K Factor for Battey Sizing

This might help....
http://myelectrical.com/notes/entryid/163/battery-sizing

http://www.alcad.com/tools/training-courses

Dear SolarEagal

About proceedure concept is clear but I am particularly stucked at the K factor, it will be very helpful if you check the data given in the question and attached catelouge and tell how it will be calculated using attached catelouge.

The term Kt is the ratio of ampere-hour capacity, at a standard time rate, at 25oC and to a defined minimum voltage which can be delivered for t minutes.

I am sure the data given by me is sufficent to calculate K factor but dont know how to calculate it from catelouge.

Defination of Kt here is also confusing.

Sherena Fernandes

GET-Electrical

Delhi

Check 2.2 in this link....

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.14.6258&rep=rep1&type=pdf

This would be an example of non-discharge rate dependent model...and not allowing for design factors etc....

Dear Iyn Sir,

I am a regular reader of this forum and I am big fan of yours.I request you to guide how to calculate k factor manually.Our client is not comfortable with calculations done by the software.

So I is my request you to pl prove your expertise for the manual calculation.

For 1.10 V i want to know how to derive k factor for

1 minute load @ 125A

1-119 minute load @ 50A

120 Minute load @ 150A

Regards,

Serena Fernandes

GET-Electrical

Delhi

GA.. @OP....and how comfortable would they be knowing they hired the wrong guy!!

We help people to learn how to fish, we do not provide free fish so that you can turn around and sell them at a profit.

Urban Dictionary: Bite the hand that feeds you

Actually you did, you asked me to share my specialized knowledge of this topic. I prepared a direct answer to your question, complete with formula and examples, which I was preparing to post when I saw your later responses, hence my curt reply.

Sorry, no free lunches for wannabe consultants, but I do appreciate that you identified yourself at the bottom (how appropriate) of post #4 so that someone in your client's or your own organization might see what you're about.

At this point I will remain mum, and trust that the rest of the forum members will heed your advice as well.

Quotations for help can be prepared and sent using http://www.indiacatalog.com/web_directory/electrical/electrical.html for directions.

Dear Mr.RAMConsult,

I share with your feelings. About last year a similar situation, I addressed to the Moderator, to remove the posting.

You are correct, and many basic questions are raised in this Forum, which makes to feel, that such easy going individual want somebody to do their job. Due to this,the CR4 standards are coming down, which is a cause of concern.

May I conclude that we can ignore such indecent behaviour of worth less individuals.

DHAYANANDHAN.S

Dear Mr.RAMConsult,

I am intrested to know some details on K factor, for Battery Sizing. Pl. consider my request to post the information through CR4 Personal Messaging.

Above all I request you not to mistake me that I am asking for details when you are offended by some worthless individual.

Thanks,

DHAYANANDHAN.S

sir, I went through the thread. I have developed complete calculation, but Kt factors are not provided by EXIDE or any other vendor for Plante/VRLA/HDP. I need to submit them for getting approval. Is it available? or it is interpretation from data available? i am searching this since long but not getting answer. pls help.

Kapil,

There is information available on the web from other vendors, but I cannot suggest to you how transferable it is from one design to another. I also noted that there is an Indian battery manufacturer with "Exide" in it, but it does not appear to have any connection to any other of the "Exides", though you may want to read as much as you can about similarly named batteries in the rest of the world. Buried in there you will find the information you seek, but you will have to use your engineering skills to determine how directly applicable it is to your particular situation.

As an alternative you could send a letter to your vendor telling them that you cannot under any circumstances include them in your bidding process because of their unresponsiveness. Good luck to you.

For the record, RAMConsult knows far more about the subject at hand than I.

I don't normally even respond to people who are being paid for their work and come here wanting us to do it for them, as you have done.

Your customer doesn't trust a software program provided, for a fee by your company, and yet you have no clue how to perform the work on your own.

Good luck getting any more tutoring here.

Dear Mr. lyn,

VERY TRUE.

I concur with your views and you are absolutely correct.

How precisely you have worded as "I don't normally even respond to people who are being paid for their work and come here wanting us to do it for them..." and I admire this statement.

Secondly you have depicted your GREATNESS in acknowledging the ABILITY, CAPACITY and CAPABILITY of other Members - in this case Mr.RAMConsult.

HATS OFF TO YOU.

DHAYANANDHAN.S

Dear All

I am extremely sorry to all of you.

What I was written was a result of extreme pressure from my seniors and client.As I am new in this professional world so dont know how to proceed.

I am an idiot who dont know how to proceed.

Sorry once again.

Surely there must be another individual at the facility who can act as a Mentor?

G'oglin' the [ computation "performance factor" coulombs Ah storage ]

seems to correlate with the p.306