Hydrogen Valve
From Roads2HyCom Hydrogen and Fuel Cell Wiki - A Reliable Source of Information - Edited by Technology Experts Only
Contents |
Metrics Table
| METRIC | SUB-METRIC | UNITS | RATING | DATA | SECTOR |
| Technology Accessibility | Compatibility with existing consumer technologies | 0-4 | 3 | (cryogenic valve) | Transport |
| 4 | (flexible hose) | all | |||
| Number of companies selling the technology | number | 4 (Dynetek, Quantum, GFI, WEKA cryogenic components) | Transport | ||
| - | N/A | Stationary | |||
| - | N/A | Portable | |||
| Probability of market co-existence with current (competing) technology | 0-4 | N/A | - | all | |
| N/A | - | all | |||
| N/A | - | all | |||
| Capacity & Availability | Capacity to meet user’s needs | 0-4 | N/A | - | Transport |
| N/A | - | Stationary | |||
| N/A | - | Portable | |||
| Number of hours per year during which technology is available | hours/year | - | N/A | Transport | |
| - | N/A | Stationary | |||
| - | N/A | Portable | |||
| Durability of technology | hours, km, cycles | - | >60000 km | Transport | |
| - | N/A | Stationary | |||
| - | N/A | Portable | |||
| Cost (click here for more datails) | Capital investment for technology | EUR | - | Valve € 30-520 a piece, Fitting EUR 37-55 a piece, copper gasket EUR 1,65 a piece[1] | all |
| Cost of ownership for consumers (e.g. Maintenance) | EUR / year | - | N/A | Transport | |
| Safety | Technology breakdown (including misuse) | no. / year | - | N/A | all |
| Severity of failure | 0-4 | N/A | - | all |
Summary
The need of special types of valves, tubes and sealings arises due to use of hydrogen at very low temperatures or high pressures. A compact cryogenic valve has been developed by WEKA for handling low temperature liquefied gases. Due to their compact size they can be used for transport applications. Also flexible hoses capable of handling the high pressure hydrogen are being developed. Four producers, namely, Dynetek, Quantum, GFI, WEAK-cryogenic components, are the known producers of valves suitable for hydrogen applications. Several automobiles are using the WEKA compact cryogenic valves, one of them has already logged 60000 km on the road.
Operating principles of other popular valves:
- Membrane: Diaphragm valve
- Gate: Gate valve
- Ball: Ball valve
Key Issues
The durability of valves, tubes and sealings may be critical for cryogen applications because of high temperature gradients across the component. This probable leads to a stringent selection of necessary materials (which may be expensive).
Data Lacking
Information about valves, tubes and sealings for stationary and portable applications have not been assessed so far. Information about durability and safety of these components is also missing.
References
- David Brütsch, Fridolin Holdener
Compact Cryogenic Valves for Liquefied Hdrogen Fuelled Cars
WHEC 16, Lyon France, 13 - 16 June 2006
- N.N.
Specification sheet: 350 bar In-Tank valve
GFI control systems
- N.N.
Manual: In-Tank pressure regulators H2R5,000 & H2R10,000
Quantum technologies
- N.N.
Manual: Excess slow valve VA-EF-01-0
Dynetek Industries Ltd.
Notes
- ↑ Swagelok online catalogue
