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Could the ductless personalized ventilation be an alternative to the regular ducted personalized ventilation?

  • This study investigates the performance of two systems: personalized ventilation (PV) and ductless personalized ventilation (DPV). Even though the literature indicates a compelling performance of PV, it is not often used in practice due to its impracticality. Therefore, the present study assesses the possibility of replacing the inflexible PV with DPV in office rooms equipped with displacementThis study investigates the performance of two systems: personalized ventilation (PV) and ductless personalized ventilation (DPV). Even though the literature indicates a compelling performance of PV, it is not often used in practice due to its impracticality. Therefore, the present study assesses the possibility of replacing the inflexible PV with DPV in office rooms equipped with displacement ventilation (DV) in the summer season. Numerical simulations were utilized to evaluate the inhaled concentration of pollutants when PV and DPV are used. The systems were compared in a simulated office with two occupants: a susceptible occupant and a source occupant. Three types of pollution were simulated: exhaled infectious air, dermally emitted contamination, and room contamination from a passive source. Results indicated that PV improved the inhaled air quality regardless of the location of the pollution source; a higher PV supply flow rate positively impacted the inhaled air quality. Contrarily, the performance of DPV was highly sensitive to the source location and the personalized flow rate. A higher DPV flow rate tends to decrease the inhaled air quality due to increased mixing of pollutants in the room. Moreover, both systems achieved better results when the personalized system of the source occupant was switched off.show moreshow less

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Document Type:Article
Author:Dr.-Ing. Hayder AlsaadORCiDGND, Prof. Conrad VoelkerORCiDGND
DOI (Cite-Link):https://doi.org/10.1111/ina.12720Cite-Link
URN (Cite-Link):https://nbn-resolving.org/urn:nbn:de:gbv:wim2-20200805-42072Cite-Link
URL:https://onlinelibrary.wiley.com/doi/full/10.1111/ina.12720
Parent Title (German):Indoor Air
Publisher:John Wiley & Sons Ltd
Language:English
Date of Publication (online):2020/08/03
Date of first Publication:2020/07/18
Release Date:2020/08/05
Publishing Institution:Bauhaus-Universität Weimar
Institutes:Fakultät Bauingenieurwesen / Professur Bauphysik
Volume:2020
Pagenumber:13
Tag:computational fluid dynamics; cross-contamination; ductless personalized ventilation; indoor air quality; tracer gas
GND Keyword:Strömungsmechanik; Kontamination; Belüftung; Luftqualität
Dewey Decimal Classification:500 Naturwissenschaften und Mathematik / 530 Physik / 532 Mechanik der Fluide; Mechanik der Flüssigkeiten
600 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften / 629 Andere Fachrichtungen der Ingenieurwissenschaften
BKL-Classification:56 Bauwesen / 56.55 Bauphysik, Bautenschutz
Licence (German):License Logo Creative Commons 4.0 - Namensnennung-Nicht kommerziell (CC BY-NC 4.0)