THERMAL PERFORMANCE ANALYSIS OF U-TUBE SHELL AND TUBE MOLTEN SALT STEAM GENERATOR FOR SOLAR THERMAL POWER GENERATION

Liu Zi; Wang Yuwei; Shuai Zhengfeng; Zhang Junfeng; Shen Yajun; Wang Yueshe

doi:10.19912/j.0254-0096.tynxb.2024-2147

PDF(2690 KB)

Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 768-774. DOI: 10.19912/j.0254-0096.tynxb.2024-2147

THERMAL PERFORMANCE ANALYSIS OF U-TUBE SHELL AND TUBE MOLTEN SALT STEAM GENERATOR FOR SOLAR THERMAL POWER GENERATION

Liu Zi¹, Wang Yuwei¹, Shuai Zhengfeng¹, Zhang Junfeng², Shen Yajun², Wang Yueshe³

Author information +

History +

Abstract

Due to the high operating temperature of the generator in the solar thermal power plant, the significant temperature difference between the molten salt （shell-side hot fluid） and the saturated water （tube-side cold fluid）, along with the substantial pressure differential between the shell and tube sides, induces considerable stress on the heat exchange tubes. This study establishes a three-dimensional numerical model for convective heat transfer of molten salt in the shell-side tubes. It calculates the stresses caused by thermal loads, pressure loads, and their combined effects, investigating the influence of temperature and pressure on tube stress. The stress distribution patterns under these three loading conditions are presented. The results indicate that pressure loads have a more significant impact on tube stress compared to thermal loads. As the thermal load increases, the maximum total stress on the heat exchange tube rises from 40 MPa to 76.3 MPa, occurring at the first baffle cut.

Key words

solar thermal power generation / heat exchangers / stress analysis / fluid structure interaction / molten salt

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Liu Zi, Wang Yuwei, Shuai Zhengfeng, Zhang Junfeng, Shen Yajun, Wang Yueshe. THERMAL PERFORMANCE ANALYSIS OF U-TUBE SHELL AND TUBE MOLTEN SALT STEAM GENERATOR FOR SOLAR THERMAL POWER GENERATION[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 768-774 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2147

References

[1] 董新宇, 张宇轩, 孟凡泰, 等. 熔盐横向冲刷过冷沸腾水传热特性实验研究[J]. 太阳能学报, 2023, 44(12): 121-129.
DONG X Y, ZHANG Y X, MENG F T, et al.Experimental investigation on heat transfer characteristic of molten salt flow across subcooled boiling water[J]. Acta energiae solaris sinica, 2023, 44(12): 121-129.
[2] 董新宇, 张舒蕾, 张宇轩, 等. 熔盐横向冲刷管内汽-液两相流传热特性实验研究[J]. 太阳能学报, 2023, 44(7): 241-247.
DONG X Y, ZHANG S L, ZHANG Y X, et al.Experimental investigation on heat transfer characteristic of molten salt flow across vapor-liquid two-phase flow in tube[J]. Acta energiae solaris sinica, 2023, 44(7): 241-247.
[3] TRAFCZYNSKI M, MARKOWSKI M, URBANIEC K, et al.Estimation of thermal effects of fouling growth for application in the scheduling of heat exchangers cleaning[J]. Applied thermal engineering, 2021, 182: 116103.
[4] 许蕾, 钱才富, 刘久逸, 等. 浮头换热器管板热应力分析[J]. 压力容器, 2015, 32(6): 55-60.
XU L, QIAN C F, LIU J Y, et al.Thermal stress analysis at the tubesheet of floating-head heat exchangers[J]. Pressure vessel technology, 2015, 32(6): 55-60.
[5] 刘丽芳, 戴波, 张震. 基于热-力耦合分析的换热器管板强度校核[J]. 工程建设, 2022, 54(12): 20-26.
LIU L F, DAI B, ZHANG Z.Strength check of tube sheets of heat exchangers based on thermal-mechanical coupling analysis[J]. Engineering construction, 2022, 54(12): 20-26.
[6] 于春柳, 任金平, 廖武平. 换热器折流板间距和换热管排布形式对管板热应力影响分析[J]. 当代化工, 2020, 49(11): 2574-2578.
YU C L, REN J P, LIAO W P.Analysis on the influence of baffle spacing and tube arrangement on thermal stress of tube sheet in heat exchangers[J]. Contemporary chemical industry, 2020, 49(11): 2574-2578.
[7] 谭蔚, 杨星, 杨向涛. 高参数换热器管板热应力分析模型的研究[J]. 压力容器, 2011, 28(2): 44-50.
TAN W, YANG X, YANG X T.Study on analytical models of thermal stress in tube sheet of heavy duty heat exchanger[J]. Pressure vessel technology, 2011, 28(2): 44-50.
[8] 肖军, 武学素, 庄贺庆, 等. 快堆蒸汽发生器沸腾传热恶化引起的热应力计算和分析[J]. 核动力工程, 1992, 13(3): 63-68.
XIAO J, WU X S, ZHUANG H Q, et al.Calculation and analysis of dryout-lnduced thermal stress in LMFBR steam generator tubes[J]. Nuclear power engineering, 1992, 13(3): 63-68.
[9] SHIN K I, PARK J H, KIM H D, et al.Simulation of stress corrosion crack growth in steam generator tubes[J]. Nuclear engineering and design, 2002, 214(1/2): 91-101.
[10] 孙宝芝, 郑陆松, 韩文静, 等. 基于流固耦合的蒸汽发生器换热管结构应力分析[J]. 化工学报, 2014, 65(S1): 364-370.
SUN B Z, ZHENG L S, HAN W J, et al.Analysis on structural stress of tube in steam generator based on fluid-structure interaction[J]. CIESC journal, 2014, 65(S1): 364-370.
[11] SUN B Z, YANG Y L.Numerically investigating the influence of tube support plates on thermal-hydraulic characteristics in a steam generator[J]. Applied thermal engineering, 2013, 51(1/2): 611-622.
[12] 王任. ASME BPVC.Ⅷ.1-2021中换热管与管板连接焊缝强度计算及探讨[J]. 化工设计, 2023, 33(3): 29-32.
WANG R.Calculation and discussion of the connection weld seam strength between heat exchange tubes and tubesheets in ASME BPVC. Ⅷ. 1-2021[J]. Chemical engineering design, 2023, 33(3): 29-32.
[13] 林宗虎. 气液两相流和沸腾传热[M]. 西安: 西安交通大学出版社, 1987.
LIN Z H.Gas-liquid two-phase flow and boiling heat transfer[M]. Xi’an: Xi’an Jiaotong University Press, 1987.
[14] 李维特, 黄保海, 毕仲波. 热应力理论分析及应用[M]. 北京: 中国电力出版社, 2004.
LI W T, HUANG B H, BI Z B.Theoretical analysis and application of thermal stress[M]. Beijing: China Electric Power Press, 2004.