Transcript RAL Template - International Muon Ionization Cooling

Hydrogen System – Piping
and Instrumentation
Diagram
Matthew Hills
Hydrogen System P&ID
Gas Panel
Venting
Vac.
Pumps
H
H
Helium
Store
Cryostat
Heater/
Chiller
Unit
H
H
Hydrogen
Bottle
H
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Line Types and Colour Coding
Note: This scheme is based on operating the system with
Hydrogen rather than Helium.
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Nomenclature
• HA prefix used
throughout to indicate
Hydrogen System A
• Pipelines
– G or L prefix indicates
whether line will
contain gas or liquid
during normal
operation with cryocooler running.
– Pipe size specified
according to I.D. or DN
standard.
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Nomenclature (2)
H
• Valves
– All uniquely numbered
• PV – Pneumatic
Valve
• CV – Control Valve
• HV – Hand Valve
• BD – Bursting Disc
• RV – Relief Valve
– Sized by DN standard
– Set pressure shown
for relief valves
H
Matthew Hills
Nomenclature (3)
• Instrumentation
– PG/VG –
Pressure/Vacuum
Gauge
– LS – Level Sensor
– TS – Temperature
Sensor
– HD – Hydrogen
Detector
– FM – Flow Meter
• VP - Vacuum Pump
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Gas Panel and Hood
Extraction Hood
H
H
Fill/Purge Valves
Hydride Bed
Buffer Volume
Absorber Relief
Valves
H
H
Cryostat Relief
Valves
H
Matthew Hills
Hydride Bed
• Supplier: TREIBACHER INDUSTRIE AG
– The nominal figures for the absorption temperature is -10°C and
+20°C for the evolution temperature.
• Heat Transfer Medium - Water / glycolMH
• Weight: 120 kg
• Tank Structure A hull with 7 inter-connected stainless-steel storage
cylinders , each with internal coil for cooling/heating .
• Dimensions Ø370 mm × L1500 mm (not including attachments),
horizontal position
• Tank Total Weight 260-280 kg
• Operating Conditions:
– Charging Gas Component Hydrogen of 99.99% purity
– Charging Gas Pressure 1.2-1.7 bar abs
– Hydrogen Charging Rate Max 70 NL/min
– Discharging Gas Pressure 1.0-7.0 bar abs
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Fill/Purge Valves
• Pneumatically actuated valves
• Arrow indicates position on failure
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Valve Types
• Ball Valves
– Pneumatically actuated
– Spring Return Actuators ensure
valve returns to default position on
failure
• Control Valves
– Pneumatically Actuated
– Large range on throttling
– Suitable for use with hydrogen
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Relief Valves
H
H
• Tyco (AG Series 90) Relief
Valves
– Pilot valves – quick acting
– 3% tolerance on set
pressure
– Closes at 95% of set
pressure
– Response time is <0.5s
• BS&B Low Pressure Reverse
Buckling Disc
– ±5% tolerance on burst
pressure
– Vacuum/back pressure
resistant
• Hand Valves can be locked off
as necessary
H
Matthew Hills
Instrumentation
• Temperature Sensors
– Platinum Resistance
– Fast response time (<0.5s)
• Level Sensors
– AMI Capacitance Level
Transmitter
– Useable with Hydrogen
• Pressure and Vacuum Gauges
– Leybold can supply
capacitance vacuum gauges,
which are safe for use with
hydrogen.
– Explosion proof pressure
transducers available from
Honeywell
Temperature sensors
Pressure
Transducers
Level Sensors
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Cryostat
Cryocooler
Helium Jacketing
on Pipes
Compressor
Pressure
Transducers
H
Level Sensors
Pre-cooling loops
Electrical heating of
base plate
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Vacuum System
• Purging
Pump
for H2 system
H
• Cryostat
Vacuum
H
H
H
2 Elements
H
Matthew Hills
Vacuum System
•
Proposal received from Leybold
based on combination of rotary
vane and turbo-molecular pumps
– TRIVAC D40B for hydrogen
system purging pump (VP1)
– Special Pumpset with active
control suggested for cryostat
vacuum (VP2)
• D25BCS backing pump
• Turbo-molecular TMP151C
to achieve high vacuum
(10-3 mbar)
• Both pumps can be
operated with purge gas
(e.g. He) if pressure rises
(indicating a leak)
TRIVAC D40B
TRIVAC
D25BCS
TMP151C
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Venting
Whessoe – Varec
Flame Arrestor
•
•
•
•
Hydrogen detectors in extraction hood, vent line and vacuum exhaust
2 fans provide redundancy in venting from hood
Flame arrestors used throughout
Helium flow in vent line to dilute leaks
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END
Matthew Hills