Chang-Ryul Jung

Fuel Supply to Micro DMFC using Reciprocating Pump with Ultrasonic Linear Actuator

A reciprocating pump operated by a piezoelectric linear actuator is introduced as a fuel supplying module for a DMFC. A series of experiments are conducted to characterize the performance of the present pump and effects of low reciprocating frequency pumping of fuel on output power of DMFC. The performance of the pump is studied with respect to reciprocating frequency and operating duty. The results show that the key advantage of the current pump is an ability of low frequency operation which enables high flow rectification performance and that power consumption of the pump is almost linearly proportional to the flow rate. It is also shown that the output voltage of the DMFC is stable with time even though the pumping pressure oscillates periodically