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Title: An experimental study on the performances of a radiation-based task/ambient air conditioning system applied to sleeping environments
Authors: Du, J
Chan, M 
Deng, S 
Keywords: Draft risk
Radiant panel
Sleeping environments
Task/ambient air conditioning
Thermal comfort
Issue Date: 2017
Publisher: Elsevier
Source: Energy and buildings, 2017, v. 139, p. 291-301 How to cite?
Journal: Energy and buildings 
Abstract: A sleeping person is naturally immobile in a relatively small space. Hence, task\ambient air conditioning (TAC) can be best applied to a sleeping environment because of its proven performances in energy saving. However, when using previously developed the TAC systems for sleeping environment applications, cold draft was a serious issue and could hardly be avoided due to a high air velocity and a low air temperature inside an occupied zone. Therefore, in the experimental study reported in this paper, a radiation-based TAC (R-TAC) system has been developed, and its performances experimentally evaluated. In this paper, firstly, an experimental setup for a prototype R-TAC system, and experimental conditions and methods are reported. This is followed by presenting experimental results on the thermal comfort and ventilation performance. Finally, the issues of condensation risk when using the proposed R-TAC system are discussed. The study results presented in this paper have shown that the use of the R-TAC system could not only result in better thermal comfort and ventilation performances, but also effectively resolve the cold draft problem. In addition, the potential problem of potential condensation on a surface may be resolved by raising the panel surface temperature, or using a lower fresh air supply humidity.
ISSN: 0378-7788
EISSN: 1872-6178
DOI: 10.1016/j.enbuild.2017.01.038
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