In this work, a CO2 absorption process using aqueous monoethanol amine (MEA) as solvent for a post combustion capture plant was simulated using Aspen HYSYS. An Aspen HYSYS spreadsheet was used for equipment dimensioning, cost estimation and cost optimization. A standard process and a vapor recompression process for 85 % CO2 removal were simulated using the Li-Mather thermodynamic model. The energy consumptions and the total cost were calculated and compared. Cost optimum process parameters were calculated from sensitivity analysis. The vapor recompression process was shown to be both energy and cost optimum. With 20 years calculation period, the cost optimum absorber packing height was 16 meter, optimum temperature approach was 14 K and optimum recompression pressure was 130 kPa. With 10 years calculation period, the optimum values for the same parameters were 16 meter, 17 K and 140 kPa. Calculations of optimum process parameters dependent on factors like the calculation period have not been found in literature. Except from the temperature approach, the optimum values varied only slightly when the calculation period was changed.
{"title":"Cost Optimization of Absorption Capture Process","authors":"Cemil Şahin, L. Øi","doi":"10.3384/ECP17142187","DOIUrl":"https://doi.org/10.3384/ECP17142187","url":null,"abstract":"In this work, a CO2 absorption process using aqueous monoethanol amine (MEA) as solvent for a post combustion capture plant was simulated using Aspen HYSYS. An Aspen HYSYS spreadsheet was used for equipment dimensioning, cost estimation and cost optimization. A standard process and a vapor recompression process for 85 % CO2 removal were simulated using the Li-Mather thermodynamic model. The energy consumptions and the total cost were calculated and compared. Cost optimum process parameters were calculated from sensitivity analysis. The vapor recompression process was shown to be both energy and cost optimum. With 20 years calculation period, the cost optimum absorber packing height was 16 meter, optimum temperature approach was 14 K and optimum recompression pressure was 130 kPa. With 10 years calculation period, the optimum values for the same parameters were 16 meter, 17 K and 140 kPa. Calculations of optimum process parameters dependent on factors like the calculation period have not been found in literature. Except from the temperature approach, the optimum values varied only slightly when the calculation period was changed.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81511924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. C. Bandara, R. Thapa, Britt M. E. Moldestad, Marianne S. Eikeland
Fluidization technology is widely used in solid processing industry due to the high efficiency, high heat and mass transfer rate and uniform operating conditions throughout the reactor. Biomass gasification is an emerging renewable energy technology where fluidized bed reactors are more popular compared to fixed bed reactor systems due to their scalability to deliver high throughput. Fluidization of large biomass particles is difficult, and the process is therefore assisted by a bed material with higher density. The combination of different types of particles makes it challenging to predict the fluid-dynamic behavior in the reactor. Computational particle fluid dynamics simulations using the commercial software Barracuda VR were performed to study the fluidization properties for a mixture of particles with different density and size. The density ratio for the two types of particles was six, which is the typical ratio for bed material to biomass in a gasifier. The results from simulations with Barracuda VR regarding bed pressure drop and the minimum fluidization velocity, show good agreement with available experimental data. The deviation between experimental data and simulations are less than 12%. Particle segregation was clearly observed both in the simulations and in the experimental study.
{"title":"Simulation of Particle Segregation in Fluidized Beds","authors":"J. C. Bandara, R. Thapa, Britt M. E. Moldestad, Marianne S. Eikeland","doi":"10.3384/ECP17142991","DOIUrl":"https://doi.org/10.3384/ECP17142991","url":null,"abstract":"Fluidization technology is widely used in solid processing industry due to the high efficiency, high heat and mass transfer rate and uniform operating conditions throughout the reactor. Biomass gasification is an emerging renewable energy technology where fluidized bed reactors are more popular compared to fixed bed reactor systems due to their scalability to deliver high throughput. Fluidization of large biomass particles is difficult, and the process is therefore assisted by a bed material with higher density. The combination of different types of particles makes it challenging to predict the fluid-dynamic behavior in the reactor. Computational particle fluid dynamics simulations using the commercial software Barracuda VR were performed to study the fluidization properties for a mixture of particles with different density and size. The density ratio for the two types of particles was six, which is the typical ratio for bed material to biomass in a gasifier. The results from simulations with Barracuda VR regarding bed pressure drop and the minimum fluidization velocity, show good agreement with available experimental data. The deviation between experimental data and simulations are less than 12%. Particle segregation was clearly observed both in the simulations and in the experimental study.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83840606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
For assessing whether a system model is a good candidate for a particular simulation scenario or choosing the best system model between multiple design alternatives it is important to be able to ev ...
为了评估系统模型是否适合特定的仿真场景，或者在多个设计方案中选择最佳的系统模型，重要的是能够…
{"title":"Powertrain Model Assessment for Different Driving Tasks through Requirement Verification","authors":"Anders F. Andersson, L. Buffoni","doi":"10.3384/ECP17142721","DOIUrl":"https://doi.org/10.3384/ECP17142721","url":null,"abstract":"For assessing whether a system model is a good candidate for a particular simulation scenario or choosing the best system model between multiple design alternatives it is important to be able to ev ...","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77334471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jaroslav Cibulka, P. Mirtaheri, Salman Nazir, D. Manca, Tiina Komulainen
Simulator training with Virtual Reality Simulators deeply engages the operators and improves the learning outcome. The available commercial 3D and Virtual Reality Simulator products range from generic models for laptops to specialized projection rooms with a great variety of different audiovisual, haptic, and sensory effects. However, current virtual reality simulators do not take into account the physical and psychological strain involved in field operators’ work in real process plants. Collaborative training using Extreme Environments Training Simulators could enhance the learning process and provide a more realistic perception of the time and effort needed to carry out demanding operations in Extreme Environments. We suggest developing the following features for an optimal ETS experience and safe learning environment: immersive 3D virtual environments, mixed-reality features, automated assessment, and a monitoring system for the physiological and psychological condition of the trainees.
{"title":"Virtual Reality Simulators in the Process Industry: A Review of Existing Systems and the Way Towards ETS","authors":"Jaroslav Cibulka, P. Mirtaheri, Salman Nazir, D. Manca, Tiina Komulainen","doi":"10.3384/ECP17142495","DOIUrl":"https://doi.org/10.3384/ECP17142495","url":null,"abstract":"Simulator training with Virtual Reality Simulators deeply engages the operators and improves the learning outcome. The available commercial 3D and Virtual Reality Simulator products range from generic models for laptops to specialized projection rooms with a great variety of different audiovisual, haptic, and sensory effects. However, current virtual reality simulators do not take into account the physical and psychological strain involved in field operators’ work in real process plants. Collaborative training using Extreme Environments Training Simulators could enhance the learning process and provide a more realistic perception of the time and effort needed to carry out demanding operations in Extreme Environments. We suggest developing the following features for an optimal ETS experience and safe learning environment: immersive 3D virtual environments, mixed-reality features, automated assessment, and a monitoring system for the physiological and psychological condition of the trainees.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85722767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rand Model Designer is a modern tool for modeling and simulation hierarchical multicomponent event-driven dynamical systems. It utilizes UML-based objectoriented Model Vision Language for designing dynamical and hybrid systems using modification of State Machines, and large-scale multicomponent systems: control systems with “inputs-outputs”, “physical” systems with “contacts-flows”, and novel variable structure component systems, particularly “agent” systems. This article provides a brief overview of the «Object-Oriented Modeling with Rand Model Designer 7» book contents (Kolesov et al., 2016), highlighting the differences between RMD and similar environments.
兰德模型设计器是一个现代工具，用于建模和仿真分层多组件事件驱动的动态系统。它利用基于uml的面向对象的模型视觉语言来设计动态和混合系统，使用状态机的修改，以及大规模的多组件系统:具有“输入-输出”的控制系统，具有“接触-流动”的“物理”系统，以及新颖的变结构组件系统，特别是“代理”系统。本文简要概述了《Rand Model Designer 7的面向对象建模》一书的内容(Kolesov et al.， 2016)，强调了RMD和类似环境之间的差异。
{"title":"Object-Oriented Modeling with Rand Model Designer","authors":"Yury Kolesov, Y. Senichenkov","doi":"10.3384/ECP17142947","DOIUrl":"https://doi.org/10.3384/ECP17142947","url":null,"abstract":"Rand Model Designer is a modern tool for modeling and simulation hierarchical multicomponent event-driven dynamical systems. It utilizes UML-based objectoriented Model Vision Language for designing dynamical and hybrid systems using modification of State Machines, and large-scale multicomponent systems: control systems with “inputs-outputs”, “physical” systems with “contacts-flows”, and novel variable structure component systems, particularly “agent” systems. This article provides a brief overview of the «Object-Oriented Modeling with Rand Model Designer 7» book contents (Kolesov et al., 2016), highlighting the differences between RMD and similar environments.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91100435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Cauchy problem for a stiff system of ODEs is considered. The explicit m-stage first order methods of the Runge-Kutta type are designed with stability domains of intermediate numerical schemes conformed with the stability domain of the basic scheme. Inequalities for accuracy and stability control are obtained. A numerical algorithm based on the firstorder method and the five-stage fourth order Merson method is developed. The algorithm is aimed at solving large-scale systems of ODEs of moderate stiffness with low accuracy. It has been included in the library of solvers of the ISMA simulation environment. Numerical results showing growth of the efficiency are given.
{"title":"Solving Stiff Systems of ODEs by Explicit Methods with Conformed Stability Domains","authors":"A. Novikov, M. V. Rybkov, Y. Shornikov, L. Knaub","doi":"10.3384/ECP17142973","DOIUrl":"https://doi.org/10.3384/ECP17142973","url":null,"abstract":"The Cauchy problem for a stiff system of ODEs is considered. The explicit m-stage first order methods of the Runge-Kutta type are designed with stability domains of intermediate numerical schemes conformed with the stability domain of the basic scheme. Inequalities for accuracy and stability control are obtained. A numerical algorithm based on the firstorder method and the five-stage fourth order Merson method is developed. The algorithm is aimed at solving large-scale systems of ODEs of moderate stiffness with low accuracy. It has been included in the library of solvers of the ISMA simulation environment. Numerical results showing growth of the efficiency are given.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73903433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
PSE S.A. is the sole Transmission System Operator in Poland and, as such, responsible for the provision of reactive power resources for maintaining the voltage within predefined limits. This paper describes the problems associated with the investigation of voltage stability of transmission power grid. Voltage problems are the result of heavy loading of transmission lines and transformers. Voltage instability has been responsible for voltage damage in some parts of Polish Power Transmission System (PPTS) on 26 June 2006. The voltage criteria used for voltage security assessment should require, that the worst bus voltage at post-contingency N-1 and sometimes N-2, must be approximately greater than 0.95 p.u. for generator buses and 0.9 p.u. for others. At the stage of planning, the active power transfer margin may be used as a proximity measure of voltage collapse.
PSE S.A.是波兰唯一的输电系统运营商，因此，负责提供无功功率资源，以将电压维持在预定义的限制范围内。本文介绍了输电网电压稳定性研究中存在的问题。电压问题是输电线路和变压器负荷过重的结果。电压不稳定是2006年6月26日波兰输电系统部分电压损坏的原因。用于电压安全评估的电压标准应要求，事故后N-1和有时N-2的最差母线电压，对于发电机母线必须大约大于0.95 p.u.，对于其他母线必须大于0.9 p.u.。在规划阶段，有功功率转移裕度可用作电压崩溃的接近度量。
{"title":"Voltage Stability Assessment of the Polish Power Transmission System","authors":"R. Lis","doi":"10.3384/ecp17142142","DOIUrl":"https://doi.org/10.3384/ecp17142142","url":null,"abstract":"PSE S.A. is the sole Transmission System Operator in Poland and, as such, responsible for the provision of reactive power resources for maintaining the voltage within predefined limits. This paper describes the problems associated with the investigation of voltage stability of transmission power grid. Voltage problems are the result of heavy loading of transmission lines and transformers. Voltage instability has been responsible for voltage damage in some parts of Polish Power Transmission System (PPTS) on 26 June 2006. The voltage criteria used for voltage security assessment should require, that the worst bus voltage at post-contingency N-1 and sometimes N-2, must be approximately greater than 0.95 p.u. for generator buses and 0.9 p.u. for others. At the stage of planning, the active power transfer margin may be used as a proximity measure of voltage collapse.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72962363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Simulating the Effect of a Class of Sensor Fuzed Munitions for Artillery on a Multiple Target Element System","authors":"H. Kumpulainen, Bernt M. Åkesson","doi":"10.3384/ECP17142221","DOIUrl":"https://doi.org/10.3384/ECP17142221","url":null,"abstract":"","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"39 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72967586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Ferreiro-Cabello, E. Fraile-García, Eduardo Martínez de Pisón-Ascacíbar, E. Jiménez-Macías
Modeling is a useful tool for decision making in the project phases. In the case of reinforced concrete structures, we must be able to locate representative parameters in order to optimize costs. This paper assesses the impact of the column arrangement and building height. The variation of the costs for the foundation and two floor interaxis are discussed. The results are assessed by the ratio of cost per square meter executed. The optimization of the geometry of the building is determined by the interaxis distances and the selected structural thickness. In the case studied the arrangement of the pillars in a 6x6 meters grid using 4 heights offers the best economic results.
{"title":"Evaluation of Structural Costs in Building - Simulation of the Impact of the Height and Column Arrangement","authors":"J. Ferreiro-Cabello, E. Fraile-García, Eduardo Martínez de Pisón-Ascacíbar, E. Jiménez-Macías","doi":"10.3384/ECP1714276","DOIUrl":"https://doi.org/10.3384/ECP1714276","url":null,"abstract":"Modeling is a useful tool for decision making in the project phases. In the case of reinforced concrete structures, we must be able to locate representative parameters in order to optimize costs. This paper assesses the impact of the column arrangement and building height. The variation of the costs for the foundation and two floor interaxis are discussed. The results are assessed by the ratio of cost per square meter executed. The optimization of the geometry of the building is determined by the interaxis distances and the selected structural thickness. In the case studied the arrangement of the pillars in a 6x6 meters grid using 4 heights offers the best economic results.","PeriodicalId":56990,"journal":{"name":"建模与仿真(英文)","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76831975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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