AICHE Spring 2016 PRICO Presentation

8/18/2019 AICHE Spring 2016 PRICO Presentation

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Using Dynamic Simulation toImprove a PRICO LNG LiquefactionPlant Operation

Guofu Chen

GChenGuofuChen!com


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"#out Guofu• Guofu Chen is a professional $echanical %ngineer an& a professional

Chemical %ngineer as 'ell!

• $r! Guofu Chen starte& his career at "ir Liqui&e as a process engineerright after gra&uation in ())(* ma+oring refrigeration an& cryogenics!

•

In ()), $r! Chen +oine& -"S %nergy an& focuse& on gas tur#ine inlet airchilling! Speci.cally he &esigne& three /01 tur#ine inlet chilling plants forthree /01 "ustralian LNG pro+ects!

• "#out t'o years ago* $r! Chen #ecame a team mem#er of 2ouleProcessing! Over there* he focuse& on mo&ular gas processing an&

con&ensate sta#ili3ation plants!

• $r! Chen has one patent application! 4e also spea5s at &i6erentconferences* such as "spen-ech* "S$%* GP" an& Po'erGen conference!


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Disclaimer

•

PRICO is an LNG process to liquefy naturalgas! -he patent is o'ne& #y 7lac5 8 9eatch!

• -he author &oes not 'or5 for 7lac5 8

9eatch* nor the paper is sponsore& #y 789! -he author is not a:liate& 'ith 789 #y anymeans!

• -he paper is for aca&emy research purposeonly!


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"gen&a• Intro&uction to PRICO LNG Process

– $o&eling in 9$GSim

• Process Control of PRICO Process

– Refrigerant ;lo' an& LNG -emperature Control

– Refrigerant Compressor Suction Control

• Optimi3e PRICO to Liquefy $ore LNG

– -he Challenge 'ith Statusey -a5ea'ay


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Intro&uction to PRICO LNGProcess• In the early ?@)s* 7lac5 8 9eatch &evelope& the PRICOA single


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PRICO Process ;lo'Diagram

Diagram eBtracte& from 789 'e#site


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$C4% Con.guration


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Compressor Curves RP$s

Est Section

(n& Section


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Complete PRICO ProcessControl


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LNG -emperature Control

•

;inal LNG outlet temperature iscontrolle& #y the main compressorspee& or gui&e vanes!


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Compressor Suction Control

• $isconceptionF Control thecompressor suction pressure via 2- valve!

• Pro#lemF Liqui& carryover tocompressor

• "ppropriateF Controlsuction superheat*instea& of pressure!


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-he Challenge

•

-he LNG o' 'as (H)*))) l#hr /JE$$-P"1

•

Superheat of compressor suction 'asK) ;!

•

Is the plant a#le to liquefy () moreo'M


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-he Pro#lem

•

LNG temperature increases to


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Q%S Q%S Q%S

Lo'er superheat lea&s to lo'er

po'er consumption an& LNGtemperature!


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-he Solution

•

ith lo'er superheat temperature*the LNG temperature is #ac5 to


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>ey -a5ea'ay

•

Do not control the Est

stage suctionpressure* instea&* control the suctionsuperheat!

• Optimi3e the superheat to re&ucepo'er consumption* yet ma5e sureno liqui& carryover!


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=uestions

Guofu ChenGChenGuofuChen!com

AICHE Spring 2016 PRICO Presentation

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