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学者姓名：黄鑫
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Abstract ：
当液氨管道处于事故泄漏、停输超压或计划维护等情况时,可采用泄放的方式对管内液氨进行泄压回收.由于氨的高体积膨胀性,其泄放过程的节流效应会导致管内温度骤降,加剧管道受冷收缩和脆性断裂的风险.针对目前液氨管道泄放特性研究不足,参考国内外相关设计和运行参数,建立液氨管道泄放仿真模型,探讨管长、管径和操作条件(温度、压力)影响下的泄放特征参数发展规律.研究结果表明:随着管道长度减小,泄放初期管内压降和温降增大,泄放过程压力和温度随时间下降幅度增加;随着管径减小,泄放口初始压力和温度下降幅度增大,泄放时间和泄放最低温度减小;管道运行压力对整体泄放过程影响较小;管道运行温度越低,泄放口初始温降越大,泄放所需时间越长.研究成果将为液氨管道紧急泄放的安全控制和应急方案的制定提供重要依据.
Keyword ：
仿真模拟 仿真模拟 影响因素 影响因素 泄放 泄放 液氨管道 液氨管道 特征参数 特征参数
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| GB/T 7714 | 尹鹏博 , 林涌滨 , 滕霖 et al. 液氨管道泄放特性及影响因素研究 [J]. | 化学工程 , 2025 , 53 (2) : 78-83 . |
| MLA | 尹鹏博 et al. "液氨管道泄放特性及影响因素研究" . | 化学工程 53 . 2 (2025) : 78-83 . |
| APA | 尹鹏博 , 林涌滨 , 滕霖 , 李卫东 , 黄鑫 , 李臻超 et al. 液氨管道泄放特性及影响因素研究 . | 化学工程 , 2025 , 53 (2) , 78-83 . |
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氨作为高效的储氢载体,具有替代化石燃料能源的巨大潜力.利用成品油管道增输液氨,可充分利用管道运能,节约输送成本.液氨-成品油混合体系的相平衡问题对于管输工艺具有重要意义,此外减压过程会引起更为复杂的相变问题.针对液氨-成品油混合体系进行实验研究,初步阐述了氨/油(体积比)和含水率对液氨-成品油混合体系相平衡和减压相变的影响规律,得到了液氨-成品油混合体系的相平衡压力,揭示了液氨-成品油混合体系减压过程的相变现象.研究发现,在0～30℃,氨-油混合体系的平衡蒸气压小于两种纯组分的饱和蒸气压,而在-2～0℃大于纯液氨的饱和蒸气压,并在氨/油(体积比)为70∶30时达到最大值.同时水分的存在会降低氨-油混合体系的平衡蒸气压.氨-油无水混合体系在减压过程中会产生气泡,压力越低气泡增多,发泡行为越剧烈.含水液氨-成品油混合体系在减压过程中会产生液滴群,并慢慢变大且聚并,在减压结束后聚并形成大液滴留在底部.上述研究成果对成品油管道增输液氨技术发展和应用具有重要的理论指导意义.
Keyword ：
成品油 成品油 液氨 液氨 相变 相变 相平衡 相平衡
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| GB/T 7714 | 黄鑫 , 李逸龙 , 李卫东 et al. 液氨-成品油混合体系相平衡及减压相变规律研究 [J]. | 化工学报 , 2025 , 76 (1) : 71-80 . |
| MLA | 黄鑫 et al. "液氨-成品油混合体系相平衡及减压相变规律研究" . | 化工学报 76 . 1 (2025) : 71-80 . |
| APA | 黄鑫 , 李逸龙 , 李卫东 , 施鸿翔 , 尹鹏博 , 李臻超 et al. 液氨-成品油混合体系相平衡及减压相变规律研究 . | 化工学报 , 2025 , 76 (1) , 71-80 . |
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Abstract ：
The droplet dynamic model under an electric field is established in this paper by coupling electric equations, multiphase flow equations, and isoAdvector interface capture method, accurately predicting the deformation and rupture characteristics of multiple emulsion droplets affected by an electric field. The evolutions of the flow field and electric field during the deformation and breakup processes of multiple emulsion droplets subjected to an electric field are elucidated and the effects of the electric capillary number Ca and the radius ratio R* of the inner and outer droplets on the characteristics of droplet deformation and rupture are analyzed. The results show that in the silicone oil/water emulsion system, the inner droplet is difficult to induce charge since the electrostatic shielding effect of the outer droplet, and it has no impact on the equilibrium deformation of the outer droplet; whereas in the castor oil/silicone oil emulsion system, the charge is induced on the interfaces of both the internal and external droplets and the internal droplet has a remarkable impact on the equilibrium deformation of the external droplet. Furthermore, deformation-breakup phase diagrams of multiple emulsion droplets exposed to the electric field are obtained. As R* increases, the Cac for droplet breakup decreases, indicating that the internal droplet intensifies the breakup of the external droplet. The results are significant for the promotion and application of electric field-driven droplet manipulation technology.
Keyword ：
Breakup Breakup Deformation Deformation Electric field Electric field isoAdvector isoAdvector Multiple emulsion Multiple emulsion
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| GB/T 7714 | Huang, Xin , Lu, Yijia , Li, Yilong et al. The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field [J]. | JOURNAL OF ELECTROSTATICS , 2024 , 129 . |
| MLA | Huang, Xin et al. "The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field" . | JOURNAL OF ELECTROSTATICS 129 (2024) . |
| APA | Huang, Xin , Lu, Yijia , Li, Yilong , Luo, Xiaoming , Teng, Lin , Li, Weidong et al. The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field . | JOURNAL OF ELECTROSTATICS , 2024 , 129 . |
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The evaporation characteristics of a sessile droplet under a direct current electric field were numerically investigated, and a numerical model was developed based on the arbitrary Lagrange-Euler method, combining the flow, heat transfer, vapour transport, and electrostatic equations. The simulations were validated to be in good agreement with previously reported experiments. The results demonstrate that the electric field can enhance the evaporation of the sessile droplet with different evaporative cooling numbers (initial electric field intensity E0 = 280 kV & sdot;m 1; 32.9% decrease in the evaporation time for water) by the following three methods: increasing the surface area of the droplet evaporation (2.6%) through the electric-field-induced deformation, improving the heat transfer efficiency between the droplet and substrate (droplet average temperature increases by 2.3 K) through the internal vortex, and by enhancing the shearing effect on the vapour layer (450.3% increase in vapour diffusion distance dc) through the external vortex. Additionally, the evaporation of a sessile water droplet undergoing thermocapillary convection is further enhanced under the electric field (E0 = 280 kV & sdot;m 1; 20.0% decrease in the evaporation time). As the inhomogeneous temperature distribution inside the droplet was eliminated by thermocapillary convection, the evaporation efficiency was dominated by the increased surface area of the droplet evaporation and the enhanced shearing effect on the vapour layer. These results will provide a better understanding of the electro-hydrodynamic enhanced droplet evaporation.
Keyword ：
ALE ALE Droplet deformation Droplet deformation Droplet evaporation Droplet evaporation Electric field Electric field Numerical simulation Numerical simulation
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| GB/T 7714 | Wang, Weifeng , Huang, Xin , Wang, Liangxu et al. Study on the mechanism of sessile droplets evaporation enhanced by the electric field [J]. | CHEMICAL ENGINEERING SCIENCE , 2024 , 288 . |
| MLA | Wang, Weifeng et al. "Study on the mechanism of sessile droplets evaporation enhanced by the electric field" . | CHEMICAL ENGINEERING SCIENCE 288 (2024) . |
| APA | Wang, Weifeng , Huang, Xin , Wang, Liangxu , Teng, Lin , Luo, Xiaoming , Li, Weidong et al. Study on the mechanism of sessile droplets evaporation enhanced by the electric field . | CHEMICAL ENGINEERING SCIENCE , 2024 , 288 . |
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Coffee rings formed by evaporation of analyte-containing droplets are widely observed in micropatterning, bioarrays, and trace detection. The coffee-ring effect caused by contact line pinning significantly affects the detection uniformity and sensitivity. Here, we propose a simple and operable method to effectively suppress coffee rings through controllable nanoparticles aggregation by superhydrophobicity-enabled dynamic evaporation. The gold nanoparticles (AuNPs) deposition footprint formed after dynamic evaporation on an integrated superhydrophobic surface was reduced by -3 orders of magnitude compared to that of non-interventional evaporation. Detailed experiments, numerical simulations, and theoretical studies have revealed that substrate wettability, temperature and droplet motion behaviors play significant roles in suppressing coffee-ring effect. More critically, based on the force mechanism of AuNPs at the interface/contact line, universal mathematical models and regime maps were established to classify the different deposition modes for AuNPs under different evaporation conditions by introducing dimensionless parameter G, revealing the enrichment mechanism of AuNPs in droplets under superhydrophobicity-enabled dynamic evaporation. The accuracy of the theoretical model and enrichment mechanism was demonstrated through the single-molecule detection of rhodamine 6G with excellent sensitivity (10-17 M, enhancement factor -1013) and perfect uniformity (relative standard deviation -5.57 %), which provides a valuable guide for research and applications of nanoparticle aggregation.
Keyword ：
Coffee-ring effect Coffee-ring effect Enrichment mechanism Enrichment mechanism Evaporation mode Evaporation mode Nanoparticles Nanoparticles Superhydrophobicity Superhydrophobicity
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| GB/T 7714 | Han, Yunrui , Fan, Guangpeng , Han, Yingkuan et al. Suppression of coffee rings by controllable nanoparticle enrichment through superhydrophobicity-enabled dynamic evaporation [J]. | JOURNAL OF COLLOID AND INTERFACE SCIENCE , 2024 , 673 : 735-745 . |
| MLA | Han, Yunrui et al. "Suppression of coffee rings by controllable nanoparticle enrichment through superhydrophobicity-enabled dynamic evaporation" . | JOURNAL OF COLLOID AND INTERFACE SCIENCE 673 (2024) : 735-745 . |
| APA | Han, Yunrui , Fan, Guangpeng , Han, Yingkuan , Huang, Xin , Wang, Weifeng , Luo, Xiaoming et al. Suppression of coffee rings by controllable nanoparticle enrichment through superhydrophobicity-enabled dynamic evaporation . | JOURNAL OF COLLOID AND INTERFACE SCIENCE , 2024 , 673 , 735-745 . |
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Excessive electric field strength causes the droplets to contact but not coalesce, severely deteriorating the oil-water separation efficiency. The investigation of the non-coalescence of nonidentical droplets in oil under a DC electric field is conducted using high-speed photography. The effects of droplet volume ratio and interfacial tension ratio on the characteristics and critical parameters for droplet non-coalescence are systematically explored. The results show the critical electrocapillary number for the non-coalescence of nonidentical droplets and critical contact cone angle decreases as the volume sum increases or the interfacial tension ratio decreases, which is related to the competition between the resultant electric field force and the interfacial tension force. These results contribute to optimizing the operating parameters of the electric coalescer and improving the oil-water separation efficiency.
Keyword ：
capillary pressure difference capillary pressure difference droplet droplet electric field electric field liquid bridge liquid bridge nonidentical non-coalescence nonidentical non-coalescence
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| GB/T 7714 | Huang, Xin , Chen, Mindan , Huang, Yunyun et al. Non-coalescence of nonidentical droplets in oil under a DC electric field [J]. | AICHE JOURNAL , 2024 , 70 (8) . |
| MLA | Huang, Xin et al. "Non-coalescence of nonidentical droplets in oil under a DC electric field" . | AICHE JOURNAL 70 . 8 (2024) . |
| APA | Huang, Xin , Chen, Mindan , Huang, Yunyun , Luo, Xiaoming , Teng, Lin , Xiao, Longqiang et al. Non-coalescence of nonidentical droplets in oil under a DC electric field . | AICHE JOURNAL , 2024 , 70 (8) . |
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The mass transfer characteristics during ammonia absorption into a sessile water droplet in a small controlledatmosphere wind tunnel were investigated using particle tracking velocimetry (PTV) with polystyrene microspheres. The results showed that the flow field inside the droplet transformed from Marangoni convection to Rayleigh convection in the absence of gas flow. As the gas velocity increased, the drag force-induced circulation inhibited the Marangoni convection in the initial stage of the mass transfer process and Rayleigh convection in the advanced stage. However, the suppressed Marangoni convection cells recurred at high initial ammonia concentrations. Compared with the initial ammonia concentration in the wind tunnel and droplet size, the gas velocity significantly increased the gas-phase mass transfer coefficient. Furthermore, a calculation model for ammonia absorption by a moving droplet was derived based on the Colburn analogy and the two-film theory. The gas-phase mass transfer coefficients calculated using the model coincided with the experimental results. These results will help the design of water curtains.
Keyword ：
Ammonia absorption Ammonia absorption Mass transfer coefficient Mass transfer coefficient Mathematical model Mathematical model Particle tracking velocimetry Particle tracking velocimetry Rayleigh -Be nard -Marangoni convection Rayleigh -Be nard -Marangoni convection
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| GB/T 7714 | Bai, Jinbao , Wang, Weifeng , Qiu, Guopan et al. Ammonia absorption by water droplet in a small controlled atmosphere wind tunnel [J]. | CHEMICAL ENGINEERING SCIENCE , 2024 , 292 . |
| MLA | Bai, Jinbao et al. "Ammonia absorption by water droplet in a small controlled atmosphere wind tunnel" . | CHEMICAL ENGINEERING SCIENCE 292 (2024) . |
| APA | Bai, Jinbao , Wang, Weifeng , Qiu, Guopan , Huang, Xin , Yin, Pengbo , Li, Zhenchao et al. Ammonia absorption by water droplet in a small controlled atmosphere wind tunnel . | CHEMICAL ENGINEERING SCIENCE , 2024 , 292 . |
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采用成品油管道顺序输送甲醇不仅可以拓展甲醇运输方式、降低运输成本,还能够提升管道运力、缓解现有成品油管道低输量难题,但目前成品油管道顺序输送甲醇工艺相关研究鲜有报道,技术的推广和应用受限.针对顺序输送过程中的混油问题,结合ALE(Arbitrary Lagrangian-Eulerian)方法、流体控制方程以及物质传递方程,建立了甲醇和汽油顺序输送混油模型,分析了输送次序和管道流速对甲醇和汽油顺序输送过程中混油长度和混油浓度演化的影响规律.研究表明,该模型模拟的混油长度略短于VOF(流体体积)方法,在实际顺序输送过程中选择甲醇前行汽油后行的输送次序,能够有效缩短混油长度.研究结论可为成品油管道顺序输送甲醇工艺提供理论指导.
Keyword ：
ALE方法 ALE方法 数值模拟 数值模拟 混油扩散 混油扩散 甲醇输送 甲醇输送
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| GB/T 7714 | 黄鑫 , 施鸿翔 , 王良旭 et al. 水平管道中甲醇和汽油顺序输送过程混油规律研究 [J]. | 油气与新能源 , 2024 , 36 (4) : 57-66 . |
| MLA | 黄鑫 et al. "水平管道中甲醇和汽油顺序输送过程混油规律研究" . | 油气与新能源 36 . 4 (2024) : 57-66 . |
| APA | 黄鑫 , 施鸿翔 , 王良旭 , 李卫东 , 李加庆 , 尹鹏博 et al. 水平管道中甲醇和汽油顺序输送过程混油规律研究 . | 油气与新能源 , 2024 , 36 (4) , 57-66 . |
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管道运输是液氨最为经济的长距离输送方式,液氨管道输送标准化是保障管道规范建设、运营和维护的重要环节,而国内现行标准中有关液氨管道输送技术的信息较少.为此,系统分析了国内外液氨管道建设现状和现行液氨管道输送技术标准,重点探讨了相关标准中输送工艺、线路、管道(管道附件、支撑件)设计和输氨站等方面规定的异同点,并提出了适用性建议.对于液氨管道质量要求、介质流速、管材选择、腐蚀裕量和站场防护设施等方面可分别参照GB/T 536、GB 50253、SY/T 7629、SH/T 3074和美国ASMEB31.4等标准执行.对于液氨管道的埋地管道净距、地区等级划分、截断阀室最大间距、站场防火间距和站场安全泄放等方面可参考规定相对严格的油气管道相关标准法规(GB51142、GB50253、GB50160和美国29CFR1910.111等)执行.考虑到液氨的毒性、扩散特征和防控措施与油气存在一定差异,建议开展液氨泄漏扩散和安全泄放风险评估及预测的研究,对适用于液氨场景的间距取值及规定开展进一步论证.
Keyword ：
标准化发展 标准化发展 标准对比 标准对比 液氨 液氨 管道输送 管道输送
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| GB/T 7714 | 尹鹏博 , 曾培琰 , 滕霖 et al. 国内外液氨管道输送技术标准对比分析 [J]. | 低碳化学与化工 , 2024 , 49 (11) : 81-89 . |
| MLA | 尹鹏博 et al. "国内外液氨管道输送技术标准对比分析" . | 低碳化学与化工 49 . 11 (2024) : 81-89 . |
| APA | 尹鹏博 , 曾培琰 , 滕霖 , 李加庆 , 李卫东 , 黄鑫 et al. 国内外液氨管道输送技术标准对比分析 . | 低碳化学与化工 , 2024 , 49 (11) , 81-89 . |
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氨作为零碳绿色能源载体,可以有效替代化石燃料,实现节能减排.液氨管道是目前最为高效安全的氨能长距离输送方式之一,其经济性评价是提高管输经济效益和优化管输参数的重要依据.基于国内外液氨管道输送工程,建立长距离液氨管道系统输送技术模型和经济性评价模型,对不同管道直径、管道输量、入口温度和输送距离下的液氨管道单位运输成本和年化运输成本构成进行对比分析.结果表明:流速恒定时,随管径增加,单位运输成本先快速下降后逐渐平缓,而年化运输成本变化与之相反,其中管道建设和年运行维护费用起主导作用;流量恒定时,单位运输成本和年化运输成本均随管径增大呈线性增加;随管道输量增加,单位运输成本显著降低,年化运输成本呈线性增加,其中泵建设和运营维护费用显著增加;随着入口温度升高,单位运输成本和年化运输成本逐渐增加且增幅较小;随输送距离增加,单位运输成本不断下降且趋势逐渐平缓;大管径、大输量下的管输经济效益更高.
Keyword ：
敏感性 敏感性 液氨 液氨 经济评价 经济评价 运输成本 运输成本 长输管道 长输管道
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| GB/T 7714 | 尹鹏博 , 李逸龙 , 滕霖 et al. 液氨长输管道技术经济性分析 [J]. | 油气与新能源 , 2024 , 36 (6) : 75-83 . |
| MLA | 尹鹏博 et al. "液氨长输管道技术经济性分析" . | 油气与新能源 36 . 6 (2024) : 75-83 . |
| APA | 尹鹏博 , 李逸龙 , 滕霖 , 黄鑫 , 李臻超 , 罗宇 et al. 液氨长输管道技术经济性分析 . | 油气与新能源 , 2024 , 36 (6) , 75-83 . |
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