波纹板式换热器传热与流动特性分析  

Analysis of Heat Transfer and Flow Characteristics of Corrugated Plate Heat Exchanger

作　　者：白书诚 吴俐俊[1] 田梦雨 BAI Shu-cheng;WU Li-jun;TIAN Meng-yu(College of Mechanical and Energy Engineering,Tongji University,Shanghai,China,201804)

机构地区：[1]同济大学机械与能源工程学院,上海201804

出　　处：《热能动力工程》2022年第6期114-121,共8页Journal of Engineering for Thermal Energy and Power

基　　金：国家重点研发计划(2020YFC1910100)。

摘　　要：通过数值模拟的方式,对一种用于低粘度流体的波纹板式换热器的传热特性和阻力性能进行分析,以控制变量法分析了流体速度对传热特性及阻力性能的影响;搭建了板式换热器测试平台,验证了数值模拟结果的正确性和可行性;用等速法拟合了Nu-Re与Eu-Re的相关准则式,并采用JF因子评价换热器综合性能。结果表明:模拟结果与实验结果相比误差在10%以内;当流体流速小于1.0 m/s时,换热器传热系数和压降随着流速的增大而增大,但综合换热性能逐渐变差,在此流速范围内,总传热系数随冷流体进口温度升高而增大。Through numerical simulation,the heat transfer characteristics and resistance performance of corrugated plate heat exchanger used in low viscosity fluid were analyzed,and the influence of fluid velocity on heat transfer characteristics was analyzed by means of control variable method.The test platform of plate heat exchanger was built to verify the correctness and feasibility of the numerical simulation results;the correlation criterion formulas of Nu-Re and Eu-Re were fitted by the isokinetic method,and the comprehensive performance of heat exchanger was evaluated by JF factor.The results show that the error between the simulation results and the experimental results is less than 10%;when the fluid flow rate is less than 1.0 m/s,the heat transfer coefficient and pressure drop of the plate heat exchanger enhance with the increase of the fluid flow rate,but the comprehensive heat transfer performance of plate heat exchanger deteriorates gradually;the total heat transfer coefficient increases with the inlet temperature rise of the cold fluid within this flow rate range.

关 键 词：板式换热器 数值模拟 等速法 传热和阻力特性 准则关系式 

分 类 号：TK172[动力工程及工程热物理—热能工程]