Performance Analysis of Solar Chimney Power Plant from Geothermal Waste Heat Source a Case of Aluto-Langano, Ethiopia.

Abstract In this paper, the transient thermal simulation on working fluid of solar updraft power plant using waste water was investigated to characterize the enhancement by numerical and theoretical method. Numerical solution technique used to solve a differential equation form of governing equations using finite difference discretization scheme. Most of the researches done on geometrical parameters to perform the mathematical modeling. This paper combines some of the above improvements on the performance of plant and combines them with new idea of heat source as waste heat in Aluto Langano geothermal power plant. Moreover, this study using dimensions of plant constructed in Manzanares, Spain height of chimney = 194.6 m, diameter of collector = 244 m, diameter of chimney = 10.16 m. The obtained result, the collector temperature increases by 7°C, the pressure potential is found 182.82 Pa, the pressure drop on the turbine was 121.88 Pa, the pressure loss was 60.94 Pa and the power output 123.59 kW. As a result, the collector efficiency increases to 43.58% and the overall efficiency of plant to 0.242%. Key: solar chimney, collector efficiency, thermal simulation