An experimental study on the performances of a radiation-based task/ambient air conditioning system applied to sleeping environments

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 applica...

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Bibliographic Details
Published in:Energy and buildings 2017-03, Vol.139, p.291-301
Main Authors: Du, Jing, Chan, Mingyin, Deng, Shiming
Format: Article
Language:English
Subjects:
Air conditioners
Air conditioning
Air temperature
Condensation
Draft risk
Drafting software
Energy conservation
Energy consumption
HVAC
Hydronic heating
Radiant panel
Radiation
Sleep
Sleeping environments
Task/ambient air conditioning
Temperature effects
Thermal comfort
Thermal energy
Velocity
Ventilation
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Summary: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
1872-6178
DOI:10.1016/j.enbuild.2017.01.038