RT Book, Section
T1 Skylight: a hollow prismatic CPC
A1 García Fernández, Berta
A1 García Botella, Angel
A1 Álvarez Fernández-Balbuena, Antonio
A1 Vázquez Molini, Daniel
A1 Bernabéu Martínez, Eusebio
A2 Winston, Roland
A2 Gordon, Jeffrey M.
AB Many applications involve the use of a compound parabolic concentrator (CPC) like, natural lighting, thermal applications, optics for illuminators, optical fibre coupling and solar energy. The use of a CPC in reverse mode for natural lighting gives the chance to use it as a lighting skylight in ceilings because light output is controlled inside the design angle, on the contrary having a low flux transfer ratio because of the reduced area of the entrance pupil regarding exit pupil. The authors propose an innovative 3D hollow prismatic CPC (HPCPC) made of a dielectric material, which has a high efficiency comparing it with aluminium CPC. The basic idea is to use a hollow prismatic light guide with CPC shape. This paper reports 2D, 3D design and numerical analysis by raytracing software, also experimental results are shown. The system works almost like a true CPC when light enters through standard entrance pupil and also collect light that enters outside entrance pupil. Performance and efficiency of the prismatic CPC is in average 300% higher than standard aluminium CPC for collimated light in a range from 0º to 85º. A prototype has been developed and tested.
PB SPIE
SN 0277-786X
YR 2009
FD 2009-08-21
LK https://hdl.handle.net/20.500.14352/101327
UL https://hdl.handle.net/20.500.14352/101327
LA eng
NO Fernandez-Balbuena, A. A., Vázquez-Moliní, D., Garcia-Fernandez, B., Garcia-Botella, A., & Bernabeu, E. (2009, August). Skylight: a hollow prismatic CPC. In Nonimaging Optics: Efficient Design for Illumination and Solar Concentration VI (Vol. 7423, pp. 239-250). SPIE.
NO Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States.© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE).
DS Docta Complutense
RD 23 jul 2024