Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems
Autor(a) principal: | |
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Data de Publicação: | 2021 |
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/10400.1/15619 |
Resumo: | This work evaluates the integral effect of thermal comfort (TC), indoor air quality (IAQ) and Draught Risk (DR) for desks with four personalized ventilation (PV) systems. The numerical study, for winter and summer thermal conditions, considers a virtual chamber, a desk, four different PV systems, four seats and four virtual manikins. Two different PV configurations, two upper and two lower air terminal devices (ATD) with different distance between them are considered. In this study a coupling of numerical methodology, using one differential and two integral models, is used. The heating, ventilating and air conditioning (HVAC) system performance in this work is evaluated using DR and room air removal effectiveness (ε<sub>DR)</sub> that is incorporated in an Air Distribution Index (ADI). This new index, named the Air Distribution Turbulence Index (ADTI), is used to consider simultaneously the TC, the IAQ, the DR and the effectiveness for heat removal (ε<sub>TC</sub>), contaminant removal (ε<sub>AQ</sub>) and room air removal (ε<sub>DR</sub>). The results show that the ADI and ADTI, are generally higher for Case II than for Case I, increase when the inlet air velocity increases, are higher when the exit air is located at a height 1.2 m than when is located at 1.8 m, and are higher for summer conditions than for winter conditions. However, the values are higher for the ADI than ADTI. |
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Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systemsNumerical simulationPersonalized ventilationThermal comfortAir distribution turbulence indexDraught riskAir distribution indexAir qualityThis work evaluates the integral effect of thermal comfort (TC), indoor air quality (IAQ) and Draught Risk (DR) for desks with four personalized ventilation (PV) systems. The numerical study, for winter and summer thermal conditions, considers a virtual chamber, a desk, four different PV systems, four seats and four virtual manikins. Two different PV configurations, two upper and two lower air terminal devices (ATD) with different distance between them are considered. In this study a coupling of numerical methodology, using one differential and two integral models, is used. The heating, ventilating and air conditioning (HVAC) system performance in this work is evaluated using DR and room air removal effectiveness (ε<sub>DR)</sub> that is incorporated in an Air Distribution Index (ADI). This new index, named the Air Distribution Turbulence Index (ADTI), is used to consider simultaneously the TC, the IAQ, the DR and the effectiveness for heat removal (ε<sub>TC</sub>), contaminant removal (ε<sub>AQ</sub>) and room air removal (ε<sub>DR</sub>). The results show that the ADI and ADTI, are generally higher for Case II than for Case I, increase when the inlet air velocity increases, are higher when the exit air is located at a height 1.2 m than when is located at 1.8 m, and are higher for summer conditions than for winter conditions. However, the values are higher for the ADI than ADTI.SAICT-ALG/39586/2018 (CRESC Algarve 2020)MDPISapientiaConceição, EusébioAwbi, Hazim2021-06-11T13:26:38Z2021-06-012021-06-10T13:46:23Z2021-06-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/15619engConceição, E.; Awbi, H. Evaluation of Integral Effect of Thermal Comfort, Air Quality and Draught Risk for Desks Equipped with Personalized Ventilation Systems. Energies 2021, 14, 32351996-107310.3390/en14113235info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-24T10:28:02Zoai:sapientia.ualg.pt:10400.1/15619Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:06:26.502057Repositório 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 |
Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems |
title |
Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems |
spellingShingle |
Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems Conceição, Eusébio Numerical simulation Personalized ventilation Thermal comfort Air distribution turbulence index Draught risk Air distribution index Air quality |
title_short |
Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems |
title_full |
Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems |
title_fullStr |
Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems |
title_full_unstemmed |
Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems |
title_sort |
Evaluation of integral effect of thermal comfort, air quality and draught risk for desks equipped with personalized ventilation systems |
author |
Conceição, Eusébio |
author_facet |
Conceição, Eusébio Awbi, Hazim |
author_role |
author |
author2 |
Awbi, Hazim |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Sapientia |
dc.contributor.author.fl_str_mv |
Conceição, Eusébio Awbi, Hazim |
dc.subject.por.fl_str_mv |
Numerical simulation Personalized ventilation Thermal comfort Air distribution turbulence index Draught risk Air distribution index Air quality |
topic |
Numerical simulation Personalized ventilation Thermal comfort Air distribution turbulence index Draught risk Air distribution index Air quality |
description |
This work evaluates the integral effect of thermal comfort (TC), indoor air quality (IAQ) and Draught Risk (DR) for desks with four personalized ventilation (PV) systems. The numerical study, for winter and summer thermal conditions, considers a virtual chamber, a desk, four different PV systems, four seats and four virtual manikins. Two different PV configurations, two upper and two lower air terminal devices (ATD) with different distance between them are considered. In this study a coupling of numerical methodology, using one differential and two integral models, is used. The heating, ventilating and air conditioning (HVAC) system performance in this work is evaluated using DR and room air removal effectiveness (ε<sub>DR)</sub> that is incorporated in an Air Distribution Index (ADI). This new index, named the Air Distribution Turbulence Index (ADTI), is used to consider simultaneously the TC, the IAQ, the DR and the effectiveness for heat removal (ε<sub>TC</sub>), contaminant removal (ε<sub>AQ</sub>) and room air removal (ε<sub>DR</sub>). The results show that the ADI and ADTI, are generally higher for Case II than for Case I, increase when the inlet air velocity increases, are higher when the exit air is located at a height 1.2 m than when is located at 1.8 m, and are higher for summer conditions than for winter conditions. However, the values are higher for the ADI than ADTI. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-11T13:26:38Z 2021-06-01 2021-06-10T13:46:23Z 2021-06-01T00:00:00Z |
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/10400.1/15619 |
url |
http://hdl.handle.net/10400.1/15619 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Conceição, E.; Awbi, H. Evaluation of Integral Effect of Thermal Comfort, Air Quality and Draught Risk for Desks Equipped with Personalized Ventilation Systems. Energies 2021, 14, 3235 1996-1073 10.3390/en14113235 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
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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1799133305979797504 |