الفهرس | Only 14 pages are availabe for public view |
Abstract A solar chimney pilot plant as a power conversion unit has been designed, built and tested in Tanta city, Egypt with 24 m chimney height and 1600 m2 collector area. Temperature distributions for th collector and soil under the collector have been measured. Air velocity and temperature at chimney entrance also have been measured. Temperature of transparent cover, air inside the collector and absorber surface are affected directly by solar radiation. They reach to their peak with peak of solar radiation. Temperature of soil at upper layer reaches to its peak with sunset and the temperature of soil at lower layer does not change during measuring periods. These temperatures have different values at different measuring positions along the radius of the collector. Air velocity increases with increasing temperature difference between air at chimney entrance and the ambient which reaches to a mean value of 5 m/s in the period between 8 AM and 4 PM at mean temperature difference value of 23.5oC and mean solar radiation vlaue of 812 W/m2. |