线性唯象传热定律下理想回热斯特林热机有效功率特性  

Effective power characteristics of Stirling heat engine under linear phenomenological heat transfer law and ideal regeneration

作　　者：徐豪然 戈延林 陈林根 丁泽民[4] 冯辉君 XU Hao-ran;GE Yan-lin;CHEN Lin-gen;DING Ze-min;FENG Hui-jun

机构地区：[1]武汉工程大学热科学与动力工程研究所,湖北武汉430205 [2]湖北省绿色化工装备工程技术研究中心,湖北武汉430205 [3]武汉工程大学机电工程学院,湖北武汉430205 [4]海军工程大学动力工程学院,湖北武汉430033

出　　处：《节能》2021年第12期25-29,共5页Energy Conservation

基　　金：国家自然科学基金(项目编号:51779262);武汉工程大学研究生教育创新基金项目(项目编号:CX2020044)。

摘　　要：应用有限时间热力学理论,对工质与热源间传热服从线性唯象传热定律的理想回热斯特林热机进行热力学分析,研究存在热阻、热漏和机械损失时具有理想回热的斯特林热机的有效功率特性,导出有效功率表达式。用数值计算的方法分析热漏、传热系数和高温热源温度对热机有效功率性能的影响。结果表明,热机在最大有效功率点工作时虽然降低了部分轴功率,却可以得到更大的制动热效率,研究结果为斯特林热机的优化提供新的设计方案。Thermodynamics analysis for the ideal regenerative Stirling heat engine when the heat transfer law between the working fluid and the heat reservoir obeys the linear phenomenological heat transfer law is carried out by using finite time thermodynamics theory.The effective power characteristics of the ideal regenerative Stirling heat engine is studied when the thermal resistance,heat leakage and mechanical losses are considered,and the effective power expression is derived.The effects of heat leakage,heat transfer coefficient and temperature of the high-temperature heat source on the performance of the heat engine are analyzed by using numerical calculations.The obtained results show that although part of the shaft power is sacrificed when the heat engine works at the maximum effective power point,the braking thermal efficiency can be greatly improved.The results obtained herein can provide a new design scheme for the optimization of Stirling engines.

关 键 词：有限时间热力学 斯特林热机 传热损失 热漏损失 线性唯象传热定律 有效功率 

分 类 号：O414[理学—理论物理]