DESIGN OF SOLAR CHIMNEY WITH SPHERICAL COLLECTOR FOR ELECTRICITY PRODUCTION

The present paper presents an analytical investigation of spherical collector solar chimney with base diameters of 500, 400, 300, 200 and 150m, collector height of 1.5m and convergent nozzle diameter of 1.5m. Results were obtained for variation of instantaneous power output with (τ) for spherical collector and compared with previous circular collector. It was shown that the output power increases exponentially with (τ). The minimum value of threshold (τ) beyond which appreciable power of (1000w) can be produced by a viable solar chimney power generation is about 3.5. therefore the power increases suddenly after each threshold value of (τ). Spherical collector gives higher power output than circular collector.