广义不可逆热布朗热机的生态学优化  

Ecological Performance Optimization of a Generalized Irreversible Thermal Brownian Heat Engine

作　　者：齐丛正 陈林根 戈延林 冯辉君 QI Congzheng;CHEN Lingen;GE Yanlin;FENG Huijun(Institute of Thermal Science and Power Engineering,Wuhan Institute of Technology,Wuhan 430205,China;Hubei Provincial Engineering Technology Research Center of Green Chemical Equipment,Wuhan 430205,China;School of Mechanical&Electrical Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学热科学与动力工程研究所,武汉430205 [2]湖北省绿色化工装备工程技术研究中心,武汉430205 [3]武汉工程大学机电工程学院,武汉430205

出　　处：《工程热物理学报》2022年第10期2559-2564,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52171317,No.51779262)。

摘　　要：基于有限时间热力学理论,本文研究了不可逆热布朗热机的生态学性能。导出了系统生态学函数的表达式,分析和对比了热机分别在功率、效率和生态学函数目标下的性能特性。给出了热机的最优工作区域,并阐述了生态学函数作为目标时的重要意义。分别存在最优的势垒高度、热导率分配比和外力对应于热机的最大功率、最大效率和最大生态学函数。生态学函数对布朗热机具有较好的协调优化效果,当用生态学函数代替功率(或效率)作为目标时,输出功率(或效率)降低较小,而效率(或功率)提升较大。Based on finite-time thermodynamics, the ecological performance of a generalized irreversible thermal Brownian heat engine is studied. Expression of ecological function is derived, and the system performance characteristics under power, efficiency and ecological function objectives are analyzed and compared. The optimal working areas are given, and the significance of ecological function as the design objective is expounded. There exists a set of optimum barrier height, thermal conductance ratio and external load corresponding to the maximum power, maximum efficiency and maximum ecological function of heat engine, respectively. The ecological function has a good optimization effect on thermal Brownian heat engine. When the power(or efficiency) objective is replaced by ecological function, the efficiency(or power) will increase greatly while the output power(or efficiency) drops smaller.

关 键 词：有限时间热力学 不可逆热布朗热机 生态学函数 性能比较 

分 类 号：TK123[动力工程及工程热物理—工程热物理]