Solar Chimney Power Plant Performance

[+] Author and Article Information
Johannes P. Pretorius

Department of Mechanical Engineering, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africajpp@sun.ac.za

Detlev G. Kröger

Department of Mechanical Engineering, University of Stellenbosch, Private Bag X1, Matieland 7602, South Africadgk@sun.ac.za

J. Sol. Energy Eng 128(3), 302-311 (Jan 23, 2006) (10 pages) doi:10.1115/1.2210491 History: Received November 02, 2005; Revised January 23, 2006

This paper evaluates the performance of a large-scale solar chimney power plant. The study considers the performance of a particular reference plant under specified meteorological conditions at a reference location in South Africa. A computer simulation program is employed to solve the governing conservation and draught equations simultaneously. Newly developed convective heat transfer and momentum equations are included in the numerical model and multiple simulations are performed. Results indicate 24hr plant power production, while illustrating considerable daily and seasonal power output variations. It is shown that plant power production is a function of the collector roof shape and inlet height.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 1

Schematic illustration of a solar chimney power plant

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Figure 2

Maximum electrical power output for simulated reference plant over a 24hr period

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Figure 3

Temperature distribution in the ground near the ground surface

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Figure 4

Temperature distribution in the ground

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Figure 5

Annual power output for various roof shapes and collector inlet heights



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