Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/45972
Title: The impact of temperature gradient on energy consumption of displacement ventilation system in the tropics
Authors: Cheong, K.W.D. 
Yu, W.J.
Tham, K.W. 
Sekhar, S.C. 
Kosonen, R.
Keywords: Displacement ventilation
Energy consumption
Temperature gradient
Tropics
Issue Date: 2006
Source: Cheong, K.W.D.,Yu, W.J.,Tham, K.W.,Sekhar, S.C.,Kosonen, R. (2006). The impact of temperature gradient on energy consumption of displacement ventilation system in the tropics. HB 2006 - Healthy Buildings: Creating a Healthy Indoor Environment for People, Proceedings 5 : 193-196. ScholarBank@NUS Repository.
Abstract: The objective of this study was to investigate the energy consumption at different temperature gradients in a Field Environment Chamber, 11.1 m (L) × 7.5 m (W) × 2.6 m (H), served by displacement ventilation system in Singapore. Sixteen identical workstations were arranged equally into two rows and positioned at the centre of the chamber to simulate a typical office layout. Each workstation consists of a computer and a chair of upholstered with backrest. Subjects were exposed to 3 levels of vertical air temperature gradients (nominally 1, 3 & 5 K/m) between 0.1 and 1.1 m height and 3 room air temperatures of 20, 23 & 26oC at 0.6m height. During the experiment, relative humidity at 0.6m height and outside air provision were kept constant at 50% and 10 l/s/p respectively. Subjects were performing sedentary normal office work during the experiment. The duration of each session of the experiment is 3 hours. Heat sources inside the chamber were subjects and computers. The results show that at the same room air temperature and humidity level, DV system with greater temperature gradient in the tropics has higher energy saving potential.
Source Title: HB 2006 - Healthy Buildings: Creating a Healthy Indoor Environment for People, Proceedings
URI: http://scholarbank.nus.edu.sg/handle/10635/45972
ISBN: 9789899506718
Appears in Collections:Staff Publications

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