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| 1 | Experimental investigation of ash deposits on convection heating surfaces of a circulating fluidized bed municipal solid waste incinerator显示文摘Incineration of municipal solid waste(MSW) is a waste treatment method which can be sustainable in terms of waste volume reduction, as well as a source of renewable energy.During MSW combustion, increased formation of deposits on convection heating exchanger surfaces can pose severe operational problems, such as fouling, slagging and corrosion.These problems can cause lower heat transfer efficiency from the hot flue gas to the working fluid inside the tubes. A study was performed where experiments were carried out to examine the ash deposition characteristics in a full-scale MSW circulating fluidized bed(CFB) incinerator, using a newly designed deposit probe that was fitted with six thermocouples and four removable half rings. The influence of probe exposure time and probe surface temperature(500, 560, and 700℃) on ash deposit formation rate was investigated. The results indicate that the deposition mass and collection efficiency achieve a minimum at the probe surface temperature of 560℃. Ash particles are deposited on both the windward and leeward sides of the probe by impacting and thermophoretic/condensation behavior. The major inorganic elements present in the ash deposits are Ca,Al and Si. Compared to ash deposits formed on the leeward side of the probe,windward-side ash deposits contain relatively higher Ca and S concentrations, but lower levels of Al and Si. Among all cases at different surface temperatures, the differences in elemental composition of the ash deposits from the leeward side are insignificant.However, as the surface temperature increases, the concentrations of Al, Si, K and Na in the windward-side ash deposits increase, but the Ca concentration is reduced. Finally,governing mechanisms are proposed on the basis of the experimental data, such as deposit morphology, elemental composition and thermodynamic calculations. | Zhi Tang Xiaoping Chen Daoyin Liu Yaming Zhuang Minghua Ye Hongchan Sheng Shaojuan Xu | 2016 | Journal of Environmental Sciences2016，28，10： | 6 |
| 2 | Chirp-coded robust synthetic aperture technique for medical endoscopic ultrasonography显示文摘A chirp-coded robust synthetic aperture(CRSA) technique for medical endoscopic ultrasonography is presented.The technique uses chirp-coded excitation and pulse compression to enhance the robustness of synthetic aperture technique.The effect of resolution enhancement by the CRSA technique is demonstrated by both Field II simulation and practical experiment. Data for 6 point targets is simulated and the performance of CRSA is compared with that of conventional barker-coded synthetic aperture technique(BSA).Nylon ropes are examined by a single element transducer centered at 8 MHz.Both simulation and experimental results indicated that CRSA can improve resolution of ultrasound images with good robustness as compared with the conventional BSA technique.The lateral resolution is upgraded to 1.4 mm from 1.8 mm.The main-lobe broadening and SNR degradation are 0.04 mm and 0.2 dB respectively,which are 0.95 mm and 3.6 dB lower than those of BSA,when the sound speed error is 6%of the true value 1540 m/s.It therefore can be concluded that CRSA has more robustness than BSA against the disturbance caused by sound speed errors. | LIMing CHEN Xiaodong LI Yan WANG Yi YU Daoyin | 2012 | Chinese Journal of Acoustics2012，31，4： | 4 |
| 3 | Comparative study of two fluid model and dense discrete phase model for simulations of gas-solid hydrodynamics in circulating fluidized beds显示文摘Computational fluid dynamics(CFD)has become a valuable tool to study the complex gas-solid hydrodynamics in the circulating fluidized bed(CFB).Based on the two fluid model(TFM)under the Eulerian-Eulerian framework and the dense discrete phase model(DDPM)under the Eulerian-Lagrangian framework,this work conducts the comparative study of the gas-solid hydrodynamics in a CFB riser by these two different models.Results show that DDPM could be used to predict gas-solid hydrodynamics in the circulating fluidized bed,and there are differences between TFM and DDPM,especially in the radial distribution profiles of solid phase.Sensitivity analysis results show that the gas-solid drag model exhibits significant effects on the results for both the two models.The specularity coefficient and the restitution coefficient in the TFM,as well as the reflection coefficient and the parcel number in the DDPM,exhibit less impact on the simulated results. | Ying Wu Daoyin Liu Jinding Hu Jiliang Ma Xiaoping Chen | 2021 | Particuology2021，19，2： | 3 |
| 4 | Research on Testing Technologies of Network System in Smart Substations显示文摘The network structures of smart substations and the characteristics of industrial Ethernet switches are analyzed.The testing technologies of network systems based on smart substations are specifically elaborated.A viewpoint is proposed that special testing policy&method of smart substation networks should be followed,so that the results can reveal the real network data exchange performance of the whole station.This view ensures the safety and stability of smart substations and lays a foundation for future upgrades and expansions. | Zhang Xiaofei Wang Jiesong Zhang Daoyin Zhang Zhiming Zhao Ruying | 2012 | Electricity2012，23，3： | 2 |
| 5 | Bubbling behavior of cohesive particles in a two-dimensional fluidized bed with immersed tubes显示文摘 | Jiliang Ma Daoyin Liu Xiaoping Chen | 2017 | Particuology2017，15，2： | 2 |
| 6 | Computer pseudo color equi-density coding of gray image based on triprimary colors of RGB and pixel's self-transformations显示文摘 | Cao Maoyong Sun Nongliang Yu Daoyin | 2001 | Proceeding of Society for Optical International Engineering2001，4551，： | 1 |
| 7 | Study on P1 Parameters Dynamic Tuning Based on Ant Colony Algorithm for Doubly-fed Wind Turbines 显示文摘 | Bo Gu Xiaodan Li Daoyin Qiu | 2014 | International Journal of Control and Automation ($2005-4297)2014，7，2： | 1 |
| 8 | APPLICATION OF CDF(2,2) TO ANALYSIS OF SUSPENDED SEDIMENT IMAGE显示文摘The characteristics of suspended sediment image can be reflected by the coefficients of biorthogonal wavelet transform of CDF(2,2). Based on the power distribution in different scales, an adaptive algorithm is proposed in this paper, whereby the coefficients are adjusted non-linearly. The particle information can be well retained while the useless background is removed. In this way, satisfactory binary image can be obtained for further analysis of the sediment particle. | Hequan Sun Liansheng Yu Yongming Shen Daoyin Yu Guangwen Zhu | 2005 | China Particuology2005，3，4： | 1 |
| 9 | Modeling and simulating for two dimensional infrared photonic crystal devices显示文摘 | Zheng Hongxing Yu Daoyin | 2004 | Int J Infrared Millimeter Waves2004，25，4： | 1 |
| 10 | Influence of cycle time distribution on coating uniformity of particles in a spray fluidized bed by using CFD-DEM simulations显示文摘Cycle Time Distribution(CTD)plays a critical role for determining uniformity of particle coating in spray fluidized beds.However,the CTD is influenced by both geometrical structure and operating conditions of fluidized bed.In this study,a spray fluidized bed of coating process is simulated by a comprehensive Computational Fluid Dynamics-Discrete Element Model(CFD-DEM).To achieve different behaviors of CTD,some modifications are designed on a pseudo-2D internally circulating fluidized bed,which traditionally composes of a high-velocity upward bed and low-velocity downward bed.These modifi-cations include making the air distributor slope and/or laying a baffle in the downward bed.First,the CTD and evolution of particle size distribution under different bed structures are compared.The CTD directly influences the coating uniformity.By making the particles flowing along a parallel direction in the downward bed through the geometrical modifications,the CTD becomes narrower and the coating uniformity is significantly improved.Second,under the optimized bed structure,the influence of oper-ating conditions on the coating uniformity is studied.Properly increasing the fluidization gas velocity and the fluidization gas temperature and reducing the liquid spray rate can improve the coating uniformity. | Heng Li Daoyin Liu Jiliang Ma Xiaoping Chen | 2023 | Particuology2023，，5： | 1 |
| 11 | Fly ash recirculation by bottom feeding on a circulating fluidized bed boiler co-burning coal sludge and coal显示文摘 | Lunbo Duan Daoyin Liu Xiaoping Chen Changsui Zhao | 2012 | Applied Energy2012，，： | 1 |
| 12 | Simu- lation of char and propane combustion in a fluidized bed by extending DEM-CFD approach显示文摘 | LIU Daoyin CHEN Xiaoping ZHOU Wu | 2011 | Proceedings of the Combustion Institute2011，33，2： | 1 |
| 13 | Simula- tion of char and propane combustion in a fluidized bed by extending DEM-CFD approach显示文摘 | Liu Daoyin Chen Xiaoping Zhou Wu | 2011 | Proceedings of the Combustion Institute2011，33，2： | 1 |
| 14 | Devel- opment and test of CFD-DEM model for complex ge- ometry: a coupling algorithm for Fluent and DEM 显示文摘 | LIU Daoyin BU Changsheng CHEN Xiaoping | 2013 | Computers & Chemical Engineering2013，58，11： | 1 |
| 15 | Ignition behavior of single coal particle in a fluidized bed under O2/CO2 and O2/N2atmospheres:A combination of visual image and particle temperature显示文摘 | Bu Changsheng Liu Daoyin Chen Xiaoping etc | 2014 | Applied Energy2014，115，30： | 1 |
| 16 | Computer pseudo-color equi-density coding of gray image based on tri-primary colors of RGB and pixel's self-transformations显示文摘 | Sun Nongliang Yu Daoyin | 2001 | SPIE2001，4551，： | 1 |
| 17 | Computer pseudocolor equi-density coding of gray image based on tri-primary colors of RGB and pixel's self-transformations显示文摘 | Nongliang Sun Daoyin Yu | 2001 | Proc of SPIE2001，4551，： | 1 |
| 18 | Tracking vessels in X-ray angiogram sequences based on deformable model显示文摘 | Sun Zheng Yu Daoyin | 2005 | Iranian Journal of Electrical and Computer Engineering2005，4，2： | 1 |
| 19 | Support vector machine with parameter optimization by a novel hybrid method and its application to fault diagnosis显示文摘 | Xiaoyuan Zhang Daoyin Qiu Fuan Chen | 2014 | Neurocomputing2014，，： | 1 |
| 20 | Modeling of single coal particle combustion in O_(2)/N_(2)and O_(2)/CO_(2)atmospheres under fluidized bed condition显示文摘A one-dimensional transient single coal particle combustion model was proposed to investigate the characteristics of single coal particle combustion in both O_(2)/N_(2)and O_(2)/CO_(2)atmospheres under the fluidized bed combustion condition.The model accounted for the fuel devolatilization,moisture evaporation,heterogeneous reaction as well as homogeneous reactions integrated with the heat and mass transfer from the fluidized bed environment to the coal particle.This model was validated by comparing the model prediction with the experimental results in the literature,and a satisfactory agreement between modeling and experiments proved the reliability of the model.The modeling results demonstrated that the carbon conversion rate of a single coal particle(diameter 6 to 8 mm)under fluidized bed conditions(bed temperature 1088 K)in an O_(2)/CO_(2)(30:70)atmosphere was promoted by the gasification reaction,which was considerably greater than that in the O_(2)/N_(2)(30:70)atmosphere.In addition,the surface and center temperatures of the particle evolved similarly,no matter it is under the O_(2)/N_(2)condition or the O_(2)/CO_(2)condition.A further analysis indicated that similar trends of the temperature evolution under different atmospheres were caused by the fact that the strong heat transfer under the fluidized bed condition overwhelmingly dominated the temperature evolution rather than the heat release of the chemical reaction. | Xiehe YANG Yang ZHANG Daoyin LIU Jiansheng ZHANG Hai ZHANG Junfu LYU Guangxi YUE | 2021 | Frontiers in Energy2021，15，1： | 0 |
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