Do stirling engines have a pressure gradient across the regenerator?

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SUMMARY

The discussion focuses on the presence of a pressure gradient across the regenerator in Stirling engines. It establishes that while there is a temperature difference during the transition of the working fluid, the process is isometric. The conversation suggests that a pressure difference is necessary to drive the flow of gas from the hot chamber to the cold chamber, particularly if there is flow through the regenerator. The configuration of the engine plays a crucial role in determining these dynamics.

PREREQUISITES
  • Understanding of Stirling engine thermodynamics
  • Knowledge of isometric processes in gas dynamics
  • Familiarity with the concept of regenerators in heat engines
  • Basic principles of pressure and temperature relationships in gases
NEXT STEPS
  • Research the thermodynamic cycles of Stirling engines
  • Explore the role of regenerators in heat recovery systems
  • Learn about pressure differences in gas flow dynamics
  • Investigate various Stirling engine configurations and their impact on performance
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Engineers, thermodynamics students, and hobbyists interested in Stirling engine design and optimization will benefit from this discussion.

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There is a temperature difference and we know the transition of the working fluid (from the hot chamber to the cold one) is isometric. So either there must be a pressure difference, or the number of molecules must be smaller; however, this can't be the case since eventually all the gas must move over to the other side. So is there a pressure difference? Or is it both constant volume and constant pressure process?
 
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What does your Stirling engine look like?

In general, if there is flow through your regenerator (which I suspect there is but cannot confirm without knowing how the engine is configured) there is a pressure difference driving the flow from the pistons in the Stirling engine.
 

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