| Station Definition | A hydrogen refueling station is a facility that receives, produces, compresses, stores, meters, and dispenses hydrogen to fuel-cell vehicles. | Used for buses, heavy-duty trucks, logistics vehicles, passenger vehicles, and other road vehicles powered by hydrogen fuel cells. | Connects hydrogen production and distribution infrastructure with transportation users. | China’s national technical framework for hydrogen refueling stations and fuel-cell vehicles. |
| Hydrogen Supply Mode | Hydrogen may be supplied by tube trailers, liquid-hydrogen transport, pipelines, or produced on site by electrolysis or other reforming processes. | Delivered gaseous hydrogen is widely used where centralized hydrogen production is available; on-site production can reduce transport distance. | Determines station layout, storage requirements, operating cost, and supply reliability. | Hydrogen supply is selected according to local industrial resources, transport distance, land availability, and vehicle demand. |
| Common Vehicle Pressure | 35 MPa refueling is commonly associated with buses and many commercial vehicles, while 70 MPa refueling is used for passenger vehicles and selected light-duty applications. | Commercial fleets in China often prioritize 35 MPa systems because of vehicle size, operating routes, and fleet-oriented station design. | Pressure selection affects compressor specifications, storage cascade design, dispenser configuration, and vehicle compatibility. | Fuel-cell vehicle and hydrogen refueling-station standards distinguish pressure classes for different vehicle applications. |
| Hydrogen Quality | Hydrogen supplied to fuel-cell vehicles must meet fuel-cell-grade purity and contaminant limits. ISO 14687:2019 specifies Grade D hydrogen for road-vehicle fuel-cell applications, including a minimum hydrogen purity of 99.97% by volume. | Purity control is required for both delivered hydrogen and hydrogen produced by on-site equipment. | Prevents catalyst poisoning, protects stack performance, and supports vehicle durability. | ISO 14687:2019 and China’s fuel-cell vehicle hydrogen-fuel specification framework. |
| Main Process Equipment | Typical equipment includes unloading or production units, compressors, high-pressure storage vessels, priority panels, dispensers, cooling systems, valves, meters, leak detectors, and control systems. | Equipment combinations vary according to the supply mode, target vehicle pressure, station capacity, and site restrictions. | Controls the complete sequence from hydrogen reception or production to safe vehicle refueling. | Equipment should be selected and integrated in accordance with applicable safety, pressure-vessel, metering, and electrical standards. |
| Compression Function | Compressors raise hydrogen from the supply pressure to the pressure required for high-pressure storage and vehicle dispensing. | Reciprocating, diaphragm, hydraulic, and other compressor technologies may be used depending on throughput, inlet pressure, and maintenance requirements. | Compression is essential for achieving efficient storage and rapid refueling. | Compressor selection depends on hydrogen flow rate, pressure ratio, duty cycle, vibration control, and hydrogen compatibility. |
| High-Pressure Storage | High-pressure storage is normally arranged in multiple banks or cascades so that hydrogen can be transferred efficiently during dispensing. | Storage capacity is designed around peak vehicle demand, delivery intervals, compressor performance, and available site area. | Balances supply and demand and reduces the time required for vehicle refueling. | Storage vessels and piping must comply with applicable pressure-equipment and hydrogen-service safety requirements. |
| Pre-Cooling | High-pressure hydrogen dispensing may require pre-cooling to control gas temperature during rapid filling, particularly for 70 MPa applications. | Pre-cooling systems are more important where passenger vehicles or other rapid-refueling vehicles are served. | Supports safe filling, protects vehicle components, and helps maintain the required filling protocol. | Hydrogen refueling protocols specify temperature, pressure, communication, and filling-control requirements. |
| Refueling Time | Refueling time depends on vehicle tank capacity, starting pressure, station capacity, dispenser configuration, ambient temperature, and filling protocol. | Fleet stations are commonly designed around scheduled operation and vehicle queuing, while passenger-vehicle stations require faster and more standardized dispensing. | Directly affects fleet productivity, station utilization, and the number of vehicles a station can serve per day. | Actual filling time must be verified through the selected vehicle and station design rather than assumed from pressure alone. |
| On-Site Electrolysis | Electrolyzers split water into hydrogen and oxygen by using electricity. The hydrogen is then dried, purified, compressed, and stored or dispensed. | Suitable for locations with access to electricity, water, renewable power, or distributed hydrogen demand. | Can reduce dependence on long-distance hydrogen delivery and connect station operation with renewable-energy utilization. | System performance depends on electrolyzer type, electricity source, water treatment, operating hours, and compression requirements. |
| Station Safety | Safety systems commonly include hydrogen leak detection, ventilation, emergency shut-off, pressure relief, grounding, fire protection, separation distances, and controlled access. | Safety design is required for both standalone stations and integrated stations located near industrial, commercial, or transport facilities. | Reduces the probability and consequence of leakage, overpressure, ignition, and equipment failure. | Station design should follow Chinese fire-safety, hazardous-chemical, pressure-equipment, electrical, and hydrogen-specific requirements. |
| Automation and Monitoring | Modern stations use sensors, programmable control systems, gas-quality monitoring, pressure and temperature monitoring, metering, alarms, and remote operating functions. | Digital monitoring is increasingly used for fleet scheduling, maintenance planning, fault diagnosis, and operational data management. | Improves safety, availability, traceability, and lifecycle maintenance efficiency. | Control architecture should include fail-safe logic, alarm management, data recording, and emergency shutdown functions. |
| Station Layout Types | Common configurations include external-hydrogen stations, on-site production stations, and combined stations that integrate hydrogen production with refueling. | External-hydrogen stations are practical near centralized supply; integrated stations are suitable where local production and demand are closely matched. | Layout selection affects permitting, logistics, capital expenditure, land use, and station operating flexibility. | Site selection must consider hydrogen source, transport routes, vehicle demand, safety distances, utilities, and local approval requirements. |
| Primary User Segment | Fuel-cell buses and heavy-duty vehicles generally create predictable, concentrated hydrogen demand along fixed routes or logistics corridors. | Commercial fleets are important early users because centralized depot operation can improve station utilization. | Stable fleet demand supports station economics and helps establish regional hydrogen transportation networks. | Demand assessment should use vehicle routes, daily mileage, tank capacity, refueling frequency, and operating schedules. |
| Key Selection Criteria | Important criteria include hydrogen source, purity, pressure class, daily throughput, peak-hour demand, compressor reliability, safety compliance, land area, and lifecycle cost. | Buyers typically evaluate complete system integration rather than an individual component alone. | Provides a practical framework for comparing hydrogen-station engineering and equipment suppliers without relying on company or brand names. | Technical evaluation should be based on verified specifications, certification, commissioning records, maintenance capability, and compliance documentation. |