Optimization criteria for an irreversible quantum Brayton engine with an ideal Bose gas

The purpose of this paper is to study the optimal performance for an irreversible quantum Brayton engine consisting of two constant-frequency branches connected by two irreversible adiabatic branches. The solution of the generalized quantum master equation of a thermal system is obtained in the Heisenberg picture. The optimization region (or criteria) for an irreversible quantum Brayton engine is obtained. The relationship between the dimensionless power output P-* versus efficiency eta for the irreversible quantum Brayton engine with heat leakage and other irreversible losses are derived. (c) 2006 American Institute of Physics.