管内加电伴热装置熔盐熔化过程数值模拟研究

马瑞; 任志恩; 郭嘉敏; 朱锐; 王峰; 杨晓艳

doi:10.19912/j.0254-0096.tynxb.2025-0216

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太阳能学报 ›› 2026, Vol. 47 ›› Issue (6) : 799-805. DOI: 10.19912/j.0254-0096.tynxb.2025-0216

管内加电伴热装置熔盐熔化过程数值模拟研究

马瑞¹, 任志恩¹, 郭嘉敏¹, 朱锐¹, 王峰¹, 杨晓艳²

作者信息 +

NUMERICAL SIMULATION STUDY ON MELTING PROCESS OF MOLTEN SALT IN PIPE WITH ELECTRIC HEAT TRACING DEVICE

Ma Rui¹, Ren Zhien¹, Guo Jiamin¹, Zhu Rui¹, Wang Feng¹, Yang Xiaoyan²

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文章历史 +

摘要

建立内置电伴热装置水平管道二维模型,模拟混合熔盐纳米流体在熔化过程中固-液交界面的位置、形状和温度场的分布,分析不同斯蒂数（Ste）和电伴热装置的尺寸对整个熔盐熔化过程的影响。结果表明,随着加热时长的增加,电伴热装置与相界面之间的距离增加,温度向固相区熔盐传递随热阻的增大而逐渐变缓。加热时间持续至3082 s时,熔盐纳米流体完全熔化。当Ste由0.392分别增至0.706和1.021时,熔盐纳米流体完全熔化时间分别减少66%和81%;与5 mm直径的电伴热装置相比较,直径为10 mm和20 mm的电伴热装置熔盐熔化效率分别提高68%和82%,熔盐完全熔化的时间分别为1100 s和623 s。

Abstract

In this paper, a two-dimensional model of horizontal pipeline with built-in electric heat tracing device is established to simulate the position, shape and temperature field distribution of solid-liquid interface of mixed molten salt nanofluid during the melting process, and to analyze the influence of different Ste and the size of the electric heat tracing device on the whole molten salt melting process. The results indicate that, as the heating duration increases, the distance between the electric heating system and the phase interface increases, and the transfer of heat to the molten salt in the solid phase gradually slows down due to the increase in thermal resistance. and the molten salt nanofluid is completely melted when the heating time lasts for 3082 s. The temperature of the solid-liquid interface is reduced by the influence of the thermal resistance of the electric trace heating device. When Ste increases from 0.392 to 0.706 and 1.021, the complete melting time of the molten salt nanofluid is reduced by 66% and 81%, respectively; compared with the 5 mm diameter electric trace heating device, the melting efficiency of the molten salt of the electric trace heating device with diameters of 10 mm and 20 mm is increased by 68% and 82%, and the time of complete melting of the molten salt is 1100 s and 623 s, respectively.

导出引用

马瑞, 任志恩, 郭嘉敏, 朱锐, 王峰, 杨晓艳. 管内加电伴热装置熔盐熔化过程数值模拟研究[J]. 太阳能学报. 2026, 47(6): 799-805 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0216

Ma Rui, Ren Zhien, Guo Jiamin, Zhu Rui, Wang Feng, Yang Xiaoyan. NUMERICAL SIMULATION STUDY ON MELTING PROCESS OF MOLTEN SALT IN PIPE WITH ELECTRIC HEAT TRACING DEVICE[J]. Acta Energiae Solaris Sinica. 2026, 47(6): 799-805 https://doi.org/10.19912/j.0254-0096.tynxb.2025-0216

中图分类号： TK124

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