化工学报2024，Vol.75Issue(z1)：95-107,13.DOI:10.11949/0438-1157.20240262
微型翅片疏水复合强化管管内流动沸腾换热预测模型
Prediction model of flow boiling heat transfer in microfinned hydrophobic composite enhanced tube
摘要
Abstract
The flow boiling heat transfer characteristics of the refrigerant in one smooth tube(ST tube)and three enhanced tubes were compared experimentally.The three enhanced tubes used in the experiment are respectively the heat transfer tube with hydrophobic surface(HYD tube),the heat transfer tube with herringbone microfin(HB tube)and the heat transfer tube with the composite structure of herringbone microfin and hydrophobic surface(HB/HYD tube).The experiments were carried out at saturation temperatures of 279,283 and 288 K,mass flux ranging from 50 kg/(m2·s)to 150 kg/(m2·s),and inlet and outlet vapor quality maintained at 0.2 and 0.8,respectively.It can be seen from the analysis of the results that the average heat transfer coefficient of HB tube and HYD tube is about 1.37 and 1.42 times that of smooth tube,respectively,the HB/HYD tubes with composite surface structure have the highest heat transfer coefficient,about 1.45-1.63 times that of smooth tube.According to the measured heat transfer coefficient,six empirical prediction correlation models are selected and verified by smooth tube,which proves the reliability of the selected correlation models.Combined with the structural characteristics of the enhanced tubes,a new correlation model is developed,which can predict the heat transfer coefficient of the studied enhanced tubes well.About 90％of the data points of the three enhanced tubes are within the error range of±10％,this optimizes the scheme of industrial design of heat exchanger,thereby improving the efficiency and reliability of heat exchanger.关键词
相变/气液两相流/流动沸腾/换热/预测模型Key words
phase change/gas-liquid flow/flow boiling/heat transfer/prediction model分类
能源科技引用本文复制引用
杜得辉,冯威,张江辉,项燕龙,乔高攀,李蔚..微型翅片疏水复合强化管管内流动沸腾换热预测模型[J].化工学报,2024,75(z1):95-107,13.基金项目
国家自然科学基金项目(52320105001,52076187) （52320105001,52076187）
