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Purem by Eberspaecher has introduced a new De-Hydrator designed to reduce visible steam formation in fuel cell-powered vehicles by improving exhaust air water management.
In mobile fuel cell systems, the reaction between hydrogen and oxygen generates electrical energy and produces water vapor as a byproduct. Under low ambient temperatures or high humidity, this can lead to visible steam emissions at the tailpipe. According to the company, this effect may have greater road safety implications than previously recognized.
The De-Hydrator addresses this through a multi-step separation process. Moisture-laden air is first mixed with cooled air, allowing condensation to occur through heat exchange. The condensed water is then removed by a separator within the modular exhaust air system. Warm air is subsequently reintroduced into the cooled exhaust flow to reduce relative humidity and limit visible steam at the outlet.
Purem by Eberspaecher positions the De-Hydrator as part of its modular exhaust air system for fuel cell applications, which can be adapted to customer requirements. The company says the system has already undergone test bench and road validation, including collaboration with RWTH Aachen and practical testing with a German vehicle manufacturer.
The development builds on Purem by Eberspaecher’s expertise in exhaust technology, flow control, simulation, and in-house testing. A dedicated fuel cell test bench has been established at the company’s Esslingen headquarters to support development and validation.
