SOLAR CHIMNEY FOR ENHANCED STACK VENTILATION

A steady state mathematical model has been developed for a solar chimn ey which is used to enhance the effect of thermally induced ventilatio n in buildings. The model takes into consideration different sizes of the openings of a solar chimney with varying values of the discharge c oefficients. Numerical calculations performed for different values of ambient temperature and solar radiation show that a solar collector ar ea of 2.25 (m2) is able to induce an airflow between 140 (m3/hr) to 33 0 (M3/hr) for solar radiation of 200 ( W/m2) and 1000 (W/M2) respectiv ely.