Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13742
Title: Application of displacement ventilation system to buildings in the tropics
Authors: XIE YONGHENG
Keywords: Displacement ventilation, gradient, thermal comfort, indoor air quality, energy, design guide
Issue Date: 13-Feb-2004
Source: XIE YONGHENG (2004-02-13). Application of displacement ventilation system to buildings in the tropics. ScholarBank@NUS Repository.
Abstract: Two stages of experiments were conducted. Tropical subjects were surveyed and thermal comfort, indoor air quality and energy performances were studied. Temperature gradient, humidity gradient and CO2 concentration gradient exist in all experiments. The profile of the gradient depends on the supply air flow rate and/or outdoor air flow rate. Supply air temperature, spatial air temperature and relative humidity have significant influence on subjectsa?? thermal sensation. Generally subjects have cooler thermal sensation and lower acceptability with DV system than with MV system. The ventilation efficiency is always higher for DV system. The cooling capacity for DV system is 5% lower than that for MV system. With the presence of temperature and concentration gradients, the energy consumption of the DV system could be further reduced. A model which computes the supply-return air temperature difference is developed. A preliminary design guide for buildings in the tropics is provided.
URI: http://scholarbank.nus.edu.sg/handle/10635/13742
Appears in Collections:Master's Theses (Open)

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