Heat Loss Measurement and Analyses of Solar Parabolic Trough Receiver

Abstract:

The heat loss of vacuum receiver plays critical important role in solar parabolic trough system. In this paper, experimental measurements and calculation models were conducted to investigate the heat loss of solar parabolic trough receiver with receiver length of 10.2 m and diameter of 0.120 m. In general, the heat loss of receiver decreased with the receiver wall temperature, while it can approach minimum under special wind condition. The heat loss of receiver mainly included the heat loss of glass and boundary region, and the heat losses of receiver, glass region and boundary region with tube temperatures of 176.2oC were respectively 987.1 W, 762.2 W and 224.9 W. Outside the glass envelope, the convection and radiation both play an important role in the heat loss of receiver, while the heat transfer is mainly dependent upon the radiation inside the glass envelope. In addition, the heat losses of convection outside the glass and radiation inside the glass from calculation very well agreed with the experimental data.

• Periodical: Applied Mechanics and Materials (Volumes 291-294)
• Pages: 127-131
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.291-294.127
• Online since: February 2013
• Authors: Jian Feng Lu, Jing Ding, Jian Ping Yang, Kang Wang
• Keywords: Heat Loss, Solar Parabolic Trough System, Vacuum Receiver, Wind

References

[1] F. Pharabod, C. Philibert. Luz solar power plants. Success in California and worldwide prospects. Tech. Rep. DLR for IEA-SSPS. SolarPACES; (1991).

[2] F. Trieb, J. Nitsch. Recommendations for the market introduction of solar thermal power stations. Renewable Energy, 1998, 14: 17-22.

DOI: 10.1016/s0960-1481(98)00041-x

[3] V. Dudley, Kolb G, Sloan M, Kearney D. SEGS LS2 Solar Collector-Test Results. Report of Sandia National Laboratories. SAN94-1884, (1994).

DOI: 10.2172/70756

[4] A. Ratzel, C. Hickox, D. Gartling. Techniques for reducing thermal conduction and natural convection heat losses in annular receiver geometries. J Heat Trans Trans ASME, 1979, 101: 108–13.

DOI: 10.1115/1.3450899

[5] C.E. Kennedy. Review of mid- to high-temperature solar selective absorber materials. NREL/TP-520-31267, (2002).

[6] M.W. Edenburn. Performance analysis of a cylindrical parabolic focusing collector and comparison with experimental results. Solar Energy, 1976; 18(5): 437-44.

DOI: 10.1016/0038-092x(76)90010-4

[7] R. Forristall. National Renewable Energy Laboratory, Golden, Colorado, 2003, pp.5-16.

[8] T. Stuetzle. Automatic Control of the 30 MWe SEGS VI Parabolic Trough Plant. Master thesis. University of Wisconsin-Madison, College of Engineering; (2002).

DOI: 10.1016/j.solener.2003.01.002

[9] J.H. Lienhard IV, J.H. Lienhard, V. A Heat Transfer Textbook. Phlogiston Press, Cambridge, Massachusetts, U.S. A, (2002).

[10] R.V. Padilla, G. Demirkaya, D.Y. Goswami, E. Stefanakos, M.M. Rahman. Heat transfer analysis of parabolic trough solar receiver. Applied Energy, 2011, 88: 5097–5110.

DOI: 10.1016/j.apenergy.2011.07.012