Hydrogen Production System
Electrolysis Stack
The Hydrogen Production System (HPS) consists of Alkaline Water Electrolysis (AWE) units, gas-liquid separators, purification systems, and auxiliary components. A single-stack system has a capacity of...
Key Characteristics
Enhanced electrode design and nickel-plating process, resulting in improved performance.
Innovative diaphragm materials and technology enable higher current density while promoting environmental sustainability.
Improved gasket and frame sealing in the bipolar plate design ensures an extended lifespan.
Refined gas-liquid flow field design enhances flow equalization efficiency.
Specifications and Technical Details
| Hydrogen production | 1 to 5000 Nm3/hr |
| Hydrogen purity | 99.95% Hydrogen or 99.9995% high purity hydrogen option |
| Hydrogen dew point | H2O < 5 ppm (-65 oC to < 5 ppm) |
| Hydrogen delivery pressure | 1-30 bar (g) |
| Oxygen | Recovery not possible |
| Electrolyte | 30 % KOH |
| Power requirement | 5.8 kW/Nm3 -H2 to 1250 kW |
| Utilities required from customer | Power, Deionized Water, Cooling Water |
| System Energy Consumption (per kg H2) | 46-55 kWh/kg |
Process Flow Diagram
Gas Separation System
In this system, hydrogen and oxygen exit the electrolyser via their respective convergence channels along with the lye and flow into the gas separator. Here, gravity facilitates the separation of hydrogen (or oxygen) from the lye. The separated hydrogen (or oxygen) is released from the upper section of the separator and directed into the hydrogen (or oxygen) heat exchanger for cooling. Any liquid droplets are removed at the top of the separator through the hydrogen-washing separator. Finally, the hydrogen is regulated by a control valve before being sent downstream.
Technical Specifications
| Parameter | Unit | GFGL-250/1.6(3.2) | GFGL-600/1.6 | GFGL-1200/1.6 |
|---|---|---|---|---|
| Hydrogen handling capacity | Nm³/h | 250 | 600 | 1200 |
| Hydrogen purity at outlet | % | ≥99.9 | ≥99.9 | ≥99.9 |
| Oxygen purity at outlet | % | ≥98.8 | ≥98.8 | ≥98.8 |
| Hydrogen outlet temperature | ℃ | ≤35 | ≤35 | ≤35 |
| Dimensions of gas-liquid separator | mm | 3200×2800×4000 | 5500×3300×4100 | 5000×3700×6000 |
| Weight of gas-liquid separator | kg | 8500 | 12000 | 22000 |