CAPE-OPEN

Thanks as always Jasper. I'm still fiddling with the reactor. Is there a way for the reaction to generate pressure in the reactor? The reaction is exothermic, and generates gaseous products, so with suitable valving the reactor should self-pressurize. Does this require a custom valve? Or am I settin...

Update: I should have searched more for "solids" before posting. I successfully updated the database. However, I'm having trouble actually running the reaction. It's a three phase reaction, which one should I choose? In one of the example flowsheets BTG_Pyrolysis, it used "Overall&quo...

Hello,
I'd like to model a water-aluminum reaction where the aluminum is a solid, water a liquid.
The reaction is:
2Al+6H2O-->2Al(OH)3+3H2 (dH=-835kJ)
Is there a good way to add aluminum as a reactant, and aluminum hydroxide as a product?

Has anyone out there tried to model a FT reactor? The output is a spectrum of hydrocarbons of the form CnH2n so the kinetics are basically probabilistic chain growth with CH2 building blocks. Any suggestions are welcome.

By "heat loss to the surroundings" I mean heat transfer from the shell of the device to the ambient environment. That is, a compressor will heat the room that it's in - Q/T. I only ask because I'd like a clean way to calculate the entropy generation from all devices. At the moment, I can d...

I was hoping to calculate heat transfer from a compressor to the surroundings, or at least add it using an (negative) energy stream. I'm just trying to determine total entropy generation from a device: Sgen = m(se-si)-Q/T. Being able to add some heat transfer to the surroundings changes conditions w...

Hello,

I'd like to prescribe heat loss from a compressor or turbine. Is there a way to add a negative energy stream from the compressor or turbine?

On a related note, is there a way to find heat loss to the environment from a compressor, or other unit given a solved flowsheet?

Thanks,

Eric

Hi Jasper, I've been using the parametric study feature to analyze the sensitivity of parameters. However, it appears to give inconsistent results. For example, if I vary the heat transfer coefficient on my reactor from 0 to 2 W/m^2K, and output the volumetric flow rate through the reactor, the answ...

Hi Jasper, I have a quick question (I hope). I'd like to run a parametric study in which I vary the operating pressure of the NH3 synthesis loop. However, the loop contains both a feed compressor, and a recycle compressor. Thus, if I vary only the recycle, then it's not representative of a real plan...

Thanks for the advice, Jasper. Indeed, you appear to be correct - the kinetics were wrong. I'm not sure exactly what's going on, except that the PDF that I provided might have had the wrong reaction units, given as kmolNH3/(kgcat*hr). Since COCO requires mol/(sec*kgcat) I added a conversion factor o...