10 replies to this topic

[chetanhm2]

Compressor characteristic curves are for certain design conditions only like design curves.

For compressor fouling, I want to compare some previous point in time possibly startup clean conditions at the operating inlet conditions that day to some later point in time today say at today operating inlet conditions therefore we have to convert today values to the same inlet conditions as previous! The difference would represent the amount of efficiency loss due to fouling thus normalising for change in operating conditions.

Request your help in how generally we do this conversion of compressor performance for change in inlet conditions here

[breizh]

Hi,

If I was in your shoes , I will compute and compare the today data to the data at the start up ( brand new and clean unit) .

For a given condition ( Pressure outlet , Flow rate)  today and at start up I will calculate/measure the energy consumption (driver) per m3 of compressed gas .

With these 2 data I will be able to evaluate the impact on the compressor performance . 

 

my 2 cents

Breizh 

Edited by breizh, 18 August 2020 - 08:03 AM.

[chetanhm2]

How can we do it using compressor curves ?

Or any other way

[chetanhm2]

Dear Sir, if we measure energy consumption of compressor and speed is changed for these two points viz SOR and also today conditions then how we can account for this ?

Regards,
Chetan Chavan

[chetanhm2]

I want to get today clean efficiency that we can compare it to measured efficiency here.and want to account for change in inlet conditions here.

What is the method generally used to achieve this

[breizh]

https://www.youtube....h?v=k62e74Hd_tA

 

FYI

Good luck

Breizh 

[chetanhm2]

Dear Sir,

I want your help on how to normalize efficiency values when compressor inlet conditions changes

[breizh]

Hi,

Consider these resources to support your work.

Good luck.

Breizh

Attached Files

•  How_to_Use_the_Perf_Curves_to_Evaluate_Behavior_of_Cent_Comp.pdf   533.86KB   21 downloads
•  compressor calculation shortcut.pdf   4.14MB   30 downloads

Edited by breizh, 21 August 2020 - 04:11 AM.

[chetanhm2]

Hi,

I m looking for Evaluation of Polytropic efficiency for two points like one is for SOR conditions when we have started new cleaned compressor and after say three months , my inlet conditions changes also so how to account for change in inlet conditions and it's impact on polytopic efficiency here

[chetanhm2]

Dear Sir ,

Still I could not find any solution for my issue of normalisation of compressor efficiency

[chetanhm2]

Dear Sir ,

Still I could not find any solution for my issue of normalisation of compressor efficiency. Plz help me in this. I have two points for compressor efficiency one is at SOR start of Run and second is today. SOR will be rather clean compressor and today is copied compressor