Full Text:   <1968>

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CLC number: TH71

On-line Access: 2021-12-15

Received: 2021-01-06

Revision Accepted: 2021-05-29

Crosschecked: 2021-12-05

Cited: 0

Clicked: 3058

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Hao Zhou

https://orcid.org/0000-0001-9779-7703

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Journal of Zhejiang University SCIENCE A 2021 Vol.22 No.12 P.979-991

http://doi.org/10.1631/jzus.A2100011


Experimental investigation of migration and solidification of molten salt leaking through tank cracks


Author(s):  Hua Shi, Hao Zhou, Peng-nan Ma, Jian-kang Wang, Hao Fang, Jia-wei Luo, Kun-zan Qiu

Affiliation(s):  State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   zhouhao@zju.edu.cn

Key Words:  Molten salt, Leaking, Migration, Crack, Foundation material


Hua Shi, Hao Zhou, Peng-nan Ma, Jian-kang Wang, Hao Fang, Jia-wei Luo, Kun-zan Qiu. Experimental investigation of migration and solidification of molten salt leaking through tank cracks[J]. Journal of Zhejiang University Science A, 2021, 22(12): 979-991.

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author="Hua Shi, Hao Zhou, Peng-nan Ma, Jian-kang Wang, Hao Fang, Jia-wei Luo, Kun-zan Qiu",
journal="Journal of Zhejiang University Science A",
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pages="979-991",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2100011"
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%T Experimental investigation of migration and solidification of molten salt leaking through tank cracks
%A Hua Shi
%A Hao Zhou
%A Peng-nan Ma
%A Jian-kang Wang
%A Hao Fang
%A Jia-wei Luo
%A Kun-zan Qiu
%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A2100011

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A1 - Hua Shi
A1 - Hao Zhou
A1 - Peng-nan Ma
A1 - Jian-kang Wang
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A1 - Jia-wei Luo
A1 - Kun-zan Qiu
J0 - Journal of Zhejiang University Science A
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DOI - 10.1631/jzus.A2100011


Abstract: 
molten salt is often used for heat transfer and thermal energy storage in concentrated solar power. molten salt leakage and migration is a significant issue in its application. molten salt migration and solidification in thermal porous foundation materials through cracks are experimentally investigated. The impact of factors, including crack length and width, operation temperature, and leakage mass of molten salt, are studied through an experimental device modeling the leakage of the actual molten salt storage tank. Experimental results show that the crack width and length slightly affect the migration depth, but directly affect the shape of the agglomeration of solidified salt and porous foundation material. The most important factor affecting the migration depth of molten salt leaking through cracks is the tank operating temperature. The molten salt migration depth when the operating temperature is 500 °C is 95.8% higher than that with an operating temperature of 300 °C. As the leakage molten salt mass reached 400 g, the average migration width increased by 23.6%, but the migration depth only increased by 5.2%. It is found that the foundation material temperatures after leakage accidents increase with an increase in the mass of leaked molten salt.

熔盐沿储罐缝隙泄漏的迁移与凝固实验研究

目的:高温熔盐泄漏后在多孔材料中的渗流和凝固问题对于泄漏事故的处理具有重要的意义,但目前仅有少量关于熔盐在冷态沙子或土壤中渗流的研究.本文通过实验研究高温熔盐通过储罐缝隙泄漏流入热稳态地基材料的渗流特性,并测量不同条件(包括缝隙尺寸、熔盐运行温度和熔盐泄漏量等)下的熔盐渗流范围,以期为高温储罐的环境污染处理和熔盐储罐的泄漏检测等工作提供参考.
创新点:1. 搭建模拟储罐熔盐泄漏的热态试验装置;2. 研究缝隙长度和宽度对熔盐泄漏和迁移的影响.
方法:1. 通过自行搭建的熔盐泄漏热态试验装置,研究熔盐运行温度、缝隙长度、缝隙宽度和泄漏熔盐质量对熔盐在地基中的迁移和凝固的影响; 2. 通过理论分析,解释泄漏事故后地基材料的热稳定温度随泄漏熔盐质量的增加而升高的具体原因.
结论:1. 当缝隙宽度为3~10 mm和缝隙长度为5~30 mm时,熔盐渗流深度和平均渗流宽度均变化不大,但熔盐在地基材料上部的渗流宽度会随缝隙尺寸的增大而明显增大.2. 当熔盐通过缝隙泄漏在地基材料中时,储罐的运行温度是影响熔盐渗流深度的最重要因素.3. 泄漏熔盐质量在一定范围内的增加对熔盐渗流深度影响不大;渗流宽度会随熔盐质量的增大而增大;泄漏事故后地基材料的热稳定温度随泄漏熔盐质量的增加而升高.

关键词:熔盐;泄漏;迁移;缝隙;地基材料

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Reference

[1]Abdulla A, Reddy KS, 2017. Effect of operating parameters on thermal performance of molten salt packed-bed thermocline thermal energy storage system for concentrating solar power plants. International Journal of Thermal Sciences, 121:30-44.

[2]Bonilla J, Rodríguez-García MM, Roca L, et al., 2018. Design and experimental validation of a computational effective dynamic thermal energy storage tank model. Energy, 152:840-857.

[3]Bremer K, Meinhardt-Wollweber M, Thiel T, et al., 2014. Sewerage tunnel leakage detection using a fibre optic moisture-detecting sensor system. Sensors and Actuators A: Physical, 220:62-68.

[4]Chieruzz M, Cerritelli GF, Miliozzi A, et al., 2017. Heat capacity of nanofluids for solar energy storage produced by dispersing oxide nanoparticles in nitrate salt mixture directly at high temperature. Solar Energy Materials and Solar Cells, 167:60-69.

[5]Du BC, He YL, Zheng ZJ, et al., 2016. Analysis of thermal stress and fatigue fracture for the solar tower molten salt receiver. Applied Thermal Engineering, 99:741-750.

[6]Ferri R, Cammi A, Mazzei D, 2008. Molten salt mixture properties in RELAP5 code for thermodynamic solar applications. International Journal of Thermal Science, 47(12):1676-1687.

[7]Flueckiger S, Yang Z, Garimella SV, 2011. An integrated thermal and mechanical investigation of molten-salt thermocline energy storage. Applied Energy, 88(6):2098-2105.

[8]Gomes A, Navas M, Uranga N, et al., 2019. High-temperature corrosion performance of austenitic stainless steels type AISI 316L and AISI 321H, in molten Solar Salt. Solar Energy, 177:408-419.

[9]Huang J, Zhou ZD, Zhang DS, et al., 2013. A fiber Bragg grating pressure sensor and its application to pipeline leakage detection. Advances in Mechanical Engineering, 5:590451.

[10]Im IT, Kim WS, Lee KS, 2001. A unified analysis of filling and solidification in casting with natural convection. International Journal of Heat and Mass Transfer, 44(8):1507-1515.

[11]Janz GJ, 1967. Molten Salts Handbook. Academic Press, New York, USA.

[12]Li XL, Xu ES, Song S, et al., 2017. Dynamic simulation of two-tank indirect thermal energy storage system with molten salt. Renewable Energy, 113:1311-1319.

[13]Liao ZR, Li X, Wang ZF, et al., 2014. Phase change of molten salt during the cold filling of a receiver tube. Solar Energy, 101:254-264.

[14]Lu JF, Ding J, Yang JP, 2010. Solidification and melting behaviors and characteristics of molten salt in cold filling pipe. International Journal of Heat and Mass Transfer, 53(9-10):1628-1635.

[15]Lu JF, Shen XY, Ding J, et al., 2013. Convective heat transfer of high temperature molten salt in transversely grooved tube. Applied Thermal Engineering, 61(2):157-162.

[16]Ou XX, Zhang X, Lowe T, et al., 2017. X-ray micro computed tomography characterization of cellular SiC foams for their applications in chemical engineering. Materials Characterization, 123:20-28.

[17]Prieto C, Osuna R, Fernández AI, et al., 2016a. Molten salt facilities, lessons learnt at pilot plant scale to guarantee commercial plants; heat losses evaluation and correction. Renewable Energy, 94:175-185.

[18]Prieto C, Osuna R, Fernández AI, et al., 2016b. Thermal storage in a MW scale. Molten salt solar thermal pilot facility: plant description and commissioning experiences. Renewable Energy, 99:852-866.

[19]Sun H, Wang JQ, Tang ZF, et al., 2020. Assessment of effects of Mg treatment on corrosivity of molten NaCl-KCl-MgCl2 salt with Raman and infrared spectra. Corrosion Science, 164:108350.

[20]Vialle S, Druhan JL, Maher K, 2016. Multi-phase flow simulation of CO2 leakage through a fractured caprock in response to mitigation strategies. International Journal of Greenhouse Gas Control, 44:11-25.

[21]Wan ZJ, Wei JJ, Qaisrani MA, et al., 2020. Evaluation on thermal and mechanical performance of the hot tank in the two-tank molten salt heat storage system. Applied Thermal Engineering, 167:114775.

[22]Weisbrod N, Niemet MR, Rockhold ML, et al., 2004. Migration of saline solutions in variably saturated porous media. Journal of Contaminant Hydrology, 72(1-4):109-133.

[23]Wu JQ, Ding J, Lu JF, et al., 2017. Migration and phase change phenomena and characteristics of molten salt leaked into soil porous system. International Journal of Heat and Mass Transfer, 111:312-320.

[24]Wu M, Xu C, He YL, 2016. Cyclic behaviors of the molten-salt packed-bed thermal storage system filled with cascaded phase change material capsules. Applied Thermal Engineering, 93:1061-1073.

[25]Xu L, Stein W, Kim JS, et al., 2018. Three-dimensional transient numerical model for the thermal performance of the solar receiver. Renewable Energy, 120:550-566.

[26]Yang XP, Yang XX, Qin FGF, et al., 2016. Experimental investigation of a molten salt thermocline storage tank. International Journal of Sustainable Energy, 35(6):606-614.

[27]Yao F, Bi QC, Dong XY, 2018. Convective heat transfer of high temperature molten salt flowing across tube bundles of steam generator in a solar thermal plant. Applied Thermal Engineering, 141:858-865.

[28]Yin HB, Ding J, Jiang RH, et al., 2017. Thermocline characteristics of molten-salt thermal energy storage in porous packed-bed tank. Applied Thermal Engineering, 110:855-863.

[29]Yuan F, Li MJ, Ma Z, et al., 2018. Experimental study on thermal performance of high-temperature molten salt cascaded latent heat thermal energy storage system. International Journal of Heat and Mass Transfer, 118:997-1011.

[30]Zafari M, Panjepour M, Emami MD, et al., 2015. Microtomography-based numerical simulation of fluid flow and heat transfer in open cell metal foams. Applied Thermal Engineering, 80:347-354.

[31]Zhang YY, Wu JQ, Wang WL, et al., 2019. Experimental and numerical studies on molten salt migration in porous system with phase change. International Journal of Heat and Mass Transfer, 129:397-405.

[32]Zhou H, Shi H, Zhang JK, et al., 2020a. Experimental and numerical investigation of temperature distribution and heat loss of molten salt tank foundation at different scales. Heat and Mass Transfer, 56(10):2859-2869.

[33]Zhou H, Shi H, Lai ZY, et al., 2020b. Migration and phase change study of leaking molten salt in tank foundation material. Applied Thermal Engineering, 170:114968.

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