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为拓展三相流强化传热和防、除垢技术的应用领域,优化重力热管的传热性能,设计并构建了1套三相流闭式重力热管系统。考察了固含率、加热功率、充液率等参数对于三相流重力热管冷凝段传热性能的影响。结果表明,三相流重力热管可以强化传热。冷凝段对流传热系数随着加热功率的增加而增大,随着充液率的增加而减小。充液率较低时,冷凝段对流传热系数随着固含率的增加而增大;而当充液率较高时,随着固含率的增加,对流传热系数则呈现出先增加,后降低,然后再增加的变化趋势。
In order to expand the application fields of heat transfer, anti-fouling and anti-fouling technology of three-phase flow, the heat transfer performance of gravity heat pipe is optimized and a set of three-phase closed-type gravity heat pipe system is designed and constructed. The effects of solid content, heating power and liquid filling ratio on the heat transfer performance of the condensing section of a three-phase gravity heat pipe were investigated. The results show that three-phase flow gravity heat pipe can enhance heat transfer. Condensate convection heat transfer coefficient increases with the increase of heating power, with the increase of the filling rate decreases. When the liquid filling rate is low, the convective heat transfer coefficient of condensing section increases with the increase of solid content. When the liquid filling rate is high, the convective heat transfer coefficient increases with the increase of solid content, After the reduction, and then increase the trend of change.