Combine Fuzzy Sliding Surface Control and Ultrasonic Atomization System to Optimize PEMFC Output
Date Issued
2011
Date
2011
Author(s)
Peng, Sz-Shung
Abstract
This paper takes advantage of using ultrasonic atomizer devices is small, atomized droplets densification and humidifier uniformly, easy to supply water, and develops an ultrasonic atomization system, reaction gas heater, power ultrasonic atomizer and ultrasonic atomization bottle. Besides, combine fuzzy sliding surface control theory with power ultrasonic atomizer.
It’s different from the general humidifier which can’t control humidity proactively. The ultrasonic atomization system developed by this paper can automatically adjust atomizer driving voltage to change amount of atomization, with increase and decrease of amount of atomization , the relative humidity of gas can also changes immediately, so that we can control relative humidity.
After we can control relative humidity , this paper takes relative humidity and PEMFC current density output into fuzzy input according to fuzzy sliding surface control theory to calculate an ideal fuzzy output and applied to the current output of proton exchange membrane fuel cell then. It was observed that we can improve the oscillation and decrease too much of PEMFC output with ultrasonic atomization system control mechanism compared to without control mechanism.
Subjects
PEMFC
ultrasonic atomizer
Fuzzy sliding surface control
relative humidity
Type
thesis
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