# Alternative thermodynamic cycle for the Stirling machine

## TL;DR

This paper introduces a new thermodynamic cycle for Stirling engines emphasizing polytropic processes, providing analytical models that better match experimental data and adaptable to various engine types.

## Contribution

It presents an innovative thermodynamic cycle with analytical expressions that improve modeling accuracy and versatility for Stirling engines.

## Key findings

- Enhanced agreement with experimental pressure-volume diagrams
- Analytical expressions for pressure and temperature as functions of volume
- Applicable to different Stirling engine configurations

## Abstract

We develop an alternative thermodynamic cycle for the Stirling machine, where the polytropic process plays a central role. Analytical expressions for pressure and temperatures of the working gas are obtained as a function of the volume and the parameter which characterizes the polytropic process. This approach achieves a closer agreement with the experimental pressure-volume diagram and can be adapted to any type of the Stirling engine.