三热源热布朗制冷机的生态学最优性能  

Optimal Ecological Performance of Three-Heat-Reservoir Thermal Brownian Refrigerator

作　　者：齐丛正 陈林根 戈延林 QI Congzheng;CHEN Lingen;GE Yanlin(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》2023年第10期2633-2638,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);武汉工程大学研究生教育创新基金项目(No.CX2022068)。

摘　　要：本文将基于?分析的生态学函数引入到建立的三热源热布朗制冷机性能优化中,导出了反映?输出率和熵产率间最佳折衷的生态学函数。应用有限时间热力学理论,分析了牛顿传热规律下制冷机的生态学最优性能。通过与制冷率目标下的性能特性进行比较,说明了生态学函数目标的意义。结果表明:外部传热只影响性能参数的大小,不影响其优化关系。制冷率和生态学函数分别关于热导率分配比、外力和势垒高度存在极大值。当以生态学函数代替制冷率作为目标时,制冷率减小较少,而对应的制冷系数(COP)得到了巨大的提升。In this paper,exergy-based ecological function is introduced to performance optimization of established three-heat-reservoir thermal Brownian refrigerator.An ecological function for the best compromise between exergy output rate and entropy generation rate is derived.The optimal ecological performance of three-heat-reservoir thermal Brownian refrigerator with Newtonian heat transfer law is analyzed by applying finite-time thermodynamics.The significance of ecological objective is illustrated by comparing with the performance under cooling load objective.Results show that external heat transfer only affects the magnitude of performance parameters,and does not affect their optimization relations.The cooling load and ecological function have maximum values with respect to the external load,thermal conductance allocation ratios and barrier height,respectively.When the cooling load criterion is replaced by ecological function,the cooling load drops less,but the corresponding COP is improved greatly.

关 键 词：三热源热布朗制冷机 生态学函数 制冷率 COP 性能优化 有限时间热力学 

分 类 号：TK123[动力工程及工程热物理—工程热物理]