The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform
Syed Akhlaq Ahmad - One of the best experts on this subject based on the ideXlab platform.
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entrainer based Economical Design and plantwide control study for tetrahydrofuran water separation process
Chemical Engineering Research & Design, 2018Co-Authors: Asma Iqbal, Syed Akhlaq AhmadAbstract:Abstract In this work, the control structure Design for a continuous extractive distillation scheme using entrainers for separating THF–water azeotropic mixture into high purity product (THF) has been studied. The selection of suitable entrainer for the undertaken process was purely based on Economical Design criteria where total annualised cost (TAC) for different entrainers were first calculated and further compared. Once the suitable entrainer was selected based on the Design economics, later the plantwide control structure was evaluated for disturbance rejection capabilities and smooth process operations in the face of feed throughput and composition change. For Economical Design operations, the recycle rate of entrainers has to be kept around a minimum recycle rate. However, operating below minimum entrainer recycle rate leads the product purity to fall sharply in conventional control structure Designs due to THF–Water azeotropic constraints. The presented control structure Design in this works ensures that product purity is not lost even in case of sever disturbances in feed throughput (by ±10%) or a changed feed composition (by ±5%).
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Entrainer based Economical Design and plantwide control study for Tetrahydrofuran/Water separation process
Chemical Engineering Research and Design, 2018Co-Authors: Asma Iqbal, Syed Akhlaq Ahmad, OjasviAbstract:Abstract In this work, the control structure Design for a continuous extractive distillation scheme using entrainers for separating THF–water azeotropic mixture into high purity product (THF) has been studied. The selection of suitable entrainer for the undertaken process was purely based on Economical Design criteria where total annualised cost (TAC) for different entrainers were first calculated and further compared. Once the suitable entrainer was selected based on the Design economics, later the plantwide control structure was evaluated for disturbance rejection capabilities and smooth process operations in the face of feed throughput and composition change. For Economical Design operations, the recycle rate of entrainers has to be kept around a minimum recycle rate. However, operating below minimum entrainer recycle rate leads the product purity to fall sharply in conventional control structure Designs due to THF–Water azeotropic constraints. The presented control structure Design in this works ensures that product purity is not lost even in case of sever disturbances in feed throughput (by ±10%) or a changed feed composition (by ±5%).
Asma Iqbal - One of the best experts on this subject based on the ideXlab platform.
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entrainer based Economical Design and plantwide control study for tetrahydrofuran water separation process
Chemical Engineering Research & Design, 2018Co-Authors: Asma Iqbal, Syed Akhlaq AhmadAbstract:Abstract In this work, the control structure Design for a continuous extractive distillation scheme using entrainers for separating THF–water azeotropic mixture into high purity product (THF) has been studied. The selection of suitable entrainer for the undertaken process was purely based on Economical Design criteria where total annualised cost (TAC) for different entrainers were first calculated and further compared. Once the suitable entrainer was selected based on the Design economics, later the plantwide control structure was evaluated for disturbance rejection capabilities and smooth process operations in the face of feed throughput and composition change. For Economical Design operations, the recycle rate of entrainers has to be kept around a minimum recycle rate. However, operating below minimum entrainer recycle rate leads the product purity to fall sharply in conventional control structure Designs due to THF–Water azeotropic constraints. The presented control structure Design in this works ensures that product purity is not lost even in case of sever disturbances in feed throughput (by ±10%) or a changed feed composition (by ±5%).
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Entrainer based Economical Design and plantwide control study for Tetrahydrofuran/Water separation process
Chemical Engineering Research and Design, 2018Co-Authors: Asma Iqbal, Syed Akhlaq Ahmad, OjasviAbstract:Abstract In this work, the control structure Design for a continuous extractive distillation scheme using entrainers for separating THF–water azeotropic mixture into high purity product (THF) has been studied. The selection of suitable entrainer for the undertaken process was purely based on Economical Design criteria where total annualised cost (TAC) for different entrainers were first calculated and further compared. Once the suitable entrainer was selected based on the Design economics, later the plantwide control structure was evaluated for disturbance rejection capabilities and smooth process operations in the face of feed throughput and composition change. For Economical Design operations, the recycle rate of entrainers has to be kept around a minimum recycle rate. However, operating below minimum entrainer recycle rate leads the product purity to fall sharply in conventional control structure Designs due to THF–Water azeotropic constraints. The presented control structure Design in this works ensures that product purity is not lost even in case of sever disturbances in feed throughput (by ±10%) or a changed feed composition (by ±5%).
Ojasvi - One of the best experts on this subject based on the ideXlab platform.
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Entrainer based Economical Design and plantwide control study for Tetrahydrofuran/Water separation process
Chemical Engineering Research and Design, 2018Co-Authors: Asma Iqbal, Syed Akhlaq Ahmad, OjasviAbstract:Abstract In this work, the control structure Design for a continuous extractive distillation scheme using entrainers for separating THF–water azeotropic mixture into high purity product (THF) has been studied. The selection of suitable entrainer for the undertaken process was purely based on Economical Design criteria where total annualised cost (TAC) for different entrainers were first calculated and further compared. Once the suitable entrainer was selected based on the Design economics, later the plantwide control structure was evaluated for disturbance rejection capabilities and smooth process operations in the face of feed throughput and composition change. For Economical Design operations, the recycle rate of entrainers has to be kept around a minimum recycle rate. However, operating below minimum entrainer recycle rate leads the product purity to fall sharply in conventional control structure Designs due to THF–Water azeotropic constraints. The presented control structure Design in this works ensures that product purity is not lost even in case of sever disturbances in feed throughput (by ±10%) or a changed feed composition (by ±5%).
Vishwas A. Sawant - One of the best experts on this subject based on the ideXlab platform.
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Economical Design of Reinforced Slope Using Geosynthetics
Geotechnical and Geological Engineering, 2019Co-Authors: Priyanka Sharma, B. Mouli, Ravi S. Jakka, Vishwas A. SawantAbstract:Slope failures triggered by earthquakes are one of the most important geotechnical earthquake hazards that can cause severe damage to road/rail embankments, bridge abutments and dams. In the present paper, a road embankment of height 5 m is Designed for Roorkee region using locally available soil as per the Indian Standards Specifications. Seismic slope stability analysis is also carried out to ensure the safety of the constructed or Designed embankment under seismic loading appropriate to the considered region. The factor of safety obtained is unsatisfactory and hence there was need of reinforcement. Geosynthetics used for reinforcement include geotextiles and geogrids. Geosynthetics aims to ensure strength, stability and serviceability over its intented life span. To assess slope stability of reinforced slope, a single soil slope was analysed using Geostudio 2004 to estimate factor of safety under static and dynamic conditions. This study proposes a geotechnical stable slope embankment and also, the Economical Design using geosynthetics in both static and dynamic loading conditions which can be of great help in practical applications of geotechnical earthquake engineering.
Roberto Da Costa Quinino - One of the best experts on this subject based on the ideXlab platform.
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integrating on line process control and imperfect corrective maintenance an Economical Design
European Journal of Operational Research, 2012Co-Authors: Linda Lee Ho, Roberto Da Costa QuininoAbstract:Existing studies of on-line process control are concerned with economic aspects, and the parameters of the processes are optimized with respect to the average cost per item produced. However, an equally important dimension is the adoption of an efficient maintenance policy. In most cases, only the frequency of the corrective adjustment is evaluated because it is assumed that the equipment becomes “as good as new” after corrective maintenance. For this condition to be met, a sophisticated and detailed corrective adjustment system needs to be employed. The aim of this paper is to propose an integrated economic model incorporating the following two dimensions: on-line process control and a corrective maintenance program. Both performances are objects of an average cost per item minimization. Adjustments are based on the location of the measurement of a quality characteristic of interest in a three decision zone. Numerical examples are illustrated in the proposal.
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On-Line Process Control using Attributes with Misclassification Errors: An Economical Design for Short-Run Production
Communications in Statistics - Theory and Methods, 2012Co-Authors: Lupércio França Bessegato, Roberto Da Costa Quinino, Luiz Henrique DuczmalAbstract:On-line process control consists of inspecting a single item for every m (integer and m ≥ 2) produced items. Based on the results of the inspection, it is decided whether the process is in-control (the fraction of conforming items is p 1; State I) or out-of-control (the fraction of conforming items is p 2
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Integrating on-line process control and imperfect corrective maintenance: An Economical Design
European Journal of Operational Research, 2012Co-Authors: Roberto Da Costa QuininoAbstract:Existing studies of on-line process control are concerned with economic aspects, and the parameters of the processes are optimized with respect to the average cost per item produced. However, an equally important dimension is the adoption of an efficient maintenance policy. In most cases, only the frequency of the corrective adjustment is evaluated because it is assumed that the equipment becomes "as good as new" after corrective maintenance. For this condition to be met, a sophisticated and detailed corrective adjustment system needs to be employed. The aim of this paper is to propose an integrated economic model incorporating the following two dimensions: on-line process control and a corrective maintenance program. Both performances are objects of an average cost per item minimization. Adjustments are based on the location of the measurement of a quality characteristic of interest in a three decision zone. Numerical examples are illustrated in the proposal. (c) 2012 Elsevier B.V. All rights reserved.CNPq Universal [472636/2009-0]CNPq Universa
