Korea Institute of Science and Technology

Myunggi An

Heung Yong Ha

Jinyeon Hwang

Asad Mehmood

Woon Jo Kim

A concentration of a fuel supplied to a fuel cell and a heat exchange rate of a heat exchanger are controlled simultaneously in order to maintain a temperature of fuel cell stack and a diluted fuel concentration that is supplied to the fuel cell stack in a target level. Further, by appropriately responding to an exterior temperature changes or unexpected fuel cell performance changes, it is possible to improve a system efficiency and stability of fuel cell operation and to regulate the fuel concentration quickly and accurately compared to a prior sensor-less concentration controller.

Method and apparatus for simultaneous controlling of fuel concentration and temperature of liquid fuel by sensor-less and temperature-control based feed-back control, liquid fuel cell apparatus using the same

Disclosed is an apparatus for controlling a fuel concentration of a liquid fuel cell apparatus by voltage amplitude control-based feed-back control without using a concentration sensor, which saves power consumed by the fuel cell apparatus and lowers a price of the fuel cell apparatus by using the fuel cell in a simple and small design without using a concentration sensor.

Method and apparatus for controlling fuel concentration of liquid fuel cell by sensor-less and voltage amplitude-control based feed-back control, and liquid fuel cell apparatus using the same

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Siheung-si, South Korea

Myunggi An