不可逆谐振子系统布雷顿热机循环性能优化  

Optimization on the Performance of an Irreversible Harmonic Brayton Heat Engine

作　　者：王建辉[1] 何济洲[1] 何旋[1] 

机构地区：[1]南昌大学理学院,江西南昌330047

出　　处：《南昌大学学报（工科版）》2006年第1期23-27,共5页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(10465003);江西省自然科学基金资助项目(0412011)

摘　　要：建立了一种不可逆谐振子系统布雷顿热机循环模型.基于量子主方程和半群方法,分析了不可逆谐振子系统布雷顿热机循环的时间演化公式.推导出循环在两等频率过程的时间、输出功、效率和功率的一般表达式,并获得了效率和功率与低等频率过程时间之间的关系曲线.通过数值解,对谐振子系统布雷顿热机循环的性能参数进行了优化分析.A cycle model of an irreversible Brayton heat engine working with harmonic systems is established in this paper. Based on quantum master question and semi - group approach, the time evolution of the cycle is analyzed. General expressions of the times spent on two constant - frequency processes, work, thermal efficiency and power output are derived. Moreover, explicit curves between thermal efficiency and power output with the time of low constant - frequency processes are generated. By means of numerical analysis,the parameters of the performance of the heat engine cycle are optimized.

关 键 词：谐振子系统 布雷顿热机 内不可逆性 输出功率 

分 类 号：O414.2[理学—理论物理] O590[理学—物理]