Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29618
Title: Indoor thermal comfort characteristics under the control of a direct expansion air conditioning unit having a variable-speed compressor and a supply air fan
Authors: Deng, S 
Li, Z
Qu, M
Keywords: DX A/C unit
Thermal comfort
Variable-speed
Issue Date: 2009
Publisher: Pergamon Press
Source: Applied thermal engineering, 2009, v. 29, no. 11-12, p. 2187-2193 How to cite?
Journal: Applied thermal engineering 
Abstract: Indoor thermal environment is important as it affects the health and productivity of building occupants. Direct expansion (DX) air conditioning (A/C) units are commonly used for environmental control in small- to medium-scaled buildings. This paper reports on an experimental study to investigate the indoor thermal comfort characteristics under the control of a DX A/C unit having variable-speed compressor and supply fan at a fixed space cooling load but having three different ratios between its sensible part and latent part. The experimental results suggested that under a fixed indoor total cooling load with three different space sensible heat ratios (SHRs) of 0.92, 0.72 and 0.62, varying both speeds of compressor and supply fan in the DX A/C unit would influence indoor thermal comfort. Furthermore, when a DX A/C unit having variable-speed compressor and supply fan is used for indoor thermal comfort control under abnormal indoor load conditions, its ability of indoor thermal comfort control through varying compressor speed and supply fan speed may be duly restricted.
URI: http://hdl.handle.net/10397/29618
ISSN: 1359-4311
EISSN: 1873-5606
DOI: 10.1016/j.applthermaleng.2008.10.011
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