Numerical evaluation of ventilation performance in children day care centres

Detalhes bibliográficos
Autor(a) principal: Viegas, João Carlos
Data de Publicação: 2014
Outros Autores: Nogueira, Susana, Aelenei, Daniel, Cruz, Hildebrando, Cano, Manuela, Neuparth, Nuno
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.18/2760
Resumo: Modelling of ventilation is strongly dependent on the physical characteristics of the building of which precise evaluation is a complex and time consuming task. In the frame of a research project, two children day care centres (CDCC) have been selected in order to measure the envelope air permeability, the flow rate of mechanical ventilation systems and indoor and outdoor temperature. The data obtained was used as input to the computer code CONTAM for ventilation simulations. The results obtained were compared with direct measurements of ventilation flow from short term measurements with CO2 tracer gas and medium term measurements with perfluorocarbon tracer (PFT) gas decay method. After validation, in order to analyse the main parameters that affect ventilation, the model was used to predict the ventilation rates for a wide range of conditions. The purpose of this assessment was to find the best practices to improve natural ventilation. A simple analytical method to predict the ventilation flow rate of rooms is also presented. The method is based on the estimation of wind effect on the room through the evaluation of an average factor ( ) ¥ 2 ΔP / ρ * and on the assessment of relevant cross section of gaps and openings combined in series or in parallel. It is shown that it may be applied with acceptable accuracy for this type of buildings when ventilation is due essentially to wind action.
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spelling Numerical evaluation of ventilation performance in children day care centresChildren Day Care CentresAir PermeabilityTracer GasPFTCONTAMAr e Saúde OcupacionalModelling of ventilation is strongly dependent on the physical characteristics of the building of which precise evaluation is a complex and time consuming task. In the frame of a research project, two children day care centres (CDCC) have been selected in order to measure the envelope air permeability, the flow rate of mechanical ventilation systems and indoor and outdoor temperature. The data obtained was used as input to the computer code CONTAM for ventilation simulations. The results obtained were compared with direct measurements of ventilation flow from short term measurements with CO2 tracer gas and medium term measurements with perfluorocarbon tracer (PFT) gas decay method. After validation, in order to analyse the main parameters that affect ventilation, the model was used to predict the ventilation rates for a wide range of conditions. The purpose of this assessment was to find the best practices to improve natural ventilation. A simple analytical method to predict the ventilation flow rate of rooms is also presented. The method is based on the estimation of wind effect on the room through the evaluation of an average factor ( ) ¥ 2 ΔP / ρ * and on the assessment of relevant cross section of gaps and openings combined in series or in parallel. It is shown that it may be applied with acceptable accuracy for this type of buildings when ventilation is due essentially to wind action.This research was undertaken as part of a research project supported by the Fundação para a Ciência e Tecnologia under Grant PTDC/SAU-ESA/100275/2008 (ENVIRH).Tsinghua University Press and Springer-Verlag Berlin HeidelbergRepositório Científico do Instituto Nacional de SaúdeViegas, João CarlosNogueira, SusanaAelenei, DanielCruz, HildebrandoCano, ManuelaNeuparth, Nuno2015-02-03T15:58:03Z20142014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.18/2760engBuild Simul. 2014 Nov. Doi: 10.1007/s12273-014-0202-71996-359910.1007/s12273-014-0202-7info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-20T15:39:27Zoai:repositorio.insa.pt:10400.18/2760Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:37:47.033737Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Numerical evaluation of ventilation performance in children day care centres
title Numerical evaluation of ventilation performance in children day care centres
spellingShingle Numerical evaluation of ventilation performance in children day care centres
Viegas, João Carlos
Children Day Care Centres
Air Permeability
Tracer Gas
PFT
CONTAM
Ar e Saúde Ocupacional
title_short Numerical evaluation of ventilation performance in children day care centres
title_full Numerical evaluation of ventilation performance in children day care centres
title_fullStr Numerical evaluation of ventilation performance in children day care centres
title_full_unstemmed Numerical evaluation of ventilation performance in children day care centres
title_sort Numerical evaluation of ventilation performance in children day care centres
author Viegas, João Carlos
author_facet Viegas, João Carlos
Nogueira, Susana
Aelenei, Daniel
Cruz, Hildebrando
Cano, Manuela
Neuparth, Nuno
author_role author
author2 Nogueira, Susana
Aelenei, Daniel
Cruz, Hildebrando
Cano, Manuela
Neuparth, Nuno
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Repositório Científico do Instituto Nacional de Saúde
dc.contributor.author.fl_str_mv Viegas, João Carlos
Nogueira, Susana
Aelenei, Daniel
Cruz, Hildebrando
Cano, Manuela
Neuparth, Nuno
dc.subject.por.fl_str_mv Children Day Care Centres
Air Permeability
Tracer Gas
PFT
CONTAM
Ar e Saúde Ocupacional
topic Children Day Care Centres
Air Permeability
Tracer Gas
PFT
CONTAM
Ar e Saúde Ocupacional
description Modelling of ventilation is strongly dependent on the physical characteristics of the building of which precise evaluation is a complex and time consuming task. In the frame of a research project, two children day care centres (CDCC) have been selected in order to measure the envelope air permeability, the flow rate of mechanical ventilation systems and indoor and outdoor temperature. The data obtained was used as input to the computer code CONTAM for ventilation simulations. The results obtained were compared with direct measurements of ventilation flow from short term measurements with CO2 tracer gas and medium term measurements with perfluorocarbon tracer (PFT) gas decay method. After validation, in order to analyse the main parameters that affect ventilation, the model was used to predict the ventilation rates for a wide range of conditions. The purpose of this assessment was to find the best practices to improve natural ventilation. A simple analytical method to predict the ventilation flow rate of rooms is also presented. The method is based on the estimation of wind effect on the room through the evaluation of an average factor ( ) ¥ 2 ΔP / ρ * and on the assessment of relevant cross section of gaps and openings combined in series or in parallel. It is shown that it may be applied with acceptable accuracy for this type of buildings when ventilation is due essentially to wind action.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-01-01T00:00:00Z
2015-02-03T15:58:03Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.18/2760
url http://hdl.handle.net/10400.18/2760
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Build Simul. 2014 Nov. Doi: 10.1007/s12273-014-0202-7
1996-3599
10.1007/s12273-014-0202-7
dc.rights.driver.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Tsinghua University Press and Springer-Verlag Berlin Heidelberg
publisher.none.fl_str_mv Tsinghua University Press and Springer-Verlag Berlin Heidelberg
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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