水平涟漪纹管及光管管内冷凝换热机理实验研究

全文下载： 202301014.pdf

 

文章编号： 1672-6987（2023）01-0102-09； DOI： 10.16351/j.1672-6987.2023.01.014

 

王嘉程1， 孙志传2,3， 石绮云1， 项燕龙4， 李蔚1,5， 何燕1*(1.青岛科技大学 机电工程学院，山东 青岛 266061； 2. 中航南京机电液压工程研究中心，江苏 南京211106;

3. 航空机电系统综合航空科技重点实验室，江苏 南京211106;

4.宁波金田管业有限公司，浙江 宁波315000； 5.浙江大学 能源工程学院，浙江 杭州 310027)

 

摘要： 实验研究了制冷剂R410A在两种管径(952 mm和127 mm)的光管和涟漪纹管(1EHT管)管内冷凝换热特性，并根据部分工况下的流型对管内冷凝的换热机理进行了分析。实验中控制冷凝饱和温度为45 ℃，制冷剂流速范围为100~450 kg·(m2·s)-1，干度控制在01~09之间。通过光管实验结果与预测关联式预测的对比表明，使用的单相和冷凝关联式都可以在较小的误差范围内预测实验数据，Hajal流型图可以准确的预测光管的流态，证实了实验设施的可靠性。实验结果表明：随着实验中制冷剂质量流速和干度的增加，光管和涟漪纹管的换热系数都随之增加且涟漪纹管的换热系数是光管的115~205倍。较小的管径可以通过影响制冷剂的流动状态进而提升换热系数来提高传热效率。

 

关键词： 冷凝； 换热系数； 流型； 管径

 

中图分类号： TK 124文献标志码： A

引用格式： 王嘉程， 孙志传， 石绮云， 等. 水平涟漪纹管及光管管内冷凝换热机理实验研究［J］. 青岛科技大学学报(自然科学版), 2023, 44(1): 102-110.

 

WANG Jiacheng, SUN Zhichuan, SHI Qiyun, et al. Experimental study on condensation heat transfer mechanism in horizontal 1EHT tube and smooth tube［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2023， 44（1）： 102-110.

 

Experimental Study on Condensation Heat Transfer Mechanism

in Horizontal 1EHT Tube and Smooth Tube

 

WANG Jiacheng1, SUN Zhichuan2,3, SHI Qiyun1, XIANG Yanlong4, LI Wei1,5, HE Yan1

(1. College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China;

2. AVIC Nanjing Engineering Institute of Aircraft Systems, Nanjing 211106, China;

3. Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Nanjing 211106, China;

4. Ningbo Jintian Copper Tube Co., Ltd., Ningbo 315000, China;

5. School of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

 

Abstract: Condensation heat transfer characteristics of refrigerant R410A in smooth tubes and 1EHT tubes with two diameters (952 mm and 127 mm) were experimentally studied, and the heat transfer mechanism of condensation in tubes was analyzed according to the flow patterns. The experiment was carried out with the saturation temperature was controlled at 45 ℃, the refrigerant flow rate ranged from 100 kg·（m2·s）-1 to 450 kg·（m2·s）-1, and the vapor quality of the experimental section was controlled between 01 and 09. The comparison between the experimental results of the smooth tube and the predicted values of prediction single-phase and condensation correlations shows that the correlations can predict the experimental data within a minor error band, and the Hajal flow pattern map can accurately predict the flow pattern of the smooth tube, which proves the reliability of the experimental facilities. The experimental results show that with the increase of refrigerant mass flow rate and vapor quality, the heat transfer coefficients of the smooth tube and 1EHT tube increase, and the heat transfer coefficient of the 1EHT tube is 115—205 times that of the smooth tube. Smaller tube diameter can also improve the heat transfer efficiency by changing the flow pattern and improving the heat transfer coefficient.

 

Key words: condensation; heat transfer coefficient; flow pattern; tube diameter

 

收稿日期： 2022-01-07

基金项目： 国家自然科学基金项目(52076187).

作者简介： 王嘉程(1997—)，男，硕士研究生.*通信联系人.