At the IAA Transportation 2024 event, ZF Commercial Vehicle Solutions (CVS) division introduced its latest innovation in e-mobility: the Hydrogen Recirculation Blower.
Designed to optimize hydrogen levels in fuel cell-powered vehicles, this new technology recirculates unused hydrogen, thereby enhancing both hydrogen consumption and overall vehicle performance.
The Hydrogen Recirculation Blower operates in conjunction with ZF’s Fuel Cell Air Compressor, which was announced in April 2023. While the air compressor supplies essential air to the fuel cell stack to facilitate the chemical reaction between hydrogen and oxygen, the blower recirculates the unused hydrogen, contributing to a more efficient and balanced system.
Together, these products expand the company’s Balance of Plant (BoP) portfolio, aimed at supporting the efficient operation of fuel cell systems in commercial vehicles. Both the blower and compressor are designed for long-term durability, reducing the vehicle's Total Cost of Ownership (TCO).
Dr Christian Brenneke, Head of Innovation & Development at ZF's Commercial Vehicle Solutions Division, said, 'ZF has applied its extensive expertise in system integration and air bearing systems to develop these innovative products. The newly unveiled Hydrogen Recirculation Blower, combined with our fuel cell air compressor, is part of our expanding full-flex e-mobility portfolio. These innovations demonstrate how our products for fuel cell systems are driving decarbonization in a technologically open manner alongside our growing range of decarbonized technologies.”
The Hydrogen Recirculation Blower, built on a turbomachinery concept, is both compact and lightweight, with an ultra-high-speed electric motor capable of reaching up to 100,000 RPM. Using air bearing technology, the blower eliminates the need for lubrication, thereby preventing contamination of the fuel cell stack. Its integrated inverter supports 800V high-voltage systems, ensuring optimal efficiency and high media mass flow.
Efficient hydrogen recirculation is crucial for maintaining the longevity and performance of fuel cell stacks. ZF's solution effectively manages water and inert gases in the anode path, incorporating a patented electric media-gap motor technology. With an integrated water separator, the system negates the need for active cooling, simplifying system assembly and offering packaging advantages.
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