| 摘要: |
| 本文对筒型翅片管换热器的空气侧流动特点进行了理论分析，基于现有换热模型提出了一种能够反映筒型翅片管换热器结构特点的集中参数形式的换热因子关联式。通过实验对比了筒型和普通型的换热因子，对理论分析进行验证，结果表明：现有换热模型对筒型翅片管换热器的预测误差较大，平均相对误差达到81.16%；对传统换热器预测较准，平均误差为7.53%；使用本文实验数据拟合后的新关联式对筒型换热器平均相对误差仅为8.86%，对传统换热器平均误差为8.80%，且误差分布均匀，大幅提高了关联式对筒型翅片管换热器的预测精度，也保持了对传统换热器的预测精度。 |
| 关键词: 翅片管换热器 换热因子 实验关联式 变结构分析 |
| DOI： |
| 投稿时间：2020-06-06 修订日期：2020-09-16
|
| 基金项目:国家自然科学基金（51976114）和中国博士后科学基金（2019M650084）资助项目。 |
|
| Analysis and Experiment on the Air-side Heat Transfer Model of Cylindrical Fin-and-tube Heat Exchanger |
| Huang Chu,Gu Bo,Tian Zhen,Sha Yuxiong |
| (Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiao Tong University;Merchant Marine College, Shanghai Maritime University) |
| Abstract: |
| A theoretical analysis on the air-side flow characteristics of cylindrical fin-and-tube heat exchanger was carried out. Based on the existing heat transfer model, a correlation formula of lumped parameters, which can reflect the structural characteristics of the cylindrical fin-and-tube heat exchanger, was proposed. The heat transfer factors of the cylindrical and common types were experimentally studied and the theoretical analysis was verified. The average relative error of the existing heat exchanger model was 81.16% for the cylindrical heat exchanger, while that of the traditional heat exchanger was 7.53%. The average relative error of the new correlation was only 8.86% for the cylindrical heat exchanger and 8.80% for the traditional heat exchanger, and the error distribution was uniform, which indicates that the prediction accuracy of new correlation is significantly improved for the cylindrical heat exchanger and maintained for the traditional heat exchanger. |
| Key words: fin-and-tube heat exchanger heat transfer factor experimental correlation variable structure analysis |
