Reactant Parameters Control TRIZ Cases

Pulsed valve actuation keeps fuel-cell valves from freezing in place at low temperatures while preserving the desired setting.

Separate reaction, storage, and recovery units keep hydrogen output controllable while avoiding bulky reactors and solidified byproducts.

Pressure-regulated fuel transfer between fuel cell vehicles enables refueling outside stations while controlling flow and warning of fuel depletion.

Mixed iron-vanadium electrolytes improve reactant utilization and stability above 40°C while raising flow battery energy density.

A dual-rigidity manifold uses a flexible plate body to absorb thermal shrinkage stress, reducing seal cracking and gas leaks in cell stacks.

Using alkaline zinc and permanganate electrolytes, this flow battery avoids toxic acidic chemistry while improving cyclability and energy efficiency.

Reversing cathode oxygen flow redistributes retained water in pure-oxygen fuel cells, helping maintain humidity and power generation efficiency.

Laterally spaced LAH fuel beds generate hydrogen from water vapor while coolant flow between beds controls reaction heat and cuts tank weight.

By linking the manifold and adjacent passage at their upper ends, condensate drains away from the stack to reduce freezing and pipe blockage.

Embedding energy storage in the membrane around a hydrogen pressure vessel cuts battery volume and vehicle weight while preserving fuel storage.

A single recirculation line serves one fuel cell stack while others receive pure fuel, cutting multi-stack complexity and improving efficiency.

Advance replacement alerts and dual-power operation cut hydrogen waste when storage-alloy cartridges make remaining fuel hard to gauge.

By estimating post-shutoff gas discharge and choking, the controller corrects pressure sensor offset without unnecessary hydrogen loss.

A solid electroactive catholyte reservoir boosts alkaline ferrocyanide flow battery energy density without sacrificing ionic conductivity.

Anode off-gas flow history sets drain valve open time, removing water sensors while keeping fuel cell water drainage accurate.

Pre-stored compressed air and valve switching help a fuel cell compressor maintain sea-level-equivalent pressure at high altitude.

A drain controller estimates hydrogen concentration and closes the water trap valve when fuel discharge is detected, improving purge efficiency.

By limiting fuel gas before shutdown, this case filters false leak signals and avoids fuel cell stoppages that speed deterioration.

Controllable flow between top, bottom, and intermediate electrolyte tanks maintains power output while cutting circulation energy and improving electrolyte use.

A heat exchanger and thermal engine recover energy from warming liquid hydrogen, generating onboard power while reducing waste in aircraft.

An integrated end plate and cover cuts parts and sealing points while maintaining compression and media distribution in compact multi-series fuel cell stacks.

After air cutoff, line pressure variation is checked to validate sensor correction and avoid hydrogen over- or under-supply during valve faults.

Recirculating discharge gas to selected PEM fuel cell groups lowers oxidizer fraction for uniform low-voltage regeneration with less hydrogen use.

Coordinated cut-off and suction valves store cathode air, then release it through the exhaust line to keep fuel cell hydrogen below safety limits.

A controller adjusts hydrogen blending in natural gas pipelines to match facility demand and feed H2-compatible fuel cells with lower emissions.

A movable-wall vessel uses hydraulic pressure and check valves to expel fuel cell byproducts into high-pressure subsea or downhole environments.

U-shaped internal flow paths and switched path lengths cut inter-stack shunt currents while balancing pressure drop in flow batteries.

A dual-ejector setup varies mixed gas flow during startup to purge air and nitrogen from fuel electrodes quickly without a hydrogen pump.

A row-based modular fuel cell layout reduces pad size and site footprint while speeding installation and preserving fault tolerance.

Predictive control adjusts fuel cell start-stop operation from real-time and cumulative vehicle data to cut component stress and degradation.

Sensors trigger a deployable air-intake deflector and compressor adjustment to block rain, hail, and debris without sustained pressure loss.

Active air utilization control shifts power between the fuel cell and energy storage while maintaining water balance and avoiding DC/DC converter losses.

Estimated valve and compressor flow resistance helps decouple gas flow and pressure ratio control, improving fuel cell air supply durability.

Parallel injectors with staggered shutoff keep hydrogen recirculation stable at low current while reducing pressure pulses and blower power.

Embedded conductive carbon fibers heat liquid hydrogen inside the pipe, enabling cold-start fuel cell use without larger external heat exchangers.

Pressure-set valves prioritize multiple fuel gases by mixed-gas pressure, stabilizing fuel cell supply without complex sensing or control.

A partitioned exhaust merging unit separates cathode and anode outlets to prevent water backflow and maintain fuel cell reliability.

A heated auger reactor converts solid hydride fuel into hydrogen on demand, cutting the weight and volume of high-pressure storage.

Base and feedback duty control stabilizes hydrogen supply pressure in fuel cells, reducing overshoot during high output and purge events.

Using an oxygen regulator and stop valve, this case maintains cathode pressure and detects oxygen leakage without injector hitting noise.

A controller keeps fuel cell output slightly above changing load demand to avoid fuel waste, overheating, and supply interruption.

A switchable communication port lets a dual-tube ejector nozzle vary flow path size, sustaining both low-flow velocity and high-flow capacity.

LOHC transport plus depot dehydrogenation and CGH2 delivery cuts compression burden while improving hydrogen routing and inventory control.

Embedded metallic fibres track resistance changes to detect hydrogen leakage, tank condition, and likely leak location without tank removal.

A ceiling-mounted hydrogen sensor and vented compartment layout enable early leak detection and discharge below the front cabin.

A sloped pump and drive-device layout lets the power wire absorb length errors and avoids pipe-frame interference during fuel cell assembly.

Master-slave control modules manage valves and hydrogen tanks by temperature and pressure, enabling scalable fuel cell diagnostics and replacement.

Opening the pressure-maintaining valve before compressor ramp-up boosts cathode air flow during load steps while limiting membrane drying.