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<t>My old text makes no mention of scrolls, none in the entire text. It shows a heated expander and a cooled compressor connected by flows through the regenerator, and briefly explains the Stirling cycle (with p-v and T-s diagrams). It seems that regular pistons were assumed instead of scrolls.<br/>...

<t>My old text makes no mention of scrolls, none in the entire text. It shows a heated expander and a cooled compressor connected by flows through the regenerator, and briefly explains the Stirling cycle (with p-v and T-s diagrams). It seems that regular pistons were assumed instead of scrolls.<br/>...

<t>Looking at an old thermodynamics text with a schematic for a Stirling power cycle, it looks like a heated scroll expander piped to and from a cooled scroll compressor might work. Why not use air as the working gas? Of course the in-between pipes will need to make a heat exchanger for regeneration...

<t>Looking at an old thermodynamics text with a schematic for a Stirling power cycle, it looks like a heated scroll expander piped to and from a cooled scroll compressor might work. Why not use air as the working gas? Of course the in-between pipes will need to make a heat exchanger for regeneration...