Natural convection heat transfer of molten salt in a single energy storage tank
Natural convection heat transfer of molten salt in a single energy storage tank
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DOI：
10.1007/s11431-016-6086-2
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发表时间：
2016-07
期刊：
影响因子：
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通讯作者：
Yuan-wei Lu;Qiang Yu;W. Du;Yu-ting Wu;Chong-fang Ma
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文献类型：
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作者：
Yuan-wei Lu;Qiang Yu;W. Du;Yu-ting Wu;Chong-fang Ma
通过数值模拟和实验研究了圆柱形蓄能槽内熔盐的传热，得到了单个蓄能槽内熔盐的自然对流换热。模拟和实验结果表明，圆柱形贮箱中水的自然对流换热符合Garon的关联式。然而，由于熔盐的高粘度和低导热系数，当使用Garon的关联式来预测熔盐的自然对流换热时，会出现显著的偏差。而熔盐自然对流换热的模拟数据与实验结果吻合较好。因此，在本研究中，提出了一个考虑可变物理性质的影响的关联式来预测熔盐的自然对流换热。目前的数据与建议的相关性的偏差小于± 20%。研究结果可为单罐储能系统的设计提供依据。
Heat transfer in molten salt in a cylinder tank is studied via simulation and experiment to obtain its natural convection heat transfer in a single energy storage tank. Simulation and experimental results show that the natural convection heat transfer of water in a cylinder tank fits well with Garon’s correlation. However, significant deviations occur when Garon’s correlation is used to predict the natural convection heat transfer of molten salt because of its high viscosity and low thermal conductivity. However, the simulated data of the natural convection heat transfer of molten salt fit well with those of the experimental results. Thus, a correlation that considers the effect of variable physical properties is proposed in this study to predict the natural convection heat transfer of molten salt. The deviation of the present data from the proposed correlation is less than ±20%. The results of this study can serve as a basis for the design of single energy storage tanks.