The paper investigates the flow through a representative tall solar chimney with seven sets of internal bracing wheels with radial spokes. The paper presents experimental data measured in a 0.63 m diameter laboratory scale chimney model with and without bracing wheels. A fan at one end of the chimney model either sucked or blew the flow through it. The measured friction pressure drop was higher than theoretical values for smooth walls, and swirling, blown flow increased it by another 12%. The seven bracing wheels, each had twelve spokes, each spoke consisting of a pair of rectangular section bars, caused order of magnitude larger pressure drops than wall friction. For the sucked-through flow the forced, swirling, disturbed flow increased the pressure drop by up to 36%. Bracing wheels also increased the exit kinetic energy coefficient to 1.26 with the last wheel at the chimney exit. This effect could in combination with the bracing wheel drag reduce flow through the chimney. Designers of large chimneys should take care to minimise the number of bracing wheels, and possibly to streamline spoke sections. If possible, the top bracing wheel should be far enough from the exit for the flow to reattach to the wall after passing over the spoke attachment rim at the wall.
Skip Nav Destination
ASME Solar 2002: International Solar Energy Conference
June 15–20, 2002
Reno, Nevada, USA
Conference Sponsors:
- Solar Energy Division
ISBN:
0-7918-1689-3
PROCEEDINGS PAPER
Pressure Drop in Solar Power Plant Chimneys
Theodore W. von Backstro¨m,
Theodore W. von Backstro¨m
University of Stellenbosch, Matieland, South Africa
Search for other works by this author on:
Andreas Bernhardt,
Andreas Bernhardt
University of Stellenbosch, Matieland, South Africa
Search for other works by this author on:
Anthony J. Gannon
Anthony J. Gannon
University of Stellenbosch, Matieland, South Africa
Search for other works by this author on:
Theodore W. von Backstro¨m
University of Stellenbosch, Matieland, South Africa
Andreas Bernhardt
University of Stellenbosch, Matieland, South Africa
Anthony J. Gannon
University of Stellenbosch, Matieland, South Africa
Paper No:
SED2002-1068, pp. 319-323; 5 pages
Published Online:
January 5, 2009
Citation
von Backstro¨m, TW, Bernhardt, A, & Gannon, AJ. "Pressure Drop in Solar Power Plant Chimneys." Proceedings of the ASME Solar 2002: International Solar Energy Conference. Solar Energy. Reno, Nevada, USA. June 15–20, 2002. pp. 319-323. ASME. https://doi.org/10.1115/SED2002-1068
Download citation file:
7
Views
Related Proceedings Papers
Related Articles
Pressure Drop in Solar Power Plant Chimneys
J. Sol. Energy Eng (May,2003)
Calculation of Pressure and Density in Solar Power Plant Chimneys
J. Sol. Energy Eng (February,2003)
S-Ethane Brayton Power Conversion Systems for Concentrated Solar Power Plant
J. Sol. Energy Eng (February,2016)
Related Chapters
The Special Characteristics of Closed-Cycle Gas Turbines
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Historical Development of the Windmill
Wind Turbine Technology: Fundamental Concepts in Wind Turbine Engineering, Second Edition
Hydraulic Resistance
Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications