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Caracterização do recurso eólico em ambiente urbano : aplicação a uma zona urbana portuguesa
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Advisor(s)
Abstract(s)
RESUMO: Este trabalho apresenta uma metodologia de avaliação preliminar do recurso eólico numa área urbana através do uso de um modelo digital de terreno urbano (DTM urbano) desenvolvido pelos autores tendo a sua metodologia de criação já apresentado resultados promissores, sobretudo quando aplicada em modelos comerciais CFD. Neste trabalho recorreu-se a um modelo comercial de referência do sector de energia eólica para o cálculo do recurso do vento, o modelo WaspEngineering, e ao modelo freeware CDF-OpenFoam, de forma a avaliar o impacto das estimativas obtidas por ambos os modelos com a utilização do modelo digital de terreno urbano. Um perfilador vertical de vento – Lidar - capaz de inferir o vento horizontal a diversas alturas acima do nível do mar foi instalado no telhado de um edifício selecionado para fins de validação do perfil vertical do vento dentro da área urbana. O modelo digital de terreno urbano permite a introdução da descrição do tecido urbano acoplado à orografia da região como se fosse um terreno complexo. Os resultados obtidos mostram que a metodologia do terreno digital urbano é favorável para estudar o comportamento do perfil vertical do vento em ambiente urbano em altíssima resolução espacial, uma vez que estão de acordo com as observações inferidas por Lidar, e por outro lado, adequada ao uso em modelos CFD de várias tipologias – comerciais e freeware.
ABSTRACT: This paper presents a methodology for the preliminary assessment of the wind resource in an urban area using an urban digital terrain (urban DTM) developed by the authors, having this methodology already shown promising results, especially when applied to commercial CFD models. In this work, a commercial reference model of the wind energy sector to calculate the wind resource, the WaspEngineering model, and the freeware CDF-OpenFoam model, were used in order to assess the impact of the estimates obtained by both models with the use of the urban DTM. A vertical wind profiler - Lidar - capable of inferring the horizontal wind at different heights above the sea level was installed on the roof of a selected building to validate the vertical wind profile within the urban area. The DTM enables the introduction of the description of the urban fabric coupled with the region's orography as if it was a complex terrain. The results obtained show that the urban DTM methodology is adequate to study the behavior of the vertical wind profile in an urban environment in very high spatial resolution, since they are in accordance with the inferred observations by Lidar. It is also possible to conclude that the Urban DTM methodology, issuitable for use in CFD models of various types - commercial and freeware.
ABSTRACT: This paper presents a methodology for the preliminary assessment of the wind resource in an urban area using an urban digital terrain (urban DTM) developed by the authors, having this methodology already shown promising results, especially when applied to commercial CFD models. In this work, a commercial reference model of the wind energy sector to calculate the wind resource, the WaspEngineering model, and the freeware CDF-OpenFoam model, were used in order to assess the impact of the estimates obtained by both models with the use of the urban DTM. A vertical wind profiler - Lidar - capable of inferring the horizontal wind at different heights above the sea level was installed on the roof of a selected building to validate the vertical wind profile within the urban area. The DTM enables the introduction of the description of the urban fabric coupled with the region's orography as if it was a complex terrain. The results obtained show that the urban DTM methodology is adequate to study the behavior of the vertical wind profile in an urban environment in very high spatial resolution, since they are in accordance with the inferred observations by Lidar. It is also possible to conclude that the Urban DTM methodology, issuitable for use in CFD models of various types - commercial and freeware.
Description
CIES2020 - XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar
Keywords
Wind energy Urban wind Resource assessment Modelling
Citation
Costa, P... [et.al.] - Caracterização do recurso eólico em ambiente urbano : aplicação a uma zona urbana portuguesa. In: CIES2020: As Energias Renováveis na Transição Energética: Livro de Comunicações do XVII Congresso Ibérico e XIII Congresso Ibero-americano de Energia Solar. Helder Gonçalves, Manuel Romero (Ed.). Lisboa, Portugal: LNEG, 3-5 Novembro, 2020, p. 651-659
Publisher
LNEG - Laboratório Nacional de Energia e Geologia