螺旋类通道中传热膜系数的通用算法  

A generalized calculation method for heat transfercoefficients of spiral channels

作　　者：程惠亭 郝文斌 CHENG Hui-ting;HAO Wen-bin(Hualu Engineering and Technology Co.,Ltd.,Xi'an 710065,Shaanxi Province,China;LONGi Leye Photovoltaic Technology Co.,Ltd.,Xi'an 710018,Shaanxi Province,China)

机构地区：[1]华陆工程科技有限责任公司,陕西西安710065 [2]隆基乐叶光伏科技有限公司,陕西西安710018

出　　处：《化学工程》2022年第7期44-46,共3页Chemical Engineering(China)

摘　　要：以圆形通道传热膜系数的增强因子公式为基础,导出了任意螺旋通道的传热膜系数的通用增强因子的计算公式,从而使所有螺旋类通道中传热膜系数可以通过直线通道传热膜系数和通用增强因子计算出来。文中给出了通用增强因子计算公式的建立过程,并将其应用到螺旋板换热器、螺旋管换热器等,得到相应的通用增强因子的解析表达式。对螺旋板换热器的计算结果表明,通用增强因子大于传统的增强因子,最终导致传热膜系数计算结果增大3.0%—5.0%。A formula to calculate the general enhancement factor(EF)for heat transfer coefficient(HTC)of any spiral channels was derived based on the formula to calculate the EF for HTC of circular channels,thereby,HTC of any spiral channels could be simply calculated using the HTC of straight channels and the calculated general EF.The process of deriving the formula to calculate the general EF was provided in details,then it was applied to the spiral plate heat exchanger and the spiral tube heat exchanger to obtain the corresponding analytical formulae of the general EF.The calculation results of the spiral plate heat exchanger indicate that the obtained general EF is larger than the conventional EF,leading to the calculated HTC increased by 3.0%-5.0%.

关 键 词：螺旋通道 传热膜系数 增强因子 螺旋板换热器 

分 类 号：TL331[核科学技术—核技术及应用]