化工学报 ›› 2019, Vol. 70 ›› Issue (1): 56-64.DOI: 10.11949/j.issn.0438-1157.20180487

• 流体力学与传递现象 • 上一篇    下一篇

CO2管内流动沸腾换热模型评价研究

刘忠彦1(),孙大汉1,金旭1(),王天皓1,马一太2   

  1. 1. 东北电力大学能源与动力工程学院,吉林省 吉林市 132000
    2. 天津大学机械工程学院,天津 300072
  • 收稿日期:2018-05-09 修回日期:2018-09-08 出版日期:2019-01-05 发布日期:2019-01-05
  • 通讯作者: 金旭
  • 作者简介:刘忠彦(1985—),男,博士,讲师,<email>llzzyy198584@126.com</email>|金旭(1976—),男,博士,副教授,,<email>jinxu7708@sina.com</email>
  • 基金资助:
    吉林市科技发展创新项目(201750214);东北电力大学博士启动基金项目(BSJXM-201507);吉林省重点科技研发项目(20180201006SF)

Evaluation research on boiling heat transfer model of CO2 in tube

Zhongyan LIU1(),Dahan SUN1,Xu JIN1(),Tianhao WANG1,Yitai MA2   

  1. 1. School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132000, Jilin, China
    2. School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
  • Received:2018-05-09 Revised:2018-09-08 Online:2019-01-05 Published:2019-01-05
  • Contact: Xu JIN

摘要:

CO2由于良好的环境特性和优良的热力学特性,被认为是一种理想的替代制冷剂。与传统制冷剂相比,CO2有着十分不同的流动沸腾换热特性。然而现有的换热关联式都是基于各自的实验数据拟合得出,由于数据点太少和变量参数范围受限导致关联式的预测结果大相径庭。所以建立更加全面的CO2管内流动沸腾换热数据库对不同换热模型进行对比分析,对于深入了解CO2管内流动沸腾换热特性和研究更加准确的换热关联式具有重要意义。通过从24篇文献中搜集的4040个实验数据点对6个CO2的管内流动沸腾换热模型进行对比分析,发现Fang(2013)关联式误差最低为10.6%,并绘制了气液相Reynolds数随管径的变化,气液相Reynolds数的变化的散点图以及Nusselt数随Bond数变化的趋势图,可为深入了解CO2管内流动沸腾换热特性和将来研究更加准确的新型换热关联式提供参考。

关键词: 二氧化碳, 流动沸腾, 干涸, 传热系数

Abstract:

Due to good environmental characteristics and excellent thermodynamic properties, CO2 is considered as an ideal alternative refrigerant. Compared with the traditional refrigerant, CO2 flow boiling heat transfer characteristics is very different. However, the existing heat transfer correlations are based on their respective test data fitting, because the data points are too less and the range of variable parameters is limited, the predicted results are very different. To establish the CO2 tube flow boiling heat transfer in a more comprehensive database, compare and analyze different heat transfer models, it is of great significance for deep understanding of the boiling heat transfer characteristics of CO2 in tube and study more accurate heat transfer correlation. There are six correlations analyzed by using 4040 experimental data points of CO2 flow boiling heat transfer from 24 references, the study found that for Fang (2013) correlation minimum error is 10.6%, and draw the variation of gas and liquid Reynolds number with pipe diameter, and the change of gas and liquid Reynolds number scatter plot and the plot of Nusselt number change with Bond number, it can provide insight into the CO2 tube flow boiling heat transfer characteristics and the future research a new type of heat transfer correlations for more accurate to provide the reference.

Key words: carbon dioxide, flow boiling, dry, heat transfer coefficient

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