Numerical evaluation of ventilation performance in children day care centres
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , |
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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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 |
instacron_str |
RCAAP |
institution |
RCAAP |
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 |
repository.mail.fl_str_mv |
|
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1799132113623056384 |