Conceptual design and assessment of a profiled Fresnel lens daylight collector

Abstract

This paper describes design of daylight collectors using multiple Fresnel lenses, each facing the sun for a particular period of time in a day. The influence of solar movement on flat Fresnel lens was studied. The influence of groove density of the lens was also determined by which the suitable Fresnel lens was selected. Passive and profiled north-facing and south-facing collectors with multi-lens system have been designed based on the solar altitude and azimuth angle of a geographical location. Performance of the north-and south-facing collector at different times of a day with an acrylic dome indicated better efficiency and uniformity of lighting throughout the day time for the proposed profiled Fresnel collectors.

A Review of Daylighting System: For Prototype Systems Performance and Development

“…In order to attain more effective use of dynamic daylight, stable optical components and active devices of the daylighting system were studied. Common optical components are high-reflectivity light pipes [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], Fresnel lens [32][33][34][35][36][37][38][39][40][41][42][43][44], linear Fresnel lens [45][46][47], optical fiber with different materials [32], light guide [39], parabolic concentrator [48][49][50], Compound Parabolic Concentrator (CPC) [38,47,51,52], dish concentrator [1,53], cold mirror [48], IR filer [32,38], hot mirror [49] and prism structure ...…”

“…The prototype daylighting system is divided into two parts: light collection and light transmission. The novel optical design principles are divided into three categories: collection [33,100,[111][112][113][114][115], transmission [99] and collection with transmission [32,[38][39][40]44,47,49,52,56,96,103,106,116] (Table 8).…”

“…The module's optical efficiency is up to 78.68% and the maximum deviation is allowed to be 1 degree, and it relies on a two-stage concentrating module and dynamic tracking system to complete. MG Nair et al [33] designed a profiled solar concentrator based on Fresnel lens. The difference is that not having a tracking mechanism, but rather, directly calculating the influence of the solar position on the Fresnel lens.…”

Methods for the illumination of multilevel buildings with vertical light pipes

“…Current research on DGS includes the following areas: new designs (Garcia-Hansen, 2006;Rosemann et al, 2008;Baroncini et al, 2010) and design optimization (GarciaHansen, 2006;Garcia-Hansen et al, 2009;Robertson et al, 2010;Nair et al, 2014); performance monitoring (Paoncini et al, 2007), prediction models (CIE, 2006;Lo Verso et al, 2011), simulation (Dutton and Shao, 2007;Kwok and Chung, 2008;Kocifaj, 2009) and comparative studies (Oh et al, 2013); monitoring of real building applications and glare analysis (Al Marwaee and Carter, 2006;Isoardi et al, 2012); user attitudes and user perception (Garcia-Hansen et al, 2010;Carter and Al Marwaee, 2009); integration with electrical lighting (hybrid systems) (Mayhoub and Carter, 2010); and finally, cost and life cycle analysis (Carter, 2008;Mayhoub and Carter, 2011).…”

“…Performance monitoring of a simple light pipe over a year demonstrated the variation of performance throughout the day and the year and the need of improved simple daylight collectors (Paroncini et al, 2007). Latest examples to improved designs for daylight collectors for light pipes include shaped rods and Fresnel lenses (Ferró n et al, 2011;Nair et al, 2014).…”