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Potential for hydrogen production associated to water and food in off-grid communities of Southern Africa [Resumo]

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Resumo:ABSTRACT: Solar energy is called to meet electricity demands for isolated, off-grid communities in Africa. However, solar electric energy is intermittent and can be stored, for a limited amount of time, in batteries, which are expensive and cause serious environmental impacts at the end of their lifetime. Conversion of the surplus electric energy to green hydrogen through water electrolysis and back to electricity, when needed, using electrolyser-fuel cells systems, is examined as a potential solution to meet the water-energy-food nexus in Southern Africa. In the framework of the Agrivoltaics concept, the main constrains, opportunities and parameters to consider its applicability are presented and discussed, in terms of its technical, economic, environmental and social impacts. In the second phase of this work the developing of a PEM electrolyser for connection to a solar PV power source and a fuel cell device, for a stand-alone application, is proposed, ensuring high reliability and energy conversion efficiencies, as well as adequate transient response and a competitive cost. It is intended as a low-carbon energy system, realising the potential for synergy in the Agrivoltaic concept, aligned with global and regional sustainability goals.
Autores principais:Rodrigues, Luiz
Outros Autores:Araujo, Luis; Gano, António; Pinto, P.J.R.; Simoes, Sofia; Brito, Paulo; Monjane, Armindo; Rangel, C. M.
Assunto:Solar hydrogen PEM Electrolysis Fuel cells
Ano:2023
País:Portugal
Tipo de documento:documento de conferência
Tipo de acesso:acesso aberto
Instituição associada:Laboratório Nacional de Energia e Geologia, I.P.
Idioma:inglês
Origem:Repositório do LNEG

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