研究结果表明，与传统的光滑管弓形隔板换热器相比，板式换热器能非常有效地强化空气侧的膜传热系数。
The results showed that compared to conventional smooth segment baffle heat exchanger, the plate heat exchanger(PHE) can effectively strengthen the film heat transfer coefficient of the shell side.
结果表明，提高对流传热系数是提高膜蒸馏热效率和渗透通量的关键。
It appears that improvement of convective heat transfer is very important for enhancement of flux and heat efficiency.
采用混合管束既可获得高的总传热系数和管内外传热膜系数，又可以使管内压降不致过大。
Using mixed tube bundle, high heat transfer coefficient can be acquired as well as pressure drop not too high.
分析了影响伞板式降膜蒸发器传热的主要因素，得到了伞板降膜蒸发侧无因次传热系数的实验关联式；
The influence factors of the heat transfer performance and the formula of the heat transfer coefficient on the evaporation side in the umbrella-plate have been obtained.
同向切应力具有减薄液膜厚度和增大传热系数的作用；
The cocurrent shear plays the roles on thinning film thickness and enhancing heat transfer, and the countercurrent shear has inverse effect.
同向切应力具有减薄液膜厚度和增大传热系数的作用；
The cocurrent shear plays the roles on thinning film thickness and enhancing heat transfer, and the countercurrent shear has inverse effect.
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