不可逆定常态流热机的有限时间热力学最优化

在考虑工质与热源间热阻损失的内可逆热机模型基础上，用一常数项表示热漏损失，用一常系数项表示循环中除热阻和热漏外的其余不可逆性（如摩擦、涡流、非平衡等），建立了一个不可逆定常态能量转换卡诺热机模型，并对其进行有限时间热力学分析，导出循环的最佳功率与效率关系，并得到了最大功率及其相应的效率和最大效率及其相应的功率。由此模型可准确描述各种不可逆性对热机性能的影响。由此得到的热机功率效率特性与实际热机特性相同。

Finite Time Thermodynamic Optimization of an Irreversible Stable Continious Flow Heat Engine

On the basis of endoreversible heat engine model considering the sole irreversibility of heat resistance between working fluid and heat reservoirs,this paper presents an irreversible stable continious flow heat engine model by taking account of the losses of heat leak and the other irreversibilities except heat resistance and heat leak,such as friction,turbulence,nonequlisum effects,and so on,by using a constant parameter and a constant coefficient.The finite time thermodynamic analysis of the model cycle is performed.The relation between optimal power and efficiency,the maximum power and the corresponding efficiency,and the maximum efficiency and the corresponding power are derived.The presented model may actully describe the influences of a variety of irreversibilities on the performance characteristics of heat engine.The power versus efficiency characteristics of the model is the same as real heat engine.