The Experts below are selected from a list of 12213 Experts worldwide ranked by ideXlab platform
Adeniyi J. Isafiade - One of the best experts on this subject based on the ideXlab platform.
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interval based minlp superstructure synthesis of combined heat and mass exchanger networks
Chemical Engineering Research & Design, 2009Co-Authors: Adeniyi J. IsafiadeAbstract:An interval based superstructure approach for combining the synthesis of heat and mass exchanger networks is presented in this paper. The technique involves combining the interval based MINLP superstructure (IBMS) for the synthesis of heat exchanger networks (HENs) with that of mass exchanger networks (MENs). The two networks are made to interact through the Lean Stream in the mass exchange network. The new approach involves the use of the Lean subStream concept to explore potential mass exchange temperatures. An example which involves a one-Lean Stream mass exchange problem alongside regeneration and hot and cold utilities is presented.
Wenming Yang - One of the best experts on this subject based on the ideXlab platform.
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study on ignition behaviors of bias parallel pulverized coal Streams in a reducing atmosphere influences of exit velocity
Fuel, 2020Co-Authors: Guang Zeng, Yijun Zhao, Yongtie Cai, Zhimin Zheng, Wenming YangAbstract:Abstract Ignition experiments regarding the combustion of Indonesian coal were performed in a reducing atmosphere using a bias combustion simulator with a thermal power of 250-kW. Flame spectra, gas temperatures and gas species were recorded, and coal combustion residues were sampled. The influences of exit velocity on the ignition mechanism, ignition delay distance, continuous flame boundary and fuel NOx formation of bias parallel pulverized-coal Streams were investigated. The experimental results reveal that as exit velocity increased, the peak value of visible-light intensity, the combustion efficiency and the flame stability gradually decreased, while the ignition delay distance, the continuous flame boundary, and the formation of fuel NOx gradually increased. Furthermore, the ignition behaviors became worse. A transition of ignition mechanism occurred with increasing exit velocity, at an exit velocity of 16 m/s, the bias parallel pulverized-coal Streams ignited in a hetero-homogeneous joint mechanism; at exit velocities of 20, 25 and 29 m/s, the bias parallel pulverized-coal Streams ignited in a homogeneous mechanism. For different exit velocities, the fuel-rich Stream ignited in advance of the fuel-Lean Stream, and the continuous flame boundary Leaned evidently towards the fuel-rich Stream side. According to the experimental findings in the present study, the horizontal bias combustion pulverized-coal burners were designed and applied to one-sixth of the total burners in a tangentially-fired pulverized-coal boiler. At the rated electrical load of 500 MWe, the NOx concentration prior to denitrification decreased by 11%, and the ammonium consumption for denitrification decreased by 42 kg/h. The results of the present study are also beneficial to further advance ignition concepts of low NOx bias combustion of pulverized-coal and enable the related numerical simulation work.
Guang Zeng - One of the best experts on this subject based on the ideXlab platform.
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study on ignition behaviors of bias parallel pulverized coal Streams in a reducing atmosphere influences of exit velocity
Fuel, 2020Co-Authors: Guang Zeng, Yijun Zhao, Yongtie Cai, Zhimin Zheng, Wenming YangAbstract:Abstract Ignition experiments regarding the combustion of Indonesian coal were performed in a reducing atmosphere using a bias combustion simulator with a thermal power of 250-kW. Flame spectra, gas temperatures and gas species were recorded, and coal combustion residues were sampled. The influences of exit velocity on the ignition mechanism, ignition delay distance, continuous flame boundary and fuel NOx formation of bias parallel pulverized-coal Streams were investigated. The experimental results reveal that as exit velocity increased, the peak value of visible-light intensity, the combustion efficiency and the flame stability gradually decreased, while the ignition delay distance, the continuous flame boundary, and the formation of fuel NOx gradually increased. Furthermore, the ignition behaviors became worse. A transition of ignition mechanism occurred with increasing exit velocity, at an exit velocity of 16 m/s, the bias parallel pulverized-coal Streams ignited in a hetero-homogeneous joint mechanism; at exit velocities of 20, 25 and 29 m/s, the bias parallel pulverized-coal Streams ignited in a homogeneous mechanism. For different exit velocities, the fuel-rich Stream ignited in advance of the fuel-Lean Stream, and the continuous flame boundary Leaned evidently towards the fuel-rich Stream side. According to the experimental findings in the present study, the horizontal bias combustion pulverized-coal burners were designed and applied to one-sixth of the total burners in a tangentially-fired pulverized-coal boiler. At the rated electrical load of 500 MWe, the NOx concentration prior to denitrification decreased by 11%, and the ammonium consumption for denitrification decreased by 42 kg/h. The results of the present study are also beneficial to further advance ignition concepts of low NOx bias combustion of pulverized-coal and enable the related numerical simulation work.
Kathleen B Aviso - One of the best experts on this subject based on the ideXlab platform.
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a superstructure model for the synthesis of single contaminant water networks with partitioning regenerators
Process Safety and Environmental Protection, 2009Co-Authors: Raymond R Tan, Dominic C Y Foo, Kathleen B AvisoAbstract:Abstract This paper presents a novel superstructure-based optimization model for the synthesis of industrial water networks with partitioning regenerators. Such regenerators function by splitting a contaminated water Stream into a regenerated Lean Stream and a low-quality reject Stream. Membrane separation-based processes are examples of these types of regenerators. The optimization model presented in this work integrates a single, centralized partitioning regenerator with a source–demand superstructure under the assumption that the processes within the plant are of the fixed flow rate type. The formulation is non-linear as a result of the presence of bilinear terms in the regenerator balance equations, but global optimal solutions can be found using commercial software. The features of the model are illustrated by solving case studies from the literature. It is notable from these examples that considerable design flexibility exists in networks of this type, since potentially both the Lean and reject Streams from the partitioning regenerator can be reused/recycled within the plant.
Yijun Zhao - One of the best experts on this subject based on the ideXlab platform.
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study on ignition behaviors of bias parallel pulverized coal Streams in a reducing atmosphere influences of exit velocity
Fuel, 2020Co-Authors: Guang Zeng, Yijun Zhao, Yongtie Cai, Zhimin Zheng, Wenming YangAbstract:Abstract Ignition experiments regarding the combustion of Indonesian coal were performed in a reducing atmosphere using a bias combustion simulator with a thermal power of 250-kW. Flame spectra, gas temperatures and gas species were recorded, and coal combustion residues were sampled. The influences of exit velocity on the ignition mechanism, ignition delay distance, continuous flame boundary and fuel NOx formation of bias parallel pulverized-coal Streams were investigated. The experimental results reveal that as exit velocity increased, the peak value of visible-light intensity, the combustion efficiency and the flame stability gradually decreased, while the ignition delay distance, the continuous flame boundary, and the formation of fuel NOx gradually increased. Furthermore, the ignition behaviors became worse. A transition of ignition mechanism occurred with increasing exit velocity, at an exit velocity of 16 m/s, the bias parallel pulverized-coal Streams ignited in a hetero-homogeneous joint mechanism; at exit velocities of 20, 25 and 29 m/s, the bias parallel pulverized-coal Streams ignited in a homogeneous mechanism. For different exit velocities, the fuel-rich Stream ignited in advance of the fuel-Lean Stream, and the continuous flame boundary Leaned evidently towards the fuel-rich Stream side. According to the experimental findings in the present study, the horizontal bias combustion pulverized-coal burners were designed and applied to one-sixth of the total burners in a tangentially-fired pulverized-coal boiler. At the rated electrical load of 500 MWe, the NOx concentration prior to denitrification decreased by 11%, and the ammonium consumption for denitrification decreased by 42 kg/h. The results of the present study are also beneficial to further advance ignition concepts of low NOx bias combustion of pulverized-coal and enable the related numerical simulation work.