Abstract
Abstract Utilizing the Meissner-Ochsenfeld effect of high- T c superconductors we developed a novel heat engine. The rotor carriers 20 Y-Ba-Cu-O pellets at the rim. They pass the air gap of a permanent-magnet system in an open Dewar vessel filled with liquid nitrogen. When in motion, the pellets, one after the other, turn superconducting and experience a driving force due to the Meissner-Ochsenfeld effect in the divergent magnetic field at the end of the air gap. The efficiency of this heat engine working between the temperatures T l T c and T h > T c is calculated by means of the H , T -diagram. In a model analysis we treat the case of a type-I superconductor (lead). Maximum efficiency is obtained with T h = T c and T l =0.
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