A Compressible Transient Model of the Solar Chimney and Heat Collector

Abstract:

The compressible transient model of solar chimney power plant system was proposed. It was added to the pressure equation and the ideal gas state equation basis on the heat balance equation for the solar collector model. The air flow station can be easily calculated with the improved model. The results of dynamic changes of the total pressure difference calculated in the model were in good agreement with the given actual measured values in references. The solar chimney model was considered the influence of fluid pressure on the density. The influence of the structural chimney on the chimney efficiency was analyzed with the established model. It was shown that the chimney efficiency changes significantly with the chimney height and its diameter. The chimney efficiency was decreased with a convergent chimney shape while increased with the divergent one. When the tilt angle of chimney reached a peak and then further increased, the chimney efficiency was the constant. These results will provide the important reference to improving the system efficiency.

• Periodical: Applied Mechanics and Materials (Volume 283)
• Pages: 15-21
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.283.15
• Online since: January 2013
• Authors: Gang Li, Hui Lan Huang, Hua Zhang, Jian Bin Liu, Xiang Chen
• Keywords: Efficiency, Pressure, Solar Chimney, Solar Collector, Transient Model

References

[1] W. Schiel, J. Schlaich: The solar chimney: electricity from the sun. Schlaich Eergermann und Partner, Germany: Stuttgart, Axel Menges, (1995), pp.245-267.

[2] E.P. Sakonidou, T.D. Karapantsios, A.I. Balouktsis, D. Chassapis: Modeling of the optimum tilt of a solar chimney for maximum air flow. Solar Energy, Vol. 82(1) (2008), pp.80-94.

DOI: 10.1016/j.solener.2007.03.001

[3] T.W. Von Backström, A.J. Gannon: Solar chimney turbine characteristics. Solar Energy, Vol. 76(2004), pp.235-241.

DOI: 10.1016/j.solener.2003.08.009

[4] T.P. Fluri, T.W. Von Backström: Comparison of modeling approaches and layouts for solar chimney turbines. Solar Energy, Vol. 82(3) (2008), pp.239-246.

DOI: 10.1016/j.solener.2007.07.006

[5] W. Haaf: Solar chimneys: Part II, Preliminary test results from the Manzanares pilot plant. Int. J. of solar Energy, Vol. 2(1984), pp.141-161.

DOI: 10.1080/01425918408909921

[6] M.A. dos S. Bernardes, A. Voß, G. Weinrebe: Thermal and technical analyses of solar chimneys. Solar Energy, Vol. 75(2005), pp.511-524.

DOI: 10.1016/j.solener.2003.09.012

[7] N. Pasumarthi, S.A. Sherif: Experimental and theoretical performance of a demonstration solar chimney model - Part I: Mathematical model development. International Journal of Energy Research, Vol. 22(1998), pp.277-288.

DOI: 10.1002/(sici)1099-114x(19980310)22:3<277::aid-er380>3.3.co;2-i

[8] L.B. Mullett: The solar chimney-overall efficiency, design and performance. Int. J. Ambient Energy, Vol. 8(1) (1987), pp.35-40.

DOI: 10.1080/01430750.1987.9675512

[9] X.P. Zhou., F. W., R. M. Ochieng: A review of solar chimney power technology. Renewable and Sustainable Energy Reviews, Vol. 14 (2010), pp.2315-2338.

DOI: 10.1016/j.rser.2010.04.018

[10] J.P. Pretorius: Optimization and control of a large-scale solar chimney power plant. Department of Mechanical Engineering, University of Stellenbosch, Ph. D, South Africa: Stellenbosch, (2006).

[11] X.S. Ge, H. Ye: Solar chimney electric generating system and analysis of its intrinsic thermodynamic defect. Acta Energiae Solaris Sinica, Vol. 25(2) (2004), pp.263-268.

[12] M.A.K. Lodhi: Application of helio-aero-gravity concept in producing energy and suppressing pollution. Energy Conservation & Management, Vol. 3(1999), pp.407-421.

DOI: 10.1016/s0196-8904(98)00104-6