Based on analyzing the characteristics of partial filmwise condensation process external of a horizontal tube with dual components ( TFE/ NMP), the heat and mass transfer model of the partial filmwise condensation were developed. 通过对水平管外双组分(TFE/NMP为三氟乙醇/氮甲基吡咯烷酮)部分膜状冷凝过程特点的分析,建立起部分膜状冷凝过程中热质传递过程的物理模型。
Investigation of dropwise and filmwise coexisting condensation heat transfer prediction model using artificial neural networks 基于人工神经网络的滴膜共存冷凝传热模型的研究
A surface free energy difference criterion, i. e. the surface free energy difference between condensate liquid at condensation temperature and solid surface, was proposed to predict whether filmwise or dropwise condensation of a vapor occurs on a solid surface. 提出了蒸汽在固体表面上冷凝方式的表面自由能差判据,即冷凝温度下液体表面自由能与固体表面的表面自由能差大于33.3mJ·m-2时蒸汽在该表面上呈现滴状冷凝的必要条件。
In order to study the influence of surface-free-energy difference of solid surface and condensate on the filmwise condensation heat transfer performance, a correlation of the condensation heat transfer coefficient with contact angle has been derived with respect to liquid film flow and heat transfer at vapor-liquid interface. 为了考察固液表面自由能差对膜状冷凝传热系数的影响,本文从液膜流动的角度出发,推导出了接触角与冷凝传热系数的关联式。
A Study of Laminar Filmwise Condensation on Different Vertical Surfaces 沿不同垂直表面进行层流膜状冷凝的研究
Study of TFE/ NMP partial filmwise condensation heat and mass coupling transfer on horizontal tube 水平管外TFE/NMP部分膜状冷凝热、质耦合传递过程研究
This value is usually 3 to 4 times of that of filmwise condensation heat transfer. 与纯粹膜状冷凝相比,冷凝传热系数提高3-4倍。
The process of water heat transfer in heat exchanger is film condensation heat transfer, and the condensation coefficient of heat transfer is gotten by the formula of laminar film condensation heat transfer. A Study of Laminar Filmwise Condensation on Different Vertical Surfaces 而蒸汽与换热器中水的传热属于膜状凝结换热,可按层流膜状凝结换热公式计算出换热系数;沿不同垂直表面进行层流膜状冷凝的研究
Turbulent Convection Filmwise Condensation in the Presence of Noncondensable Gas Along a Horizontal Flat-Plate 含有不凝性气体的蒸气在水平平板上紊流对流膜状凝结换热