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Archives :: Software, Automation & Control :: Information technology :: Design, Simulation & Modeling

Displaying 81 - 100 of 120 stories.
February 16, 2009
Invensys Process Systems (IPS; Plano, Tex.; www.ips.invensys.com) has released the newest version of SimSci-Esscor’s HEXTRAN software, a comprehensive heat transfer and pinch analysis tool. In addition to the numerous infrastructure upgrades and enhancements that address the emerging needs of clients seeking cost-effective and efficient heat transfer, HEXTRAN 9.2 simulation software can now be used...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Invensys-Process-Systems-unveils-HEXTRAN-9-2_4553.html
February 13, 2009
For safe operation of a flange joint, it is important to consider a number of parameters that have an impact on the bolts, gasket and flanges. The relatively large number of mathematical...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Flange-joint-software-for-calculation-and-simulation_4544.html
December 1, 2008
Engineers often need to fit experimental data to an empirical relationship for extrapolation or modeling without resorting to a full mathematical treatment based on physical principles or theory. The most widely used platform in science for doing this is MS Excel, and while its "off-the-shelf" Trendline tool is useful, it is limited to only 4 or 5 simple functions. Excel’s Solver add-in, on...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Engineering-Practice-Functions-for-Easier-Curve-Fitting_4387.html
November 1, 2008
Process modeling has progressed from the "molecule accounting" of steady-state flowsheeting packages to become a central platform for capturing and deploying chemical process industries’ (CPI) intellectual property (IP). Systematic modeling has moved center stage to help companies differentiate themselves from their competitors while also providing a set of tools with which it is possible...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Cover-Story-Process-Modeling-Moves-Center-Stage_4317.html
September 15, 2008
Each compressed air system is typically composed of one or more compressors with a power source, control system, intake air filter, after cooler and separator, air receiver, air dryer, interconnecting piping and a distribution system to deliver air to points of application. Because the air leaving the compressor is generally saturated, any reduction in temperature will cause water to begin condensing...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Engineering-Practice-Predicting-Water-Content-of-Compressed-Air_4174.html
September 15, 2008
There are many criteria that the engineer considers when optimizing: maximization of product yield or quality; minimization of recycle flow or energy consumption; and economic indicators, such as maximization of profits, net present worth (NPW) and minimization of payback period (PBP). Instead of simply focusing on the most important criterion, it would be preferable to optimize the process for several...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Engineering-Practice-Optimize-your-Process-Plant-for-More-than-One-Objective_4175.html
August 15, 2008
The continuing growth in the importance of chemical processing, including oil-and-gas processing, increases the need to understand prediction methods for chemical properties and chatacteristics and the impact that these properties have on unit operations, process simulation and design. A variety of mathematical relationships have been developed to predict chemical compound characteristics. Though some of...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Engineering-Practice-Predicting-Physical-Properties-of-Hydrocarbon-Compounds_4089.html
June 15, 2008
An automated spreadsheet method can quickly help minimize fresh hydrogen consumption while maximizing hydrogen recovery and reuse in petroleum refineries and petrochemical complexes In petroleum refineries and petrochemical complexes, there are many hydrogen consumers, such as hydrotreaters, hydrocrackers, isomerization units and lubricant plants. There are also hydrogen producers, such as hydrogen plants...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Engineering-Practice-Hydrogen-Pinch-Analysis-Made-Easy_3972.html
March 15, 2008
The behavior of many different phenomena can be modeled by systems of ordinary differential equations (ODEs), but most ODEs cannot be solved analytically, in which case an approximation to the solution is found by applying numerical integration methods. Dutch-sponsored mathematician Valeriu Savcenco has developed new "multirate" numerical methods that can significantly reduce the CPU time and...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Chementator-New-methods-for-solving-differential-equations_3742.html
March 11, 2008
PSE Korea, the Korean subsidiary of Process Systems Enterprise (PSE; London, U.K.; www.psenterprise.com), providers of the leading gPROMS advanced-process modeling (APM) software and related services, was officially declared open on 5 March 2008 at the PSE Korea Opening Ceremony in Daejeon, Korea. Speaking at the event, attended by some 70 delegates from Korean industry, research organizations and...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/PSE-Korea-officially-open_3734.html
December 15, 2007
Although current process simulators contain an extensive library of thermodynamic models and unit operations, they do not contain many new, complicated, or lesser known models. For many companies, particularly those in the petrochemical refining industry, it is very important to have access to new models that are not yet available in common process simulators like AspenPlus or Hysys. For that reason, an...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Engineering-Practice-CAPE-Open-An-International-Standard-for-Process-Simulation_3561.html
November 15, 2007
Liquid density is important to engineers throughout the chemical process industries (CPI). Knowledge of liquid density is required in the design of storage vessels. In hazard analysis, knowledge of liquid density is required in the design of the relief valves to protect the system. In vapor-liquid operations, such as distillation, knowledge of liquid density is required to determine column diameter. For...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Liquid-Density-Of-the-Elements_3497.html
November 15, 2007
Make a leak-free seal, even for irregular flanges The proprietary Multi-Swell gasket material (photo) is said to be the world’s first self-loading, general-service gasket. The material creates its own load when it comes into contact with oil or water, which virtually eliminates the most common cause of gasket failure — insufficient load. The material performs equally well in water or oil, does...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Focus-On-Pipes-and-Fittings_3522.html
August 1, 2007
    In multicomponent systems, equation-of-state (EOS) methods generally do a good job of determining vapor-phase properties. But accurate determination of properties for the liquid phase is much more difficult, especially when the liquid contains dissimilar molecules, polar molecules such as alcohols and glycols, or acid gasses such as H2S and CO2.   In this article, a multicomponent system...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/VLE-Calculations-in-Multicomponent-Systems_3138.html
August 1, 2007
Computer models that simulate the operation of jet engines with alternative fuels will be developed by Reaction Design (San Diego, Calif.; edlinks.che.com/6898-532) under a two-year contract with the National Aeronautics and Space Administration (NASA; Glenn Research Center). The...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Combustion-models-for-alternative-fuels_3297.html
August 1, 2007
    Gone are the days of one-size-fits-all engineering software packages. Today, solution providers offer versions with improved integration for advanced data sharing and simplified user interfaces with the ability to multitask between the design house and the plant floor, bringing the power of engineering software to everyone from trained experts to software novices who just want to run a few...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Engineering-Software-Makes-the-Leap-From-the-Masters-to-the-Masses_3330.html
May 1, 2007
    Spreadsheets have been around almost as long as personal computers. While early versions were clumsy and limited in scope, today’s spreadsheet programs can do almost anything the user wants them to do. These broadened capabilities are made easier through the use of internal (built-in) functions, add-in programs and the use of macro programming. In this article, we explore how...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Using-Spreadsheets-As-Curve-Fitting-Tools_3133.html
May 1, 2007
    A detailed follow up of the cations present in the wastewater of the Monsanto Europe site in Antwerp, Belgium, has led to an increased understanding of changing wastewater treatment plant performance. The chemical process industries' (CPI) other wastewater treatment plants that handle continuously changing mixtures of different manufacturing plant effluents should also consider routine...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Monitor-Cations-in-CPI-Wastewater-for-Better-Performance_3146.html
April 1, 2007
It's a simple matter of fact: a chemical process plant operates by the products and services of numerous - and, unavoidably, competing - vendors. Since the resulting compatibility issues only hamper productivity, vendors, EPC firms and owner/operators alike tried to put their differences aside to address interoperability, at this year's DaratechPlant (Houston; January 29-31; daratech.com). Standardization...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Uniting-on-interoperability_3335.html
March 1, 2007
Until now, creating a set of "as-built" plant drawings meant either laser-scanning the outline of an entire piping system, or measuring all the components manually. By paring Leica Geosystem's in-field-to-model laser technology with Coade's CADWorx Plant Design Suite, Coade, Inc. (Houston, Tex.; edlinks.che.com/6893-534) has reduced the time required by more than 50%, says Vornel Walker, Coade's manager...
http://www.che.com/software_automation_and_control/information_technology/design_simulation_and_modeling/Create-as-built-drawings-in-half-the-time_3215.html
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