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Olubaba
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Join Date: Nov 2010
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Hours Run By a Generator Calculation

11/13/2010 9:16 PM

Hello,

I have a serious analysis in my hands to do. A report was submitted to me where I need to calculate the number of hours run weekly by a generator from the KW/h reading from the Generator. How possible is this?
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lyn
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#1

Re: Hours run by a Generator Calculation

11/13/2010 9:29 PM

Very.
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Olubaba
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#5
In reply to #1

Re: Hours run by a Generator Calculation

11/13/2010 10:29 PM

Help convert KVA to KWhr.
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
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#6
In reply to #5

Re: Hours run by a Generator Calculation

11/14/2010 1:28 AM

KWhr = KVA x cos φ x hr. (cos φ is also called "power factor" or "PF").

Or, more accurately, KWhr = ∫0hr KVAt cos φt dt. (Because KVA and cos φ can vary over time.)

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Tornado
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#2

Re: Hours run by a Generator Calculation

11/13/2010 9:56 PM

On the contrary, it is virtually impossible to do precisely what you are saying.

However, maybe the generator has an hour meter on it? If so, read it at the beginning and end of the week of interest, and subtract. Or if a plant log is kept, examine the times when the generator was started/stopped.

BTW, there is no such meaningful unit as KW/h.

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lyn
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#3

Re: Hours run by a Generator Calculation

11/13/2010 10:03 PM

Sorry, I assumed the hour meter information would be included in the "report".
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Tornado
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#4
In reply to #3

Re: Hours run by a Generator Calculation

11/13/2010 10:08 PM

My turn to be sorry--I get it now!

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