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Article: Investigation of Particle Deposition on a Micropatterned Surface as an Energy-efficient Air Cleaning Technique in Ventilation Ducting Systems

TitleInvestigation of Particle Deposition on a Micropatterned Surface as an Energy-efficient Air Cleaning Technique in Ventilation Ducting Systems
Authors
KeywordsJing Wang
Issue Date2020
PublisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/02786826.asp
Citation
Aerosol Science and Technology, 2020, v. 54 n. 10, p. 1210-1222 How to Cite?
AbstractBuilding ventilation ducting systems play a core role in controlling indoor air quality by recirculating the indoor air and mixing with ambient air. The ventilation system can serve as an air cleaning system itself either through the filtration system or integrating other means, while at the same time, attention to energy consumption is needed. The high-efficiency fibrous filters in a conventional filtration system not only cause high-pressure drops that consume fan energy but also add to the high operation cost. This article proposes an air cleaning technique, aimed at submicron particles, by means of installing patterned surfaces on the walls of ventilation ducts, which can be easily cleaned by water and reused. The effect of patterned surfaces on particle deposition was studied numerically. In the numerical simulation, the Reynolds stress turbulent model was correlated at the near-wall regions by turbulent velocity fluctuation at the normal direction. Particle trajectory was solved by using Lagrangian particle tracking. The numerical model was then validated with a particle deposition experiment. A wind tunnel experiment was carried out to quantify the particle deposition on the semicircular micropatterns for a wide range of heights. Based on our numerical results, the semicircular pattern height of 500 µm with a pitch-to-height ratio (p/e) of 10 has 8.58 times enhancement of the energy efficiency compared with a high-efficiency particulate air filter. Our results indicated that adding surface micropatterns to ventilation ducting for submicron particle deposition is a possible energy-efficient air cleaning technique for practical usage.
Persistent Identifierhttp://hdl.handle.net/10722/285062
ISSN
2023 Impact Factor: 2.8
2023 SCImago Journal Rankings: 0.762
ISI Accession Number ID
Grants

 

DC FieldValueLanguage
dc.contributor.authorXu, H-
dc.contributor.authorFu, SC-
dc.contributor.authorChan, KC-
dc.contributor.authorChao, CYH-
dc.date.accessioned2020-08-07T09:06:13Z-
dc.date.available2020-08-07T09:06:13Z-
dc.date.issued2020-
dc.identifier.citationAerosol Science and Technology, 2020, v. 54 n. 10, p. 1210-1222-
dc.identifier.issn0278-6826-
dc.identifier.urihttp://hdl.handle.net/10722/285062-
dc.description.abstractBuilding ventilation ducting systems play a core role in controlling indoor air quality by recirculating the indoor air and mixing with ambient air. The ventilation system can serve as an air cleaning system itself either through the filtration system or integrating other means, while at the same time, attention to energy consumption is needed. The high-efficiency fibrous filters in a conventional filtration system not only cause high-pressure drops that consume fan energy but also add to the high operation cost. This article proposes an air cleaning technique, aimed at submicron particles, by means of installing patterned surfaces on the walls of ventilation ducts, which can be easily cleaned by water and reused. The effect of patterned surfaces on particle deposition was studied numerically. In the numerical simulation, the Reynolds stress turbulent model was correlated at the near-wall regions by turbulent velocity fluctuation at the normal direction. Particle trajectory was solved by using Lagrangian particle tracking. The numerical model was then validated with a particle deposition experiment. A wind tunnel experiment was carried out to quantify the particle deposition on the semicircular micropatterns for a wide range of heights. Based on our numerical results, the semicircular pattern height of 500 µm with a pitch-to-height ratio (p/e) of 10 has 8.58 times enhancement of the energy efficiency compared with a high-efficiency particulate air filter. Our results indicated that adding surface micropatterns to ventilation ducting for submicron particle deposition is a possible energy-efficient air cleaning technique for practical usage.-
dc.languageeng-
dc.publisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/titles/02786826.asp-
dc.relation.ispartofAerosol Science and Technology-
dc.rightsThis is an Accepted Manuscript of an article published by Taylor & Francis in Aerosol Science and Technology on 29 May 2020, available online: http://www.tandfonline.com/10.1080/02786826.2020.1767758-
dc.subjectJing Wang-
dc.titleInvestigation of Particle Deposition on a Micropatterned Surface as an Energy-efficient Air Cleaning Technique in Ventilation Ducting Systems-
dc.typeArticle-
dc.identifier.emailFu, SC: scfu@hku.hk-
dc.identifier.emailChan, KC: mekcchan@hku.hk-
dc.identifier.emailChao, CYH: cyhchao@hku.hk-
dc.identifier.authorityFu, SC=rp02549-
dc.identifier.authorityChao, CYH=rp02396-
dc.description.naturepostprint-
dc.identifier.doi10.1080/02786826.2020.1767758-
dc.identifier.scopuseid_2-s2.0-85086521964-
dc.identifier.hkuros312234-
dc.identifier.volume54-
dc.identifier.issue10-
dc.identifier.spage1210-
dc.identifier.epage1222-
dc.identifier.isiWOS:000542574900001-
dc.publisher.placeUnited States-
dc.relation.projectInvestigation of enhancement of particle deposition by micro-structured surfaces in turbulent flows-
dc.identifier.issnl0278-6826-

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