先进微翅凹坑复合强化表面管外流动沸腾换热预测模型

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文章编号： 1672-6987（2023）06-0086-09； DOI： 10.16351/j.1672-6987.2023.06.011

石绮云1， 王嘉程1， 张江辉1， 刘丽1， 项燕龙2， 何燕1， 马连湘1， 李蔚1,3*(1. 青岛科技大学 机电工程学院， 山东 青岛 266061； 2. 宁波金田管业有限公司， 浙江 宁波315000；

3. 浙江大学 能源工程学院， 浙江 杭州 310027)

摘要： 采用实验方法对比制冷剂在3根强化管和1根光滑管外环形侧的流动沸腾换热和压降特性。实验采用的3根强化换热管分别是具有螺旋微翅片的换热管（HB管）、具有凹坑结构的换热管（DIM管）和同时具有螺旋微翅片和凹坑复合结构的换热管（DIM/HB管）。实验的饱和温度为6 ℃，质量流速范围是75~225 kg·(m2·s)-1，进出口干度分别保持在02和08。从流动沸腾换热实验结果可以看出，具有复合结构的DIM/HB管展示出最高的换热系数，约为光滑管的154~223倍。但同时DIM/HB管也展示出相对较高的摩擦压降，约为光滑管的126倍。基于文献中2种经典的蒸发换热预测关联式分别对预测模型进行修正，通过比较发现，基于Thome关联式的修正预测模型拟合效果更好，误差可达10%以内。

关键词： 流动沸腾； 复合结构； 强化传热； 换热管； 预测模型

中图分类号： TK 124文献标志码： A

引用格式： 石绮云， 王嘉程， 张江辉， 等. 先进微翅凹坑复合强化表面管外流动沸腾换热预测模型［J］. 青岛科技大学学报(自然科学版), 2023, 44(6): 86-94.

SHI Qiyun, WANG Jiacheng, ZHANG Jianghui, et al. Advanced prediction model study on heat transfer characteristics of flow boiling outside enhanced heat transfer tube with both micro-fins and dimples［J］. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2023， 44（6）： 86-94.

Advanced Prediction Model Study on Heat Transfer Characteristics of Flow Boiling

Outside Enhanced Heat Transfer Tube with Both Micro-fins and Dimples

SHI Qiyun1, WANG Jiacheng1, ZHANG Jianghui1, LIU Li1,

XIANG Yanlong2, HE Yan1, MA Lianxiang1, LI Wei1,3

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

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

3. Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract: The flow boiling heat transfer and pressure drop characteristics of R410a on the annular outside of three enhanced tubes and one smooth tube were compared experimentally. The three enhanced heat exchanger tubes involved in the experiment are the Tube HB with spiral microfin, the Tube DIM with dimples and the Tube DIM/HB with both spiral micro-fins and dimples. The saturation temperature of the experiment is 6 ℃, the range of mass flow rate is 75-225 kg·（m2·s）-1, and the vapor qualities of inlet and outlet are 02 and 08 respectively. According to the results, it can be seen that the Tube DIM/HB performed the highest heat transfer coefficient, while a relatively high friction pressure drop was observed as well. The heat transfer coefficient of Tube DIM/HB was about 154-223 times that of smooth tube, and the friction pressure drop was 26% higher than that of the smooth tube. Based on the two classical evaporation heat transfer prediction correlations in the literature, the prediction model was modified respectively. Through comparison, it was found that the fitting effect of the modified prediction model based on Thome correlation was better, and the error was less than 10%.

Key words: flow boiling； composite structure； enhanced heat transfer； heat transfer tube； prediction model.

收稿日期： 2022-11-06

基金项目： 国家自然科学基金项目(52076187).

作者简介： 石绮云(1998-)，女，硕士研究生. *通信联系人.