A Torsion Heat Engine: Cycle Work Between Two Spin-Density States of a Polarised Working Body

This paper presents a complete design study of a torsion heat engine whose working body changes spin state on its return stroke, computed throughout from stated assumptions. At a hot reservoir of 500 K against a cold reservoir of 300 K, the cycle delivers 552.0 J of work per cycle at an efficiency of 46.00 percent, against a plain Carnot efficiency of 40.00 percent at the same temperatures; the spin term contributes 72.0 J of the work. Efficiency rises from 20.29 percent at a hot temperature of 350 K to 68.5 percent at 800 K. Every figure is a computed result of the stated model and nothing was built or tested: the study is SIMULATED, NOT MEASURED, and its limits are stated as plainly as its performance.