Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16315
Title: Thermal comfort and indoor air quality evaluation of a ceiling mounted personalized ventilation system integrated with an ambient mixing ventilation system
Authors: YANG BIN
Keywords: ceiling mounted PV, thermal comfort, perceived air quality, energy savings, objective measurements, subjective assessments
Issue Date: 30-Nov-2009
Source: YANG BIN (2009-11-30). Thermal comfort and indoor air quality evaluation of a ceiling mounted personalized ventilation system integrated with an ambient mixing ventilation system. ScholarBank@NUS Repository.
Abstract: As the contribution towards the goal of excellent and sustainable indoor environment, Ceiling mounted Personalized Ventilation (PV) has been developed based on conventional PV system. Personalized air, which is fresh, dry and cool, is supplied into breathing zone by ceiling mounted PV air terminal devices (ATD) without extending ducts into breathing zone. As a result, indoor aesthetics and flexibility of distributing indoor furniture are improved. However, the airflow characteristics and subjective assessments to this system have not been explored.The first objective of this study is to evaluate the performance of prototype of ceiling mounted PV ATDs, with emphasis being placed on air movements characteristics around human bodyo< cooling effect, draft rating, inhaled air temperature and inhaled air quality. This study is conducted at the Technical University of Denmark. The second objective of this study is to investigate the responses from tropically-acclimatized subjects to the local environment created with ceiling mounted PV system, with emphasis being placed on thermal sensation, air movement perception, acceptability and preference, perceived air temperature and perceived air quality. This study is conducted in Singapore, a place with hot and humid climate.For the first purpose, thermal breathing manikin is utilized as main experimental facility, which can simulate breathing and heat generation of real person, give quantitatively evaluation of cooling effect for different body segments under this ceiling mounted PV system. The characteristics of flow field are measured by thermal anemometer.For the second purpose, 32 tropically acclimatized subjects are chosen to give their assessment to ceiling mounted PV system with emphasis on thermal sensation, thermal comfort, air movement perception, acceptability and preference, perceived inhaled air quality and temperature, feeling of indoor environment. This study reveals the feasibility of the newly developed ceiling mounted PV system for practical use in Tropic climate.
URI: http://scholarbank.nus.edu.sg/handle/10635/16315
Appears in Collections:Ph.D Theses (Open)

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