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Enhancement of Indoor Air Quality with a Displacement Ventilation System Comprising a 4-Way Fan Coil Unit and Multiple Air Purifiers

Author

Listed:
  • Su-Hoon Park

    (School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

  • Ik-Hyun An

    (School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

  • Yong-Ho Lee

    (School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

  • Sang-Hyun Cho

    (School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

  • Chang-Hoon Lee

    (School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

  • Sang-Bum Seo

    (School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

  • Hyun-Woo Lee

    (EURUS, Hwaseong-si 18545, Republic of Korea)

  • Se-Jin Yook

    (School of Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea)

Abstract

In indoor spaces without mechanical ventilation systems, a common approach involves using a ceiling-mounted 4-way fan coil unit (4WFCU) to regulate indoor temperature and placing floor-level air purifiers (APs) to remove indoor pollutants. This study introduces a differentiated displacement ventilation system (DVS) that connects multiple APs to the 4WFCU using ductwork. The age of air was compared between the case where the newly designed DVS was implemented and the reference case where 4WFCU and APs operated independently. When there were no obstacles in the office central area, the reference system exhibited a lower age of air. Conversely, when obstacles such as desks and partitions were present in the central area, the proposed DVS was found to improve indoor air quality. The DVS resulted in minimal interference among pathlines of the air discharged from multiple floor-level APs and their efficient suction through the ceiling-mounted 4WFCU and diffusers, significantly reducing stagnant air zones, while pathlines of the air discharged from the 4WFCU and APs interfered significantly when they operated independently, leading to larger stagnant areas in the air distribution. Therefore, modifying office spaces with ceiling-mounted 4WFCUs using the proposed DVS is anticipated to substantially enhance indoor air quality through a straightforward installation process.

Suggested Citation

  • Su-Hoon Park & Ik-Hyun An & Yong-Ho Lee & Sang-Hyun Cho & Chang-Hoon Lee & Sang-Bum Seo & Hyun-Woo Lee & Se-Jin Yook, 2024. "Enhancement of Indoor Air Quality with a Displacement Ventilation System Comprising a 4-Way Fan Coil Unit and Multiple Air Purifiers," Sustainability, MDPI, vol. 16(5), pages 1-17, February.
  • Handle: RePEc:gam:jsusta:v:16:y:2024:i:5:p:1740-:d:1342369
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