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Join Date: Dec 2010
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Retrofitting Screw Compressor With Variable Speed Drive

01/14/2013 11:57 AM

Hi All,

We need to use Variable speed drive with existing screw compressor which is used for Ammonia based refrigeration unit.

Could any one put quick thoughts on what we may need to consider before going any further.

Cheers,

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Guru
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#1

Re: Retrofitting Screw Compressor With Variable Speed Drive

01/14/2013 12:32 PM

Hire someone familar with ammonia compressors and systems, this is not a job for the inexperianced. I believed you recieved the same answer on your other post on this project.

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#2

Re: Retrofitting Screw Compressor With Variable Speed Drive

01/14/2013 2:29 PM

Please see the companion thread.

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#3

Re: Retrofitting Screw Compressor With Variable Speed Drive

01/14/2013 3:02 PM

Yep. Hire someone.

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#4

Re: Retrofitting Screw Compressor With Variable Speed Drive

01/14/2013 5:11 PM

Consider engaging the services of a consultant, conversant in the technologies at hand.

Consider the implications of lost production, if your present crew cannot design, specify, purchase and install such a system properly.

Consider also, the liability incurred by the specifier and installer of such a system, if it fails.

Consider me finished here. Good luck, whichever path you choose.

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#5

Re: Retrofitting Screw Compressor With Variable Speed Drive

01/14/2013 9:42 PM

Thanks All,

I am definitely going to hire some consultant.

Can someone from this group be a mentor on charge basis? or if some one can suggest good reading.

Many thanks

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Guru
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#6

Re: Retrofitting Screw Compressor With Variable Speed Drive

01/14/2013 9:47 PM

Check if the oil system will work properly at less rpm. Some types will, and some won't.

If the control response is too fast, there may be risk of liquid flooding in the compressor suction.

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