8/18/2019 AICHE Spring 2016 PRICO Presentation
1/23
Using Dynamic Simulation toImprove a PRICO LNG LiquefactionPlant Operation
Guofu Chen
GChenGuofuChen!com
8/18/2019 AICHE Spring 2016 PRICO Presentation
2/23
"#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!
8/18/2019 AICHE Spring 2016 PRICO Presentation
3/23
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!
8/18/2019 AICHE Spring 2016 PRICO Presentation
4/23
"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
8/18/2019 AICHE Spring 2016 PRICO Presentation
5/23
Intro&uction to PRICO LNGProcess• In the early ?@)s* 7lac5 8 9eatch &evelope& the PRICOA single
8/18/2019 AICHE Spring 2016 PRICO Presentation
6/23
PRICO Process ;lo'Diagram
Diagram eBtracte& from 789 'e#site
8/18/2019 AICHE Spring 2016 PRICO Presentation
7/23
"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
8/18/2019 AICHE Spring 2016 PRICO Presentation
8/23
8/18/2019 AICHE Spring 2016 PRICO Presentation
9/23
$C4% Con.guration
8/18/2019 AICHE Spring 2016 PRICO Presentation
10/23
Compressor Curves RP$s
Est Section
(n& Section
8/18/2019 AICHE Spring 2016 PRICO Presentation
11/23
"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
8/18/2019 AICHE Spring 2016 PRICO Presentation
12/23
Complete PRICO ProcessControl
8/18/2019 AICHE Spring 2016 PRICO Presentation
13/23
LNG -emperature Control
•
;inal LNG outlet temperature iscontrolle& #y the main compressorspee& or gui&e vanes!
8/18/2019 AICHE Spring 2016 PRICO Presentation
14/23
Compressor Suction Control
• $isconceptionF Control thecompressor suction pressure via 2- valve!
• Pro#lemF Liqui& carryover tocompressor
• "ppropriateF Controlsuction superheat*instea& of pressure!
8/18/2019 AICHE Spring 2016 PRICO Presentation
15/23
"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
8/18/2019 AICHE Spring 2016 PRICO Presentation
16/23
-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
8/18/2019 AICHE Spring 2016 PRICO Presentation
17/23
8/18/2019 AICHE Spring 2016 PRICO Presentation
18/23
-he Pro#lem
•
LNG temperature increases to
8/18/2019 AICHE Spring 2016 PRICO Presentation
19/23
Q%S Q%S Q%S
Lo'er superheat lea&s to lo'er
po'er consumption an& LNGtemperature!
8/18/2019 AICHE Spring 2016 PRICO Presentation
20/23
-he Solution
•
ith lo'er superheat temperature*the LNG temperature is #ac5 to
8/18/2019 AICHE Spring 2016 PRICO Presentation
21/23
"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
8/18/2019 AICHE Spring 2016 PRICO Presentation
22/23
>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!
8/18/2019 AICHE Spring 2016 PRICO Presentation
23/23
=uestions
Guofu ChenGChenGuofuChen!com