TITLE:
Enhancements of Roof Solar Chimney Performance for Building Ventilation
AUTHORS:
Pornsawan Tongbai, Tawit Chitsomboon
KEYWORDS:
Natural Ventilation, Natural Ventilation Enhancement, Solar Attic, Solar Chimney, Expanding Channel
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.6,
June
9,
2014
ABSTRACT:
A roof solar chimney (RSC) is
inclined in the roof of a building wherein solar radiation is employed to heat
the air the channel. The hot air flows up the channel which can be used to
induce flow out of the building in order to ventilate it. In this study,
parameters that affect the performance of this natural ventilation system were
investigated numerically, namely: inclination angles, channel gaps, solar
intensities, vertical chimney attachment heights and channel expanding angles.
The two last parameters were new concepts that seem to have never been studied
before. All of the mentioned parameters were found to exhibit positive effects
on the ventilation. Relative merits of these techniques were compared and
discussed.