Numerical simulation and experiment verification of the static boil-off rate and temperature field for a new independent type B liquefied natural gas ship mock up tank

Wu, Sixian; Ju, Yonglin; Lin, Jichao; Fu, Yunzhun

doi:10.1016/j.applthermaleng.2020.115265

Cited by 23 publications

(8 citation statements)

References 34 publications

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“…For LNG storage and transportation, the inevitable evaporated cryogen must be removed as boil-off gas (BOG) to maintain the tank pressure below the safe limits. The constant-pressure tank evaporates more quickly than the closed tank . Nevertheless, the constantly raised pressure in the closed tank would damage the vessel.…”

Section: Phase Change For Other Purposesmentioning

confidence: 99%

“…Ovidi et al discovered that ethylene has greater self-pressurization, while methane has a broader thermal stratification region in cryogenic storage tanks. Wu et al found that the evaporation rate of liquid nitrogen is about two times that of LNG in the ship mock-up tank because the saturated temperature and latent heat of natural gas are higher than those of nitrogen. Furthermore, LNG is a flammable gas that may ignite and explode during a leak.…”

Section: Phase Change For Other Purposesmentioning

confidence: 99%

“…The constant-pressure tank evaporates more quickly than the closed tank. 388 Nevertheless, the constantly raised pressure in the closed tank would damage the vessel. The methane and nitrogen of LNG will evaporate more rapidly than other components as a result of lower boiling points.…”

Section: Phase Change For Other Purposesmentioning

confidence: 99%

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Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Zhu

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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Phase change is a phenomenon that has been extensively utilized in chemical engineering, energy, electronics, vehicle, and space exploration. From both the science and engineering perspectives, gaining a profound understanding of the intricacies of multiphase flow processes accompanied by heat and mass transfer due to phase change is of fundamental importance. Indeed, the computational fluid dynamics (CFD) has been increasingly applied as an effective tool to give an in-depth and efficient analysis of the phase change processes, thereby enhancing our understanding and capacity to control and optimize the phase change effects in these processes. This paper seeks to provide a comprehensive review of the utilization of CFD methodologies in the simulations of phase change flows across various applications, including temperature management, drying, separation and purification, and others. First, the CFD models at various scales that are developed to elucidate the phase change processes are summarized. Second, the noteworthy advances in the recent CFD simulation work on various phase change processes are presented, respectively. Finally, the challenges and potential prospects to facilitate the application of the phase change flow are discussed. The current review aims to offer insightful guidance for the CFD modeling of phase change processes in numerous engineering application scenarios.

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Section: Phase Change For Other Purposesmentioning

confidence: 99%

Section: Phase Change For Other Purposesmentioning

confidence: 99%

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Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Zhu

Zhang

et al. 2023

Ind. Eng. Chem. Res.

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“…304L is an economical austenitic stainless steel with the excellent corrosion resistance and low temperature toughness, which can effectively prevent the occurrence of malignant brittle fracture accidents. Nowadays, Fe-36Ni and 304L have been widely used in building of LNG ships and LNG-related industries [ 2 , 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Fe-36Ni and 304L Dissimilar Alloy Lap Joints by Pulsed Gas Tungsten Arc Welding

Wang

Shen

et al. 2020

Materials

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High-quality joining of dissimilar alloys between Fe-36Ni alloy and 304L stainless steel is essential in the manufacturing of LNG tanker. In this study, lap joints of Fe-36Ni and 304L dissimilar alloys were fabricated by a pulsed gas tungsten arc welding (P-GTAW) process. The effects of low-frequency pulse on the appearance, microstructure and mechanical properties of the Fe-36Ni/304L lap joints was investigated. With the increase of frequency, the feature sizes of α (the transition angle of the upper surface of Fe-36Ni to the surface of the weld bead) and R (shortest distance between weld root and weld surface) exhibited downtrend and uptrend, respectively, while La (the maximum weld width of lower sheet) and P (the maximum weld penetration of lower sheet) changed in a smaller range. Fusion zone (FZ) is mainly composed of γ phase and M23C6 during solidification, and M23C6 particles are distributed on the grain boundaries of the cells, which reduced the mechanical properties of joint. The average hardness between 110 HV1 and 136 HV1 is lower than that of the base metals. Fractures of all joints located at the Fe-36Ni side near the weld, and a dimple fracture in all samples indicated a ductile fracture. This study found that the heat input values remain 198.86 J mm−1 and increased pulse frequency can improve the maximum tensile force. The average maximum tensile force of the lap weld is 11.95 kN when pulsed frequency is 15 Hz.

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“…Different influence factors, such as initial liquid filling level, sloshing amplitude, and intermittent excitation type on the fluid sloshing characteristics, were evaluated and analyzed. Wu et al 35 developed an unsteady three-dimensional numerical method by using volume of fluid model and Lee phase change model to study the evaporation phenomenon and pressurization performance in an independent type B LNG ship mock up tank. Compared with experimental results, the liquid evaporation under stationary conditions has been greatly predicted.…”

mentioning

confidence: 99%

Study on thermodynamic response in liquefied natural gas storage tanks under static pressurization and sloshing conditions

Sun,

Liu,

Xue

et al. 2024

Asia-Pacific J Chem Eng

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Liquefied natural gas (LNG) is becoming a potential power fuel in ocean transport and will be widely utilized in the near future. However, severe thermodynamic imbalance issues, caused by environmental heat leakage and external sloshing disturbances, must to be efficiently addressed to improve the operation reliability and safety storage of LNG fuel tanks. In this paper, a comprehensive theoretical model is developed to investigate the thermal response in a type C LNG storage tank, with consideration of composition migration, heat penetration, liquid evaporation, fluid sloshing, and vapor pressure rise. The prediction accuracy of the theoretical model is validated by comparing with selected tank pressurization experiments, with deviation limited within 5.0%. Based on the theoretical model, the aging process of LNG is first involved. The variations of composition migration in vapor and liquid regions are specially considered and discussed. During static pressurization, the thermal physical performance, including tank pressure rise, vapor temperature change, and boil‐off gas (BOG) generation, is detailedly researched under heat penetration. Finally, the effect of external sloshing excitation on thermal behavior in LNG fuel tanks is explored. Compared to static pressurization, external sloshing excitation causes obvious influences on thermodynamic performance of LNG tanks, including promotion on tank pressure and enhancement of heat and mass transfer. With some valuable conclusions achieved, this work is significant to comprehensive understanding on the thermal response of LNG storage tanks under different operation conditions.

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Numerical simulation and experiment verification of the static boil-off rate and temperature field for a new independent type B liquefied natural gas ship mock up tank

Cited by 23 publications

References 34 publications

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Recent Advances in CFD Simulations of Multiphase Flow Processes with Phase Change

Microstructure and Mechanical Properties of Fe-36Ni and 304L Dissimilar Alloy Lap Joints by Pulsed Gas Tungsten Arc Welding

Study on thermodynamic response in liquefied natural gas storage tanks under static pressurization and sloshing conditions

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