Thermodynamics
The classical Carnot heat engine
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The pseudo Stirling cycle, also known as the adiabatic Stirling cycle, is a thermodynamic cycle with an adiabatic working volume and isothermal heater and cooler, in contrast to the ideal Stirling cycle with an isothermal working space.^[1] The working fluid has no bearing on the maximum thermal efficiencies of the pseudo Stirling cycle.^[2]

Practical Stirling engines usually use a adiabatic Stirling cycle as the ideal Stirling cycle can not be practically implemented. Nomenclature (practical engines and ideal cycle are both named Stirling)^[3] and lack in specificity (omitting ideal or adiabatic Stirling cycle) can cause confusion.

The pseudo Stirling cycle was designed to address predictive shortcomings^[2] in the ideal isothermal Stirling cycle. Specifically, the ideal cycle does not give usable figures or criteria for judging the performance of real-world Stirling engines.

• Stirling engine
• Stirling cycle

• Abstract of "The Pseudo Stirling cycle - A suitable performance criterion"
• Brief History of Stirling Machines p. 4 and on

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