Presentation Title(Front Cover ver.1)

© 2019 JGC Corporation

Effective Utilization of Boiled Off Gas(BOG) from LNG Receiving

Terminal-MixGen

JGC Technology Forum 2019

3rd July 2019Kenji KawabataSenior Process Department ManagerPT. JGC Indonesia

TM

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CG

Sakai LNG Co/Sakai

Nihon Gas Co/Kagoshima

Oita LNG Co/Oita

Saibugas Co/Nagasaki

Saibugas Co/Fukuoka

Kitakyushu LNG Co/Tobata

Chugoku Electoric Power Co/Yanai

Hiroshima Gas Co/Hatsukaichi

Osaka Gas Co/Himeji

Kansai Electric Power Co/Himeji

Osaka Gas Co/Senboku

Shimizu LNG Co/Sodeshi

Nihonkai LNG/Niigata

Tohoku Electric Power Co/Shin-sendai

Chubu Electric Power Co/Kawagoe

Chubu Electric Power Co/Yokkaichi

Toho Gas Co/Yokkaichi

Toho Gas Co/Chita-midorihama

Chita LNG Co/Chita

Toho Gas Co/Chita CO-OP Terminal

Tokyo Gas Co/Negishi

Tokyo Gas Co/Ohgishima

Tokyo Electric Power Co/Higashi-OhgishimaTokyo Electric Power Co/Sodegaura

Tokyo Gas Co/Sodegaura

Tokyo Electric Power Co/Futtsu

Mizushima LNG Co/Mizushima

Sakaide LNG Co/Sakaide

Chubu Electric Power Co/Joetsu） Hokkaido-Gas Co/Ishikari JX Nippon Oil & Energy Corp/Hachinohe

Saibugas Co/Hibiki(Under Const.)

Inpex Corp/Naoetsu

Gas Bureau, City of Sendai/Sendai

Tokyo Gas Co/Hitachi

Okinawa Electric Power Co/Yoshinoura

50 LNG receiving terminal related

projects in Japan.

LNG Receiving Terminal Excellence

JGC involved project

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What is BOG?

BOG (Boiled Off Gas) is the vapor generated due to the ambient heatinput into a LNG tank.

The composition of BOG is lighter than that of LNG. To maintain the pressure level in the LNG tank, BOG must be released

from the LNG tank.Effective BOG utilization is Key for Optimum LNG Terminal Operation

BOG

LNG Tank

Heat InputHeat Input

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Typical BOG flow

High energy consumption!!

Typical BOG treating in LNG Terminal Pressurization and injection into city gas pipeline Pressurization and utilization as fuel gas for power generation plant Re-liquefied by LNG cold energy

Re-liquefier

BOG

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JGC Proposed BOG FlowJGCʼs patented technology

Re-liquefierBO

G

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Features of GEG Low fuel gas supply pressure (0.5MPag) High efficiency under high temp condition. Enable low loading operation (10〜100%)Maintain higher efficiency even at low

load operation Quick start-up and stoppage operation

(0% to 100% load in appx. 2min)

Fuel Gas composition change resulting in Flame off (GEG Trip)

Key Technology 1- Gas Engine Generator (GEG)Key Technology 1- Gas Engine Generator (GEG)

Issue for power generation by BOG-GEG

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Key Technology 2-Mixing Drum for GEG

Patent pending.Named for a system featuring the MILD mixing of gas in a Drum.

Fuel Gas Mixing Drum developed by JGC with CFD Technology=

40MJ/Nm3

45MJ/Nm3

Pipe

0.0

0.5

1.0

1.5

2.0

2.5

3.0

0 2 4 6 8 10 12 14

6000

Calorific  value

 variatio

n rate [M

J/Nm3/min]

Without MILDrumTM

Max. 6000 MJ/Nm3/min

Calorific value variation rate can be

reduced to 1/6000

Time [min]

With MILDrumTM

Below 1 MJ/Nm3/min

～～

40MJ/Nm3 45MJ/Nm3

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Applicable not only Gas Engine Generator but also Gas TurbineGenerator.

Other fuel gas source like a biogas, LNG and LPG can be applicable. Not limited to LNG receiving terminal project, but any kind of plants.

Other Application for

(GEG or GTG) Electricity and/or Thermal Recovery

Lower Heating Value29.7 MJ/Nm3

Higher Heating Value Gas40.5 MJ/Nm3

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Simple Case Study

38.7MW x 8,000h/year x ６cent /kWh = USD 18.5 mil/year

LNG tank

BOG6.0 [t/h]

BOG Compressor

BOG Gas Engine

Pres. : 0.5 [MPaG]Temp.: 0〜60 [℃]

Electrical Power Output38.7 [MW]

To City Gas

New Income by Electricity Selling

Fuel Gas CompositionLean Rich

BOG*1 [t/h] 6.0 6.0Output [MW] 36.5 38.7

Hot Water [t/h] *2 970 1038Power efficiency 46.9% 47.3%Total efficiency 82.8% 83.7%

*1 Press. 0.5MPaG, Temp. 0〜60℃*2 Press. >0.3MPaG, Temp. 85℃

Hot Water1038 [t/hr]

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Wartsila W18V50SG 18.4MW

Configuration of GEGs ︓ 18.4MW×3 UnitsTotal available Power ︓ 36.8MW (2 running, 1 stand-by)

Main Specifications of GEGCylinders 18

Power Efficiency 50.0%(at 100% load)Engine RPM 500

Frequency（Hz） 50Dimensions（m） 18.8L×4.1W×6.1H

GEG Foot PrintGEG Foot Print 10

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30m

Total available Power ︓ 36.8.MW (2 running, 1 stand-by)

GEG Foot PrintGEG Foot Print 11

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108m

74m

GEG Foot PrintGEG Foot Print

Total available Power ︓ 36.8.MW (2 running, 1 stand-by)

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Study Reference List for Study Reference List for

Client Year Country Power Generation Capacity

Gas Company A 2014 Japan 10-15 MW

Gas Company B 2014 Japan 15MW

Gas Company C 2015 Japan 15MW

Gas Company D 2015 Japan 20MW

Electric Company A 2015 Japan 110MW

Oil & Gas Company A 2016 Japan 1.5 MW

Oil & Gas Company B 2017 Japan 7.8 MW

Gas Company E 2017 South East Asia

NA

Gas Company F 2017 EU 110MW

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Summary

• MixGen is a effective BOG utilization flow.• MixGen consists of 2 key technology components (GEG and Mildrum).• Heating Value Change Rate can be minimized by MilDrum.• LNG Terminal operation cost can be reduced by generating electricity

and heat recovery (steam and/or hot water) by MixGen.

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