Fuel Cells for Lawnmowers

Feb. 8, 2007
Since the discovery of the fuel cell in 1838 by German Scientist Christian Friedrich Schönbein, the principle of it has come a long way.

Julie Kalista
Online Editor

How a fuel cell works.
Fuel cells produce electricity from external supplies of fuel and oxidant, reacting in the presence of electrolytes, and can operate virtually continuously when flows are maintained. Scientists from Princeton University have made a breakthrough that could make fuel cells practical for small machines like lawnmowers.

Standard fuel cells use electronics to control power, requiring complex systems to manage humidity, fuel recovery, and recycling in order to maintain acceptable efficiencies. Because fuel cells do not operate with a thermal cycle, they can have high efficiencies, especially when operated at low power densities. As a general rule, the more current drawn, the lower the efficiency. For example, a cell running at 0.6 V has an efficiency of about 50%, while the remaining 50% is converted into heat.

The new process feeds in hydrogen to match the required power output and functions as a closed system that uses waste water to regulate the size of the reaction chamber. The design uses 100% of the fuel and eliminates the need for a recycling system.

The next step is to connect several fuel cells together to increase power, and compete with internal-combustion engines in cars and trucks.

More Information:
Princeton University


This web-only article appears in the Tech Insider e-newsletter. If you enjoyed this article and would like to read more like it, sign up today for our free e-mail newsletters!

Sponsored Recommendations

Sept. 16, 2025
From robotic arms to high-speed conveyors, accuracy matters. Discover how encoders transform motor control by turning motion into real-time datadelivering tighter speed control...
Sept. 16, 2025
Keep high-torque gearboxes running efficiently with external lubrication and cooling systems delivered fast. Flexible configurations, sensor-ready monitoring, and stocked options...
Sept. 16, 2025
Now assembled in the U.S., compact P2.e planetary gear units combine maximum torque, thermal efficiency, and flexible configurations for heavy-duty applicationsavailable faster...
Aug. 22, 2025
Discover how to meet growing customer demands for custom products without overextending your engineering team. Learn how scaling your automation strategy can help you win more...

Voice your opinion!

To join the conversation, and become an exclusive member of Machine Design, create an account today!