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H₂ Conditioning & Dosing for Jet Engines

BRIGHT develops and implements modular H₂ conditioning and control systems that deliver hydrogen to the test specimen or process point with precisely controlled mass flow, pressure, and temperature.

The solution is designed for integration into existing test bench and plant infrastructures and ensures a safe, reproducible supply, including automation and interface connectivity.

The challenge is that, in test bench applications, hydrogen mass flow and temperature must be provided with tight tolerances and very short settling times of less than 10 seconds to ensure safe and reproducible operating conditions.

In addition, an ATEX/Ex-compliant safety concept as well as space-critical integrations, e.g., modular/compact designs, must be taken into account.

Our solution uses preconditioning via a circulation line for temperature control and a control architecture with two parallel control valves for pre-setting and rapid fine-tuning to quickly and stably manage setpoint changes.

Temperature control is multi-stage, including preheating and post-regulation close to the test specimen, and integration into SCADA/control systems is implemented via Profinet with defined data transfer.

Key features

Mass flow control range: 1 to >100 kg/h, 0.27 to 27.7 g/s

Mass flow tolerance: ±1% of the setpoint at >3 kg/h, 0.01% FS

Temperature control range: −55 °C to +100 °C, tolerance ±5 K

Settling time: <10 seconds

Pressure data: hydrogen pressure up to 10 bar(g); design pressure 25 bar(g); components upstream of the safety shut-off valve up to 45 bar(g)

Test chamber pressure control: air back pressure 0.25 to 5 bar(g)

Control variable opening angle: 0 to 100%, ±0.1%

Temperature concept: preheating adjustable from 20 °C to 50 °C, mixed control and post-heating near the test specimen; switching process via bypass

Mass flow/pressure control concept: inlet pressure control to 25 bar, two parallel flow control valves; Coriolis measurement, Promass F300

Automation/SCADA: Profinet MRP ring, non-optimized data block 10 Hz; automatic and manual operation

Explosion protection/electrical: explosion-proof cabling with suitable Harting connectors; H₂-approved components in explosion-proof version; grounding terminals provided

Compact/test-object-proximate design: compact construction, e.g., intermediate floor, and test-object-proximate temperature control; thermally inert system with reserve for mass flow changes

Application areas

Conditioning and dosing of hydrogen for engine, turbine, and similar test benches

Tests with defined gas conditions, mass flow, pressure, and temperature, and high reproducibility

Test bench integration with SCADA/control system connectivity and safety-oriented design, ATEX/explosion protection

H₂ Conditioning & Dosing for Jet Engines