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6th World Congress in Industrial Process Tomography

作者： Bai, Bofeng He, Denghui Xu, Yong Yang, Canghai Li, Li State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an710049 China Oil and Gas Technology Research Institute Changqing Oilfield Company of CNP Xi’an710021 China National Engineering Laboratory for Exploration and Development of Low-permeability oil and gas Field CNPC Beijing100007 China

ISBN: (纸本)9780853163220

An online method for measurement of water cut in the crude oil slug flow in vertical pipes is presented. The water cut is obtained from the water film length, which is measured by a double-tube capacitance probe sensor, on the surface-insulated tube. The double-tube capacitance probe sensor consists of two stainless steel tubes, one tube is covered with an insulating film and the other is not. There is a heating wire in each tube, which provides a certain amount of heat to prevent the formation of waxes on the surface of the tube. The output of water cut variations is in the form of capacitance signal, which is independent of water salinity and electrical properties of the liquid. The water film length, capacitance and water cut are linearly proportional to each other. The field experiments indicate that the measurements are affected by both the natural gas entrained in the liquid and the flow patterns. A comparison with manual sampling measurement suggests that the mean water cut obtained by the sensor is lower than that of manual sampling value in the slug flow and the relative deviation is 1..58%. The measured values are revised according to the water holdup of the slug flow, and the relative deviation is reduced to 8.04% after revising. © 201., International Society for Industrial Process Tomography. All rights reserved.

关键词： Crude oil

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Modelling of water transport in PEM fuel cell

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Kung Cheng Je Wu Li Hsueh Pao/Journal of engineering Thermophysics 2010年第9期31卷 1504-1507页

作者： Xu, Cheng-Jie Zhang, Guang-Sheng Liu, Hong-Tan Guo, Lie-Jin State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China Dept. of Mechanical and Aerospace Engineering University of Miami Coral Gables FL 33124 United States

A mixed-domain, two-phase flow, non-isothermal model is developed to study the water transport phenomena, which has significant effects on the performance of PEM fuel cells. Modelling results show that: the total water concentration is decreasing along the channel in anode, while it is increasing in cathode, flooding is most likely to occur at the end of cathode flow channel;liquid water in cathode GDL presents opposite distribution at high current density and low current density, the saturation of liquid water is decreasing from inner side to outer side across the GDL at low current density while it is increasing at high current density.

关键词： Two phase flow

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Hydrogen Production by CMC Gasification in Supercritical Water

Hydrogen Production by CMC Gasification in Supercritical Wat...

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IEEE PES Asia-Pacific power and Energy {1. Conference (APPEEC)

作者： Xiaohong Hao Liejin Guo Ximin Zhang School of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China

ISBN: (纸本)9781424448128;9781424448135

Hydrogen production by biomass supercritical water gasification is about to develop in the future because the process is closed and clean with high gasification efficiency in addition. Low concentration sodium carboxymethylcellulose (CMC) (2-3% mass fraction) can be mixed with particulate biomass and water to form a uniform and stable viscous paste which can be pumped to the continuous high-pressure reactor. In this paper, the supercritical water gasification of CMC was investigated in the tube flow apparatus to produce gas products consisting essentially of H 2 , CO, CH 4 and CO 2 .

关键词： Hydrogen Production Inductors Biomass Temperature Feeds Resistance heating Regulators Cooling Atmospheric measurements

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power system low frequency oscillation monitoring and analysis based on multi-signal online identification

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Science China(Technological Sciences) 2010年第11期53卷 2589-2596页

作者： YUAN Ye1.2,SUN YuanZhang2,CHENG Lin2,CHEN Gang2 & WANG Peng3 1.state Nuclear Electric {1. Planning Design and Research Institute,Beijing 1.0032,China 2 state key laboratory of {1. Systems,Deptment of Electrical engineering,Tsinghua University,Beijing 1.0084,China 3 EEE School,Nanyang Technological University,Singapore 1. State Nuclear Electric Power Planning Design and Research Institute Beijing 100032 China2. State Key Laboratory of Power Systems Deptment of Electrical Engineering Tsinghua University Beijing 100084 China3. EEE School Nanyang Technological University Singapore Singapore

The advance in the wide-area measurement system (WAMS) is driving the power system to the trend of wide-area monitoring and *** Prony method is usually used for low frequency oscillation online ***,the identified amplitude and phase information is not sufficiently *** this paper,the amplitude is adopted to detect the occurrence of the oscillation and to obtain the mode observability of the *** phase is adopted to identify the oscillation generator grouping and to obtain the mode *** time varying characteristics of low frequency oscillations are *** behaviors and the characters of low frequency oscillations are displayed by dynamic visual *** on the "1..9" low frequency oscillation of the Guizhou power Grid substantiate the feasibility and the validation of the proposed methods.

关键词： wide area measurement system (WAMS) low frequency oscillation Prony algorithm mode observability

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Photocatalytic desulfurization of gasoline by TiO2 coupling with ultrasonic

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Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology 2010年第4期38卷 428-433页

作者： Chen, Song-Xuan Zhao, Jing-Lian Su, Ci State Key Laboratory of Multiphase Flow in Power Engineering Department of Environmental Engineering Xi'an Jiaotong University Xi'an 710049 China

The photocatalytic oxidation of dibenzothiophen (DBT) in octance (as solvent) was conducted using O2 in air as the oxidant, TiO2 prepared by sol-gelatin method as the photocatalyst and coupling with ultrasonic. The effect of light distance, photocatalyst amount, reaction time, DBT initial concentration and ultasonic power on the removal of DBT were investigated deeply. The results show that the degradation rate of DBT increases by 1.% by using ultrasonic. Under the conditions of TiO2 dosage of 2 g/L, air {1. rate of 800 mL/min, distance of UV light of 20 cm, initial concentration of DBT of 600 mg/L, reaction time of 1.0 min, ultrasound power of 500 W, the degradation rate of DBT can reach up to 72.6%.

关键词： Ultrasonics

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Effect of Noble Metal in CdS/M/TiO ₂ for Photocatalytic Degradation of Methylene Blue under Visible Light

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International Journal of Green Nanotechnology: Materials Science and engineering 2010年第2期1卷 M94-M104页

作者： Shen, Shaohua Guo, Liejin Chen, Xiaobo Ren, Feng Kronawitter, Coleman X. Mao, Samuel S. State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an Shaanxi 710049 China Lawrence Berkeley National Laboratory University of California at Berkeley Berkeley CA 94720 United States

The CdS/M/TiO 2 (M = Ag, Ru, Au, Pd, and Pt) three-component nanojunction systems were constructed using a two-step photodeposition method, and evaluated for their photocatalytic activities through the degradation of ... 详细信息

The CdS/M/TiO ₂ (M = Ag, Ru, Au, Pd, and Pt) three-component nanojunction systems were constructed using a two-step photodeposition method, and evaluated for their photocatalytic activities through the degradation of methylene blue in aqueous solution under visible light irradiation. The authors found that the photocatalytic activity of CdS/M/TiO ₂ (M=Ag, Ru, Au, Pd, Pt) three-component nanojunctions was superior to that of CdS/TiO ₂ two-component system. Moreover, the photocatalytic activity of the three-component nanojunction system was found to be dependent significantly on the type of the noble metals. The results can be explained by the influence of charge transfer on the basis of the work functions of different noble metals. © 201. Copyright Taylor and Francis Group, LLC.

关键词： CdS/M/TiO 2 heterojunction noble metal photocatalysis Z-scheme

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Experimental study on pressure and temperature distributions for low mass flux steam jet in subcooled water

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Science China(Technological Sciences) 2009年第6期52卷 1493-1501页

作者： JunJie Yan XinZhuang Wu DaoTong Chong State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University Xi’an 710049 China

A low mass flux steam jet in subcooled water was experimentally *** transition of flow pattern from stable jet to condensation oscillation was observed at relatively high water *** axial total pressures,the axial and radial temperature distributions were measured in the jet *** results indicated that the pressure and temperature distributions were mainly influenced by the water *** correlations corrected with water temperature were given to predict the dimen-sionless axial pressure peak distance and axial temperature distributions in the jet region,the results showed a good agreement between the predictions and ***,the self-similarity property of the radial temperature was obtained,which agreed well with Gauss *** present work,all the dimensionless properties were mainly dependent on the water temperature but weakly on the nozzle size under a certain steam mass flux.

关键词： dimensionless self-similarity steam jet condensation temperature distribution total pressure

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Extension of the pressure correction method to zero-Mach number compressible flows

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Science China(Technological Sciences) 2009年第6期52卷 1583-1595页

作者： HE YaLing HUANG Jing TAO YuBing TAO WenQuan State Key Laboratory of Multiphase Flow in Power Engineering School of Energy&Power EngineeringXi’an Jiaotong UniversityXi’an 710049China

In the present paper,the classical pressure correction method was extended into low Mach number compressible flow regime by integrating equation of {1. into SIMPLE *** self-developed code based on this algorithm was applied to predicting the lid-driven cavity flow and shock tube prob-lems,and the results showed good agreement with benchmark solutions and the Mach number can reach the magnitude of as low as *** attenuation of sound waves in viscous medium was then *** results agree well with the analytical solutions given by theoretical *** demonstrated that the present method could also be implemented in acoustics field simulation,which is crucial for thermoacoustic simulation.

关键词： thermoacoustic engine pressure correction method low Mach number compressible flow

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The 6th International Symposium on multiphase {1., Heat Mass Transfer and Energy Conversion (ISMF2009)

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International Journal of Hydrogen Energy 2010年第13期35卷 7027-7027页

作者： Liejin Guo State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University China

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Numerical simulation on forced convection heat transfer in porous media using Gibson‐Ashby constitutive model

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AIP Conference Proceedings 2010年第1期1207卷

作者： J. X. Wang P. Y. Jia Y. S. Wang L. Jiang State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University China

In this article, using Gibson‐Ashby constitutive model, we suggest a new method for numerical investigation of forced convection heat transfer in porous foam metal, and try to consolidate the study for mechanical property and that for thermal characteristic. By available experimental data, we simulated to two cases, namely as the transfer in porous media for diameter is 0.6 mm and porosity is 0.402, and for diameter is 1.6 mm and porosity is 0.462. The result, from our constitutive model for single forced convection heat transfer, corresponds well with the experimental data. As for pressure drop prediction in porous is in good agreement with experiment, and the error is only 5% to 1.%, but for transfer is less accurate, the error is about 20%, which is acceptable in practice. So it is done that constitutive model is used to simulate the transfer property.

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