Transcript Hydrogen system R&D R&D programme – general points •Hydrogen absorber system incorporates 2 novel aspects •Hydrogen storage using a hydride bed •Hydrogen absorber.

Hydrogen system R&D
R&D programme – general points
•Hydrogen absorber system incorporates 2 novel aspects
•Hydrogen storage using a hydride bed
•Hydrogen absorber with cooling from a cryocooler
•R&D programme is an important element to reduce both
technical and financial risk and to develop the safety case
•Aim is to develop an integrated programme for the absorber and
hydrogen system involving international groups within the
MICE collaboration – two strings
•Hydrogen system R&D - to be done at RAL – located in the MICE Hall
– essential to development of expertise and safety approval
•Absorber R&D – to be done within the Collaboration
•Aim for the two elements finally to be brought together at RAL
R&D system layout
•Can replace the overall system slide which follows by the slide
of the R&D system if you think it is better for this presentation
Hydrogen System Baseline layout
High level vent
High level vent
Non return
valve
Vent manifold
0.1 bar
Hydrogen zone 2
Vent
outside
flame
arrester
Vent manifold
H2Detector
Extract hood
VP2
PV8
P
P1
PV7
P
PV2
Buffer
3
vessel 1 m
Hydrogen
supply
P
P
PV1
Metal Hydride
storage unit
(20m3 capacity)
1 bar
Tbed
PV3
PV4
Fill valve
P
HV1
Coolant
Out In
P2
P
0.5 bar
0.9 bar
P
P
P
P3
P
HV2
Purge valve
P
H2 Detector
Safety window
Purge valve
HV3
Absorber window
Nitrogen
supply
0.9 bar
PV6
Helium
supply
0.5 bar
VP1
P
Pressure
gauge
P
Pressure
regulator
Valve
Pressure
relief valve
Non-return
valve
Bursting disk
VP
Vacuum pump
Chiller/He
ater Unit
Hydrogen System Development – Scope (1)
•To construct a prototype hydrogen handling system at RAL
which will become the first full system of MICE
•This will consist of 2 main parts
•The external system – which will be in the final form
•to deliver H2 to the absorber and store the H2 in the
hydride beds
•The safety system to vent H2 in failure modes- to
include relief valves and buffer volume
•The dummy absorber
•The absorber will be simulated by a simple cryostat
with a containment vessel to contain 20litres H2 –
operated from a condensing pot with a cryocooler
Hydrogen System Development – Scope (2)
The development programme will address the following
issues:
•Confirm the working parameters of a hydride bed in the
regimes of storage, absorption and desorption of
hydrogen ?
•Purity of hydrogen and effects of impurities.
•Hydride bed heating/ cooling power requirements.
•Instrumentation and control required for the operation of
the system
•Safety aspects including - safety relief valves, sensors
and interlocks and safety documentation
•The R&D programme will enable the final design for the
MICE hydrogen system to be confirmed and the HAZOP
Hydrogen System R&D WP(1)
Initial Design
•H2 handling system
•Confirmation of
•components on H2 circuit diagram
•pipe sizes, mass flows, pressure drops, relief valve
specifications, venting, manifolding
•Vacuum and purging systems
•layouts in hall
•H2 zones
•Basic specifications for purchased items
Hydrogen System R&D WP(1)
Initial Design
•Dummy absorber
•Cryostat design
•H2 containment vessel, condensing pot, internal
pipework components
•Pre - cooling – heat exchanger etc
•Heater for load simulation and H2 boil off
•Instrumentation
•Data acquisition
•Outline definition of test programme and proposals for
fault condition simulation
Hydrogen System R&D WP(1)
Conclusion of WP(1)
•Update cost estimates for main components
•Internal Engineering and Safety Review
•Aim will be confirm the scope of the R&D programme
and release the stage of WP2 – detailed design and
procurement
Hydrogen System R&D WP(2)
Detailed design- Procurement – Installation
•Detailed design of manufactured components – cryostat
+ dummy absorber, buffer volume
•Specification of commercial items – hydride beds, relief
valves, vacuum systems
•Definition of installation procedure and specification of
infrastructure such as manifolds for installation
•Procurement of components
•Preparation of operation and test procedures
•Preparation of safety case
Hydrogen System R&D WP(2)
Conclusion of WP(2)
•Update of Engineering and Safety Review
•Aim to include additional aspects based on
•More detailed procedures for operation and test
•HAZOP
Hydrogen System R&D WP(3)
Installation and commissioning
•Installation of system components
•Subsystem test and commissioning
•Proof of gas handling with He
•Leak testing
•Check instrumentation and overpressure valve operation
•Check precooling and cryocooler operation
•Review and permission to operate with H2
Hydrogen System R&D WP(4)
Test Programme
•Purging sequence
•H2 transfer into hydride bed
•Local operation of hydride bed
•Initial transfer of H2 into dummy absorber
•Dummy absorber cooldown, fill and warmup
•H2 filling /emptying
•H2 return to hydride bed
•System control
•Fault scenarios
•Vacuum failure test of venting
Hydrogen System R&D Schedule
Outline Schedule
•WP1 Initial design Jan – May 05
•WP2 Detailed design and procurement June – Dec 05
•WP3 Installation and commissioning Jan – April 06
•WP4 Test Programme June – Oct 06
Absorber R&D
Absorber R&D - scope
•Scope
•Modelling and operation of a dummy absorber from a
cryocooler system
•Simulation of final system thermal and operational
conditions
•Proof of principle for absorber supports and shielding
•Specific demonstration of operation at helium temperatures
with liquid helium using a cryocooler – establish margins
• The aim will be to undertake this programme using the resources of the
International Collaboration – the specific UK role in this is still to be defined
– funds identified to ensure the programme is viable
Absorber R&D
MICE Absorber
R&D module
concept