An Optimized Quantum Harmonic Otto Heat Engine At High Temperature

Abstract

Quantum harmonic Otto heat engine cycles of a time-dependent harmonic oscillator operating under the conditions of objective (Ω) function in which the maximum efficiency is set to be ηC and the minimum efficiency(the efficiency at maximum power) is set to be half of ηC for sudden switch process at high temperature;it is effectively optimized .The power and objective function of the heat engine are derived analytically as functions of Compression ratio.Apply the optimization methods suggested by A.C Her nandez et:al, the heat engine is effectively optimized and for sudden switch at high temperature regime working under optimized condition is better than working at maximum power.In the high temperature limit for sudden switch process, the figure of merit for this model greater than one in this the working optimized power greater than the working at maximum power.In the range of 0 < τ < 0.38, its figure of merit is less than one under the condition working at optimized power is less than working at maximum power for model quantum harmonic Otto heat engine for sudden switch process at high temperature .