JIP CRYTRANSFER external

JIP CRYTRANSFER

Collaboratieve research on LNG bunkering with hoses | Bas van den Beemt

BACKGROUND: JIP CRYTRANFER

LNG transfer with cryogenic hoses is an enabling operation for

offshore LNG bunkering:

Determining the safe operating envelope for offshore LNG bunkering, is a

key uncertainty in offshore LNG bunkering operations;

Limited data available from large bore (>8”) offshore LNG transfer systems

(EN1474) testing and qualification (e.g. dynamic stiffness and pressure

drop);

Testing at cryogenic conditions and with LNG flow is inevitable for

validation of ‘mechanical’ and ‘flow’ hose models.

In addition: LNG flow testing offers a platform to evaluate the accuracy of

in-line flow measurement systems and its process design.

donderdag 9 juli 2015 2 | CRYTRANSFER

Offshore STS LNG transfer

showcased in Japan,

KLAW system, SPT Ltd. operation

PARTICIPANTS AND THEIR OBJECTIVES

Development of safe and reliable “Offshore LNG bunkering”, with

Predictable pressure drop in cryogenic hoses;

Accurate in-line flow measurement;

Predictable mechanical loads and shape from cryogenic hoses.


MECHANICAL HOSE MODEL: GOAL I


-0.02 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16-5

0

5

10

15

20

25

30

axial strain [-]

axia

l for

ce [k

N]

Ambient

Cryogenic

tensile cryogenic Ffail = 600 kN (≈ 180 bar)

Reference: MWAP+MWL = 10.5 bar + 6.5 kN mass ≈ 40 kN

TNO reference:

Building block program static hose testing Determine ‘hose end fitting loads’ and ‘hose

shape and deformation’ for different offshore

LNG bunkering configurations with hoses;

Determine generic operating envelope for

Offshore LNG bunkering (e.g. reach and sea

conditions);

Optimised design of of a hose-based LNG

bunkering system;

Additionally: Determine hose qualification (test)

requirement for LNG transfer.

Simplified

calculation

method

MECHANICAL HOSE MODEL


To be

generated and

owned by hose

suppliers

Test methods

and

measurements

to be used

Only for

model

validation Description of

“material input

card” for COTS

FE software

Transfer

system

designer in-

and output

RESEARCH APPROACH: MECHANICAL HOSE MODEL

Define and execute test to characterise the hose stiffness

Tension/torsion and (shallow) bending;

Stiffness will be a function of pressure, temperature and hose service life

Develop a FE model based om beam element

Description of material model based on measured data

Test cases in TNO’s choice of software

Verification of FE predictions on 1 / 2 example configurations

End fitting loads

Hose shape; local deformations

Feasibility

Use in COTS FE code

Simplified analyses


Test method;

Measurement protocol;

2” test data

Description of material

model

Limited validation of

model on 2

configurations

Feasibility to

generalise

OPTIONAL: Larger diameter (~4”)

validation TBD with late participants

FLOW MODEL: GOAL II

Improved model for pressure drop at LNG transfer conditions

Determine friction coefficient as function of pressure

Optimize diameter and flow rate for LNG transfer with hoses

Additional: Determine accuracy of in-line LNG flow measurement:

Comparison flow metering: e.g. Coriolis, Ultrasonic, level

Integration of flow measurement in LNG bunker system

Optimise process design for LNG bunkering with hoses

Advise on adjusting standards/guidelines on pressure loss

Conclusion from LNG flow testing:

Pressure dependent hose friction coefficient

RESEARCH APPROACH: FLOW MODELLING


Tank trailer

sensor

Storage Facility

sensor P2 P1

Φ2 Φ1

Test: trailer delivering LNG to tank station

2” multi composite hose

2” metal hose

Pressure drop as function of flow rate and pressure

Comparison flow metering

Integration in-line flow

measurement

OPTIONAL: Larger diameters

and flow rates TBD with late

participants

ORGANISATION: JIP CRYTRANSFER

Founding partners:

TNO research contractor and coordinator;

Rolande LNG contracting partner flow test;

Confirmed Participants: Shell (mech.

model), Gutteling (supply hoses), Flexim

and Suneti (flow measurement).

Open for late Participants

Funding:

Dutch innovation funding (Confirmed);

Cash contributors (confirmed);

Shell, Gutteling and The Dutch National

LNG Platform.


Budget (210kEuros):

Mechanical modeling (150 kEuros);

Flow testing (60kEuros);

Extra budget: late participants fee (TBD)

will be applied in the research (e.g. larger

diameters, different set-ups).

Scope and planning:

• Detailing of scope with all participants in

Steering Committee;

• Kick-off planned for January 2016.

INTERESTED IN PARTICIPATION?

Please contact: Bas van den Beemt

TNO GEO-ENERGY

[email protected]

+31 65 199 3441

OTHER TNO R&D COLLABORATION ON LNG

Currently running Joint Industry Projects (JIPs):

LNG SAFETY PROGRAM: LNG component failure testing and modelling (e.g. tanks, loading equipment)

CRYOCOMPOSITES: LNG material and construction research

CRYHOSE: Life time extension of LNG refuelling hoses

11 TNO’s research on composition, construction and safety of cryogenic tanks

JIP CRYTRANSFER external

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