LNG Vaporizer as FGSS (Fuel Gas Supply System)

Diffusion bonded compact HX application for offshore

DCHE is applicable to wide range of offshore use such as followings.
High pressure use and small foot print, such as:

Natural gas heat exchanger for BOG Partial re-liquefaction system.
High pressure hydrocarbon gas cooler for FLNG and FPSO.
LNG vaporizer for FSRU and Fuel Gas Supply System.
Replacement with Shell & Tube type HX

Why is DCHE the best LNG vaporizer for ships?

Performance required of LNG vaporizer for "Fuel Gas Supply System"

1. Compact and light weight
It can be easily installed in limited space on a ship.
High flexibility for piping layout
2. High reliability
Excellent pressure resistance and thermal stress resistance.
Measures against freezing of hot water and GW, which are heat sources, can also be reflected.
3. Stable vaporization performance (microchannel technology)
The channel diameter is less than 1/10 that of the Shell & Tube type, excellent in heat transfer performance, and stable flow condition.

Two unique structure
(Freezing control + high heat transfer performance)

1 Cold: 3 Hot Design (Patented design)

Freezing control measures (increase of wall temp.)

HOT2 does not touch COLD (LNG).
HOT2 can be used to control the ice accretion level of HOT1.
(To prevent the HOT flow path from being completely blocked)

2 Zone Design (patent pending)

Measures to prevent freezing of heating medium at vaporizing zone and splash entrainment (increase of wall temp.)

Item	Heating zone (NG)	Vaporizing zone (LNG)
Channel pattern (Heat transfer efficient)	Wavy (High)	Straight (Normal)
Heat transfer area × efficient	High	Low
Wall temp.	High (Due to high heat transfer efficient)	High (by heating medium temp.)

Example of "DCHE Evaluation test" for LNG Vaporizer

Evaluation test of Freezing countermeasure case

Freezing condition evaluation test using LN2 (300 bar) and G.W.

Performance Evaluation Test under Low Pressure LNG + Special structure (1 cold: 3 hot + 2 Zone design)

Test condition

LNG flow rate: 150Nm³/hr
LNG Pressure: 6.5bar
LNG temp.: -125 °C (Design temp/: -160 °C)
Heating medium: Hot water
H.W. temp.: 50 °C/40 °C
H.W.flow rate: 9700 kg/hr

KSL confirmed characteristic structure of the DCHE (1: 3 & 2 Zone Design) are effective by two evaluation tests.

Contact

Sales & Marketing (Tokyo Office), Static Equipment Section Energy & Chemical Machinery Department: TEL: +81-3-5739-6652

Inquiry

Engineering Section (Takasago Equipment Plant), Static Equipment Department Industrial Machinery Division Energy & Chemical Equipment Business Unit (Hyogo): TEL: +81-79-445-7214

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