水平管强化池沸腾传热在水套炉中的应用分析

摘要

油气集输换热设备中，更多关注的是强化对流传热的研究和应用，而对于管外强化沸腾换热关注较少。在介绍池沸腾传热相关理论一般性原理的基础上，分析了影响池沸腾传热的主要因素。通过改良换热管外表面结构型式，在换热管表面形成凹凸或多孔的结构，这种结构下沸腾传热提高了一个数量级。选择合适的外界压力能够强化管外沸腾传热，提高了管外换热系数。最后讨论了池沸腾传热计算的有关问题。%The convection heat transfer enhancement were researched and applied widely on heat exchange equipment in oil - gas gathering and transportation. Based on the general principles of pool boiling heat transfer theory, the main influenced factors to pool boiling were analyzed. The outside wall of tube was changed to make it concave - convex or porous surface, the pool boiling heat transfer was enhanced by an order of magnitude. Correct design pressure could make the pool boiling enhancing and improving the heat transfer coefficient outside horizontal tube. Finally, the pool boiling heat transfer calculation was discussed.