Status of Hydrogen System Development

1
Status of Hydrogen System Development
Yury Ivanyushenkov, Tom Bradshaw, Elwyn Baynham,
Mike Courthold, Matthew Hills, Tony
Jones Applied Science Division, Engineering and
Instrumentation Department RAL
MICE Collaboration Meeting, Frascati, June 26-29,
2005
2
Scope

• Hydrogen system
• - principal points
• - process and instrumentation diagram (PID)
• - layout
• Hydrogen RD
• - motivation and scope
• - work packages
• - components
• - layout
• Plans

3
Conceptual points

• Individual hydrogen system for each of 3
  absorbers.
• Use of a metal hydride bed for hydrogen storage.
• Compact location of the components under
  hydrogen extraction hood
• close to the absorber.

4
MICE hydrogen system layout Principle

• Argon jacketing of pipework is proposed in
  outside the hood. Basic philosophy is shown below

H2sensor
Hood
Argon Jacketing
1m3
Cabinet for hydride bed and pipework
MICE
Safety area
5
MICE hydrogen system (familiar sketch)
High level vent
High level vent
Vent outside flame arrester
Non return valve
Vent manifold
Vent manifold
0.1 bar
Hydrogen zone 2
Extract hood
VP2
PV8
P1
P
Metal Hydride storage unit (20m3 capacity)
P
PV7
P
PV2
PV1
Chiller/Heater Unit
1 bar
Tbed
Buffer vessel
Hydrogen supply
PV3
1 m3
PV4
P
Fill valve
P
HV1
Pre-cooling Out In
P2
P
0.5 bar
0.9 bar
Liquid level gauge
P3
HV2
Internal Window
P
P
Purge valve
P
P
P
LH2 absorber
Safety windows
Vacuum
Purge valve
HV3
Vacuum vessel
0.9 bar
Nitrogen supply
PV6
Helium supply
0.5 bar
VP1
Pressure gauge
Non-return valve
Pressure relief valve
Pressure regulator
Bursting disk
Valve
P
P
VP
Vacuum pump
6
MICE hydrogen system PID
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MICE hydrogen system layout
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MICE hydrogen system layout (2)
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Hydrogen system development Scope

• 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 20
  litres of H2 operated from a condensing pot
  with a cryocooler

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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 RD programme will enable the final design
  for the MICE hydrogen system to be confirmed and
  the HAZOP to be completed.

11
Hydrogen system RD Work packages

• WP1 Initial design -gt Internal safety review
• WP2 Detailed design and procurement
• WP3 Installation and commissioning
• WP4 Test Programme

12
Hydrogen system RD WP1

• 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

13
Hydrogen system RD WP1 (2)

• 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

14
Hydrogen system RD WP1

• Conclusion of WP1
• Update cost estimates for main components
• Internal Engineering and Safety Review
• - Aim will be confirm the scope of the RD
  programme and release the stage of WP2 detailed
  design and procurement

15
Tchill
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Hydrogen test cryostat Concept

• Instrumentation mimics what we will need on the
  absorber for the control system and interlocks
• Heater will regulate temperature of cryocooler
  need redundancy and interlock with compressor
• Dia.Reservoir height290mm

T
H
T
H
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Hydrogen Test Cryostat Outline
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Hydrogen test cryostat
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Hydrogen test cryostat (2)
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Instrumentation

• Capacitance-based level sensors (2 or even 3)
• (communicating with a supplier concerning choice
  of a sensor)
• Temperature sensors (PRTs)
• (standard components of any cryogenic system)
• Cartridge heaters
• (standard components)

21
Control system

• Initial control sequence diagrams have been
  developed
• (example)
• Will be revised and completed
• Talking to ISIS and DL experts on hardware
  implementation

22
Provisional Hydrogen System Control
Sequence Control logic Fill Sequence
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Metal hydride tank
Table 1 The specification of the MH tank for
RAL   Hydrogen Storage Capacity
20 Nm3 Tank
Description Heat Transfer Medium

Water MH Weight

155kg Tank Total Weight

220 Kg Operating Condition Charging Gas
Component
Hydrogen of 99.99 purity Charging Gas
Pressure
1.2 barA Hydrogen Charging
Rate
70NL/min (up to 90 of Storage
Capacity) Discharging Gas Pressure
1.2
barA Hydrogen Discharging Rate
70NL/min (up
to 90 of Storage Capacity) Utility
Requirements Cooling Medium

Water Below -10? (At 20L/min) Heating Medium

Above 20? (At 20L/min)

• Status
• Waiting for a new quotation from the supplier

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Hydrogen RD Layout
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Hydrogen RD Phase I initial
26
Hydrogen RD Phase I initial (2)
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Hydrogen RD Phase I final
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Hydrogen RD Phase I final (2)
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Hydrogen system RD Schedule

• Outline Schedule
• WP1 Initial design May August 05
• with Review in September 05
• WP2 Detailed design and procurement Aug 05 Feb
  06
• WP3 Installation and commissioning Jan April
  06
• WP4 Test Programme June Oct 06