Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter
A novel displacement ventilation system (DVS) was designed using a four-way cassette fan coil unit (FCU) and air purifiers (APs) for supplying clean air. The proposed DVS in this study involved drawing indoor air through the FCU and diffusers installed in the ceiling, controlling air temperature usi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-01-01
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| Series: | Buildings |
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| Online Access: | https://www.mdpi.com/2075-5309/14/1/115 |
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| author | Ik-Hyun An Su-Hoon Park Yong-Ho Lee Chang-Hoon Lee Sang-Bum Seo Sang-Hyun Cho Hyun-Woo Lee Se-Jin Yook |
| author_facet | Ik-Hyun An Su-Hoon Park Yong-Ho Lee Chang-Hoon Lee Sang-Bum Seo Sang-Hyun Cho Hyun-Woo Lee Se-Jin Yook |
| author_sort | Ik-Hyun An |
| collection | DOAJ |
| description | A novel displacement ventilation system (DVS) was designed using a four-way cassette fan coil unit (FCU) and air purifiers (APs) for supplying clean air. The proposed DVS in this study involved drawing indoor air through the FCU and diffusers installed in the ceiling, controlling air temperature using the FCU, and then discharging it back into the office through the APs placed on the floor. The comparative ventilation system considered was the typical mixing ventilation system (MVS) that intakes and exhausts indoor air using diffusers installed on the ceiling. The local mean age of air was used as an index to compare indoor air quality between DVS and MVS under winter heating conditions. It was found that the DVS was more effective in improving indoor air quality in winter than the MVS. Moreover, compared to the MVS, utilizing the DVS designed in this study resulted in the advantage of a much more uniform air temperature variation in the office space. Therefore, it is anticipated that modifying the structure of an indoor space with an FCU installed in the ceiling and APs on the floor to use the DVS designed in this study would greatly assist in enhancing indoor air quality. |
| first_indexed | 2024-03-08T09:57:00Z |
| format | Article |
| id | doaj.art-8f879c463ca24db092d86ee4cf50d7fb |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-08T09:57:00Z |
| publishDate | 2024-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-8f879c463ca24db092d86ee4cf50d7fb2024-01-29T13:48:43ZengMDPI AGBuildings2075-53092024-01-0114111510.3390/buildings14010115Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during WinterIk-Hyun An0Su-Hoon Park1Yong-Ho Lee2Chang-Hoon Lee3Sang-Bum Seo4Sang-Hyun Cho5Hyun-Woo Lee6Se-Jin Yook7School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of KoreaSchool of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of KoreaSchool of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of KoreaSchool of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of KoreaSchool of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of KoreaSchool of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of KoreaEURUS, Hwaseong-si 18545, Republic of KoreaSchool of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of KoreaA novel displacement ventilation system (DVS) was designed using a four-way cassette fan coil unit (FCU) and air purifiers (APs) for supplying clean air. The proposed DVS in this study involved drawing indoor air through the FCU and diffusers installed in the ceiling, controlling air temperature using the FCU, and then discharging it back into the office through the APs placed on the floor. The comparative ventilation system considered was the typical mixing ventilation system (MVS) that intakes and exhausts indoor air using diffusers installed on the ceiling. The local mean age of air was used as an index to compare indoor air quality between DVS and MVS under winter heating conditions. It was found that the DVS was more effective in improving indoor air quality in winter than the MVS. Moreover, compared to the MVS, utilizing the DVS designed in this study resulted in the advantage of a much more uniform air temperature variation in the office space. Therefore, it is anticipated that modifying the structure of an indoor space with an FCU installed in the ceiling and APs on the floor to use the DVS designed in this study would greatly assist in enhancing indoor air quality.https://www.mdpi.com/2075-5309/14/1/115indoor air qualityage of airdisplacement ventilation systemmixing ventilation system |
| spellingShingle | Ik-Hyun An Su-Hoon Park Yong-Ho Lee Chang-Hoon Lee Sang-Bum Seo Sang-Hyun Cho Hyun-Woo Lee Se-Jin Yook Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter Buildings indoor air quality age of air displacement ventilation system mixing ventilation system |
| title | Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter |
| title_full | Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter |
| title_fullStr | Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter |
| title_full_unstemmed | Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter |
| title_short | Comparison of Local Mean Age of Air between Displacement Ventilation System and Mixing Ventilation System in Office Heating Conditions during Winter |
| title_sort | comparison of local mean age of air between displacement ventilation system and mixing ventilation system in office heating conditions during winter |
| topic | indoor air quality age of air displacement ventilation system mixing ventilation system |
| url | https://www.mdpi.com/2075-5309/14/1/115 |
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