American Journal of Mechanical and Industrial Engineering
Volume 5, Issue 2, March 2020, Pages: 15-23
Received: May 21, 2020;
Accepted: Jun. 9, 2020;
Published: Jun. 23, 2020
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Tamerat Demeke Agonafer, Mechanical Engineering Department, Debre Berhan University, Debre Berhan, Ethiopia
The solar chimney is an innovation, which has been as of now demonstrated of being able to create electrical vitality from the sun likewise it has been introduced in different structures for ventilation, and next to no is thought about their genuine presentation and very panics are the application. This research work deals with the development of a physical, mathematical and computational models of roof solar chimney to rationalize the performance of ventilate in residential house. A thermal model enables to easily determine the inclination angle, absorber area, cavity width of the chimney and the air flow rate, using MATLAB. The simulation has been done for selected residential house of 264m3 located at Bahir Dar city, Ethiopia @ 11° latitude and 37° longitude. At comfort air speed (2m/s), a south faced system being tilted at an angle of 45° will have absorber length, the absorber height and cavity width about 3m, 4.24m, and 0.5m respectively. This will enable the residential house to circulate the air 560kg per hour. The maximum air temperature obtained at chimney outlet is 44.5°C. For a month of April an average solar intensity value is 900 W/m2. The main factor to induce buoyancy is solar insolation since it directly influences the air temperature, and the efficiency is about 44.4%.
Tamerat Demeke Agonafer,
Ventilation Performance Investigation of Roof Top Solar Chimney, American Journal of Mechanical and Industrial Engineering.
Vol. 5, No. 2,
2020, pp. 15-23.
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