论文信息 - Comparison of optical performances of sea-shell trough solar concentrators

Comparison of optical performances of sea-shell trough solar concentrators

Abstract An investigated sea-shell solar concentrator is non-imaging, asymmetric, stationary and has long trough. This concentrator consists of a parabolic, cylindrical trough reflector, a flat double-sided flat absorber (for heat production), and a flat aperture. Three concentrators of such design were investigated by specular solar ray tracing with the software CATIA. They differ in the location of the absorber inside the concentrator. The optical efficiency of direct solar ray transfer inside these concentrators was investigated for different solar ray altitudes at the concentrator aperture for the concentrators installed in Kragujevac, Serbia. For the solar ray altitudes between 50° and 69.75°, the highest optical efficiency was obtained at the solar concentrator where the absorber contains the focus line of the parabola reflector. For the solar ray altitudes between 21° and 50°, the highest optical efficiency was obtained by the solar concentrator where the absorber contains the vertex line of the parabola reflector.

[1] A. Kribus,et al. Optical assessment of nonimaging concentrators. , 2000, Applied optics.

[2] Tapas K. Mallick,et al. Enhancing the performance of building integrated photovoltaics , 2011 .

[3] A. Harmim,et al. Mathematical modeling of a box-type solar cooker employing an asymmetric compound parabolic concentrator , 2012 .

[4] Ralf Leutz,et al. Micro-structured reflector surfaces for a stationary asymmetric parabolic solar concentrator , 2007 .

[5] C. E. Kennedy,et al. Optical Durability of Candidate Solar Reflectors , 2005 .

[6] Tapas K. Mallick,et al. Non-concentrating and asymmetric compound parabolic concentrating building façade integrated photovoltaics: An experimental comparison , 2006 .

[7] Björn Karlsson,et al. Analysis of the effects of outdoor and accelerated ageing on the optical properties of reflector materials for solar energy applications , 2004 .

[8] W. Beckman,et al. Solar Engineering of Thermal Processes , 1985 .

[9] Ari Rabl,et al. Solar concentrators with maximal concentration for cylindrical absorbers. , 1976, Applied optics.

[10] Björn Karlsson,et al. The impact of high latitudes on the optical design of solar systems , 1996 .

[11] Björn Karlsson,et al. Optical properties, durability, and system aspects of a new aluminium-polymer-laminated steel reflector for solar concentrators , 2004 .