future events

Geometric Heat Engines Without Power-Efficiency Tradeoff

TYPETheor./Math. Physics Seminar
Speaker:Dr. Oren Raz
Affiliation:University of Maryland
Organizer:Yoav Sagi
Time:14:30 - 15:30
Location:Lidow Nathan Rosen (300)
Abstract:Thermodynamics places a limit on the efficiency of heat engines, but not on their output power or on how the power and efficiency change with the engine’s cycle time. In the talk I will present a geometrical description of the power and efficiency as a function of the cycle time, applicable to a broad class of heat engine models. This geometrical description is used to design engine protocols that attain both the maximal power and maximal efficiency at the fast driving limit. Furthermore, using this method, we also prove that no protocol can exactly attain the Carnot efficiency at nonzero power.