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A CFD approach to assess the effects of different opening combinations in poultry houses/Uma abordagem em DFC para avaliar os efeitos das diferentes combinacoes de abertura em aviarios
The aim of this study was to use computational fluids dynamics (CFD) to evaluate hygiene and comfort conditions in function of temperature level and ammonia (N[H.sub.3]) concentration during the night in commercial poultry houses used in Brazil and countries with tropical and subtropical climates. F...
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Published in: | Revista brasileira de engenharia agrĂcola e ambiental 2017-12, Vol.21 (12), p.852 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | The aim of this study was to use computational fluids dynamics (CFD) to evaluate hygiene and comfort conditions in function of temperature level and ammonia (N[H.sub.3]) concentration during the night in commercial poultry houses used in Brazil and countries with tropical and subtropical climates. Four models with different curtain heights and different air inlet and outlet positions were used, adopting the open building typology without thermal insulation. The validated CFD model did not present statistical differences from the experimental data, making it possible to use this model to predict the behavior in the four proposed cases. This model can be used to improve the internal conditions of the poultry facilities during the night and could be an important tool to reduce energy consumption and generate better conditions for animal production of chicks over 21 days old. Key words: natural ventilation ammonia concentration computational simulation O objetivo deste trabalho foi utilizar a dinamica de fluidos computacional (DFC) para avaliar as condicoes de higiene e conforto, em funcao dos niveis de temperatura e concentracao de amonia (N[H.sub.3]) durante a noite, em galpoes avicolas comerciais no Brasil e em paises com climas tropicais e subtropicais. Para isto, foram utilizados quatro modelos com diferentes posicoes de altura, cortina com entrada e saida de ar adotando a tipologia de instalacao aberta, sem isolamento termico. O modelo em DFC validado nao apresentou diferencas estatisticas com os dados experimentais, o que torna possivel usa-lo para prever o comportamento dos quatro casos propostos. Este modelo pode ser usado para a melhoria da condicao interna das instalacoes de aves durante a noite podendo, tambem, ser uma ferramenta importante para reduzir o consumo de energia e criar melhores condicoes para a producao de aves com idade superior a 21 dias de idade. Palavras-chave: ventilacao natural concentracao de amonia modelagem computacional |
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ISSN: | 1415-4366 |
DOI: | 10.1590/1807-1929/agriambi.v21n12p852-857 |