Piston movement in thermocompressor

Analysis and thermodynamic modelling of a thermocompressor are presented. A thermocompressor is a compressor that transforms the heat of a source into an energy of pressure without intermediate mechanical work. It is a Stirling engine simplification into a driven machine for which the piston that provides the power has been suppressed. This thermocompressor comprises a free piston displacer that separates cold and hot gas. The model takes into account the movement of the piston, heat transfer and variable mass with time.