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Title: Study of enhanced displacement ventilation in office environment in the tropics
Keywords: displacement ventilation, enhancement, thermal comfort, indoor air quality, fans
Issue Date: 22-Jan-2010
Citation: SUN WEIMENG (2010-01-22). Study of enhanced displacement ventilation in office environment in the tropics. ScholarBank@NUS Repository.
Abstract: A novel idea of bringing cool air near the floor upward via 4 fans mounted at each corner of a chair was developed to enhance the performance of the conventional displacement ventilation (DV) system in small premises. Both objective measurements and subjective assessments were carried out to investigate the effects of the novel system on the vertical temperature profiles, thermal acceptability by tropically acclimatized subjects and cross-contamination characteristic by varying supply air temperatures, fan speeds and fan air discharge angles. The results revealed that the vertical temperature stratification was strengthened with fans, and the thermal sensation was improved, especially at high ambient air temperature such as 26 ?C. Calf, waist, foot and arm were identified as the most affected body segments. The transportation of exhaled air between occupants increased when the fans was used since they caused mixing of the exhaled air with the room air.
Appears in Collections:Ph.D Theses (Open)

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