Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Efficient removal of indoor particulate matter using water microdroplets generated by a MHz-frequency ultrasonic atomizer
https://orcid.org/0000-0002-3776-7067
https://orcid.org/0000-0003-3286-5941
Abstract Airborne particulate matter (PM) has emerged as an important global environmental and social issue due to its harmful health effects. Various techniques have been introduced to remove indoor PM. However, an effective and sustainable method has not been established yet because of complex mechanisms and various factors. Here, we propose the use of water microdroplets generated by a MHz-frequency ultrasound, and experimentally examine the effects of the generated microdroplets on PM removal. The PM removal efficiency and PM deposition constant are analyzed by measuring the temporal variation of PM concentration. The measured experimental results are compared with analytical deposition constants. Two collection efficiencies derived in previous studies are employed to substitute a mathematical model used for determining the analytical deposition constants. In addition, the mean diameter and the moving velocity of the microdroplets are experimentally measured via a digital holographic microscopy and particle image velocimetry generated by a MHz-frequency atomizer. The present results demonstrate that water microdroplets generated by the atomizer can be effectively used to remove PM.
Graphical abstract Display Omitted
Highlights PM10 and PM2.5 removal efficiency increases by using water microdroplets. Collection efficiencies noticeably increase compared with previous studies. PIV and DHM are utilized to verify flow velocity and mean diameter of water droplets. Experimental and analytical PM deposition constants are quantitatively compared.
Efficient removal of indoor particulate matter using water microdroplets generated by a MHz-frequency ultrasonic atomizer
https://orcid.org/0000-0002-3776-7067
https://orcid.org/0000-0003-3286-5941
Abstract Airborne particulate matter (PM) has emerged as an important global environmental and social issue due to its harmful health effects. Various techniques have been introduced to remove indoor PM. However, an effective and sustainable method has not been established yet because of complex mechanisms and various factors. Here, we propose the use of water microdroplets generated by a MHz-frequency ultrasound, and experimentally examine the effects of the generated microdroplets on PM removal. The PM removal efficiency and PM deposition constant are analyzed by measuring the temporal variation of PM concentration. The measured experimental results are compared with analytical deposition constants. Two collection efficiencies derived in previous studies are employed to substitute a mathematical model used for determining the analytical deposition constants. In addition, the mean diameter and the moving velocity of the microdroplets are experimentally measured via a digital holographic microscopy and particle image velocimetry generated by a MHz-frequency atomizer. The present results demonstrate that water microdroplets generated by the atomizer can be effectively used to remove PM.
Graphical abstract Display Omitted
Highlights PM10 and PM2.5 removal efficiency increases by using water microdroplets. Collection efficiencies noticeably increase compared with previous studies. PIV and DHM are utilized to verify flow velocity and mean diameter of water droplets. Experimental and analytical PM deposition constants are quantitatively compared.
Efficient removal of indoor particulate matter using water microdroplets generated by a MHz-frequency ultrasonic atomizer
https://orcid.org/0000-0002-3776-7067
https://orcid.org/0000-0003-3286-5941
Abstract Airborne particulate matter (PM) has emerged as an important global environmental and social issue due to its harmful health effects. Various techniques have been introduced to remove indoor PM. However, an effective and sustainable method has not been established yet because of complex mechanisms and various factors. Here, we propose the use of water microdroplets generated by a MHz-frequency ultrasound, and experimentally examine the effects of the generated microdroplets on PM removal. The PM removal efficiency and PM deposition constant are analyzed by measuring the temporal variation of PM concentration. The measured experimental results are compared with analytical deposition constants. Two collection efficiencies derived in previous studies are employed to substitute a mathematical model used for determining the analytical deposition constants. In addition, the mean diameter and the moving velocity of the microdroplets are experimentally measured via a digital holographic microscopy and particle image velocimetry generated by a MHz-frequency atomizer. The present results demonstrate that water microdroplets generated by the atomizer can be effectively used to remove PM.
Graphical abstract Display Omitted
Highlights PM10 and PM2.5 removal efficiency increases by using water microdroplets. Collection efficiencies noticeably increase compared with previous studies. PIV and DHM are utilized to verify flow velocity and mean diameter of water droplets. Experimental and analytical PM deposition constants are quantitatively compared.
Efficient removal of indoor particulate matter using water microdroplets generated by a MHz-frequency ultrasonic atomizer
Kim, Jeongju (Autor:in) / Kim, Jeong Jae (Autor:in) / Lee, Sang Joon (Autor:in)
Building and Environment ; 175
08.03.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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