Counter-rotating turbines for solar chimney power plants

F. Denantes and E. Bilgen

Renewable Energy, 2006, vol. 31, issue 12, 1873-1891

Abstract: An efficiency model at design performance for counter-rotating turbines is developed and validated. Based on the efficiency equations, an off-design performance model for counter-rotating turbines is developed. Combined with a thermodynamic model for a solar chimney system and a solar radiation model, annual energy output of solar chimney systems is determined. Two counter-rotating turbines, one with inlet guide vanes, the other without, are compared to a single-runner system. The design and off-design performances are weighed against in three different solar chimney plant sizes. It is shown that the counter-rotating turbines without guide vanes have lower design efficiency and a higher off-design performance than a single-runner turbine. Based on the output torque versus power for various turbine layouts, advantageous operational conditions of counter-rotating turbines are demonstrated.

Keywords: Solar chimney; Counter-rotating turbine (search for similar items in EconPapers)
Date: 2006
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Citations: View citations in EconPapers (11)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:31:y:2006:i:12:p:1873-1891

DOI: 10.1016/j.renene.2005.09.018

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