IAFMI KMI EXPERT SHARING Sabtu 21 Feb 2015, MEMBANGUN INFRASTRUKTUR MIGAS NASIONAL
Energy Efficient LNG Production
by Abang Daya Wiguna, Boris Ertl, Dugald Wright
The Tangguh LNG plant in Papua Barat,
Indonesia employs innovative heat and
power integration, delivering a step
change in energy efficiency compared to
conventional open cycle liquefaction.
Now that the plant is operational, the
actual energy efficiency has been
studied to gather the data needed to
optimise lifecycle energy performance.
The liquefaction facilities at Tangguh
produce 7.6 MTPA of LNG from a lean
gas feed, with four
Frame 7 gas turbine drivers powering
two C3MR technology liquefaction
trains, in a split-MR configuration (APCI
license). Waste heat from the gas
turbine drivers produces high pressure
steam which provides energy to steam
turbine starter / helper drivers on the
refrigeration compression strings, and
electrical power generation at the site.
Low pressure steam, predominantly
extracted from the steam turbine
drivers, provides the process heating
requirement - notably for the acid gas
removal unit. Utility boilers are installed
for start-up loads, and to make-up
steam in operation; maintaining the
heat and power balance of the complex.
This configuration has a number of
environmental and operating
advantages over conventional open
cycle systems, including:
· lower fuel use and CO2 emissions
· turbines with steady high loads -
maximising efficiency and minimising
emissions (including NOx)
· reduced electrical power
infrastructure, due to some key drivers
provided by steam turbines
· high stored energy in steam drums &
headers result in good system stability
and robust transient response
behaviour
Measured fuel use during the
performance test of the Tangguh LNG
plant was equivalent to approximately
0.23 tonnes CO2 from combustion gas
per tonne of LNG exported. A recent
energy review has trended actual energy
consumption over a longer period, and
confirmed that despite the hot location
and very lean feed gas, energy
consumption has averaged below 4.5
MMBtu per tonne of LNG exported
(below 0.24 tonnes combustion gas CO2
per tonne of LNG exported.)
Heat and power integration brings
tangible benefits to liquefaction plant
design and operation.
These benefits come at the price of
increased complexity though, due to
integration between process and utilities
systems, and a potential increased
impact of "common mode failure", in
which a steam system failure has a
significant impact on the overall plant
operation. However, on balance the
benefits dominate, and a similar
integrated heat and power concept is
planned to be deployed to the Tangguh
expansion project and other future LNG
developments.
Abang Daya Wiguna lulus Teknik Kimia Universitas
Parahiyangan Bandung pada tahun 2005.
Berpengalaman 9 tahun sebagai Process Engineer,
khususnya LNG Processing di Tangguh LNG Project dan
Operation. Abang terlibat di BP LNG Tangguh mulai dari
Engineering Desain, Eksekusi Proyek, Commissioning,
Start up dan Operation Tangguh Base project (Train 1
dan 2). Saat ini Abang sedang terlibat dalam Concept
Selection & Definition untuk Tangguh Expansion
Project.
Paper mengenai Energy Efficient LNG Production ditulis
bersama Boris Ertl dan Dugald Wright.
Boris Ertl adalah Lead Discipline untuk Gas Processing
dan LNG di BP Upstream Engineering Centre yang
berkedudukan di Sunbury-on-Thames, UK.
Berpengalaman lebih dari 25 tahun dibidang Gas
Processing dan LNG, Boris telah berkontribusi dalam
mendukung Proyek Tangguh dan Operation sejak tahun
2006.
Dugald Wright adalah Subject Matter Expert untuk
Energy Efficiency BP Upstream Engineering Centre
yang berkedudukan di Sunbury-on-Thames, UK. Doog
telah mengaplikasikan teknik modeling untuk analisa
dan optimasi Energy Efficiency Performance di berbagai
fasilitas BP termasuk Tangguh.
by Abang Daya Wiguna, Boris Ertl, Dugald Wright
The Tangguh LNG plant in Papua Barat,
Indonesia employs innovative heat and
power integration, delivering a step
change in energy efficiency compared to
conventional open cycle liquefaction.
Now that the plant is operational, the
actual energy efficiency has been
studied to gather the data needed to
optimise lifecycle energy performance.
The liquefaction facilities at Tangguh
produce 7.6 MTPA of LNG from a lean
gas feed, with four
Frame 7 gas turbine drivers powering
two C3MR technology liquefaction
trains, in a split-MR configuration (APCI
license). Waste heat from the gas
turbine drivers produces high pressure
steam which provides energy to steam
turbine starter / helper drivers on the
refrigeration compression strings, and
electrical power generation at the site.
Low pressure steam, predominantly
extracted from the steam turbine
drivers, provides the process heating
requirement - notably for the acid gas
removal unit. Utility boilers are installed
for start-up loads, and to make-up
steam in operation; maintaining the
heat and power balance of the complex.
This configuration has a number of
environmental and operating
advantages over conventional open
cycle systems, including:
· lower fuel use and CO2 emissions
· turbines with steady high loads -
maximising efficiency and minimising
emissions (including NOx)
· reduced electrical power
infrastructure, due to some key drivers
provided by steam turbines
· high stored energy in steam drums &
headers result in good system stability
and robust transient response
behaviour
Measured fuel use during the
performance test of the Tangguh LNG
plant was equivalent to approximately
0.23 tonnes CO2 from combustion gas
per tonne of LNG exported. A recent
energy review has trended actual energy
consumption over a longer period, and
confirmed that despite the hot location
and very lean feed gas, energy
consumption has averaged below 4.5
MMBtu per tonne of LNG exported
(below 0.24 tonnes combustion gas CO2
per tonne of LNG exported.)
Heat and power integration brings
tangible benefits to liquefaction plant
design and operation.
These benefits come at the price of
increased complexity though, due to
integration between process and utilities
systems, and a potential increased
impact of "common mode failure", in
which a steam system failure has a
significant impact on the overall plant
operation. However, on balance the
benefits dominate, and a similar
integrated heat and power concept is
planned to be deployed to the Tangguh
expansion project and other future LNG
developments.
Abang Daya Wiguna lulus Teknik Kimia Universitas
Parahiyangan Bandung pada tahun 2005.
Berpengalaman 9 tahun sebagai Process Engineer,
khususnya LNG Processing di Tangguh LNG Project dan
Operation. Abang terlibat di BP LNG Tangguh mulai dari
Engineering Desain, Eksekusi Proyek, Commissioning,
Start up dan Operation Tangguh Base project (Train 1
dan 2). Saat ini Abang sedang terlibat dalam Concept
Selection & Definition untuk Tangguh Expansion
Project.
Paper mengenai Energy Efficient LNG Production ditulis
bersama Boris Ertl dan Dugald Wright.
Boris Ertl adalah Lead Discipline untuk Gas Processing
dan LNG di BP Upstream Engineering Centre yang
berkedudukan di Sunbury-on-Thames, UK.
Berpengalaman lebih dari 25 tahun dibidang Gas
Processing dan LNG, Boris telah berkontribusi dalam
mendukung Proyek Tangguh dan Operation sejak tahun
2006.
Dugald Wright adalah Subject Matter Expert untuk
Energy Efficiency BP Upstream Engineering Centre
yang berkedudukan di Sunbury-on-Thames, UK. Doog
telah mengaplikasikan teknik modeling untuk analisa
dan optimasi Energy Efficiency Performance di berbagai
fasilitas BP termasuk Tangguh.
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