Energetics of a simple microscopic heat engine

Details Energetics of a simple microscopic heat engine Energetics of a simple microscopic heat engine

Nov 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006smpr.confe..26b&link_type=abstract

Proceedings of the International conference on Statistical Mechanics of Plasticity and Related Instabilities. August 29-Septembe

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

We model a microscopic heat engine as a particle hopping on a one-dimensional lattice in a peri- odic sawtooth potential, with or without load, assisted by the thermal kicks it gets from alternately placed hot and cold thermal baths. We find analytic expressions for current and rate of heat flow when the engine operates at steady state. Three regions are identified where the model acts either as a heat engine or as a refrigerator or as neither of the two. At quasistatic limit both efficiency of the engine and coefficient of performance of the refrigerator go to that for Carnot engine and Carnot refrigerator, respectively. We investigate efficiency of the engine at two operating condi- tions (at maximum power and at optimum value with respect to energy and time) and compare them with those of the endoreversible and Carnot engines.

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