From the way your question is worded, you must be running an electric drive
compressor. Assuming you do not have a programmable logic controller that
is loading and unloading the cylinders, which could give a record, then the
next best approach would be to put a recorder on the motor current, or on
the signal that controls the deactivation. Changes in operating pressures
would be expected to give a gradual change in motor current. But
deactivation/reactivation of cylinders should give a significant, step
change in current. This would give a record of status. But a simple total
of power usage is not going to show breakdown of time between various states
of loading.
George McKinney
Augusta Engineering & Design, Inc.
> These are some real good questions to ask the manufacturer that sold you
the equipment. They know the detail workings of their equipment and can give
you knowledge of how it operates under different conditions, part load, etc.
> Alex Dornn
> ----- Original Message -----
> From: A S Mazumdar
> To: <a href="/group/PipingDesign/post?postID=tk6uqxrpggwGAejj6l80wFpFBo_FBMZFuFtnle3jCmV9udccyhhX-ocrj0y_JyDKPwm29uUH84t7ic4ip96l-Y17">pipingdesign@yahoogroups.com</a>
> Sent: Sunday, December 04, 2005 9:49 PM
> Subject: [PipingDesign] Queries on compressor
>
>
> Sir,
> I had a query on compressor.
> Suppose I have a reciprocating compressor which I have been observing
> that it's consuming much less power than it's rated. Hence it is running
> under part load condition. But it's known that a reciprocating
compressor
> consumes greater power than what it should have consumed under that
> loading.
> It is also known that under part load condition some of the cylinders
are
> automatically shut off so as to consume less power. My question is how
> can I establish this that during the entire run of a compressor for a
> week's time ...
> 1. It had run ___ hrs under full load condition( all cylinders in
> operation)
> 2. Under part load condition __ hrs ( some cylinders were not in
> operation)
> 3. Under part load conditions how much is the power consumption
> greater than compared to a partly loaded screw compressor.
>
> Is there any particular way I can really know that within a certain
> duration exactly N nos. of the cylinders were not in operation?
> If I want to make a entire chart on the working pattern of compressors(
> loading pattern)for a certain period how can I do that?
>
> Regards,
> Anindya Mazumdar
> Maxpro Department
> United Phosphorus Limited
> Mobile : 9825797634
>
>
>
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