This paper presents a neural network predictive control strategy to optimize power distribution for a fuel cell/ultracapacitor hybrid power system of a robot. We model the nonlinear power system by employing time variant auto-regressive moving average with exogenous (ARMAX), and using recurrent neural network to represent the complicated coefficients of the ARMAX model. Because the dynamic of t...

This paper summarizes experimental results of an air fed polymer electrolyte membrane fuel cell system HyPM XR 12 (Hydrogenics Corp.) considering fuel cell temperature, stoichiometry and load requirement variations at ambient and low pressure operation. The experimental work realized at a low pressure test facility designed and assembled by the German Aerospace Center, Institute of Engineering ...

the electrocatalysis of the oxygen reduction reaction (orr) on carbon supportedpt-v (1:1) catalyst in polymer electrolyte fuel cells (pefc) was investigated. atan oxygen pressure of one atm an enhanced electrocatalytic property of pt-v/ccompared with pt/c is revealed. these results indicate the occurrence of adifferent electrocatalytic mechanism for the orr on pt/c and pt-v/c. anincrease of mas...

long–term stability and oxidation resistance of aisi 439 ferritic stainless steel used as interconnects in solid oxide fuel cells can be improved by use of a protective coating. in this study the pack cementation method was employed to coat aisi 439 ferritic stainless steel with manganese. isothermal oxidation was conducted at 800 ºc for 200 hours in static air to investigate the role of coatin...

effect of methanol concentration and channel depth of bipolar plates on the performance of single direct methanol fuel cell was investigated experimentally. the membrane used in this experiment was nafion117. dimension of the single cell were 10cm 10 cm. methanol concentrations of 0.50, 1.0, 1.5, 2.0, 3.0 molar were used. channel depth of the bipolar plates were chosen to be 1.0, 1.5, 2.0 mm, a...

PUMA Mind is a co-funded project aimed at enhancing the understanding of the behavior of fuel cell systems in vehicles taking advantage of the new freedoms in design that electric powertrains provide. Within this project, IDIADA focused on the integration of fuel cell systems in the automotive sector and the resulting fuel cell power demand profiles were used as base line to develop the fuel ce...

Polymer electrode membrane (PEM) fuel cell has been intensively investigated to improve its output power as a new alternative energy resource. One vital part of PEM fuel cell is its membrane and its critical role in power production of fuel cell. Specifically, the thermal, hydrodynamic and ionic properties of membrane form the core mechanisms of energy generation inside PEM fuel cell. In this s...

Recently, the world is facing energy crisis for non-renewable resources. So people are searching for high efficient energy transformations and way to utilize the alternate energy sources. Fuel cells are an important part in the research. The main aspects of fuel cell research is to reduce the cost and simplifying implementation conditions In recent years, people are moving towards microbiology ...

The chemical analysis of processes inside fuel cells under operating conditions in either direct or inverted (electrolysis) mode and their correlation with potentiostatic measurements is a crucial part of understanding fuel cell electrochemistry. We present a relatively simple yet powerful experimental setup for online monitoring of the fuel cell exhaust (of either cathode or anode side) downst...