Abstract
There have been many advances in the solar chimney power plant since 1930 and the first pilot work was built in Spain (Manzanares) that produced 50 KW. The solar chimney power plant is considered of a clean power generation that needs to be investigated to enhance the performance by studying the effect of changing the area of passage of air to enhance the velocity towards the chimney to maximize design velocity. In this experimental and numerical study, the reduction area of solar collector was investigated. The reduction area that mean changing the height of glass cover from the absorbing plate (h1=3.8cm, h2=2.6cm and h3=1.28cm). The numerical study was performed using ANSYS Fluent software package (version 14.0) to solve governing equations. The aim of this work was to study the effect of change the height of reduction area to the design velocity (velocity move the blade of turbine at inlet in the chimney). The results showed that the third height (h3=1.28cm) gives the best result because when decreasing the height between the glass cover and absorbing plate, the area between them decreased and the design velocity increased then the efficiency of solar chimney model was increased.
Highlights
The solar chimney power plant consists of a solar air collector, a solar chimney and a turbine coupling with generator [1] .The mean aim from manufacture the solar chimney power plant to convert the power of solar radiation energy to thermal energy and by the rotation of turbine convert to mechanical energy and put the electric station in this to generate the electrical energy that’s used in different way in the life
Higher values are found at the lower collector reduction area
By decreasing the collector reduction area to 1.28 cm, the maximum achieved velocity rises to 3.15 m/s which is about an 19.04% enhancement
Summary
The solar chimney power plant consists of a solar air collector, a solar chimney and a turbine coupling with generator [1] .The mean aim from manufacture the solar chimney power plant to convert the power of solar radiation energy to thermal energy and by the rotation of turbine convert to mechanical energy and put the electric station in this to generate the electrical energy that’s used in different way in the life. Mark[2] The height of the roof inlet was adjustable, so that the ratio of flow areas between roof inlet and roof outlet could be varied. The reduction in pressure at the point of reduction area is come from the reduction in area which will draw the air flow to the region of area after the reduction. This technique could be utilized to increase heat transfer between the air flow and absorber plant and between air flow and glass cover, and to increase air velocity. The height of the roof inlet was adjustable, so that the ratio of flow areas between roof inlet and roof outlet could be varied.
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