Thank you for the wonderful vedio! I have a confusion at 16:09, the calculation of the fractional conversion of H2O. [H2O conversion (about 0.09) X MW of H2O (18.015)]/[0.65*900] should be near 0.00275, but the result shows 2.75. Even if the value was expressed as percentage, it would be 0.275. I cannot understand what happend.
Great video, If I integrate this electrolyte system with the gasification process, then the suggested ELECNRTL equation of states may not be useful. Can you please suggest a better method for the combined process model?
Hello sir thanks for the great video How to find the water required for the process.any formula for it.and why too much water is coming out from the cell stack? If i want to produce 1 kg/s instead of 0.17 kg /s hydrogen how much water will it require
Just to note that the hydrogen production formula should also include the Faradaic efficiency efa_F. The right formula is nH2= eta_F*N*I/(zF)=eta_F*Pcell/(Vcell *zF).
Thank you for your comment. You're right. The formula is written in the cited paper. In my videos I often don't consider all the details of the papers because of the lack of time...
Hello, thanks for the video! If I want to produce more hydrogen (a lot more), should I increase only the number of cells? Or should I do something different, like working at an higher current density?
Hi there, I observed your calculation of the fractional conversion of water in the Excel file. There, you divide the mass flow of water per hour, by 0.65*900. What is this fractional mass flow you divide it by?
Have you noticed that if you change the number of cells ( that causes a change in power of stack) the simulation throws an error? I want to use the simulation for a project but I can't change the power of the stack because the simulation throws en error. What do you think may be de reason?
Great video. I read the original paper, and the authors have used Aspen Custom Modeler to simulate the stack. At least, that paper is peer-reviewed. How do you know for sure that modeling the electrolysis stack using the R-stoic is correct? How do you ensure the accuracy and appropriateness of your method? Please let me know, thanks.
Hi, thank you. I did not write anywhere that I simulated the model from the paper you mentioned. I wrote in the presentation that the video proposes a model of an alkaline electrolysis system.
@@alexrider606 You're welcome. The equations I used in this video are from the two publications I cited. If you want to check the accuracy of the equations, you should do a literature search. For further questions, do not hesitate to write to me.
how when we change the alkaline electrolyzer with a proton exchange membrane electrolysis cell (PEMEC)? what are we should be changed in a simulation? thank you
In case you need further hydrogen Simulink models (ready to run) (i.e. a complete hydrogen storage station, PEM components, Fuel Cells, Electrolysers etc.) feel free to reach our channel out via our mail!
Hey, super good video! However I've been attempting to remake this in aspen plus v12 and am running into issues around the reactor as it is not converging. It also is not acknowledging the input heat duty, do you have any insights on this?
I really do not understand the whole deal with the conversion rate being so low and a lot of water being recycled. I checked both papers you have provided but I could not find anything there either. Could you explain how I have to choose the water flow rate for a given production volume? Is it that I arbitrarily choose a flowrate and calculate the conversion rate according to that?
Hey nice video, i was wondering if its possible to get a (Temperature, salt-concentration, conductivity) Graph/table from Aspen when running an electrolysis system
You're welcome. I want to upload more videos about electrolysis technologies and fuel cells in future. I'll add your points to the list of videos I plan to make.
Thanks for sharing. I have simulated the electrolysis as you did, but in the results the O2-out stream exiting the separator is in the liquid from, so using the following Flash2 cant separate the O2 from the liquid, Also the heat from the separator is positive for me while it is negative in your simulation. Could you please help me how to solve the problem?
Unfortunately I don't know. The model is from the paper www.sciencedirect.com/science/article/pii/S0360319902000332 Hopefully you will find the application areas of the model in the publication.
Inputting 900kg/h of H2O and only getting 0.19kg/h of H2, this seems like a very low output for H2, is this what one would see with normal alkaline electrolysis?
Please see the data source for this video: Monica Sanchez, Ernesto Amores, David Abad, Lourdes Rodriguez, Carmen Clemente-Jul. Aspen Plus model of an alkaline electrolysis system for hydrogen production. international journal of hydrogen energy. 45. 2020.
Thank you for the wonderful vedio! I have a confusion at 16:09, the calculation of the fractional conversion of H2O. [H2O conversion (about 0.09) X MW of H2O (18.015)]/[0.65*900] should be near 0.00275, but the result shows 2.75. Even if the value was expressed as percentage, it would be 0.275. I cannot understand what happend.
Oh...... I got the answer at 39:27, Thanks
Great video, If I integrate this electrolyte system with the gasification process, then the suggested ELECNRTL equation of states may not be useful. Can you please suggest a better method for the combined process model?
Hello sir thanks for the great video
How to find the water required for the process.any formula for it.and why too much water is coming out from the cell stack?
If i want to produce 1 kg/s instead of 0.17 kg /s hydrogen how much water will it require
You're welcome.
Please see the publications I cited.
Can you please guide how to increase the production rate?
hello , i am wondering why did you stopped the recording three times and start again ?
Just to note that the hydrogen production formula should also include the Faradaic efficiency efa_F. The right formula is nH2= eta_F*N*I/(zF)=eta_F*Pcell/(Vcell *zF).
Thank you for your comment. You're right. The formula is written in the cited paper. In my videos I often don't consider all the details of the papers because of the lack of time...
@@kgengineeringsolutions can you please share the paper name
@@hamzasethi9557 The DOI of the papers are mentioned at the beginning of the video
hello sir, while you are calculating Vcell ,why you used current density insted of current ? thank you
Hi, I made the video a long time ago. Please see the paper I cited.
Is this unit is a part of chlor alkali plant???
Hello, thanks for the video! If I want to produce more hydrogen (a lot more), should I increase only the number of cells? Or should I do something different, like working at an higher current density?
You can also increase cell area...
Can you please tell me how to increase cell area ? I would like to produce more H2 too . Thanks .
Great video please make sure not to add any music else I like it alot
Hi there, I observed your calculation of the fractional conversion of water in the Excel file. There, you divide the mass flow of water per hour, by 0.65*900. What is this fractional mass flow you divide it by?
Hi, 0.65: mass fraction of H2O. 900: mass flow of KOH-H2O
hi. sry I did not get why the simulation is done many times ? what is the main difference between them?
Hi, where in the video was the simulation done many times?
What is HHVML - 0 J/kmol that is used to compute the chemical energy of hydrogen?
Please write me the sequence in which 0 J/kmol is used
Have you noticed that if you change the number of cells ( that causes a change in power of stack) the simulation throws an error?
I want to use the simulation for a project but I can't change the power of the stack because the simulation throws en error. What do you think may be de reason?
That's strange. I do not know why.
Great video. I read the original paper, and the authors have used Aspen Custom Modeler to simulate the stack. At least, that paper is peer-reviewed. How do you know for sure that modeling the electrolysis stack using the R-stoic is correct? How do you ensure the accuracy and appropriateness of your method? Please let me know, thanks.
Hi, thank you.
I did not write anywhere that I simulated the model from the paper you mentioned. I wrote in the presentation that the video proposes a model of an alkaline electrolysis system.
@@kgengineeringsolutions Thanks for the reply. Can you let me know how you ensured the accuracy of the model you proposed?
@@alexrider606 You're welcome.
The equations I used in this video are from the two publications I cited. If you want to check the accuracy of the equations, you should do a literature search. For further questions, do not hesitate to write to me.
how when we change the alkaline electrolyzer with a proton exchange membrane electrolysis cell (PEMEC)? what are we should be changed in a simulation? thank you
I think, a lot. PEMEC behaves completely differently than alkaline elektroyzer
In case you need further hydrogen Simulink models (ready to run)
(i.e. a complete hydrogen storage station, PEM components, Fuel Cells, Electrolysers etc.)
feel free to reach our channel out via our mail!
Hi Mochamad, please do you have a simulation example of PEMFC in Aspen plus?
@@dohaelrhoul3849please share if you got
Hey, super good video! However I've been attempting to remake this in aspen plus v12 and am running into issues around the reactor as it is not converging. It also is not acknowledging the input heat duty, do you have any insights on this?
Hi, thank you.
Unfortunately, I don't know what the problem could be. Sorry for the non-positive answer.
@KG Engineering Solutions what value you have put for fractional conversion of H2O?
Please see the video.
@@kgengineeringsolutionsin the video it is about 2.75, but it should be 0 to 1 as per aspen's criteria
@@meditations5390 at what time sequence?
I really do not understand the whole deal with the conversion rate being so low and a lot of water being recycled. I checked both papers you have provided but I could not find anything there either. Could you explain how I have to choose the water flow rate for a given production volume? Is it that I arbitrarily choose a flowrate and calculate the conversion rate according to that?
The video is based on the paper doi.org/10.1016/j.ijhydene.2019.12.027 . Please contact the authors of the mentioned paper.
@@kgengineeringsolutions Okay, I will. Thank you very much. Your videos have been very helpful.
Great video, could this be performed with a two outlet flash separator instead of a component separator?
You're welcome
how would you separate o2 and h2?
Can you please explain to me, why this simulation is divided into 3 parts?
what do you mean by three parts?
I want to simulate it for sofc electrolyzer
hello sir, for fractional conversion of H2O ,what is value of it ?
Hello, 0.002757607 as mentioned in video
sir can you give me example to simulate green ammonia from H2 alkaline electrolysis and N2 ASU?
Hey nice video, i was wondering if its possible to get a (Temperature, salt-concentration, conductivity) Graph/table from Aspen when running an electrolysis system
You're welcome. I want to upload more videos about electrolysis technologies and fuel cells in future. I'll add your points to the list of videos I plan to make.
Thanks for sharing. I have simulated the electrolysis as you did, but in the results the O2-out stream exiting the separator is in the liquid from, so using the following Flash2 cant separate the O2 from the liquid, Also the heat from the separator is positive for me while it is negative in your simulation. Could you please help me how to solve the problem?
Can you send me your simulation? It is easier to check the problem
Hey thank you very much for the video, can you please HELP me i am having exactly same problem
@@kgengineeringsolutions thanks for your kind. I installed a higher version of aspen and the problem solved.
@@baeisavi thanks for your swift reply, what is the version of Aspen Plus you installed
@@rahmatqambari4939 your welcome. v14
thanks for sharing. could we apply the same method to simulate NACL electrolysis for the production of hydrogen (chlor-alkali process)?
Unfortunately I don't know. The model is from the paper www.sciencedirect.com/science/article/pii/S0360319902000332
Hopefully you will find the application areas of the model in the publication.
what is the value of fractional conversion of H20
It is small because one circulates the alkaline solution.
What does the error "TERMINAL ERROR
ACCOUNT-INFO PARAGRAPH MUST BE SUPPLIED" mean?
Unfortunately I don't know. Perhaps you can ask in an Aspen Plus forum.
Inputting 900kg/h of H2O and only getting 0.19kg/h of H2, this seems like a very low output for H2, is this what one would see with normal alkaline electrolysis?
Hm the H2O feed (water deficit) is 1.69 kg/h
Where can where can Idowenload simulation file ?
please i need exampl for Aspen Plus model of electrolysis system for hydrogen production by wind
I added the subject to the list of future videos. Unfortunately, I can't say when I'll find time for the video.
Did you got it?
Hello;
How add new model thermodynamic in aspen plus like Redlich-kister model?regards
Hello, unfortunately we don't know at the moment. Best regards
Thank you.
How can the electrical energy produced from a system, be converted into electrolysis to produce hydrogen?
If the question is related to electrochemistry. I would recommend looking up a book that highlights electrolysis for water electrolysis.
Why have you used r-stoic reactor as cell stack?
As far as I know, one can't simulate a stack in Aspen Plus.
😃Where can I download the simulation file?
Send me your email address
@@kgengineeringsolutions could you send me too?
@@AtifKhan-zi2ut how?
@@kgengineeringsolutions can you send also the file
why h2 production and H20 conversion are same
An H2 molecule is formed from an H2O molecule
Thanks best vidoe
CAN I USE THIS FOR MICROBIAL ELECTROLYSIS?
unfortunately not
hello, is it possible to simulate it by Aspen Hysys ?
Unfortunately, I am not familiar with Hysys.
Could you send me the simulation file please?
See the video description please
Why is the conversion of h2o so low?
Please see the data source for this video: Monica Sanchez, Ernesto Amores, David Abad, Lourdes Rodriguez, Carmen Clemente-Jul. Aspen Plus model of an alkaline electrolysis system for hydrogen production. international journal of hydrogen energy. 45. 2020.
@@kgengineeringsolutions they use ACM for stack operation
Thanks for the video
I would be grateful if someone has the installation of Aspen+crack and can share?
omg