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石油钻井中旋冲钻井技术的应用

石化技术 2024年第8期31卷 86-88,262页

作者：胡大鹏中国石化国际石油工程有限公司北京100020

以石油钻井中旋冲钻井技术的应用为研究对象,从工程概况、施工前的准备和具体施工技术等方面展开研究。通过对气动旋转冲击钻井技术和液动旋转冲击钻井技术的介绍,探讨了其在石油钻井中的应用现状和发展趋势。最后,结合科威特西部油区... 详细信息

以石油钻井中旋冲钻井技术的应用为研究对象,从工程概况、施工前的准备和具体施工技术等方面展开研究。通过对气动旋转冲击钻井技术和液动旋转冲击钻井技术的介绍,探讨了其在石油钻井中的应用现状和发展趋势。最后,结合科威特西部油区实际案例进行分析,总结了旋冲钻井技术在石油钻井中的优势和挑战,为该领域的进一步研究和应用提供了参考。

关键词：石油钻井旋冲钻井钻探

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单重态氧发生器分离性能数值模拟

大连理工大学学报 2024年第3期64卷 275-281页

作者：伍凯轩许晓波盛荟霖胡大鹏大连理工大学精细化工国家重点实验室辽宁大连116024 中国科学院大连化学物理研究所化学激光实验室辽宁大连116023

为了解决单重态氧发生器气液分离效率不高的问题,设计了一种使用螺旋式叶片对雾化液滴高速离心的发生器.基于计算流体力学方法对反应区域分离性能进行数值模拟,使用Creo对发生器和流场进行三维建模,并在Fluent软件中使用多重参考系(MRF... 详细信息

为了解决单重态氧发生器气液分离效率不高的问题,设计了一种使用螺旋式叶片对雾化液滴高速离心的发生器.基于计算流体力学方法对反应区域分离性能进行数值模拟,使用Creo对发生器和流场进行三维建模,并在Fluent软件中使用多重参考系(MRF)模型和离散相模型(DPM)相结合的方法对模型进行数值模拟,在不同结构参数、操作参数以及物性参数下进行系统性仿真,得到不同参数下连续相的流场分布及离散相的运动颗粒特性曲线.研究表明该发生器在2000 r/min的转速下能够对20μm及以上粒径的液滴有90%以上的分离效率.

关键词：单重态氧分离器数值模拟分离性能

基于储能船舶的海岛群电-氢混合能量调度策略

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电网技术 2024年第8期48卷 3317-3328,I0090,I0091页

作者：陈笑云顾延勋胡大朋翁汉琍魏繁荣马云聪新能源微电网湖北省协同创新中心(三峡大学) 湖北省宜昌市443002 三峡大学电气与新能源学院湖北省宜昌市443002 广东电网有限责任公司珠海供电局广东省珠海市519000 强电磁工程与新技术国家重点实验室(华中科技大学) 湖北省武汉市430074

海岛/海上新能源的开发面临着电能送出难的问题。对于尚未通过海底电缆互联的海岛电网而言,富余新能源的制氢外送和电池外送模式各具优缺点。为结合2种外送模式的优点,提出了一种基于储能船舶的近海海岛群电-氢混合传输模式。首先,提出... 详细信息

海岛/海上新能源的开发面临着电能送出难的问题。对于尚未通过海底电缆互联的海岛电网而言,富余新能源的制氢外送和电池外送模式各具优缺点。为结合2种外送模式的优点,提出了一种基于储能船舶的近海海岛群电-氢混合传输模式。首先,提出了基于储能船舶的海岛群能量互联共享模式,以电池包和储氢罐为载体,实现能量的灵活转化和在岛屿之间的灵活转移;其次,构建了电能-氢能转换效率的数学分析模型,并在综合考虑电池损耗和制氢效率的基础上,探讨了富余新能源在制氢与电池存储之间的最优功率分配机制,以厘清在不同新能源出力场景下2种外送模式的优劣;然后,通过搭建氢能储运成本分析模型,研究了压强、体积等压缩储氢关键参数与经济成本的关系,并提出了相应的电-氢混合输送日运行调度优化模型;最后,基于珠海市某群岛实际地理数据开展仿真分析,结果验证了所提方法的可行性和有效性。

关键词：新能源外送电氢混合传输储能船舶近海海岛

Experimental and Numerical Research on Strengthening the Performance of Wave Rotor Equipment with Curved Passages

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Journal of Thermal Science 2023年第1期32卷 59-80页

作者： ZHAo Yiming LI Haoran hu dapeng Department of Chemical Machinery Dalian University of TechnologyDalian 116012China

The wave rotor technology is an energy exchanging approach that achieves efficient energy transfer between gases without using mechanical *** wave rotor technology has been successfully utilized in gas turbine cycle systems,gas expansion refrigeration and a variety of other industrial domains,yielding numerous researches and application *** structure of wave rotor passages inside which the energy exchange between gases is realized has an important impact on the equipment *** this study,based on gas wave ejection technology,the first application trials of an expansion wave rotor with curved passages were ***,the performance enhancing effect and mechanism of curved passages on the energy exchanging process were studied precisely by the combination of experimental and three-dimensional numerical simulation *** experimental results demonstrate that the curved passage rotor(CIR rotor)employed in this research has a maximum isentropic efficiency of 61.6%,and the CIR rotor achieves higher efficiency than the straight passage rotor(STR rotor)on all working conditions in this *** with the STR rotor,the maximum efficiency improving ratio of CIR rotor can exceed 14.2%at each experimental expansion ratio,and the maximum relative increments of ejection rate are more than 5%.In addition,the CIR rotor can also effectively increase the proportion of static pressure in total pressure of the medium-pressure gas,and reduce the device power *** three-dimensional numerical investigations revealed the principle of gas ejection in the wave rotors and explained why the CIR rotor performed *** to the numerical findings,the curved passages of the CIR rotor may effectively minimize various energy losses created in the processes of high-pressure gas incidence,exhausting flow in nozzle,and high-speed gas flow in the passages.

关键词： energy exchange wave rotor ejector curved passage experimental research

Numerical and Experimental Study on Contact Face and Shock Wave Motion in the Receiving Tube of Gas Wave Refrigerator

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Journal of Thermal Science 2006年第4期15卷 337-341页

作者： dapeng hu Shengtao CHEN hu LIU Zuzhi CHEN Che Zhu Institute of Chemical Engineering Dalian University of Technology Dalian Liaoning China

The contact face and shock wave motion in an open ends receiving tube of gas wave refrigerator are investigated numerically and experimentally. The results show that, velocity of the contact face rises rapidly as gas is injected into the receiving tube, and drops sharply after a steady propagation. However, velocity of the shock wave in the tube is almost linear. With increasing of inlet pressure, velocity of the shock wave and steady velocity of contact face also increase. In addition, time and distance of contact face propagation in the receiving tube become longer.

关键词： contact face shock wave receiving tube gas wave refrigerator

真实气体效应对气波波动和能量传递过程的影响

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过程工程学报 2024年第9期24卷 1036-1046页

作者：高凤周一卉刘志军胡大鹏黄兆锋大连理工大学化工学院辽宁大连116024

气波制冷机通常根据理想气体模型进行设计与制造。随着天然气藏的操作参数逐渐向高压力、高压比工况下发展,真实气体效应已不容忽视。以新疆塔里木盆地牙哈气田真实天然气藏为介质,选取多参数BWR方程,建立了高压比条件下双开口气体波制... 详细信息

气波制冷机通常根据理想气体模型进行设计与制造。随着天然气藏的操作参数逐渐向高压力、高压比工况下发展,真实气体效应已不容忽视。以新疆塔里木盆地牙哈气田真实天然气藏为介质,选取多参数BWR方程,建立了高压比条件下双开口气体波制冷机的二维计算模型,深入探讨了非连续边界条件下气波制冷机内真实气体效应对气波波动和能量传递过程的影响规律。数值计算结果表明,在不同工况下,理想甲烷和真实天然气的波系运动相似,但真实天然气的压缩波和膨胀波明显滞后于理想甲烷。真实天然气低温介质比理想甲烷更早完全排出,在低转速工况下两者之间的差异随着压比增加而逐渐增大,当压比为6时,低温端口的长度可以缩短56.5%。排出的真实天然气温度低于理想甲烷,因此真实天然气等熵膨胀制冷效率优于理想甲烷。本研究成果揭示了真实气体效应对气波运动和能量传递的影响,可为用于天然气地面工程的气波制冷机优化设计提供了支持。

关键词：真实气体效应气波制冷机波系运动制冷效率能量传递

Numerical and experimental study on the refrigeration performance of a variable-section gas wave oscillation tube

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Science China(Technological Sciences) 2023年第2期66卷 489-500页

作者： WANG HaiTao LIU XinYu FU ZhongMeng hu dapeng LIU PeiQi Frontier Science Center for Smart Materials Dalian University of TechnologyDalian 116024China

This paper introduces the refrigeration cycle process of the gas wave oscillation tube(GWOT).Aiming at the problem that the strong reverse compression waves generated during the refrigeration process affect the performance,this paper proposes a variable-section GWOT that weakens the reverse compression waves and a variable-section structure designed using a numerical *** showed that the variable-section structure could reduce the intensity of the incident shock wave by approximately 7%and the total entropy production in the refrigeration cycle by approximately 8%under the design ***,the variable-section structure can effectively weaken the strength of the reverse compression waves and improve the refrigeration efficiency by approximately 4%under the same working *** variable-section structure can also widen the highperformance working range of the *** experimental results reveal that the high-performance working range can be expanded by more than two times under the design *** research can guide the subsequent development of gas wave refrigeration technology and a reference for other wave rotor application technologies.

关键词： gas wave oscillation tube variable-section refrigeration pressure fluctuation entropy production rate wave rotor

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旋风洗涤除尘器压降及流体动力学特性

化学工程 2024年第8期52卷 60-65页

作者：王予新王亚彬周岩陈宇许晓飞胡大鹏中石油煤层气有限责任公司北京100028 中国石油工程建设有限公司北京100120 大连理工大学化工学院辽宁大连116024

旋风洗涤除尘器结构相对简单且除尘效率高,是对煤炭地下气化产出的粗煤气进行净化处理的可靠设备。通过室内实验和CFD数值模拟相结合的方法,研究旋风洗涤除尘器压降规律和相应的流体动力学特性。实验测量单气相和气液两相流动条件下旋... 详细信息

旋风洗涤除尘器结构相对简单且除尘效率高,是对煤炭地下气化产出的粗煤气进行净化处理的可靠设备。通过室内实验和CFD数值模拟相结合的方法,研究旋风洗涤除尘器压降规律和相应的流体动力学特性。实验测量单气相和气液两相流动条件下旋风洗涤除尘器的压降,考察气体流量、液气比(体积比)和喷淋位置对设备压降的影响规律,并基于验证的数值模型确定旋风洗涤除尘器内的流体动力学特性。结果表明:旋风洗涤除尘器压降随气流量增加而显著增加,且在当前的液气比以及改变喷淋位置对设备压降的影响较小。当前确定的设备结构可以有效实现旋风除尘和喷淋除尘,但除雾滴用起旋板上方的流场可以进一步优化,以便实现气流夹带液滴的有效去除。

关键词：旋风洗涤除尘器压降影响因素流体动力学特性

Numerical investigation on freeze-drying of aqueous material frozen with pre-built pores

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Chinese Journal of Chemical Engineering 2016年第1期24卷 116-125页

作者： Wei Wang dapeng hu Yanqiu Pan Guohua Chen Department of Chemical Machinery Dalian University of Technology Department of Chemical Engineering Dalian University of Technology Department of Chemical and Biomolecular Engineering Hong Kong University of Science and Technology

Freeze-drying of the initially porous frozen material with pre-built pores from liquid material was found experimentally to save drying time by over 30% with an initial saturation being 0.28 compared with the conventional operation with the initial saturation being 1, using mannitol as the solid material. In order to understand the mass and heat transfer phenomena of this novel process, a two-dimensional mathematical model of coupled mass and heat transfer was derived with reference to the cylindrical coordinate system. Three adsorption–desorption equilibrium relationships between the vapour pressure and saturation value namely, power-law, Redhead's style and Kelvin's style equation, were tested. Kelvin's style in exponential form of adsorption equilibrium relation gave an excellent agreement between the model prediction and experimental measurement when the equation parameter, γ, of 5000 was applied. Analyses of temperature and ice saturation profiles show that additional heat needs to be supplied to increase the sample temperature in order to promote the desorption process. Simulation also shows that there is a threshold initial porosity after which the drying time decreased with the increase in the initial porosity. Enhanced freeze-drying is expected to be achieved by simultaneously enhancing mass and heat transfer of the process.

关键词： Adsorption Desorption Drying time Mass transfer Porous material Sublimation