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ignition characteristics 2

numerical simulation 2

pulverized coal 2

temperature field 2

tiny-oil ignition burner 2

CO2 sequestration 1

Cocamide Diethanolamide 1

Combustion 1

Continuous-time scheduling model 1

Differential power processing (DPP) 1

Distributed power converters 1

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Maximal ratio combining (MRC) 1

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Influence of nozzle height to width ratio on ignition and NO

Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 431-448 doi: 10.1007/s11708-021-0726-3

Abstract: improve the ignition behavior and to reduce the high NO emissions of blended pulverized fuels (PF) of semicoke(SC), large-scale experiments were conducted in a 300 kW fired furnace at various nozzle settings, i.eregulating the nozzle / conditions sharply reduces NO emissions and improves the combustion efficiency of SC

Keywords： rectangular jet burner     nozzle height to width ratio     ignition characteristics     pyrolyzed semicoke (SC)and bituminous blend     NOx formation    

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Effects of pyrolyzed semi-char blend ratio on coal combustion and pollution emission in a 0.35 MW pulverized

Yonghong YAN, Liutao SUN, Zhengkang PENG, Hongliang QI, Li LIU, Rui SUN

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 78-90 doi: 10.1007/s11708-020-0678-z

Abstract: Shenmu pyrolyzed semi-char (SC), i.e., residuals of the coal pyrolysis chemical processing, and Shenhuabituminous coal (SB) were investigated in a 0.35 MW pilot-scale pulverized coal-fired furnace.that the standoff distance of ignition changes monotonically from 132 to 384 mm with the increase in pyrolyzedand highest for the 100% SC.So, an SC blend ratio of no more than 45% can be suitable for the burning of semi-char.

Keywords： pulverized-coal combustion     pyrolyzed semi-char     ignition characteristics     pollution emission     char burnout     blend ratio    

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Modeling of unconfined compressive strength of soil-RAP blend stabilized with Portland cement using multivariate

Ali Reza GHANIZADEH, Morteza RAHROVAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 787-799 doi: 10.1007/s11709-019-0516-8

Abstract: to develop a mathematical model for predicting the unconfined compressive strength (UCS) of soil-RAP blendThe results demonstrate that MARS has a great ability for prediction of the UCS in case of soil-RAP blend

Keywords： full-depth reclamation     soil-reclaimed asphalt pavement blend     Portland cement     unconfined compressive strength    

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Influence of soft rock-fill material as dam embankment with central bituminous concrete membrane

Peter TSCHERNUTTER

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 63-70 doi: 10.1007/s11709-010-0016-3

Abstract: This paper demonstrates the difficulties in determining the relevant material parameters for a valuation of the deformation behavior of the up- and downstream dam shell by means of an embankment dam of medium height. Laboratory as well as field tests on solid rock-fill material were performed before the beginning of construction. During the construction the properties of the available rock-fill changed from solid to soft materials. This gave rise to the necessity of adjusting the dam design of the downstream dam shoulder. Several times higher dam settlements as well as significant differential settlements between the up- and downstream dam shell were observed during construction and operation. Apart from this situation, the dam has been operated for nearly 20 years and the behavior of the water barrier has been very good.

Keywords： embankment dam     bituminous concrete membrane     rock-fill material properties     deformation behavior    

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Effect of temperature on Lu’an bituminous char structure evolution in pyrolysis and combustion

Yandi ZHANG, Yinhe LIU, Xiaoli DUAN, Yao ZHOU, Xiaoqian LIU, Shijin XU

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 14-25 doi: 10.1007/s11708-020-0805-x

Abstract: Lu’an bituminous char and ash samples were prepared at the N and air atmospheres respectively across

Keywords： bituminous char     pyrolysis     ash     structure evolution     reactivity    

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utilization of coal resources: The polygeneration system of a combination of the gasified coal gas and the pyrolyzed

Kechang XIE, Fan LI

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 383-384 doi: 10.1007/s11705-010-0526-5

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A study on quality evaluation for bituminous mixture using X-ray CT

Satoshi TANIGUCHI, Keiichiro OGAWA, Jun OTANI, Itaru NISHIZAKI

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 89-101 doi: 10.1007/s11709-013-0197-7

Abstract: The objective of this paper is to propose a new quality evaluation method for asphalt concrete mixture using X-ray CT scanner. To achieve this aim, asphalt mixtures should be subjected to the X-ray CT scanning and its characteristics should be clarified. The approach employed in this study was as follows: 1) Coarse aggregate, fine aggregate, filler and bitumen were prepared; 2) dense-graded, coarse-graded and porous asphalt mixtures were made; 3) materials and mixtures were subjected to the X-ray CT scanning; 4) frequency of CT-value, threshold value, average slice CT-value, average segment CT-value were computed. In the material examination, CT-value of aggregate becomes smaller in the order of coarse aggregate, fine aggregate and filler and CT image of bitumen was nearly homogeneous. In the mixture examination, histograms of CT-value and four segmentation images made from CT images expressed the material and mixture characterization such as particle size and the difference in bitumen content and mixture type visibly and the bitumen content varies with the threshold values. In addition, the average segment CT-value without threshold value by dividing the fine aggregate from the coarse aggregate and average CT-value of the coarse aggregate, especially is highly correlated with average CT-value of the bitumen.

Keywords： asphalt concrete mixture     aggregate     bitumen     bitumen content     quality evaluation     X-ray CT    

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Investigation of effects of Cocamide Diethanolamide chemical on physical and rheological properties of bituminous

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 99-116 doi: 10.1007/s11709-021-0799-4

Abstract: In this study, bituminous binder was modified with Cocamide Diethanolamide chemical, a non-ionic surfactantIn addition, Cocamide Diethanolamide has been used for the first time to modify bituminous binder, andBituminous binder was modified more than once with the chemical by changing modification parameters andThe examinations showed that Cocamide Diethanolamide softens bituminous binder and lowers processingIn addition, compared to reference binder, rutting resistances of modified bituminous binders decreased

Keywords： Cocamide Diethanolamide     bitumen modification     rheology     Superpave tests    

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Numerical simulation of combustion characteristics at different coal concentrations in bituminous coal

Chunlong LIU, Qunyi ZHU, Zhengqi LI, Qiudong ZONG, Yiquan XIE, Lingyan ZENG

Frontiers in Energy 2013, Volume 7, Issue 2,   Pages 255-262 doi: 10.1007/s11708-013-0255-9

Abstract: With the objective of producing a full-scale tiny-oil ignition burner, identical to the burner used in an 800 MWe utility boiler, numerical simulations were performed using Fluent 6.3.26 to study the progress of ignition for four coal concentration settings covering sub-operation conditions prevailing during the experiments performed with the burner. The numerical simulations conformed to the experimental results, demonstrating the suitability of the model used in the calculations. Simulations for a coal concentration of 0.40 kg/kg corresponding to a single burner operating at its rated output were also conducted, which indicated that gas temperatures along the burner centerline were high. As gas flowed to the burner nozzle, the high-temperature region expanded, ensuring a successful pulverized-coal ignition. With increasing coal concentration (0.08–0.40 kg/kg), the gas temperature along the burner centerline and at the first and second combustion chamber exits decreased at the equivalent radial points. At the center of the second combustion chamber exit, the O concentrations were almost depleted for the five coal concentrations, while the CO concentrations peaked.

Keywords： numerical simulation     tiny-oil ignition burner     pulverized coal     temperature field    

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Influence of different oil feed rate on bituminous coal ignition in a full-scale tiny-oil ignition burner

Chunlong LIU, Qunyi ZHU, Zhengqi LI, Qiudong ZONG, Xiang ZHANG, Zhichao CHEN

Frontiers in Energy 2013, Volume 7, Issue 3,   Pages 406-412 doi: 10.1007/s11708-013-0266-6

Abstract: experiments performed on a full-scale experimental setup, the influence of different oil flow rates on bituminous

Keywords： ignition     coal     burner     boiler     oil flow rate    

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Numerical simulation of bituminous coal combustion in a full-scale tiny-oil ignition burner: influence

Zhengqi LI, Chunlong LIU, Xiang ZHANG, Lingyan ZENG, Zhichao CHEN

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 296-303 doi: 10.1007/s11708-012-0191-0

Abstract: The progression of ignition was numerically simulated with the aim of realizing a full-scale tiny-oil ignition burner that is identical to the burner used in an 800 MWe utility boiler. The numerical simulations were conducted for four excess air ratios, 0.56, 0.75, 0.98 and 1.14 (corresponding to primary air velocities of 17, 23, 30 and 35 m/s, respectively), which were chosen because they had been used previously in practical experiments. The numerical simulations agreed well with the experimental results, which demonstrate the suitability of the model used in the calculations. The gas temperatures were high along the center line of the burner for the four excess air ratios. The flame spread to the burner wall and the high-temperature region was enlarged in the radial direction along the primary air flow direction. The O concentrations for the four excess air ratios were 0.5%, 1.1%, 0.9% and 3.0% at the exit of the second combustion chamber. The CO peak concentration was very high with values of 7.9%, 9.9%, 11.3% and 10.6% for the four excess air ratios at the exit of the second combustion chamber.

Keywords： numerical simulation     tiny-oil ignition burner     pulverized coal     temperature field    

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nominal maximum aggregate sizes in the bending beam rheometer on the prediction of thermal properties of bituminous

Chun-Hsing HO,María Francisca Martínez GONZÁLEZ,Cristina Pilar Martín LINARES

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1,   Pages 1-7 doi: 10.1007/s11709-016-0367-5

Abstract: The objective of this research is to evaluate an impact of asphalt mixture beams with varying sizes of aggregate in the Bending Beam Rheometer (BBR) for testing/predicting thermal cracking properties of asphalt pavements. The BBR test has following benefits: the equipment is cheaper, it uses smaller specimens, faster conditioning, easier availability for quality control, easier to manage, etc. However some concerns have been raised: some consider that the size of the aggregate may affect the test’s results; the other concern is that such small beams cannot represent the whole properties of the asphalt pavement. To address these criticisms, imaging techniques, statistical analysis, and viscoelastic modeling are used. Asphalt thin beams prepared with three different nominal maximum aggregate size (NMAS) (12.5mm, 9.5 mm, and 4.75 mm) were tested at three different temperatures (-18°C, -24°C, and -30°C). Based on results from statistical analyses and viscoelasticity, the ratio of asphalt binders and voids and stiffness differences among the three NMAS specimens are not significant, meaning that the impact of asphalt thin beams prepared with the three NMAS on the prediction of thermal cracking is minimal and can be neglected.

Keywords： bending beam rheometer     thin beams     thermal cracking    

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Ergodic secrecy capacity ofMRC/SC in single-inputmultiple-output wiretap systems with imperfect channel Article

Hui ZHAO, You-yu TAN, Gao-feng PAN, Yun-fei CHEN

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 4,   Pages 578-590 doi: 10.1631/FITEE.1500430

Abstract: paper investigates the secrecy performance of maximal ratio combining (MRC) and selection combining (SC, a source transmits confidential messages to the destination equipped with antennas using the MRC/SCAn eavesdropper equipped with antennas also adopts the MRC/SC scheme to promote successful eavesdroppingexpressions for the ergodic secrecy capacity (ESC) in two cases: (1) MRC with weighting errors, and (2) SC

Keywords： ESC)     Maximal ratio combining (MRC)     Weighting errors     Physical layer security     Selection combining (SC    

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Preparation of polyvinylpyrrolidone / poly(ethylene-co-vinyl alcohol) blend membranes and the oil/water

Bai Yunxiang,Wu Guoliang,Zhang Chunfang,Gu Jin,Sun Yuping

Strategic Study of CAE 2014, Volume 16, Issue 7,   Pages 79-83

Abstract:

PVP/EVAL blend membranes was prepared by blending of PVP with poly(ethylene-co-vinylThe chemical structure, morphology, mechanical performance and hydrophilicity of PVP/EVAL blend membranesThe tensile strength and elongation at break of PVP/EVAL blend membrane with 10 wt% (the mass percentWhen the content of PVP increased to 4 wt%, oil/water emulsion flux of PVP/EVAL blend membrane were 1.81

Keywords： PVP     EVAL     blend membrane     oil/water separation     immersion precipitation    

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Expulsive force in the development of CO

Haizhu WANG,Gensheng LI,Zhonghou SHEN,Zhenguo HE,Qingling LIU,Bin ZHU,Youwen WANG,Meng WANG

Frontiers in Energy 2019, Volume 13, Issue 1,   Pages 1-8 doi: 10.1007/s11708-017-0458-6

Abstract: Supercritical CO (SC-CO ) has prominent advantages in well drilling, fracturing, displacement, storageIn this paper, based on physicochemical properties of SC-CO fluid, a detailed analysis of technicaladvantages of SC-CO applied in oil and gas development is illustrated.Furthermore, the implementation processes of SC-CO are also proposed.

Keywords： CO2 sequestration     SC-CO2 jet     well drilling     fracturing     oil and gas    

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Title Author Date Type Operation

Influence of nozzle height to width ratio on ignition and NO

Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU

Journal Article

Effects of pyrolyzed semi-char blend ratio on coal combustion and pollution emission in a 0.35 MW pulverized

Yonghong YAN, Liutao SUN, Zhengkang PENG, Hongliang QI, Li LIU, Rui SUN

Journal Article

Modeling of unconfined compressive strength of soil-RAP blend stabilized with Portland cement using multivariate

Ali Reza GHANIZADEH, Morteza RAHROVAN

Journal Article

Influence of soft rock-fill material as dam embankment with central bituminous concrete membrane

Peter TSCHERNUTTER

Journal Article

Effect of temperature on Lu’an bituminous char structure evolution in pyrolysis and combustion

Yandi ZHANG, Yinhe LIU, Xiaoli DUAN, Yao ZHOU, Xiaoqian LIU, Shijin XU

Journal Article

utilization of coal resources: The polygeneration system of a combination of the gasified coal gas and the pyrolyzed

Kechang XIE, Fan LI

Journal Article

A study on quality evaluation for bituminous mixture using X-ray CT

Satoshi TANIGUCHI, Keiichiro OGAWA, Jun OTANI, Itaru NISHIZAKI

Journal Article

Investigation of effects of Cocamide Diethanolamide chemical on physical and rheological properties of bituminous

Journal Article

Numerical simulation of combustion characteristics at different coal concentrations in bituminous coal

Chunlong LIU, Qunyi ZHU, Zhengqi LI, Qiudong ZONG, Yiquan XIE, Lingyan ZENG

Journal Article

Influence of different oil feed rate on bituminous coal ignition in a full-scale tiny-oil ignition burner

Chunlong LIU, Qunyi ZHU, Zhengqi LI, Qiudong ZONG, Xiang ZHANG, Zhichao CHEN

Journal Article

Numerical simulation of bituminous coal combustion in a full-scale tiny-oil ignition burner: influence

Zhengqi LI, Chunlong LIU, Xiang ZHANG, Lingyan ZENG, Zhichao CHEN

Journal Article

nominal maximum aggregate sizes in the bending beam rheometer on the prediction of thermal properties of bituminous

Chun-Hsing HO,María Francisca Martínez GONZÁLEZ,Cristina Pilar Martín LINARES

Journal Article

Ergodic secrecy capacity ofMRC/SC in single-inputmultiple-output wiretap systems with imperfect channel

Hui ZHAO, You-yu TAN, Gao-feng PAN, Yun-fei CHEN

Journal Article

Preparation of polyvinylpyrrolidone / poly(ethylene-co-vinyl alcohol) blend membranes and the oil/water

Bai Yunxiang,Wu Guoliang,Zhang Chunfang,Gu Jin,Sun Yuping

Journal Article

Expulsive force in the development of CO

Haizhu WANG,Gensheng LI,Zhonghou SHEN,Zhenguo HE,Qingling LIU,Bin ZHU,Youwen WANG,Meng WANG

Journal Article