##  [Joule–Thomson Effect](/joule-thomson-effect) 

  ##  [Joule–Thomson Effect](https://engineering.quantumdictionary.io/joule-thomson-effect-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

The temperature change experienced by a real gas that undergoes an adiabatic, isenthalpic expansion through a porous plug, valve, or throttle; the sign and magnitude of the change are determined by the gas’s Joule–Thomson coefficient and the initial state relative to its inversion temperature.