填充泡沫铜圆管内R32单相流动换热

doi:10.11949/j.issn.0438-1157.20161218

化工学报 ›› 2017, Vol. 68 ›› Issue (6): 2275-2279.DOI: 10.11949/j.issn.0438-1157.20161218

填充泡沫铜圆管内R32单相流动换热

朴勇日^1,2, 吴晓敏¹, 马强¹, 李通¹

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

收稿日期:2016-09-01 修回日期:2017-03-05 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: 吴晓敏

Single-phase heat transfer characteristics of R32 flowing through metallic foam filled channel

PAK Yongil^1,2, WU Xiaomin¹, MA Qiang¹, LI Tong¹

1. Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Key Laboratory of CO₂ Utilization and Reduction Technology, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;
2. KimChaek University of Technology, Pyongyang 999093, DPRK

Received:2016-09-01 Revised:2017-03-05 Online:2017-06-05 Published:2017-06-05
Contact: 10.11949/j.issn.0438-1157.20161218

摘要/Abstract

摘要：

在泡沫金属纤维两端布置电极，采用电加热方法，实验测量了填充泡沫金属的管内R32流体和泡沫金属纤维的温度分布，得到了泡沫纤维与流体之间的对流传热系数。实验条件为：实验段管径5 mm，泡沫铜孔隙率0.95，孔隙密度15、45 PPI，流体温度280~325 K，热通量1~18 kW·m^-2，质量流速20~200 kg·m^-2·s^-1。实验及模拟结果表明：泡沫纤维与单相R32的对流传热系数随Re、泡沫铜的孔隙密度的增大而增大。基于流体外掠光滑圆管换热实验数据的Zukauskas经验关联式的预测值与泡沫金属纤维和R32流体之间的对流传热系数的实测值偏差为-35%~-67%，即该关联式不适用于泡沫金属纤维与流体之间的对流传热系数的预测。

关键词: 泡沫金属, R32, 传热系数

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 of Re 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.

Key words: metal foam, R32, heat transfer coefficient

中图分类号:

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.

PAK Yongil, WU Xiaomin, MA Qiang, LI Tong. Single-phase heat transfer characteristics of R32 flowing through metallic foam filled channel[J]. CIESC Journal, 2017, 68(6): 2275-2279.

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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

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