Vba For Chemcad
. Move your mouse to the bottom-right corner of the desktop, you will be able to activate the Win8 side menu. Click on Settings, select Control Panel, click Uninstall a program. Find out and highlight VBA for CHEMCAD on the list of installed programs. Click on Uninstall on the top, and you will start the default uninstall process.
Following the removing instruction to finish the removal. Restart the computer after the removalHow to remove certain program in Windows 8 OSIf you are Windows 7 users. United States.
41.67%. India. 16.67%. Iran. 16.67%.
Austria. 8.33%. Germany. 8.33%. Japan.
8.33%How to handle and clean VBA for CHEMCAD program leftoversProblems with leftovers: it is not always an easy task to uninstall VBA for CHEMCAD completely on the computer, the program’s attached uninstall process usually unable to clean those stubborn installed file and registry entries thoroughly. And in particular, let along those installed folder, files, and cache files., many related registry entries which created during the installation of the program exist on the system registry database are always ignored by the default removing process. And manual finding and removing all of these leftovers is a daunting task for many common computer users, for that they have to check a great number of folders and registry database to remove the associated files completely, and any small mistake could cause further and more serious problems on the system! Especially the important and sensitive system registry database. So be cautious! Unless you have a well knowledge and understanding about your computer system, it is not recommended to remove VBA for CHEMCAD in this way.Resolution: employ a professional third party VBA for CHEMCAD uninstall tool on your PC, it will help you to scan all of VBA for CHEMCAD related files, and remove them completely and correctly to avoid any further problem. You can get the uninstaller via clicking the below button.
As students, we learned McCabe-Thiele diagrams and shortcut methods to solve simple distillation systems. Often, a little more complexity was added using a spreadsheet to solve harder problems. Then, of course, we were given access to a simulation program which used more rigorous methods, including simultaneous correction and/or inside-out algorithms. When it came to actual columns in the field, however, they didn't always achieve quite what the equilibrium-stage based calculations predicted. You could specify an overall efficiency or even stage-by-stage efficiency profiles to get a better match, but this was a crude way of dealing with the issue.Enter mass-transfer models, like Bravo & Fair for random packing, Bravo, Rocha & Fair for structured packing, and Billet & Schultes for random or structured packing.
Vba For Chemcad Training
Quick, what's the bubble point of the process stream entering one of your columns? What's the viscosity of the stream entering your heat exchanger? You may find yourself needing answers to these types of questions much more often than needing to model an entire process, and we've made it easy to access these calculations in CHEMCAD.If you have an existing flowsheet with a stream already set up with the right composition, just double-click the stream, and you can immediately calculate bubble/dew point (T or P) or vapor fractions. Just remember Gibbs' phase rule and specify two of the three available fields (T, P, VF); then click the Flash button and you'll have your answer. Someone recently forwarded me a link to ExxonMobil's perspectives blog on the subject of engineers in the United States. You can take a look to see Ken Cohen's take on addressing the need to educate and connect with young people about engineering and engineers-especially the societal impact, both past and present, of our profession.As I pointed out several years ago, there are a couple of ways to attack this problem. ExxonMobil's site, and their associated television commercials are a fantastic 'top-down' approach to get the message out to the general public.
Worrying about a license for your process simulator is probably not how you want to spend your time. CHEMCAD has both the modified NRTL and Pitzer thermodynamic systems built right in. They are available for calculation in any unit operation, including distillation columns. With mNRTL, you can run in apparent species or true species modes (we have a great discussion on the pros & cons of each in our help system, and we'd be happy to go over it with you). Do you have an existing vessel reactor in your process? Often, we hear from customers that they have an existing operating procedure, but they aren't sure exactly how much time the reaction actually requires.Maybe you have a basic reaction analysis from an R&D group that requires scale-up from the lab to a full-scale vessel reactor. Your process (or process design) is probably not fully optimized. Of course, you know that, and you own a simulator to improve your process. For example, you may make a relatively simple calculation like finding the optimal feed tray location in a distillation column.In our training courses, we teach a simple method of using CHEMCAD's sensitivity analysis to vary feed tray location while measuring reboiler duty, and we've heard back from a number of you who've achieved significant savings from doing just that.
But did you know that you can have CHEMCAD do the work for you? This is not only possible, but also very straightforward.Included with CHEMCAD is an optimizer (using General Reduced Gradient, Successive Quadratic Programming, or SimultaneousModular SQP routines) that allows you to define an objective function and tell the program which variables it can adjust in order to find the optimum (min/max). After just a few clicks, you'll have your solution.Now let's go even further: many dedicated optimization engines allow 'multi-variable' optimization, but you don't need to look beyond the software you already have.An easy-to-understand example is a CAPEX/OPEX calculation, designed to find the optimal allocation of resources over a given period of time. Using CHEMCAD's cost algorithms, you can get a total equipment cost and an operating cost (energy, utilities, feeds, etc.), which can all be fed to an Excel(TM) spreadsheet using CHEMCAD's Data Map. Another approach to calculating the CAPEX and OPEX values and ratio would be to write a routine in CHEMCAD's Visual Basic for Applications (VBA) tool. The ratio is then available as your objective function in the optimizer.We told you money was hiding in your process-isn't it time you went out and got it?To find out more, get in touch with our sales or support representatives. Happy optimizing! Imagine you're a plant engineer and are asked to find a way to improve throughput.
Can your existing heat exchangers handle the increased flow? You can use CC-THERM in Rating mode to enter specifications for the existing exchanger (TEMA type, # of tubes, baffles, etc.) and get the flows, temperatures, and pressures to match current conditions. Then increase the flow in the model to see if you exceed any constraints on the exchanger.Suppose there's a concern with fouling in a particular stream.
You can switch to Fouling Rating mode in CC-THERM to calculate the fouling rate that allows the model to fit reality. Then increase the flow in the model as before, to determine whether the existing exchanger will be sufficient.Is the exchanger you have not big enough to handle the increased throughput? You can use CC-THERM in Design mode to design a replacement exchanger. Use the specifications of the existing exchanger to create your initial estimates, since you know these specs are close to your requirements. Now you can approach your heat exchanger manufacturers with a much clearer picture of what you need and what their proposed design should look like.CC-THERM is available as a stand-alone product or as an add-on to your existing CHEMCAD package. Please contact us at 1-800-CHEMCAD for more details! Cooling water.
Thermal fluids. Almost every facilityhas them, and they can represent a great opportunity to improve your processes’efficiency and reduce costs. Knowing if your equipment (pumps, compressors, cooling towers, heat exchangers, piping, etc.) is properly sized andyour maintenance regimen (water treatment, equipment cleaning, etc.) is properly timed can represent both capital and operatingcost improvements.
This topic is covered in some detail in our trainingcourses, and I’ve seen the “idea bulb” above trainees' heads when they realizethe ease with which they can chase down significant process improvements. One example we cover is the use of a distillation columnUnitOp to model a cooling tower. You can add as much or as little complexity tothe simulation as you like, and in our training course, we even go into detailssuch as aqueous electrolytes and blowdown. We’ve also helped customers withmodels of incredibly extensive piping networks that deliver steam and coolingwater throughout large facilities. Again, depending on your needs, the level of detail can vary, but we’ve seeneverything from simple heat and material balances all the way to rigorouspiping pressure-drop calculations, control valves, dynamic response, and evenreverse flow (more on reverse flow and hydraulic balancing in a future posthere-stay tuned). Because CHEMCAD is an OPC Server, it appears to OPC Clients as a data source, just like plantsensors, control valves, and so forth.
You don't need a multi-headed piece of middleware to connect CHEMCAD to your SCADA system, and because of our system design,an OPC Client can easily push data into CHEMCAD, tell CHEMCAD to run steady state, run one time step, or evenrun dynamically, and pull results from CHEMCAD, all through the OPC interface.You'll need to spend a little more effort to ensure that you have a validated model of your process (the simulation matches your plant performance within a tolerance you're comfortable with, and it reacts to process changes correctly). Many of you already go to this level of detail with your 'offline' use of simulation software. You can build a virtual plant inCHEMCAD and connect it to a SCADA system for control system checkout oroperator training (OTS). You can even connect it to a SCADA system that's alsoconnected to your operating facility, to compare simulated (as designed) v aluesto actual performance (PPM), using either a steady-state ora dynamic simulation.Imagine having alarms built into your SCADA system that can alert operations staff to deviations in plant performance versus design specifications! There are even installations of advanced process control (APC) using rigorous CHEMCAD simulations to improve process efficiency by linking SCADA systems, simulations, and economic optimization engines. When I first got into the process simulation business 20years ago, software was used in a slightly different way than it is today,mostly owing to the speed of computing and available software development toolsback then. Large simulations took a long time to run—often they were left torun overnight.
(Those of you who remember coming into the office in the morningonly to find that your simulation failed to converge sometime after midnight, Isympathize!) Also, because of the perceived complexity of the software, simulationswere often run only by in-house experts. Let me get back to the point: process simulation hasdeveloped a wealth of features beyond simple heat and material balancecalculation, yet we find most users only use about 20% of the power availableto them. Some of this is due to the complexity of features; if you think of theadditional equipment geometry data required to run a rigorous dynamicsimulation, it’s often regarded as “too much effort,” despite the potential benefit!
Other times, users simply don’trealize that a feature is available. CHEMCAD has a wealth of features and powerjust hidden from view—in some cases on purpose, as we strive to keep complexityfrom hindering your day-to-day workflow.
