CENTER FOR APPLIED MATHEMATICS AND THEORETICAL PHYSICS

UNIVERZA V MARIBORU UNIVERSITY OF MARIBOR

KREKOVA 2 SI-2000 MARIBOR SLOVENIA

Phone +(386) (2) 2355 350 and 2355 351 Fax +(386) (2) 2355 360

Robnik@uni-mb.si www.camtp.uni-mb.si

PROF.DR. MARKO ROBNIK, DIRECTOR

**Abstract**:
A simple abstract model of a classical heat engine with variable efficiency is presented, which promises to give some general guidelines for future heat engine designs. It is composed of a hotter and colder thermochemical baths connected via two conductors that are modelled as classical deterministic scatterers (e.g. Poincaré maps). The general features and especially the efficiency of the heat engine are studied as function of the dynamical properties of the conductors. In specific simple cases of one- and two-dimensional wires analytic results were obtained showing that in a certain limit the near to Carnot efficiency is reachable at the price of a low-power output. The latter can be improved by increasing the temperature gradient between baths.

**Seminarsko predavanje (v angleškem jeziku)
bo v četrtek 5. marca 2009 ob 15:15 uri
v seminarski sobi CAMTP na Krekovi 2, pritličje desno.
Vljudno vabljeni vsi zainteresirani, tudi študentje.**

Prof.Dr. Marko Robnik

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Janez Kaiser 2009-02-18