Designing a hydrogen gas ejector for 5 kW stationary PEMFC system - CFD-modeling and experimental validation

摘要

Ejectors are durable and inexpensive equipment for realizing hydrogen recirculation in proton exchange membrane fuel cell (PEMFC) systems. In the present work, a hydrogen recirculation ejector targeted for high turndown ratio operation in a 5 kW(e) PEMFC system was designed, manufactured with 3D-printing, and characterized experimentally with both air and humid hydrogen.