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Research Papers

Thermoeconomic Optimization of a Solar Chimney Power Plant

[+] 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 130(2), 021015 (Apr 01, 2008) (9 pages) doi:10.1115/1.2840571 History: Received November 14, 2006; Revised October 29, 2007; Published April 01, 2008

No physical optimum solar chimney power plant exists when only regarding the dimensions of such a plant. However, if construction costs are introduced, thermoeconomically optimal plant configurations may be established. This paper investigates the thermoeconomic optimization of a large-scale solar chimney power plant. Initially, relevant dimensions are selected, which are to be optimized. An approximated cost model is then developed, giving the capacity for finding optimum plant dimensions for different cost structures. Multiple computer simulations are performed and results are compared to the approximated cost of each specific plant. Thermoeconomically optimal plant configurations are obtained.

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Copyright © 2008 by American Society of Mechanical Engineers
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Figures

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Figure 1

Schematic illustration of a solar chimney power plant

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Figure 2

Approximate annual power output for various solar chimney power plant configurations, for plants with a chimney height of Hc=500m

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Figure 3

Approximate annual power output for various solar chimney power plant configurations, for plants with a chimney height of Hc=1000m

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Figure 4

Approximate annual power output for various solar chimney power plant configurations, for plants with a chimney height of Hc=1500m

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Figure 5

Approximate specific cost for various solar chimney power plant configurations, for plants with a chimney height of Hc=500m

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Figure 6

Approximate specific cost for various solar chimney power plant configurations, for plants with a chimney height of Hc=1000m

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Figure 7

Approximate specific cost for various solar chimney power plant configurations, for plants with a chimney height of Hc=1500m

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