0
Research Papers

Combined Convective-Radiative Thermal Analysis of an Inclined Rooftop Solar Chimney

[+] Author and Article Information
Charline Seytier

Principal
ThermaVerde,
54 Bis Avenue Georges Clémenceau,
Noisy le Grand, 93160 France
e-mail: charline.seytier@themaverde.fr

Mohammad H. Naraghi

Professor
ASME Fellow
Department of Mechanical Engineering,
Manhattan College,
Riverdale, NY 10471
e-mail: mohammad.naraghi@manhattan.edu

1The work was performed when the lead author was a graduate student as a part of dual Master program with ECAM, Lyon, France.

2Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the JOURNAL OF SOLAR ENERGY ENGINEERING. Manuscript received August 22, 2011; final manuscript received June 13, 2012; published online August 9, 2012. Assoc. Editor: Gregor P. Henze.

J. Sol. Energy Eng 135(1), 011009 (Aug 09, 2012) (8 pages) Paper No: SOL-11-1182; doi: 10.1115/1.4007090 History: Received August 22, 2011; Revised June 13, 2012

A model for the combined spectral radiative and convective heat transfer analysis of solar chimneys is developed. The radiation part of this model is based on the spectral distribution of the solar heat flux and spectral radiative properties of solar chimney components. Two approaches are used for the convective part of this model, empirical correlations and a CFD analysis. The empirical correlations are based on the stack effect correlation for airflow motion and a convective heat transfer correlation for the heat transfer coefficient. The empirical correlations are used to obtain an initial estimation of surface temperatures, which are then used in the CFD model to determine an improved estimation of the heat transfer coefficients and airflow rate. Iterating between the spectral radiative and the CFD models resulted in a converged set of values for the solar chimney airflow rate and its thermal characteristics. The model is used to predict the airflow rate for various configurations and solar irradiances of solar chimneys.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by ASME
Your Session has timed out. Please sign back in to continue.

References

Schlaich, J., Bergermann, R., Schiel, W., and Weinrebe, G., 2003, “Design of Commercial Solar Tower Systems: Utilization of Solar Induced Convective Flow for Power Generation,” Proceedings of the 2003 International Solar Energy Conference, Kohala Coast, Hawaii, March 15–18, 2003, ASME Paper No. ISEC2003-44057. [CrossRef]
Trieb, F., Langniβ, O., and Klaiβ, H., 1997, “Solar Electricity Generation—A Comparative View of Technologies, Costs and Environmental Impact,” Sol. Energy, 59, pp. 89–99. [CrossRef]
Mills, D., 2004, “Advances in Solar Thermal Electricity Technology,” Sol. Energy, 76, pp. 19–31. [CrossRef]
Onyango, F. N., and Ochieng, R. M., 2006, “The Potential of Solar Chimney for Application in Rural Areas of Developing Countries,” Fuel, 85, pp. 2561–2566. [CrossRef]
Dai, Y. J., Huang, H. B., and Wang, R. Z., 2003, “Case Study of Solar Chimney Power Plants in Northwestern Regions of China,” Renewable Energy, 28, pp. 1295–1304. [CrossRef]
Bilgen, E., and Rheault, J., 2005, “Solar Chimney Power Plants for High Latitudes,” Sol. Energy, 79, pp. 449–458. [CrossRef]
Arce, J., Xaman, J. P., Alvarez, G., Jiménez, M. J., and Heras, M. R., 2009, “A Parametetric Study of Conjugate Heat Transfer of Solar Chimney,” Proceedings of the ASME Energy Sustainability Conference, San Francisco, CA, Jul. 19–23, 2009, ASME Paper No. ES2009-90387. [CrossRef]
Bansal, N. K., Mathur, R., and Bhandari, M. S., 1993, “Solar Chimney for Enhanced Stack Ventilation,” Build. Environ., 28, pp. 373–377. [CrossRef]
Khedari, J., Boonsri, B., and Hirunlabh, J., 2000, “Ventilation Impact of a Solar Chimney on Indoor Temperature Fluctuation and Air Change in a School Building,” Energy Build., 32, pp. 89–93. [CrossRef]
Hirunlabh, J., Kongduang, W., Namprakai, P., and Khedari, J., 1999, “Study of Natural Ventilation of Houses by a Metallic Solar Wall Under Tropical Climate,” Renewable Energy, 18, pp. 109–119. [CrossRef]
Duffie, J. A., and Beckman, W. A., 2006, Solar Engineering of Thermal Processes, 3rd ed., John Wiley & Sons, New York.
ASHRAE, 2009, 2009 ASHRAE Handbook of Fundamentals, ASHRAE, Atlanta, GA, Chap. 16.
Hollands, K. G. T., Unny, T. E., Raithby, G. D., and Konicek, L., 1976, “Free Convection Heat Transfer Across Inclined Air Layers,” Trans. ASME J. Heat Transfer, 98, p. 189. [CrossRef]
Fujii, T., and Imura, H., 1972, “Natural–Convection Heat Transfer from a Plate With Arbitrary Inclination,” Int. J. Heat Mass Transfer, 15, p. 755. [CrossRef]

Figures

Grahic Jump Location
Fig. 2

Schematics radiative energy transfer in a solar chimney

Grahic Jump Location
Fig. 1

Schematic of an inclined solar chimney

Grahic Jump Location
Fig. 5

Absorbing plate and glass temperatures temperature versus solar flux for a 60 deg slope and 0.1 m air gap chimney

Grahic Jump Location
Fig. 3

Overall flow chart of the calculation model

Grahic Jump Location
Fig. 4

Airflow rate convergence

Grahic Jump Location
Fig. 6

Volume flow rate for 2 m height and 60 deg slope

Grahic Jump Location
Fig. 7

Airflow rate for 2 m height and 45 deg slope

Grahic Jump Location
Fig. 8

Airflow rate for 2 m height and 30 deg slope

Grahic Jump Location
Fig. 9

Velocity vectors colored by velocity magnitude in m/s for a chimney design of 60 deg slope and thickness of 0.1 m

Grahic Jump Location
Fig. 10

Velocity vectors colored by velocity magnitude in m/s for a chimney design of 60 deg slope and 0.2 m thick

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In