|
|||||
|
|
| 换热器的效能与熵产分析 | |
| 引用本文： | 熊大曦,李志信,过增元. 换热器的效能与熵产分析[J]. 工程热物理学报, 1997, 0(1) |
| 作者姓名： | 熊大曦 李志信 过增元 |
| 作者单位： | 清华大学工程力学系!北京，100084，清华大学工程力学系!北京，100084，清华大学工程力学系!北京，100084 |
| 摘 要： | 本文给出了以进口冷热流体温度、热容量流比和传热单元数表示的顺流、逆流及两边混合的叉流换热器熵产数的分析表达式，研究了这三类换热器熵产数随热容量流比及传热单元数变化的规律，给出了由于不平衡流动和传热面积有限产生的熵产数的表达式。分析表明，在进、出口温度均匀条件下换热器效能与熵产数之间存在一一对应的关系，效能与熵产数一样，所表征的是换热器热力学第二定律的完善程度。 |
| 关 键 词： | 熵产数 效能 换热器 |
ANALYSIS ON EFFECTIVENESS AND ENTROPY GENERATION IN HEAT EXCHANGERS |
|
| XIONG Dial, LI Ziixin, GUO Zengyuan. ANALYSIS ON EFFECTIVENESS AND ENTROPY GENERATION IN HEAT EXCHANGERS[J]. Journal of Engineering Thermophysics, 1997, 0(1) | |
| Authors: | XIONG Dial LI Ziixin GUO Zengyuan |
| Abstract: | In this paper, the entropy generation of several kinds of heat exchangers was studied.The analytical expressions of the number of entropy generation of parallelflow, counterflow and two-side-mixed crossflow heat exchangers were presented with inlet temperature, heat capacity rate ratio and the number of heat transfer unit. The results show that there is a oneto-one corresponding relation between effectiveness and the number of entropy generation if the inlet parameters are thed. |
| Keywords: | effectiveness number of entropy generation heat exchanger |
| 本文献已被 CNKI 等数据库收录！ | |