R134a管内沸腾传热关系式的评价分析  

Evaluation of Correlations of Flow Boiling Heat Transfer of R134a in Channels

作　　者：方贤德[1] 周展如[1] 施蓉蓉[1] 田莉莉[1] 许玉[1] 

机构地区：[1]南京航空航天大学航空宇航学院人机与环境工程系,江苏南京210016

出　　处：《工程热物理学报》2013年第12期2299-2304,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51176074);江苏省普通高校研究生科研创新计划资助项目(No.CXZZ12-0172);南京航空航天大学博士学位论文创新与创优基金(No.BCXJ12-01);中央高校基本科研业务费专项资金资助;江苏高校优势学科建设工程资助项目

摘　　要：R134a管内流动沸腾传热计算有广泛的应用需求.关于管内流动沸腾传热关系式对于R134a的适应性,已有的评价分析涉及的关系式数量和实验数据很局限,造成了评价结果的很大差别和相互矛盾,使用者很难判断哪些关系式比较合适.本文从19篇论文中收集了2286组R134a沸腾传热实验数据,包括细微通道和常规尺寸通道.用这些数据对20个管内流动沸腾传热关系式进行了评价,结果表明,最好公式的平均绝对误差为34.9%,不能适应工程需要.对影响公式准确度的因素进行了分析,获得了有使用价值的结论,为R134a流动沸腾传热关系式的进一步研究提供了参考.The calculation of two-phase flow boiling heat transfer of R134a in channels is required in a variety of research and engineering fields. A number of correlations for flow boiling hear transfer in channels have been proposed, and their applicability to R134a remains a research interest. Most of evaluations of the applicability of existing correlations to R134a used limited experimental data and/or limited correlations. Therefore, the results were often not consistent, even controversial. It is difficult to judge which correlations were more appropriate for R134a. In this paper, 2286 data points of flow boiling heat transfer of R-134a in channels are collected from 19 published papers, with the channel diameters ranging from micro-/mini- channels to convectional channels. With the data, 20 two-phase flow boiling heat transfer correlations are reviewed and compared, which yields some useful results and provides valuable information for further research in the correlation of flow boiling heat transfer of R134a in channels. The most accurate correlation has a mean absolute deviation of 34.9%, suggesting a need to develop a better correlation.

关 键 词：两相流 R134A 流动沸腾 传热 关系式 

分 类 号：TK121[动力工程及工程热物理—工程热物理]