Metal hydride storage canisters (MHS)
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Description
METAL HYDRIDE STORAGE CANISTERS
Compact and safe hydrogen storage at low pressure.
The metal hydride storage canisters (MHS) from Heliocentris Academia GmbH allow safe and compact storage of relatively large amounts of hydrogen at low pressures. Heliocentris’ metal hydride storage canisters can store a multiple amount of hydrogen in comparison to a pressure storage at low pressure.
The metal hydride storage canisters are available in three different dimensions with storage capacities of 200 Nl, 400 Nl and 800 Nl hydrogen at 25 bar filling pressure.
The MHS 200 and MHS 400 storages comply with the Art. 4.3 and the MHS 800 with the category 1 of the pressure equipment directive lowering the barriers of hydrogen usage in contrast to pressure storage devices.
Technology
- The Heliocentris metal hydride storages are equipped with a low temperature AB2 metal alloy on a TiMg base:
- absorb the hydrogen in the alloy lattice after adsorption at the surface
- can store hydrogen at high volume- and low weight density (ideal for stationary application)
- has a low plateau pressures at about room temperature
- has a low thermal conductivity
The canister is designed as a passive surface cooled system. Heat ducting can be applied by the user with air ventilation or water cooling.
Temperature Handling
The nominal parameters of the canister are defined for a canister surface temperature of 20°C. The absorption/ desorption performance of the storage can be sensitively influenced by thermalizing the canister surface by:
- cooling the storage surface for absorption (filling) by water or air with 5 5 20°C
- heating the storage surface for a continuously desorption by water or air with 20 5 50°C
- usage of the ambient air with passive or active ventilation
Integration, Usage and Safety
An integrated quick coupling allows an easy and safe connection to an individual hydrogen source. The storage is equipped with a pressure and temperature relief valve to avoid dangerous conditions.
| Metal Hydride Storage Canister | MHS 200 | MHS 400 | MHS 800 |
| PS (max. filling pressure level according to PED)1 | 25 bar (362.6 psi) | ||
| Max. coupling pressure of quick coupling | 17.2 bar (250 psi) | ||
| TN (Nominal temperature)2 | 20 °C | ||
| Operation temperature | -5 ... 55 °C | ||
| Thermalization temperature3 | 5 ... 50°C | ||
| H2-Purity | Min. 5.0 (99.999 %) | ||
| H2 Capacity (@ 20 °C and 25 bar) | 200 Nl | 400 Nl | 800 Nl |
| H2 Capacity (@ 20 °C and 15 bar) | 150 Nl | 300 Nl | 600 Nl |
| H2 Capacity (@ 20 °C with HG) | 60 Nl | 120 Nl | 240 Nl |
| Nominal discharge rate | 1 Nl/min | 3 Nl/min | 4 Nl/min |
| Total weight | 2.2 kg | 4.2 kg | 7.3 kg |
| Overall length | 310 mm | 310 mm | 470 mm |
| Diameter | 70 mm | 102 mm | 102 mm |
| Bottle volume | 0.5 l | 1.0 l | 2.0 l |
| Type of connectors | Parker 4M-Q4CY-SSP | ||
