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Refrigeration Cost For Ethylene Splitter

refrigerant loop steam cracker propylene ethylene

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#1 Movers

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Posted 02 August 2018 - 01:00 AM

Hello.

 

I have to evaluate cost of production of cold using to chilling of the charge gas on Steam Cracker Plant, but I have no idea how to start with this. Could anyone give me some advice?

 

 

Regards 



#2 gegio1960

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Posted 02 August 2018 - 01:33 AM

just to propose a starting direction...

in order to obtain cold you may need to install a refrigeration cycle.

it involves a CAPEX (investment costs, in $) and some OPEX (operating expenses, in $/y).

the plant life will be some years, L.

your cost will be (CAPEX/L+OPEX), $/y

under CAPEX or OPEX covers you have to put all the specific costing items relevant to your refrigeration production.

with more specific project info, you would obtain more specific answers...

good luck!



#3 Bobby Strain

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Posted 02 August 2018 - 08:55 AM

Why?

 

Bobby



#4 Movers

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Posted 06 August 2018 - 02:02 AM

Thanks for reply. I need to evaluate costs on existing plant. Generally I have to know how much money we loose due to inefficient insulation on ethylene spliter. In attachment you can find a simply sketch. It is not a problem to determine losses of "heat" from this splitter but I do not know how calculate it in cash  

 

Regards

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#5 gegio1960

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Posted 06 August 2018 - 03:59 AM

it's a very confusing description of your scope...

maybe the configuration of your splitter is in accordance to the attached picture...

what about your cold utility?

....

 

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#6 breizh

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Posted 06 August 2018 - 07:17 AM

Hi ,

Hope this document and associated software can help you and others

Good luck

Breizh

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#7 umeshshelke

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Posted 06 August 2018 - 10:25 AM

Chilling in a Ethylene cracker is provided by Ethylene refrigeration system and propylene refrigeration system.

1) find out from the fuel gas/BFW cost for steam production in furnaces and boilers.

2) Then use steam consumption to Ethylene refrigeration system and propylene refrigeration system to calculate the cost of chilling.

3) Check for the electrical consumption numbers of the pumps in these systems.


Edited by umeshshelke, 06 August 2018 - 10:27 AM.


#8 Bobby Strain

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Posted 07 August 2018 - 03:43 PM

Your cost may be much greater if your production is limited by refrigeration capacity.

 

Bobby



#9 Movers

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Posted 09 August 2018 - 12:09 AM

Thanks to all for advises.






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