Study On Performance Optimization Of Quantum Brayton Circulating Heat Engine

Motivated by recent development of quantum information processing quantum heat engine became a new research area.In this thesis, the quantum Brayton cycle with the Dirac particle in one-dimensional infinite potential well as workings substance is studied, this thesis is consists of three parts, the first two chapters are the first part.In the first chapter of this thesis, after a brief introduction about the quantum mechanics and thermodynamics, a comparison between the quantum heat engine and classical heat engine is given and the relations are discussed.In the second chapter, the basic concept and theory of the quantum thermodynamics is introduced, including quantum version of the first law of thermodynamics, and the isobaric process, the isochoric process, the adiabatic process and the isothermal process. The third chapter is the second part, the classical Brayton cycle or heat engine and the quantum Brayton cycle are presented and compared. The relations between the two kinds of cycles are discussed.The fourth chapter is the main part of this thesis. In this chapter, the quantum Brayton engine is introduced and studied where the Dirac particle in one-dimensional infinite potential well is considered as the working substance. Through the study of quantum thermodynamics cycle, some important performance parameters of the quantum Brayton engine can be derived. The internal energy, power output, efficiency, the optimal working areas,are obtained by virtue of analytical derivations and numerical simulations.