化工学报2017，Vol.68Issue(6)：2275-2279,5.DOI:10.11949/j.issn.0438-1157.20161218
填充泡沫铜圆管内R32单相流动换热
Single-phase heat transfer characteristics of R32 flowing through metallic foam
filled channel
朴勇日 1吴晓敏 2马强 1李通1
作者信息
- 1. 清华大学热能工程系,热科学与动力工程教育部重点实验室,北京市CO2资源利用与减排技术重点实验室,北京 100084
- 2. 朝鲜金策工业综合大学,朝鲜平壤 999093
- 折叠
摘要
Abstract
By electric heating method of metal foam, temperature distribution of R32 and porous fibre were measured and the heat transfer coefficients between them were obtained in metallic foam filled channels. The experiments were conducted for R32 in a metallic foam filled tube with an internal diameter of 5 mm, the 0.95 porosity and 15, 45 PPI pore densities, under the conditions of fluid temperature of 280—325 K, heat flux ranging of 1—18 kW·m-2, and mass flux ranging of 20—200 kg·m-2·s-1. Following conclusions could be summarized from the results of the experiments. The heat transfer coefficients of R32 flowing through porous fibres increased with the increase ofRe and pore densities. The deviation between predicted values of heat transfer coefficient based on conventional correlation and experimental data reached to-35%—-67%, that is, the conventional correlation is not suitable to predict the convective heat transfer between the porous fibre and the fluid.关键词
泡沫金属/R32/传热系数Key words
metal foam/R32/heat transfer coefficient分类
能源科技引用本文复制引用
朴勇日,吴晓敏,马强,李通..填充泡沫铜圆管内R32单相流动换热[J].化工学报,2017,68(6):2275-2279,5.
