Wirkkettenanalyse von Brennstoffzellensystemen

Hellmann, Mark; Kemmer, Helerson; Wallaschek, Jörg

doi:10.1007/s35148-013-0218-9

Cited by 1 publication

(2 citation statements)

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“…In case 1a, the pressure and stoichiometry of the gas flows were adapted to the current. As the different currents require different optimal pressure and stoichiometry combinations [11], the AirS and the HyS have to be controlled to reach the new set points fast. In case 1b, the mass flow and pressure were kept constant on the set points for the medium load point.…”

Section: Adaptive Vs Fixed Boundary Conditionsmentioning

confidence: 99%

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Automotive Fuel Cell Systems: Testing Highly Dynamic Scenarios

et al. 2023

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PEM fuel cell systems face highly dynamic load profiles in automotive application. This work showcases the impact of media supply adaption, system architecture and test rig restrictions on the transient voltage response of an automotive fuel cell stack. Current step and load profile experiments were conducted on a system test rig, featuring automotive balance of plant components, and a short stack test bench. A time scale analysis allowed us to identify the predominant effect for the voltage response in each test case. The voltage response measured in the test cases was dominated either by air supply, membrane humidification or coolant temperature dynamics. This systematic comparison of different types of test setups highlights the importance of application-like system level testing as, in contrast to common experiments, different phenomena shape the electrical stack behavior.

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Section: Adaptive Vs Fixed Boundary Conditionsmentioning

confidence: 99%

“…Therefore, a fast adaption of the fuel cell system's operating point becomes necessary. Every operating point requires a certain optimized set of stack conditions to achieve an ideal hydration state and high system efficiency [11]. This makes a fast adaption of the stack conditions critical to achieve a highly dynamic fuel cell operation.…”

Section: Introductionmentioning

confidence: 99%