What a fantastic job you have done here. Could you please explain a bit about control scenario, and how you mange to control vfd in those pumps to keep them on optimum point of the curve.
Hi, many thanks for your support. I made another video to illustrate the control of pumps working in series in short pipelines, it is not published yet. I will make another one for pumps working on parallel. Thanks for the suggestion
I am not entirely sure why you used a macro here instead of just a table with some if-then statements to create the values. I think I managed to do that. Maybe I missed something? Thanks
Hi Steve, Thanks to take the time to comment. it is matter of preference. the main idea of the video is discussing operating more than one pump in parallel. Macro is one way to use to calculate the net result. I found macros easier to debug, can accommodate more complex tasks, and a step for more easy to user interface (if Forms is used). Also to find the operating point (intersection between the two curves) it may be easier to use Macro.
Thanks for your comment, if you mean the VFD output frequency then i think the answer is yes and no. in brief: Output frequency defines motor speed, which define the pump curve, now the operating process point on the curve is defined by the process resistance. As long as your process resistance curve does not change you can predict the flow rate (with relative accuracy). The system resistance is the total losses in each system component (pipe, elbow, valve....) or gain (level change). Assume your pump is running at any speed, and now close the suction or discharge valve which will change the system resistance (forget about pump damage due to excessive heat or cavitation) the flow rate will change. For fixed speed pump, it is common to use the motor current as indication of the flow rate. if you need to discuss in details you can email me at "lunchnlearnchannel@gmail.com"
I do not have access to my computer now however I am working on developing another one which does not use macro as Steve commented. If you are interested, I can send you this file which shall do the same
@@ianclark2097 Hi, sorry I am trying to fix this link. If you send your email or send me an email the the email included in the description, I will send the file to you. Cheers
@@LunchandLearnX I will send you an email directly and it should be in your inbox shortly. Much appreciate the swift response and your excellent content. Very helpful!
@@ianclark2097 I sent the file but I received the following: The response from the remote server was: 550 permanent failure for one or more recipients (ian.clark@ajay-sqm.com:blocked). Please unblock or use valid email
![HIWWHEE | OHM [Official MV]](http://i.ytimg.com/vi/OJJLtTLqLag/mqdefault.jpg)
a good video to understand how different size pumps operate in parallel. it is quite simple after you have explained it.
Pleased to know, thanks for leaving comment
Another great lunch & learn, many thanks, email sent for the excel file, keep up the good sessions 👍👏
nice video to understand parellel VFD operations
Thanks for your feedback
What a fantastic job you have done here. Could you please explain a bit about control scenario, and how you mange to control vfd in those pumps to keep them on optimum point of the curve.
Hi, many thanks for your support. I made another video to illustrate the control of pumps working in series in short pipelines, it is not published yet. I will make another one for pumps working on parallel. Thanks for the suggestion
Very Interesting .Thanks alot for your explanations.
Thanks for watching,
Best video ever
Very glade to know that you like it, many thanks for laving comment.
Great really great many thanx
Thanks for leaving the nice comment
@@LunchandLearnX May I have these excel sheets to improve my skills
@@mussaelbarrani1245 The file sent to your email. Regards
I am not entirely sure why you used a macro here instead of just a table with some if-then statements to create the values. I think I managed to do that. Maybe I missed something? Thanks
Hi Steve, Thanks to take the time to comment. it is matter of preference. the main idea of the video is discussing operating more than one pump in parallel. Macro is one way to use to calculate the net result. I found macros easier to debug, can accommodate more complex tasks, and a step for more easy to user interface (if Forms is used). Also to find the operating point (intersection between the two curves) it may be easier to use Macro.
amaaaaaazing video, just what i was looking for for quite a while
it is possible that you can send me that excel sheet?
Yes, as a case study, please advise your contact
@@LunchandLearnX
my email is
Mahmoud.salem@powerhouseegypt.com
@@LunchandLearnX Appreciate if you can send a copy to kiansoon88@gmail.com too. Very informative video!
@L&L Lunch and Learn, if possible could you send the excel sheet to dkrueger@archbold.com. thanks...video was exactly what I was looking for
@@LunchandLearnX Great video. Appreciate if you could email me the spreadsheet to aharain1965@gmail.com
Can we use comparison formula for Frequency (Hz) to get the value of flowrate?
Thanks for your comment, if you mean the VFD output frequency then i think the answer is yes and no. in brief:
Output frequency defines motor speed, which define the pump curve, now the operating process point on the curve is defined by the process resistance.
As long as your process resistance curve does not change you can predict the flow rate (with relative accuracy). The system resistance is the total losses in each system component (pipe, elbow, valve....) or gain (level change).
Assume your pump is running at any speed, and now close the suction or discharge valve which will change the system resistance (forget about pump damage due to excessive heat or cavitation) the flow rate will change.
For fixed speed pump, it is common to use the motor current as indication of the flow rate. if you need to discuss in details you can email me at "lunchnlearnchannel@gmail.com"
Thanks Aly for the interesting video. the link for the excel file doesn't work. Can you share a new link? many thanks
Sorry for the link, you can email me at lunchnlearnchannel@gmail.com and I will send you the file
Great
Great video man, may i have the excel sheet?
Thanks for watching and leaving a comment. Please email me or advise your email. Email address in description
Sent,
Great video.
I am looking to create a similar power analysis..
Can you send me the excel file and performance curves of the 3 pumps?
I do not have access to my computer now however I am working on developing another one which does not use macro as Steve commented. If you are interested, I can send you this file which shall do the same
@@LunchandLearnX Hi, would you mind sharing the excel file? Many thanks!
@@LunchandLearnX hi could u pls share the excel file with power analysis? Tqvm
@@eychng sure, please advise your email
Dear Sir, I have pumps related issue. Can you please help me with that?? Thanks
Sure if I can, you can email me at lunchnlearnchannel@gmail.com
hi..really appreciate if can you share the excel sheet. TQ very much L&L
Hi thanks for your view. Can you check the link in the description to download the file. If it does not work let me know
@@LunchandLearnX hello I tried accessing the file through the link and it didn't work. Your help regarding this file is much appreciated
@@ianclark2097 Hi, sorry I am trying to fix this link. If you send your email or send me an email the the email included in the description, I will send the file to you. Cheers
@@LunchandLearnX I will send you an email directly and it should be in your inbox shortly. Much appreciate the swift response and your excellent content. Very helpful!
@@ianclark2097 I sent the file but I received the following: The response from the remote server was:
550 permanent failure for one or more recipients (ian.clark@ajay-sqm.com:blocked). Please unblock or use valid email
it is possible that you can send me that excel sheet?
Sure just need your email address
You can email me using the email address in the description
can you share the excel sheet
Hi Ahmed, Tanks for leaving comment, please contact me through the email address in the description and I will send it to you.
@@LunchandLearnX i send an email waiting for your reply. thanks in advance