LoginA numerical study was carried out to gain an understanding of the ventilation performance of solar chimneys with uniform heat flux from both walls. Results showed that a currently available predication method, which has been validated with narrow chimneys, may not be suitable for wide chimneys. It was also shown that for geometrically similar chimneys, the ventilation flow rate, Q, increases with the solar radiation intensity, q, and the chimney height, H, and can be well correlated by Q q1/3H4/3 regardless of height/gap ratio and the occurrence of reverse flows. Based on the numerical results, a multi-column solar chimney design is proposed, which can achieve a significant increase in ventilation flow rate compared to conventional single-column solar chimney designs.
A numerical study of a solar chimney with uniform wall heat flux.
Year:
2001
Bibliographic info:
Hong Kong, City University, Division of Building Science and Technology, 2001, proceedings of IAQVEC 2001, "Indoor Air Quality, Ventilation and Energy Conservation in Buildings: Fourth International Conference", held Changsha, Hunan, China, 2-5 October, 2