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	1. Numerical analysis of Flow-structure interactions with the gravity effect for Rim-generator turbines
	CHEN Funan,CHEN Qifan,WANG Zhengwei
	Energy Science and Technology 17 May 2017
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	Abstract:For a Rim-generator turbine with a shaft in transversal arrangement, the operating head is low, and the runner diameter is large. Therefore, the fluid field in a runner would be influenced by the gravity. In this paper, the gravity effect on the fluid flow and the flow-induced stress of the runner are investigated by numerical simulations. The full-body channel including the runner, the inlet pipe and the outlet pipe has been established. Firstly, the gravity influence on the fluid flow through the channel is predicted for this turbine. Secondly, with one-way fluid-structure interaction (FSI) method, the finite element analysis of stresses on the blades is performed. The stress distribution on other parts of the turbine is also calculated in this part. Results show that the pressure field in the runner is influenced by the gravity, and the maximum stresses are located at the transition between the blade and the shroud. The maximum stress on the structure is far smaller than the yield stress.
	TO cite this article:CHEN Funan,CHEN Qifan,WANG Zhengwei. Numerical analysis of Flow-structure interactions with the gravity effect for Rim-generator turbines[OL].[17 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4730359


	2. Straight flow turbine runner hole-shape rim seal design based on CFD
	CHEN Qifan,CHEN Funan,WANG Zhengwei
	Energy Science and Technology 11 May 2017
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	Abstract:Since its advantages of the straight passageway and large mass-flow ratio, the straight flow turbine has become an important type in the development of low-head hydraulic resource. However, due to the special configuration of its runner, that the runner rim rotating follows the blades, high demands is required on its runner rim seal performance. Rim seal defects restricted the application and development of the straight flow turbine for many years. By redesigning a hole-shape rim seal using the commercial CFD software, this paper discussing the influence of different hole-shape parameters on the rim seal performance by an orthogonal experiment. Through the analysis, the hole-shape rim seal reduce 20% leakage compared with using the plate clearance seal. ?????
	TO cite this article:CHEN Qifan,CHEN Funan,WANG Zhengwei. Straight flow turbine runner hole-shape rim seal design based on CFD[OL].[11 May 2017] http://en.paper.edu.cn/en_releasepaper/content/4730434

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	3. Modeling the characterization of the plus fractions for different petroleum fluids with an improved six-coefficient splitting method
	LI Changjun,PENG Yang
	Energy Science and Technology 23 May 2016
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	Abstract:Petroleum fluids such as the gas condensate and crude oil system often contain large concentrations of high molecular constituents. When determining the physicochemical properties and phase behavior of petroleum fluids by equations of state, the hydrocarbon heavy fractions should be properly characterized. Although advanced gas chromatographs can be used to analyze the fluid composition, the simple structure molar distribution models are still convenient to characterize the heavy hydrocarbon fractions so that time and money will be saved. To accurately split the plus fraction into a series of single carbon numbers (SCN), generating the mole fraction and the respective molecular weight, an improved six-coefficient splitting model is presented in this study. The model is based on the relationships between the six-coefficient molar distribution function, experimental mole fraction, average molecular weight and SCN data acquired from the literature. The presented model was validated by using the experimental extended fluid component of 20 different petroleum fluids which cover gas condensates and crude oils. The comparison results of the model and four other splitting approaches as Katz method, Pedersen et al. method, Ahmed et al. method and Hosein et al. method, indicate that the improved method is more practical and appropriate for extending different types of petroleum fluids.
	TO cite this article:LI Changjun,PENG Yang. Modeling the characterization of the plus fractions for different petroleum fluids with an improved six-coefficient splitting method[OL].[23 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4690689


	4. Predicting the compressibility factor for gas condensate samples using a thermodynamic model with a three-parameter cubic equation of state
	LI Changjun,PENG Yang
	Energy Science and Technology 23 May 2016
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	Abstract:The gas compressibility factor as an essential thermodynamic parameter is often used to analyze PVT phase behavior in natural gas industry. To accurately predicate it for different gas condensate samples, a data base containing 916 data sets covering a wide range of experimental conditions is employed to establish and test the thermodynamic prediction model based on a three-parameter cubic equation of sate (EoS). The presented model which based on a modified PT EoS combines with Elliot-Daubert binary interaction coefficients correlation, two-parameter plus fraction splitting model and Hosseinifar-Jamshidi characterization method outperforms conventional empirical correlations with three mixing rules. Statistical error analysis shows that it is superior to ten empirical correlations with average absolute relative errors of 1.45% and coefficient of determination of 0.989. The proposed thermodymic model is efficient and practical for predicting the compressibility factor for various gas condensates.
	TO cite this article:LI Changjun,PENG Yang. Predicting the compressibility factor for gas condensate samples using a thermodynamic model with a three-parameter cubic equation of state[OL].[23 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4690165


	5. Preparation of Coal Tar Pitch-based Mesoporous Activated Carbon and its Adsorption of Benzothiophene and Dibenzothiophene
	Jianghua Qiu,Guanghui Wang,Yuncheng Bao
	Energy Science and Technology 17 May 2016
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	Abstract:Mesoporous activated carbons (MCs) were prepared from coal tar pitch using nanosized silica as the hard template. Effects of imprinting temperature, mixing ratio of pitch/silica and carbonization temperature on the textural structure and the adsorption of benzothiophene (BT) and dibenzothiophene (DBT) in the model fuel oil were studied. The pore structure and surface topography of the MC samples were characterized by N2 adsorption and SEM. The results show that the main pore size distribution of MCs is close to the size of the template used. With the decrease of mpitch/msilica ratio from 3:1 to 1:4, the specific surface area increased obviously, whereas the mesopore portion decreased. When the imprinting temperature is 320 ℃, mpitch/msilica ratio is 1:3 and carbonized temperature is 800 ℃, a best MC with the specific surface area of 262 m2/g and the mesoporous rate of 72.1% is produced. The mesoporous structure of the activated carbons is advantageous for the adsorption of BT and DBT, and the increase of the mesopore portion is more favorable for the adsorption of DBT.
	TO cite this article:Jianghua Qiu,Guanghui Wang,Yuncheng Bao. Preparation of Coal Tar Pitch-based Mesoporous Activated Carbon and its Adsorption of Benzothiophene and Dibenzothiophene[OL].[17 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4689951


	6. Electrodeposition of Silicon from Molten Salts on Liquid Metal Electrodes
	Yiwei Tang,Ming Jia,Yun Cheng,Zhongliang Tian,Yanqing Lai,Yexiang Liu
	Energy Science and Technology 12 May 2016
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	Abstract:A fundamental electrochemical study of Si ions electrodeposition and physical diffusion behavior in Na3AlF6-LiF melts and electrolysis using Al and Cu-Si liquid cathodes was conducted under 950℃. The results indicates that the depolarization of silicon deposition on liquid cathode and Reduction potential of Si is higher than solid electrodes. Besides, the concentration Si ions in melt have an extremely influence on electrodeposition process, co-deposition of Al and Si is possible when Si ions are insufficient in the molten salt. The change of open circuit voltage on liquid electrodes illustrate the diffusion rate of Si ions in Cu-Si alloy is quicker than it in Al melt. The basic physical data such as activity coefficient of Si in alloy under different concentration can be accessed by evaluate open circuit voltage, which build a bridge between electrochemical study result and physical properties of materials. Galvanostatic electrolysis showed that liquid cathodes are appropriate to collect the deposited solid silicon and the highest collection efficiency is almost 85%.
	TO cite this article:Yiwei Tang,Ming Jia,Yun Cheng, et al. Electrodeposition of Silicon from Molten Salts on Liquid Metal Electrodes[OL].[12 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4689882


	7. The effect of the pH value of the anodic solution on the transmembrane transport of oxygen in microbial fuel cells
	HUANG Dong,YAO Sen,SONG Bingye,HE Yaling
	Energy Science and Technology 10 May 2016
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	Abstract:In this paper, a molecular dynamic model is established to describe the transfer of oxygen in the cathode chamber through the Nafion membrane to the anode chamber of MFCs. The effect of the pH values of the anodic solution on the diffusion process is studied and the diffusion coefficient are calculated either. The law of oxygen transmembrane transport predicted by simulations is validated by experiments. The results of molecular dynamic simulations show that the diffusion coefficient of oxygen molecules increases sharply with the decrease of the pH value of the MFCs anodic solution. It appears that the lower the pH value is, the more easily the oxygen diffuses into the anode chamber. This conclusion is coherent with experimental results. The diffusion coefficient of hydronium ions is almost unchanged after the rise at first with the decrease of the pH value and has the saturation because of the limitation of the Nafion membrane ion exchange capacity. The radial distribution function analysis shows that the main factors affecting the oxygen molecules transmembrane diffusion are the free volume and motion of Nafion side chains.
	TO cite this article:HUANG Dong,YAO Sen,SONG Bingye, et al. The effect of the pH value of the anodic solution on the transmembrane transport of oxygen in microbial fuel cells[OL].[10 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4687878


	8. Smoothing effect of the aggregated photovoltaics power output using mesoscale data: A comparative analysis in the Mediterranean and China
	YANG Peijin,GAO Zhiqiu,George Caralis
	Energy Science and Technology 04 March 2015
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	Abstract:A mesoscale atmospheric model is applied in the Mediterranean and China in order to analyse and understand the smoothing effect of the aggregated photovoltaics power output. Systematic application of a Mesoscale Weather Prediction Model for one year, in Mediterranean and China, provides simultaneous information of solar radiation in selected points. The hourly time-series data of solar radiation and the estimated energy output of photovoltaics are analysed to show the temporal and spatial variability of solar energy in different time and space scales. Distributed solar generation is today the most common type of decentralized energy production. The results of the current analysis could be useful for power system operators to improve the design and operational strategy of power system with large photovoltaics integration. The parallel analysis in China and Mediterranean and comparisons between sub-regions, show that there is a positive impact thanks to the integration of photovoltaics in wider geographical areas and this information should be definitely taken into consideration from system operators and policy makers towards large scale photovoltaics integration into a large power system.
	TO cite this article:YANG Peijin,GAO Zhiqiu,George Caralis. Smoothing effect of the aggregated photovoltaics power output using mesoscale data: A comparative analysis in the Mediterranean and China[OL].[ 4 March 2015] http://en.paper.edu.cn/en_releasepaper/content/4633117


	9. Theoretical mathematic wake model and its application in reducing energy assessment
	GE Litao,UCHIDA Takanori,OHYA Yuji
	Energy Science and Technology 21 October 2014
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	Abstract:Currently, most commercial wind power software are using mathematic wake model for the energy assessment and optimizing the layout of the wind farm. I proposed a new mathematics wake model theoretically based on Theorem of Momentum combined with Actuator Disk Model. This model can calculate the velocity profile of the cross section of the wake not only average results. Two special cases are considered. one is the velocity reduction more than 30% which makes the theorem of momentum invalid. The other is the case of the lateral wind turbine impact. The intermittency of wind power production is analyzed in the research and the new make model applications are highlight.
	TO cite this article:GE Litao,UCHIDA Takanori,OHYA Yuji. Theoretical mathematic wake model and its application in reducing energy assessment[OL].[21 October 2014] http://en.paper.edu.cn/en_releasepaper/content/4614133


	10. Numerical Simulation of Wake and Array of Double Wind Turbine
	YANG Rui,XIA Weiwei,ZHANG Shenglong,WANG Jiuxin,XU Shihai
	Energy Science and Technology 01 March 2014
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	Abstract:In order to use the wind resources reasonable and reduce the wake effects on wind turbine performance.The aerodynamic interaction between two turbines in both co-axial and stagger arrangement was simulated using the Fluent.Putting forward suggestions to the optimization of wind farm layout.The results show that downstream turbine makes the upstream diverging wake to be convergence when co-axial wind conditions, and the output of downstream turbine is affected by upstream wake when the spacing is less than 5D.The wake field become more diffused after pass the downstream turbine ,and the area of diverging wake become larger than the wake of upstream turbine mainly due to the increase of turbulence intensity. The greater fatigue load impact on the downstream turbine .Due to flow field were extruding by the wake effect of the reference turbine when stagger arrangement wind conditions,the interface of wake has a complex velocity field.
	TO cite this article:YANG Rui,XIA Weiwei,ZHANG Shenglong, et al. Numerical Simulation of Wake and Array of Double Wind Turbine[OL].[ 1 March 2014] http://en.paper.edu.cn/en_releasepaper/content/4587922

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