Abstract
Abstract In this study, some measurements like the current, voltage and hydrogen flow based on the fuel cell are investigated in spectral-domain as well as their time-domain representations and then, their spectral properties are extracted. Besides this, taking the simplified transfer function approach into account, which is defined between the hydrogen flow and current of the cell as an input-output pair, more detailed results are obtained. Therefore, the spectral parts of the fuel cell are put into categories under the impacts coming from the process, measurement circuits and digitizers. The process noise to be defined at very small frequencies (<15 Hz) can be explained as the effects of the various physical and chemical interactions emerging in the fuel cell. Moreover, this study analysed the spectral characteristics of fuel cells for current, voltage and hydrogen flow in detail.
Highlights
In this study, some measurements like the current, voltage and hydrogen flow based on the fuel cell are investigated in spectral-domain as well as their timedomain representations and their spectral properties are extracted
The process noise to be defined at very small frequencies (
Fuel cells are predicated on electrochemical energy conversion which is a direct conversion from the chemical energy of the fuel to DC electricity [3]
Summary
Fuel cells are predicated on electrochemical energy conversion which is a direct conversion from the chemical energy of the fuel to DC electricity [3]. – High efficiency – Very low or zero emissions – Simplicity and low cost – No moving parts and relatively long life – Modular structure, Size and weight – Quiet In this manner, fuel cells are compact, economical and very reliable sources to provide clean energy [14]. The protons pass through the membrane while the electrons are transferred to the cathode by an external circuit system. Following this process, the protons and electrons are combined with supplied oxygen to form water as waste [6, 15, 16, 24]. To design more stable and efficient systems, it is desired to identify water content changes during the operation of the fuel cell [15, 18]
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