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CRYOGENIC ENGINEERING

CRYOGENIC ENGINEERING

Cryogenic Insulation work

KD ONE is successfully carrying out cryogenic insulation work for various projects such as Tongyeong, Pyeongtaek, and Samcheok LNG tanks, starting with charging work for industrial ultra-low temperature liquefied gas storage tanks, including Incheon LNG acquisition base.

CRYOGENIC ENGINEERING

Features

Advantage of KD ONE’s CRYOGENIC ENGINEERING

1. Reduction of the period of construction - Excellent capacity of filling facilities.

Item	Unit	Perlite filling equipment of KD ONE
Item	Unit	Competitors	KD ONE
Perlite Filling Equipment Production Standard	m³/hr	15	30
Daily Working Hours	hr/day	20	20
Production Volume	m³	300	600
Volume for Filling	m³	10,000	10,000
Construction Period	day	33.3	16.6
Construction Period Reduction	day	16.7
Efficiency	%	50

· Daily working hours (calculated by considering 80% efficiency based on 24-hour operation)

2. Internal vibrator system

· Internal vibrator system prevents icing on the outer wall of the tank and minimizes perlite settlement even when the tank is operated for a long time, preventing the increase of the BOG (boil off gas).
· Accurate and stable construction is possible through the filling system using remote control and automatic leveling using sensors.

Use	1. Minimize submersion of perlite in the future by forcibly hardening the perlite. 2. Application when PUF is constructed inside the outer shell of the tank or concrete is constructed outside and external vibrating is impossible 3. Efficiency : 10~12%
Advantage	1. The world's first automatic equipment system (US certificate) through an electric cable 2. Automatic filling system reduces filling time by half 3. Remote control system through PC monitoring 4. Automatic leveling and filling rate calculation
Results	Applied on LNG Storage Tank in Tongyeong, Pyeongtak, Incheon, Gwangyang and etc. Applied on LNG Storage Tank in Yemen, Mexico, Angola, Singapore, Malaysia, Kuwait and etc.

3. Good quality - Perlite transfer system using pneumatic conveyor

	Type	Conveying velocity	Friction rate	Crushing perlite	Density
KD ONE	KD Perlite pneumatic conveyor system	8m/sec	1	Few	Low
Competitors	Blower types	15m/sec	5.29	Many	High

Quality of expanded perlite

Physical properties	Recommendation criteria	Test value	Technology
Density	Compacted den: 48~65kg/m³	Loose Density: 35~50kg/m³ Compacted Density: 48~65kg/m³	Perlite sampling: After conveying
Particle Size	-0.15mm(max30%)	-0.15mm(max30%) After conveying	Low velocity conveying system(8m/s) -Low crushing perlite
Water Contents	0.5wt% or less	0.1wt%	-If perlite have more moisture, it causeincreasing the purge gas quality for drying moisture. >>Also increasing the cost for purge gas(N₂gas)
Thermal Conductivity	0.044w/mk (at 20℃)	0.042w/mk (at 20℃)	Low thermal conductivity cause low density,decreasing the dust and moisture.