缠绕管式换热器全模型研究  

Study on the full model of spiral wound heat exchanger

作　　者：李佳旭 怀英[1] 刘婷婷[1] 刘应春 LI Jiaxu;HUAI Ying;LIU Tingting;LIU Yingchun(Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院大连化学物理研究所,辽宁大连116023 [2]中国科学院大学,北京100049

出　　处：《化工学报》2023年第12期4820-4828,共9页CIESC Journal

基　　金：国家自然科学基金项目(22073095);大连市科技创新基金项目(2021JJ11CG006);榆林清洁能源实验室研究基金项目(DNLYLA202208);辽宁省自然科学基金项目(2020-MS-022)。

摘　　要：缠绕管式换热器由于结构紧凑、换热效率高,在化工领域有广泛的应用,但其复杂性也为研究带来困难。利用mixture模型和相变模型构建了全三维尺度下的数值方法,实现了缠绕管式换热器壳程和管程流动、传热过程的计算。搭建了米级换热器实验及测试平台,建立了相应的全三维、同尺寸数值模型;采用Lee相间传质模型,实现了蒸发-冷凝模拟,获得换热器器件尺度传热系数和相变总量。计算的传热系数与实验测量值的相对误差为4.98%。基于所构建的全模型,数值研究了操作条件对传热特性和相变的影响,分析了换热段长度和缠绕管层数对传热性能的影响,为缠绕管式换热器的设计开发提供了数据和平台支持。Spiral wound tube heat exchangers(SWHE)are widely used in the chemical industry due to their compact structure and high heat transfer efficiency.However,their complexity also brings difficulties to research.In this article,a three-dimensional numerical model of SWHE is established by the mixture model and phase transition model to investigate flow and heat transfer characteristics in both shell side and tube side.To achieve this goal,an overall geometric model with the same size as the experimental equipment is constructed.Then,a whole physical model of the phase-change heat transfer process is developed by employing the mixture model and interface mass transfer model.The proposed model is validated by the experimental data.The validation results show that the simulation data can agree with the experimental data with a deviation of 4.98%.The influences of operating conditions on heat transfer characteristics and phase change are investigated by using this model.The effects of the heat exchanger length and the number of layers are also analyzed.The paper provides numerical methods and data for the design purpose of SWHE.

关 键 词：缠绕管式换热器 整体几何模型 相变 传热 数值模拟 

分 类 号：TQ021.1[化学工程]