存在热漏的换热过程熵产生最小化  

Entropy Generation Minimization for Heat Transfer Processes With Heat Leakage

作　　者：夏少军[1] 陈林根[1] 戈延林[1] 孙丰瑞[1] 

机构地区：[1]海军工程大学动力工程学院,湖北武汉430033

出　　处：《工程热物理学报》2013年第6期1008-1011,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.10905093);海军工程大学自然科学基金(No.HGDYDJJ10011)

摘　　要：本文建立了存在热漏的换热过程模型,应用最优控制理论导出了过程熵产生最小时热、冷流体温度间最优关系。结果表明,热漏对换热过程熵产生最小时热、冷流体温度有较大影响,热流率一定的传热策略要优于热流体温度一定的传热策略,本文的研究对于换热过程的最优设计与运行有一定的理论指导意义。Model of a heat transfer process with heat leakage is established in this paper,and the optimal temperature relationship between hot- and cold-fluids for the minimum entropy generation is derived by applying optimal control theory.The results show that the heat leakage has significant effect on the optimal hot- and cold-fluid temperature configurations,and the strategy of constant heat flux rate operation is superior to that of constant hot fluid temperature operation and rather close to the optimal strategy.The results obtained in this paper could provide some theoretical guidelines for the optimal design and operation of real heat exchangers.

关 键 词：换热过程 热漏 熵产生最小 最优控制 有限时间热力学 

分 类 号：TK12[动力工程及工程热物理—工程热物理]