Abstract
In this work the effect of the inclusion a second roof on the power output of chimney solar power plant (SCPP) were investigated numerically through analytical model. The analytical model presented in this work based on energy balance equations and mass conservation equation at steady state. In second step, the proposed analytical model is then used to estimate the annual electricity production in Sétif, a region of Algeria. For the position of the sun in Setif is 36.19 degrees longitude and 5.41 degrees latitude. It appears from results obtained that the efficiency is increased by 28.7 % for the chimney solar power plant (SCPP) with the secondary roof compared to chimney solar power plant (SCPP) without second roof. It was also concluded that there is an optimal height of the second roof for the power output of chimney solar power plant (SCPP) to remain maximum. It is noted that the energy production increases with the increase in radiation and ambient temperature. However, the solar irradiation is the dominant factor on the electricity production of the chimney solar power plant, compared to the ambient temperature. The results obtained are in good agreement with the experimental results of a prototype plant in MANAZANARES.
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