Modeling of single mixed refrigerant process for offshore natural gas liquefaction

The main objective of this thesis is to model a single mixed refrigerant process for offshore natural gas liquefaction using ASPEN HYSYS as a simulation tools.The liquefaction process employed in this part is a result of modification of previous case done by C.W.Remeljeja and A.F.A.Hoadley (2004). T...

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Main Author:	Syed Ahmad Farhan , Syed Ab Mutalib
Format:	Undergraduates Project Papers
Language:	English
Published:	2011
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/5295/ http://umpir.ump.edu.my/id/eprint/5295/ http://umpir.ump.edu.my/id/eprint/5295/1/CD5644.pdf

id	ump-5295
recordtype	eprints
spelling	ump-52952015-03-03T09:24:07Z http://umpir.ump.edu.my/id/eprint/5295/ Modeling of single mixed refrigerant process for offshore natural gas liquefaction Syed Ahmad Farhan , Syed Ab Mutalib TP Chemical technology The main objective of this thesis is to model a single mixed refrigerant process for offshore natural gas liquefaction using ASPEN HYSYS as a simulation tools.The liquefaction process employed in this part is a result of modification of previous case done by C.W.Remeljeja and A.F.A.Hoadley (2004). This work is divided into two sections.First is to model the PRICO LNG process that published result.Second is to improve the model by adding the mixer in the mixed refrigerant stream after the separator.It allows two different phase of gas and liquid of mixed refrigerant to mix together before entering the LNG Heat Exchanger (cold box).The mixer also helps to maintain a constant flow rate of the stream to the cold box.The results are obtained after the system is converged.When modeling the PRICO process in Aspen Hysys,certain variables such as temperature and pressure at the streams entering and leaving the cold box cannot be changed directly.This will cause temperature cross and change of mixed refrigerant phase in the respected stream.As a result,by doing structural modification on the basic PRICO process specifically in case 3,the load duty of the compressor can be lowered significantly.After three different structural modifications discussed in this paper, the compressor duty to liquefy the natural gas can be reduced down to 82300.46 kW when compared to the base case. As a conclusion,structural modification in case 3 is the best model when compare case 1 and case 2 because it operates in lowest compressor duty.For the future improvement,a different structure modification can be done using case 3 as a base model,for example replacing the valve with a multiphase expander to generate electricity in this LNG liquefaction process. 2011-03 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/5295/1/CD5644.pdf Syed Ahmad Farhan , Syed Ab Mutalib (2011) Modeling of single mixed refrigerant process for offshore natural gas liquefaction. Faculty of Chemical & Natural Resource Engineering, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:58139&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Syed Ahmad Farhan , Syed Ab Mutalib Modeling of single mixed refrigerant process for offshore natural gas liquefaction
description	The main objective of this thesis is to model a single mixed refrigerant process for offshore natural gas liquefaction using ASPEN HYSYS as a simulation tools.The liquefaction process employed in this part is a result of modification of previous case done by C.W.Remeljeja and A.F.A.Hoadley (2004). This work is divided into two sections.First is to model the PRICO LNG process that published result.Second is to improve the model by adding the mixer in the mixed refrigerant stream after the separator.It allows two different phase of gas and liquid of mixed refrigerant to mix together before entering the LNG Heat Exchanger (cold box).The mixer also helps to maintain a constant flow rate of the stream to the cold box.The results are obtained after the system is converged.When modeling the PRICO process in Aspen Hysys,certain variables such as temperature and pressure at the streams entering and leaving the cold box cannot be changed directly.This will cause temperature cross and change of mixed refrigerant phase in the respected stream.As a result,by doing structural modification on the basic PRICO process specifically in case 3,the load duty of the compressor can be lowered significantly.After three different structural modifications discussed in this paper, the compressor duty to liquefy the natural gas can be reduced down to 82300.46 kW when compared to the base case. As a conclusion,structural modification in case 3 is the best model when compare case 1 and case 2 because it operates in lowest compressor duty.For the future improvement,a different structure modification can be done using case 3 as a base model,for example replacing the valve with a multiphase expander to generate electricity in this LNG liquefaction process.
format	Undergraduates Project Papers
author	Syed Ahmad Farhan , Syed Ab Mutalib
author_facet	Syed Ahmad Farhan , Syed Ab Mutalib
author_sort	Syed Ahmad Farhan , Syed Ab Mutalib
title	Modeling of single mixed refrigerant process for offshore natural gas liquefaction
title_short	Modeling of single mixed refrigerant process for offshore natural gas liquefaction
title_full	Modeling of single mixed refrigerant process for offshore natural gas liquefaction
title_fullStr	Modeling of single mixed refrigerant process for offshore natural gas liquefaction
title_full_unstemmed	Modeling of single mixed refrigerant process for offshore natural gas liquefaction
title_sort	modeling of single mixed refrigerant process for offshore natural gas liquefaction
publishDate	2011
url	http://umpir.ump.edu.my/id/eprint/5295/ http://umpir.ump.edu.my/id/eprint/5295/ http://umpir.ump.edu.my/id/eprint/5295/1/CD5644.pdf
first_indexed	2023-09-18T22:00:34Z
last_indexed	2023-09-18T22:00:34Z
_version_	1777414369836007424

Modeling of single mixed refrigerant process for offshore natural gas liquefaction

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