the frame of the Rankine system. Celsius, similarly, is a metric temperature scale and does not function within the absolute context that Rankine provides. Understanding this relationship is crucial for working with thermodynamic calculations and heat transfer in engineering applications where the Rankine system is applicable.