W. Agila's research while affiliated with Escuela Superior Politécnica del Litoral (ESPOL) and other places
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Publications (9)
In this paper, a fuzzy model is presented to determine in real-time the degree of dehydration or flooding of a proton exchange membrane of a fuel cell, to optimize its electrical response, and, consequently, its autonomous operation. By applying load, current, and flux variations in the dry, normal, and flooded states of the membrane, it was determ...
This work describes an approximate reasoning technique to deal with the non-linearity that occurs in the stabilization of the pressure of anodic and cathodic gases of a proton exchange membrane fuel cell (PEM). The implementation of a supervisory element in the stabilization of the pressure of the PEM cell is described. The fuzzy supervisor is a re...
Citations
... Although physical and mathematical modeling have made significant progress in simulating various processes, their accuracy is still constrained by the constants and parameters that are often presupposed [28,29]. Artificial intelligence has demonstrated high effectiveness in the accurate modeling and optimization of various processes, such as biodiesel production from palm kernel shell [30], electricity generation in fuel cells [31][32][33], microbial fuel cells [34][35][36], alternative fuels [37], heat transfer and waste heat recovery [38][39][40], biohydrogen production [41,42], etc. As a general rule, system identification and parameter identification applications, optimization is a critical technique [34,43]. ...
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... Gas-liquid mass transfer in the porous layers or in the current collectors has been modelled in the case of a PEMFC [10]. Liquid water, vapour, and non-condensable gases in the pores were modelled to assess the best operating conditions and criticisms. ...
... This document is an extension of the work originally presented at Icrera 2019 [1]. The great problems of today's society such as economic inequality, climate change, decreasing of the ozone layer, lack of resources, toxic pollution, diminishing biodiversity, human health, coastal settlements; must be confronted by the academy and decidedly by the engineering sciences. ...
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... RFB is electrochemical energy conversion devices that exhibit redox processes of types in mixed solution of liquid form, deposited in the external containers, and when needed, the solution is introduced in the process [47]. Moreover, its working mechanism is similar to that of polymer electrolyte membrane fuel cell (PEMFC) [48]. It has some remarkable characteristics such as stability, size is free from power and energy application, flexibility, reduced impact on environment, high depth of dis-charge, etc., making it ideal for supporting the electricity production from nonconventional power sources. ...
... The great problems of today's society such as economic inequality, climate change, decreasing of the ozone layer, lack of resources, toxic pollution, diminishing biodiversity, human health, coastal settlements; must be confronted by the academy and decidedly by the engineering sciences. The hydrogen-powered fuel cell stack is the most promising energy source of the future [2], as it would help eliminate the world's serious problems [3,4]. The hydrogen economy-where hydrogen and fuel cells are essential partners-is estimated to grow from USD 122 billion in 2018 to USD 155 billion in 2022 [5,6]. ...
... Base on the PEMFC model in a strategic context [1][2][3], for a better analysis, the causes that produce the transients can be grouped into three large groups strongly related; electrochemical reactions, heat transfer and water flow (twophase flow). Being impedance spectroscopy a useful tool to understand the dynamic response in these processes [4]. ...
