Experimental and numerical analysis of air and radiant cooling systems in offices

This paper analyses office cooling systems based on all air mixing ventilation systems alone or coupled with radiant ceiling panels. This last solution may be effectively applied to retrofit all air systems that are no longer able to maintain a suitable thermal comfort in the indoor environment, for...

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Bibliographic Details
Published in:Building and environment 2009-04, Vol.44 (4), p.801-806
Main Authors: Corgnati, S.P., Perino, M., Fracastoro, G.V., Nielsen, P.V.
Format: Article
Language:English
Subjects:
ADPI
Applied sciences
Building technical equipments
Buildings
Buildings. Public works
Cold radiant ceiling panels
Commercial building
Cooling systems
Draft risk
Environmental engineering
Exact sciences and technology
Indoor environments
Jet throw
Mixing ventilation
Q1
Room air distribution
Simulation
Types of buildings
Ventilation
Ventilation. Air conditioning
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Summary:This paper analyses office cooling systems based on all air mixing ventilation systems alone or coupled with radiant ceiling panels. This last solution may be effectively applied to retrofit all air systems that are no longer able to maintain a suitable thermal comfort in the indoor environment, for example in offices with high thermal loads. This study was performed by means of CFD simulations previously validated through an experimental campaign performed in a full scale test room, simulating a typical two-desk office equipped with an all air mixing ventilation system. The numerical studies were then extended to the coupled mixing ventilation and cold radiant ceiling panels. In particular, attention was drawn on the evaluation of the main supply jet properties (throw and penetration length) and on the draft risk caused by the cold air drop into the occupied zone. The study shows that such a problem can be effectively reduced applying cold radiant ceiling panels.
ISSN:0360-1323
1873-684X
DOI:10.1016/j.buildenv.2008.05.022