I am working on the project of modelling and simulation of high ash coal gasification using aspen plus. I have modelling equations for entrained bed gasifier and fluidised bed gasifier. but i donot know how to nest these equations in aspen plus using external subroutines. No information is available on aspen tutorial about.
Plz help??
http://www.ingentaconnect.com/content/jccs/jccs/2012/00000037/a00101s1/art00030
Article ASPEN plus modelling of air–steam gasification of biomass wi...
https://www.tandfonline.com/doi/abs/10.1080/10916466.2016.1255642?src=recsys&journalCode=lpet20
http://www.eng-tips.com/viewthread.cfm?qid=399036
How often to call the external subroutine is a matter of personal choice for the programmer but I don't like jumping back and forth between two programs very often and I'm not sure it is actually necessary. But if you insist you can populate a table to interpolate and then repopulate it with as needed with a narrower range to improve accuracy.
A fluidized bed reactor acts a lot like a CSTR (Continuous Stirred Tank Reactor) you need to converge on the tank composition and temperature which is also the effluent composition. Sometimes a fluidized bed reactor isn't actually as well mixed as desired if this is the case with your system but you can divide it into zones that may have slightly different conditions.
An entrained bed is more like a Plug Flow reactor which you divide into slices and calculate the reaction rate of each slice. The slices won't be completely isothermal but the inlet and outlet temperatures should be close. You know you have enough slices when you can double the no of slices and still get the same result.
FYI I have attached a link comparing pilot plant scale CSTR and fixed bed reactors.
http://www.gastechnology.org/tcbiomass/tcb2015/Gaston_Katherine-Presentation-tcbiomass2015.pdf
thanx hamit and rick for valuable information
I have modelling equation and I want to use those equation in aspen plus for designing fluidised/entrained flow bed gasifier. how can I incorporate these equations in aspen plus?/
I have attached one paper in which external subroutine was used but how they did it?? I want to know that procedure.
I have not used Aspen Plus in a very long time. I am more familiar with the Hysys model that have "third pary modules" that allow calling an external fortran or other program . I assume Aspen Plus has a very similar functionality. Or you can use internal spreadsheet models to preform the same calculation in the Aspen environment
Hello,
I have used the kinetic model in my work "coal gasification'. I have used comprises of all kinetic with ".dll" extension. You can see this file in Aspen Example Simulations.
Thanks,
hello syed
i am not able to find dll extension file in aspen plus.
Can you plz tell me how to search it??
Did you find a solution?
I have the same problem in this moment. I need to simulate a fluidized bed gasifier for biomass gasification
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