Thermal comfort and IAQ analysis of a decentralized DOAS system coupled with radiant cooling for the tropics

Journal article

Mahmoudi Saber, E., Iyengar, R, Mast, M, Meggers, F, Tham, KW and Leibundgut, H (2014). Thermal comfort and IAQ analysis of a decentralized DOAS system coupled with radiant cooling for the tropics. Building and Environment. 82, pp. 361-370. https://doi.org/10.1016/j.buildenv.2014.09.001
AuthorsMahmoudi Saber, E., Iyengar, R, Mast, M, Meggers, F, Tham, KW and Leibundgut, H
Abstract

The deployment of low exergy concepts in buildings, which promotes high temperature cooling HVAC systems introduces alternative solutions in the tropical climate. This study evaluates the performance of a decentralized dedicated outdoor air system combined with a radiant cooling system (decentralized DOAS-RCS) in terms of occupant thermal comfort and indoor air quality for the tropical context. Different sets of operational scenarios (experiments) have been conducted in the BubbleZERO laboratory to realize the impact of system related parameters like ventilation rate and supply chilled water temperature on thermal comfort and indoor air quality. The results show that supply chilled water temperature and space cooling load have strong impacts respectively on the capacity of decentralized units and cooling panel, which consequently influence indoor air condition. Indoor air was predicted to be in comfort range (−0.2 < PMV < 0.2) only at specific periods of the day and an automatic control was required to modulate the system under various indoor and outdoor conditions. Main challenges of implementing DDOAS coupled with radiant cooling in the tropics include the condensation risk on the radiant panels, non-uniformity of panel surface temperature and low air movement inside the space.

Keywords1201 Architecture; 1202 Building; 0502 Environmental Science And Management; Building & Construction
Year2014
JournalBuilding and Environment
Journal citation82, pp. 361-370
PublisherElsevier
ISSN0360-1323
Digital Object Identifier (DOI)https://doi.org/10.1016/j.buildenv.2014.09.001
Publication dates
Print15 Sep 2014
Publication process dates
Deposited06 Dec 2017
Accepted01 Sep 2014
Accepted author manuscript
License
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Open
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