Proposta de melhoria do sistema de painéis fotovoltaicos instalados no projecto habitacional aldeia solar executado na comuna de Cabiri, província de Icole e Bengo, Angola
Tesis
Materias > Ciencias Sociales
Materias > Educación
Universidad Europea del Atlántico > Docencia > Trabajos finales de Máster
Cerrado
Portugués
Angola apesar de ser um país sub-desenvolvido apresenta um enorme potencial a nível de recursos naturais, no entanto, no que concerne o fornecimento de energia eléctrica o país depende fortemente dos combustíveis fósseis por ser uma das maiores províncias petrolíferas da África Austral. Desde a adesão ao Protocolo de Quioto em 2007 um dos objectivos do país tem sido contribuir para a implementação de metas que visam a redução de emissões de gases de efeito estufa por meio de adesão de medidas e programas que visam a estabilização dos mesmos. O governo angolano comprometeu-se à criação de fundações para dar vida à implementação dos projectos de desenvolvimento sustentável fazendo recurso às energias renováveis de modos a beneficiar as populações de zonas rurais que até hoje encontram-se gravemente impactadas com a falta de bens essenciais e serviços públicos devido à falta de infraestruturas fruto do longo período de guerra civil. O conceito de Aldeia solar e a utilização de painéis fotovoltaicos fazendo uso de um recurso climático abundante no país vem dar resposta à necessidade que existe em várias zonas urbanas e rurais. A presente dissertação consiste no estudo de um dos grandes investimentos do governo angolano a nível de energias renováveis levando à investigação das causas do curto tempo de vida útil dos painéis solares fotovoltaicos instalados na zona de Cabiri, por meio de simulação fazendo recurso ao software PVSyst de um dimensionamento diferente do existente. O sistema fotovoltaico com módulo monocristalino de 440Wp Twin 144 half cells foi escolhido de acordo com os principais resultados obtidos visto que apresenta menos perdas, um índice de performance elevado e uma geração de energia superior aos restantes, adicionalmente o monitoramento periódico e os programas de educação à população consistem num dos passos acertados no prolongamento da vida útil destes painéis fotovoltaicos.
metadata
Mendes, Neila Lorena Eduardo da Costa
mail
neila.lorena@hotmail.com
(2022)
Proposta de melhoria do sistema de painéis fotovoltaicos instalados no projecto habitacional aldeia solar executado na comuna de Cabiri, província de Icole e Bengo, Angola.
Masters thesis, SIN ESPECIFICAR.
Resumen
Angola apesar de ser um país sub-desenvolvido apresenta um enorme potencial a nível de recursos naturais, no entanto, no que concerne o fornecimento de energia eléctrica o país depende fortemente dos combustíveis fósseis por ser uma das maiores províncias petrolíferas da África Austral. Desde a adesão ao Protocolo de Quioto em 2007 um dos objectivos do país tem sido contribuir para a implementação de metas que visam a redução de emissões de gases de efeito estufa por meio de adesão de medidas e programas que visam a estabilização dos mesmos. O governo angolano comprometeu-se à criação de fundações para dar vida à implementação dos projectos de desenvolvimento sustentável fazendo recurso às energias renováveis de modos a beneficiar as populações de zonas rurais que até hoje encontram-se gravemente impactadas com a falta de bens essenciais e serviços públicos devido à falta de infraestruturas fruto do longo período de guerra civil. O conceito de Aldeia solar e a utilização de painéis fotovoltaicos fazendo uso de um recurso climático abundante no país vem dar resposta à necessidade que existe em várias zonas urbanas e rurais. A presente dissertação consiste no estudo de um dos grandes investimentos do governo angolano a nível de energias renováveis levando à investigação das causas do curto tempo de vida útil dos painéis solares fotovoltaicos instalados na zona de Cabiri, por meio de simulação fazendo recurso ao software PVSyst de um dimensionamento diferente do existente. O sistema fotovoltaico com módulo monocristalino de 440Wp Twin 144 half cells foi escolhido de acordo com os principais resultados obtidos visto que apresenta menos perdas, um índice de performance elevado e uma geração de energia superior aos restantes, adicionalmente o monitoramento periódico e os programas de educação à população consistem num dos passos acertados no prolongamento da vida útil destes painéis fotovoltaicos.
| Tipo de Documento: | Tesis (Masters) |
|---|---|
| Palabras Clave: | Cabiri, energias renováveis, painéis fotovoltaicos, aldeia solar, população |
| Clasificación temática: | Materias > Ciencias Sociales Materias > Educación |
| Divisiones: | Universidad Europea del Atlántico > Docencia > Trabajos finales de Máster |
| Depositado: | 24 Oct 2023 23:30 |
| Ultima Modificación: | 24 Oct 2023 23:30 |
| URI: | https://repositorio.uneatlantico.es/id/eprint/1151 |
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Enzymatic treatment shapes in vitro digestion pattern of phenolic compounds in mulberry juice
The health benefits of mulberry fruit are closely associated with its phenolic compounds. However, the effects of enzymatic treatments on the digestion patterns of these compounds in mulberry juice remain largely unknown. This study investigated the impact of pectinase (PE), pectin lyase (PL), and cellulase (CE) on the release of phenolic compounds in whole mulberry juice. The digestion patterns were further evaluated using an in vitro simulated digestion model. The results revealed that PE significantly increased chlorogenic acid content by 77.8 %, PL enhanced cyanidin-3-O-glucoside by 20.5 %, and CE boosted quercetin by 44.5 %. Following in vitro digestion, the phenolic compound levels decreased differently depending on the treatment, while cyanidin-3-O-rutinoside content increased across all groups. In conclusion, the selected enzymes effectively promoted the release of phenolic compounds in mulberry juice. However, during gastrointestinal digestion, the degradation of phenolic compounds surpassed their enhanced release, with effects varying based on the compound's structure.
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Luo
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A novel machine learning-based proposal for early prediction of endometriosis disease
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Background The aging process leads to negative changes in various bodily systems, including the neuromuscular system. Strength training, is considered the best strategy to counteract these neuromuscular changes, preventing sarcopenia and frailty in older adults. Objective To compare the effects of strength training with elastic resistance and free weights on the muscle strength of knee extensors and flexors and functional performance in the older adults. Methods This was a randomised clinical study. Thirty-one participants of both sexes were allocated randomly into two groups: Training Group Free Weight (TGFW, n = 15) and Training Group with Elastic Resistance (TGER, n = 16). Two individuals were excluded and so, twenty-nine individuals were evaluated before and after eight weeks training protocol, which was performed three times a week. The determination of the training load was obtained using a protocol of 10 repetitions maximum. Results No significant differences were found in either the intra- or the inter-group comparisons, on functional performance and peak muscle strength. In the intra-groups (pre- and post-strength training), it was observed that both groups significantly increased the training load (10 RM) for the extensors (TGFW p = 0.0002; TGER p = 0.0001) and the knee flexors (TGFW p = 0.006; TGER p = 0.0001). Conclusion Both training protocols similarly were effective in increasing the training load observed by the 10 RM test of the extension and flexion movements of the knee.
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Ferreira
<a class="ep_document_link" href="/17061/1/fspor-1-1565900.pdf"><img class="ep_doc_icon" alt="[img]" src="/style/images/fileicons/text.png" border="0"/></a>
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<a href="/17139/1/s41598-025-89266-9.pdf" class="ep_document_link"><img class="ep_doc_icon" alt="[img]" src="/style/images/fileicons/text.png" border="0"/></a>
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In the rapidly evolving landscape of artificial intelligence (AI) and the Internet of Things (IoT), the significance of device diagnostics and prognostics is paramount for guaranteeing the dependable operation and upkeep of intricate systems. The capacity to precisely diagnose and preemptively predict potential failures holds the potential to considerably amplify maintenance efficiency, diminish downtime, and optimize resource allocation. The wealth of information offered by telemetry data gathered from IoT devices presents an opportunity for diagnostics and prognostics applications. However, extracting valuable insights and making well-timed decisions from this extensive data reservoir remains a formidable challenge. This study proposes a novel AI-driven framework that integrates forward chaining and backward chaining algorithms to analyze telemetry data from IoT devices. The proposed methodology utilizes rule-based inference to detect real-time anomalies and predict potential future failures, providing a dual-layered approach for diagnostics and prognostics. The results show that the diagnostics engine using forward chaining detects real-time issues like “High Temperature” and “Low Pressure,” while the prognostics engine with backward chaining predicts potential future occurrences of these issues, enabling proactive prevention measures. The experimental results demonstrate that adopting this approach could offer valuable assistance to authorities and stakeholders. Accurate early diagnosis and prediction of potential failures have the capability to greatly improve maintenance efficiency, minimize downtime, and optimize cost.
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