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Status of Hydrogen System DevelopmentStatus of Hydrogen System Development

MICE Collaboration Meeting, Frascati, June 26-29, 2005

Yury Ivanyushenkov, Tom Bradshaw, Elwyn Baynham, Mike Courthold, Matthew Hills, Tony Jones

Applied Science Division,Engineering and Instrumentation Department

RAL

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• Hydrogen system:

- principal points

- process and instrumentation diagram (PID)

- layout

• Hydrogen R&D:

- motivation and scope

- work packages

- components

- layout

• Plans

Scope

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• 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.

Conceptual points

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MICE hydrogen system layout: Principle

Hood

MICE

Cabinet for hydride bed and pipework

H2sensorArgon Jacketing

Safety area

1m3

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

5Pressuregauge

Non-return valve

P P VP Vacuum pumpBursting diskPressure relief valve

ValvePressureregulator

Pre-coolingOut In

Metal Hydride storage unit

(20m3 capacity)

Purge valve

0.5 bar

0.9 bar

H2 Detector

P

P

VP1

VP2

Purge valve

Chiller/Heater

Unit

1 bar

PP

0.5 bar

0.9 bar Helium supply

Hydrogen supply

High level vent

Buffer vessel

Vent outsideflame arrester

Extract hoodH2Detector

PP

Nitrogen supply

PP

PP

1 m3

Hydrogen zone 2

Vent manifold Vent manifold

P1

PV1

PV7

PV8

PV2

PV3

PV4

HV1

Fill valve

Tbed

HV2

HV3

P3

P

P2

PV6

High level vent

Non return valve

0.1 bar

MICE hydrogen system (familiar sketch)

Liquid level gauge

Internal Window

LH2 absorber

Safety windows

Vacuum

Vacuum vessel

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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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•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

Hydrogen system development: Scope

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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 to be completed.

Hydrogen system development: Scope (2)

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• WP1 Initial design -> Internal safety review

• WP2 Detailed design and procurement

• WP3 Installation and commissioning

• WP4 Test Programme

Hydrogen system R&D: Work packages

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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: WP1

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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: WP1 (2)

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Conclusion of WP1

• 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: WP1

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Tchill

Pressuregauge

Non-return valveP P VP Vacuum pumpBursting diskPressure

relief valveValvePressure

regulator

CoolantOut In

Test absorber assembly

Metal Hydride storage unit

(20m3 capacity)

Purge valve

0.5 bar

0.9 bar

H2 Detector

P

P

VP1

VP2

Purge valve

Chiller/Heater

Unit

1 bar

PP

0.5 bar

0.9 bar Helium supply

Hydrogen supply

High level vent

Buffer vessel

Vent outsideflame arrester

Extract hoodH2Detector

PP

Nitrogen supply

PP

PP

1 m3

Hydrogen zone 2

Vent manifold Vent manifold

P1

PV1

PV7

PV8

PV2

PV3

PV4

HV1

Fill valve

Tbed

HV2

HV3

P3

P

P2

PV6

High level vent

Non return valve

0.1 bar

Hydrogen system test rig

Mass spectrometer

M. F.M.

Mass flow meter

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Hydrogen test cryostat: Concept

T H

T H

• 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 =height=290mm

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Hydrogen Test Cryostat Outline

1120

Ø 580

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Hydrogen test cryostat

Condenser

LH2 dummy absorber

Level sensors

Cryocooler SRDK-4151.5 W @4.2K35/45 W @50K

Radiation shield

Hydrogen inlet and outlet

He inlet and outlet

Cu bottom plate with heat exchanger

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Hydrogen test cryostat (2)

Cu bottom plate with heat exchanger

Cartridge heaters

Finned top plateof condenser

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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)

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Control system

- Initial control sequence diagrams have been developed (example)

- Will be revised and completed

- Talking to ISIS and DL experts on hardware implementation

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Chiller onSet Tchill = Tchill_initial

Start PV1,2,3,4 closed

VP1 on, PV6 Open

Cooling system OnStart Pressure Control Loop

Start Vac MonitorOpen Pv1,Pv2

Tbed<Tbed1And

P3<1.e-5

P1Pset1

Close PV1,PV2Stop Pressure Control Loop

Set Tchill = Tchill_lowOpen PV3

Hlevel>Hlevel1

H2 System Ready

Increment/DecrementTchill

EmptySequence

P3<1.e-5

Vac monitor

Pressure Control

Yes

No

Yes

No Yes

No

Provisional Hydrogen System Control Sequence

Control logic – Fill Sequence

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(1600)φ216.3

140

(1810)

2-Rc3/4Relief valve

Filter

Valve

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 R&D: Layout

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Hydrogen R&D: Phase I initial

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Hydrogen R&D: Phase I initial (2)

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Hydrogen R&D: Phase I final

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Hydrogen R&D: Phase I final (2)

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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

Hydrogen system R&D – Schedule