scholarly journals Process Simulation Framework Design and Validation with Grinding Systems

2019 ◽  
Vol 9 (1) ◽  
pp. 2861-2869
Keyword(s):  
Process Simulation ◽  
Simulation Software ◽  
Software Systems ◽  
Simulation Framework ◽  
Simulation Accuracy ◽  
Simulation Performance ◽  
Control Optimization ◽  
Framework Design ◽  
Knowledge Rules ◽  
Intelligent Model

Process Industrial & their complex control operations require comprehensive simulation software systems for modeling plant dynamics and analyzing gaps and to achieve optimal control efficiency. These models support in training plant engineers on various process scenarios in controlled pseudo real time environment. Higher degree of model designing customization, flexibility, scalability, cost efficiency and domain agnostic solution features, are the desired characteristics of any process simulation framework. This paper formulates prototype design of an integrated generic process simulator platform and its components, enabling intuitive and interactive representation of intelligent model formats, facts, knowledge, rules & behaviors. The benefits range from safer process training, analysis / synthesis of controller models; control optimization and theoretical learning. The simulation performance of proposed framework is verified through material fineness control modeling of rotary vertical grinding mill. The adaptive leaning features, with hybrid prediction model validations results in the simulation accuracy and results are compared with prevalent systems.

Modeling of a Steam Turbine Including Partial Arc Admission for Use in a Process Simulation Software Environment

2011 ◽  
Author(s):  
Eric Liese
Keyword(s):  
Steam Turbine ◽  
Process Simulation ◽  
Process Model ◽  
Constant Pressure ◽  
Pressure Ratio ◽  
Simulation Software ◽  
State Variables ◽  
Steam Turbines ◽  
Software Environment ◽  
Last Stage

A dynamic process model of a steam turbine, including partial arc admission operation, is presented. Models were made for the first stage and last stage, with the middle stages presently assumed to have a constant pressure ratio and efficiency. A condenser model is also presented. The paper discusses the function and importance of the steam turbines entrance design and the first stage. The results for steam turbines with a partial arc entrance are shown, and compare well with experimental data available in the literature, in particular, the “valve loop” behavior as the steam flow rate is reduced. This is important to model correctly since it significantly influences the downstream state variables of the steam, and thus the characteristic of the entire steam turbine, e.g., state conditions at extractions, overall turbine flow, and condenser behavior. The importance of the last stage (the stage just upstream of the condenser) in determining the overall flowrate and exhaust conditions to the condenser is described and shown via results.

Simulation on the Web with distributed models and intelligent agents

SIMULATION ◽  
2012 ◽  
Vol 88 (9) ◽  
pp. 1080-1092 ◽  
Author(s):  
András Jávor ◽  
Attila Fűr
Keyword(s):  
Intelligent Agents ◽  
Distributed Simulation ◽  
Simulation System ◽  
Simulation Software ◽  
Software Systems ◽  
Web Based ◽  
Distributed Models ◽  
Adaptive Simulation ◽  
Sample Application ◽  
Great Complexity

Simulation is aimed very often to solve problems of great complexity requiring – beyond using the advanced simulation software tools – platforms that enable the implementation of such software systems. In recent years the concept of cloud computing has emerged and is being applied more and more widely for solving such problems. This paper, beyond delineating the main trends of the development of distributed simulation over a grid, especially over the Internet through Web-based applications, highlights the concepts of service-based simulation system approach. This concept gives the possibility of implementing Web- or cloud agents and other ASP system compliant simulation services based on simulation standards. As a sample application, Fuzzy Web Service is demonstrated as a part of CASSANDRA 4.0 (Cognizant Adaptive Simulation System for Applications in Numerous Different Relevant Areas) that is developed by the McLeod Institute of Simulation Sciences Hungarian Center.

Safety and Efficiency Enhancement in LNG Terminals

2017 ◽  
pp. 1584-1596
Author(s):  
Ravinder Singh ◽  
Helen Huiru Lou
Keyword(s):  
High Risk ◽  
Energy Density ◽  
Natural Gas ◽  
Process Simulation ◽  
Simulation Software ◽  
Liquefied Natural Gas ◽  
Efficiency Enhancement ◽  
Plant Operation ◽  
Aspen Hysys ◽  
Safety Enhancement

Liquefaction of natural gas helps in transporting it over long distances by sea vessels. It is then regasified and transported through pipelines to the consumer. Due to large energy density of Liquefied Natural Gas (LNG), and associated flammability issues, the LNG terminal involves high risk. Consequently, safety is an important factor in the operation of LNG terminals. Although a substantial amount of time money and effort has been put in this area, there is always some possibility of improving the process so that less risk is involved. Rapid advancement in process simulation software like Aspen Plus and Aspen HYSYS, has led to the convenience of experimenting the various control methodologies on the computer offline from the actual plant operation, before they are implemented in real time. In this chapter, main hazards associated with LNG terminal operation will be highlighted. Further, recent advancements in research for safety enhancement and efficiency enhancement in the liquefaction and regasification processes will also be included.

scholarly journals Valorization of OFMSW Digestate-Derived Syngas toward Methanol, Hydrogen, or Electricity: Process Simulation and Carbon Footprint Calculation

Processes ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 526 ◽  
Author(s):  
Aristide Giuliano ◽  
Enrico Catizzone ◽  
Cesare Freda ◽  
Giacinto Cornacchia
Keyword(s):  
Hydrogen Production ◽  
Process Simulation ◽  
Carbon Capture ◽  
Combustion Engine ◽  
Co2 Storage ◽  
Carbon Capture And Storage ◽  
Simulation Software ◽  
Added Value ◽  
Electricity Production ◽  
Methanol Production

This paper explores a possible waste-based economy transition strategy. Digestate from the organic fraction of municipal solid waste (OFMSW) is considered, as well as a low-added value product to be properly valorized. In this regard, air gasification may be used to produce syngas. In this work, the production of methanol, hydrogen, or electricity from digestate-derived syngas was assessed by ChemCAD process simulation software. The process scheme of methanol production comprises the following parts: water gas shift (WGS) with carbon capture and storage units (CCS), methanol synthesis, and methanol purification. In the case of hydrogen production, after WGS-CCS, hydrogen was purified from residual nitrogen by pressure swing absorption (PSA). Finally, for electricity production, the digestate-derived syngas was used as fuel in an internal combustion engine. The main objective of this work is to compare the proposed scenarios in terms of CO2 emission intensity and the effect of CO2 storage. In particular, CCS units were used for methanol or hydrogen production with the aim of obtaining high equilibrium yield toward these products. On the basis of 100 kt/year of digestate, results show that the global CO2 savings were 80, 71, and 69 ktCO2eq/year for electricity, methanol, and hydrogen production, respectively. If carbon storage was considered, savings of about 105 and 99 ktCO2eq/year were achieved with methanol and hydrogen production, respectively. The proposed scenarios may provide an attractive option for transitioning into methanol or hydrogen economy of the future.

The Design and Implementation of Spacecraft Co-Simulation Platform

2012 ◽  
Vol 591-593 ◽  
pp. 174-178
Author(s):  
Hang Yin ◽  
Yong Ming Gao ◽  
Chao Wang ◽  
Xin Xing Li
Keyword(s):  
Continuous Improvement ◽  
Simulation Analysis ◽  
Simulation System ◽  
Simulation Software ◽  
Simulation Framework ◽  
Simulation Technology ◽  
Spacecraft Dynamics ◽  
Design And Implementation ◽  
Complex Simulation ◽  
Analysis System

With the continuous improvement of complexity in the space simulation system and the enhancement of multi-technology integration, the co-simulation technology is an important way to solve complex simulation problems in the big system. After analysis of relative theories and main methods of co-simulation, collaboration data interfaces among multiple software are improved and matched with a number of simulation software system. The co-simulation framework is designed and a set of spacecraft dynamics co-simulation analysis system is established on the frame of HLA / RTI and on the principle of co-simulation technology. The key task on orbit service of the spacecraft is modeled and simulated. The software can complete the work that a single simulation software could not be done and achieve good results.

scholarly journals Techno-Economic Implications of Fed-Batch Enzymatic Hydrolysis

Processes ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. 847 ◽  
Author(s):  
Ellen Argo ◽  
Deepak R. Keshwani
Keyword(s):  
Enzymatic Hydrolysis ◽  
Ethanol Production ◽  
Process Simulation ◽  
Cellulosic Ethanol ◽  
Production Cost ◽  
Simulation Software ◽  
Labor Costs ◽  
Fed Batch ◽  
Capital Costs ◽  
Plant Capacity

Fed-batch enzymatic hydrolysis has the potential to improve the overall process of converting cellulosic biomass into ethanol. This paper utilizes a process simulation approach to identify and quantify techno-economic differences between batch and fed-batch enzymatic hydrolysis in cellulosic ethanol production. The entire process of converting corn stover into ethanol was simulated using SuperPro Designer simulation software. The analysis was conducted for a plant capacity of 2000 metric tons of dry biomass per day. A literature review was used to identify baseline parameters for the process. The sensitivity of the ethanol production cost to changes in sugar conversion efficiency, plant capacity, biomass cost, power cost, labor cost, and enzyme cost was evaluated using the process simulation. For the base scenario, the ethanol unit production cost was approximately $0.10/gallon lower for fed-batch hydrolysis. The greatest differences were seen in facilities costs, labor costs, and capital costs. Using a fed-batch operation decreased facilities costs by 41%, labor costs by 21%, and capital costs by 15%. The sensitivity analysis found that cost of biomass had the greatest effect on ethanol production cost, and in general, the results support the proposition that fed-batch enzymatic hydrolysis does improve the techno-economics of cellulosic ethanol production.

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