composite concrete cryogenic tank (c t): a precast concrete … · 2019-01-19 · covered by...
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© 2013 Chevron U.S.A. Inc.
<Title of Presentation>
By: <Author Name>, <Organization>
<Date>
<Title of Presentation>
By: <Author Name>, <Organization>
<Date>
17th INTERNATIONAL CONFERENCE & EXHIBITION
ON LIQUEFIED NATURAL GAS (LNG 17)
Composite Concrete Cryogenic Tank (C3T):
A Precast Concrete Alternative
for LNG Storage
By: Kimberly Hoyle, Chevron Energy Technology Company
April 18, 2013
17th INTERNATIONAL CONFERENCE & EXHIBITION ON
LIQUEFIED NATURAL GAS (LNG 17)
© 2013 Chevron U.S.A. Inc.
C3T
Composite Concrete Cryogenic Tank
2 2
Past Present Future
Photo courtesy BergerABAM
© 2013 Chevron U.S.A. Inc.
C3T is…
Composite Concrete Cryogenic Tank
Full containment LNG
storage
A modern, safer version of
a proven concept
– 19 concrete LNG tanks
built between 1950-1980
– Some are still in service
today in Philadelphia and
Barcelona
3
© 2013 Chevron U.S.A. Inc.
C3T is…
Composite Concrete Cryogenic Tank
4
Approx. panel dimensions: 34m x 3.6m x 0.3m - 0.45m
Approximate panel weight: 100 tons each
158 FT
48 M
112 FT
34 M
275 FT
84 M
Photo courtesy DN Tanks
© 2013 Chevron U.S.A. Inc.
C3T is…
Composite Concrete Cryogenic Tank
Inner and outer tanks walls
assembled from
precast, prestressed
concrete panels with an
integrated carbon steel
vapor barrier on the outside
surface.
Tank Walls are wrapped with
high strength prestressing
strand, which is then
covered in shotcrete.
5
© 2013 Chevron U.S.A. Inc.
C3T is…
Composite Concrete Cryogenic Tank
6
Photo courtesy DN Tanks
© 2013 Chevron U.S.A. Inc.
7
Secondary Tank Liner
Secondary Tank Wall
Circumferential
Prestressing Strands
Covered by Shotcrete
High-Strength Steel
Hold Downs
Perlite
Shotcrete Cover
Primary Tank Liner
Primary Tank Wall
LNG Liquid
9% Ni Steel Tank Floor Plate
Tank Bottom Insulation
9% Ni Steel
Subfloor Plate
Embedded
Heating Conduit
Concrete Base Slab
Compressed Wood
© 2013 Chevron U.S.A. Inc.
8
© 2013 Chevron U.S.A. Inc.
C3T – A Comparison with Conventional
LNG Storage Tanks for 160,000 m3, USGC
9
9Ni Steel
Tank
C3T
Inner tank 9% Nickel
Steel
PC/PS concrete panels with
thin CS liquid/vapor barrier
Outer tank Cast-in-place
Concrete
PC/PS concrete panels with
thin CS liquid/vapor barrier
TIC Reference 10-15% savings
Schedule Reference 6-8 months improvement
© 2013 Chevron U.S.A. Inc.
C3T – A Comparison with Conventional
LNG Storage Tanks for 160,000 m3, USGC
10
9Ni Steel
Tank
C3T
HES Reference Reduced number labor hrs
at elevation
Construction
Logistics
Reference Can reduce onsite labor
requirements
Reduction in high-skill labor
requirements
Design /
Construction
Method
Standardized
/one-size-fits-
all approach
Can be adjusted to fit the
needs of individual plants.
© 2013 Chevron U.S.A. Inc.
C3T’s Flexibility in Design:
Tank Construction Fit to Project Constraints
C3T is comparable to modular
construction.
Prefabricated wall panels can…
move significant amount of work
away from construction site.
move work to ground that usually
occurs above grade with
conventional tanks.
help sites with high labor costs,
constricted lay-down space, and
weather interference.
11
Photo courtesy DN Tanks
© 2013 Chevron U.S.A. Inc.
C3T –
Current Status
Base design by JIP, with
improvements by Chevron
Chevron developed initial
construction procedures
Chevron is conducting
laboratory material
qualification testing, in
progress
NFPA 59A now refers to
ACI 376 in lieu of
ACI 318
12
Photos above courtesy
WMT&R, Inc.
Photos above
© Commonwealth
Scientific & Industrial
Research Organisation:
CSIRO 2013
© 2013 Chevron U.S.A. Inc.
C3T –
Next Steps
2013
Material Qualification Testing to be completed in 2013
Expected DNV “Fitness for Service” certification
2014 and beyond
Constructability test to demonstrate that the wall
panels can be fabricated, erected, and joined within
required tolerances, cost and schedule
Deployment to a Major Capital Project
13
© 2013 Chevron U.S.A. Inc.
Conclusion
14
260 ft X 112.16 ft primary tank
(79.25 m X 34.2 m)
160,000 m3
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