Study on Freezing of Water Flow inside Tubes

管子和线圈内部的温度下降和冰的形成是经过调查的实验和理论的。管子实验的结果是，在水流中，温度下降几乎同意，由于水流中的温度变化，平静的水是流动时间的函数。一个线圈实验的结果表明，线圈在任何点上的温度变化都保持在0 ° C以上的温度变化，在表面和下降直接在0 ° C以下时，当水不能缓慢地流动到冰上形成。从两个实验中抽取的主要结合是，水温度不应该少于0 ° C，任何地方都有水流向水的设备。根据对理论分析的说法，实际的方法是通过利用波浪流动和湍流流动中的热吸收的协同作用来进行水温度下降和冰形成。这是根据这一方法获得的结果得出的，大致同意一些理论分析和一些条件下的实验日期。在对压力下降和流动速率下降的分析中，对冻结似乎是不确定的。它也发现了当管子或线圈中冻结生成的时候，它直到它关闭了它们的部分。

Temperature drop and ice formation of water flow inside tubes and coils are investigated experimentally and theoretically.The result of a tube experiment is that temperature drop along water flow almost agree with temperature variation of quiescent water on a function of flowing time from an inlet. The result of a coil experiment is that temperature variation at any point in a coil keeps above 0゜C during freezing near the surface and drops immediately below 0゜C, when water can not flows soothly due to ice formation. The main conclusion to be drawn from both experiments is that water temperature should not be less than 0゜C anywhere in the equipments for water to flow always.In regard to theoretical analysis, the practical methods are conducted to obtain water temperature drop and ice formation using the coefficient of heat convection in laminar flow and turbulent flow. It is found that the results obtained by this method approximately agree with ones of theoretical analysis and experimental date under some conditions. The analyses in which the pressure drop and decrease of flow rate with freezing are considered is undertaken. It is also found that when freezing generates in tubes or coils, it is growing until it closes the section of them.