In this paper, a natural lighting system composed of a tilted prismatic daylight collector, an outdoor reflector and an indoor diffuse reflector is described. The light emerging from the hypotenuse of the prismatic daylight collector is redirected onto the indoor reflector for natural light illumination. The results of measured illuminances are in agreement with the results of calculation. The prismatic daylight collector not only decreases discomfort glare but also collects daylight for the natural lighting system. The open natural lighting system, which uses less material, can be realized by the detailed analysis of the characteristics of the light emerging from the hypotenuse of the prismatic daylight collector for sunlight incident on the collector.
Get full access to this article
View all access options for this article.
References
1.
ChirarattananonSChaiwiwatworakulPPattanasethanonS. Daylight availability and models for global and diffuse horizontal illuminance and irradiance for Bangkok. Renewable Energy2002; 26: 69–89.
2.
KrartiMEricksonPMHillmanTC. A simplified method to estimate energy savings of artificial lighting use from daylighting. Building and Environment2005; 40: 747–754.
3.
ChelATiwariGNChandraA. A model for estimation of daylight factor for skylight: an experimental validation using pyramid shape skylight over vault roof mud-house in New Delhi (India). Applied Energy2009; 86: 2507–2519.
4.
RuckNC. International Energy Agency’s solar heating and cooling task 31 – daylighting buildings in the 21st century. Energy and Buildings2006; 38: 718–720.
5.
KimJTJimG. Overview and new developments in optical daylighting systems for building a healthy indoor environment. Building and Environment2010; 45: 256–269.
6.
CheungHDChungTM. A study on subjective preference to daylight residential indoor environment using conjoint analysis. Building and Environment2008; 43: 2101–2111.
7.
WittkopfSGrobeLOGeisler-MoroderDCompagnonRKämpfJLinhartFScartezziniJL. Ray tracing study for non-imaging daylight collectors. Solar Energy2010; 84: 986–996.
8.
RosemannAKaaseH. Light applications for daylighting systems. Solar Energy2005; 78: 772–780.
9.
RosemannAMossmanMWhiteheadL. Development of a cost-effective solar illumination system to bring natural light into the building core. Solar Energy2008; 82: 302–310.
10.
CarterDJ. The measured and predicted performance of passive solar light pipe systems. Lighting Research Technology2002; 33: 39–52.
11.
JenkinsDMuneerT. Modeling light pipe performances – a natural daylighting solution. Building and Environment2003; 38: 965–972.
WittkopfSK. Daylight performance of anidolic ceiling under different sky conditions. Solar Energy2007; 81: 151–161.
14.
LinhartFScartezziniJL. Minimizing lighting power density in office rooms equipped with anidolic daylighting systems. Solar Energy2010; 84: 587–595.
15.
TsangrassoulisADoulosLSantamourisMFontoynontMMaamariFWilsonMJacobsASolomonJZimmermanAPohlWMihalakakouG. On the energy efficiency of a prototype hybrid daylighting system. Solar Energy2005; 79: 56–64.
16.
PageJScartezziniJLKaempfJMorelN. On-site performance of electrochromic glazing coupled to anidolic daylighting system. Solar Energy2007; 81: 1166–1179.
17.
ChowTTQiuZLiC. Potential application of see-through solar cells in ventilated glazing in Hong Kong. Solar Energy Materials and Solar Cells2009; 93: 230–238.
18.
AthienitisAKTzempelikosA. A methodology for simulation of daylight room illuminance distribution and light dimming for a room with a controlled shading device. Solar Energy2002; 72: 271–281.
19.
YehSCWhangAJHsiaoHCHuXDChenYY. Distribution of emerged energy for daylight illuminate on prismatic elements. Journal of Solar Energy Engineering2011; 133: 021007–021007.
20.
MohelnikovaJ. Tubular light guide evaluation. Building and Environment2009; 44: 965–972.
21.
WittkopfSGrobeLOMoroderDGCompagnonRKampfJLinhartFScartezziniJL. Ray tracing study for non-imaging daylight collectors. Solar Energy2010; 84: 986–996.
22.
LowryGThomasS. Spreadsheet-based calculation tool for direct daylight illuminance adaptable for different glazing properties and sky models. Building and Environment2010; 45: 1081–1086.
23.
SekeraZ. Light scattering in the atmosphere and the polarization of sky light. Journal of the Optical Society of America1957; 47: 484–490.
24.
BoescheEStammesPRuhtzTPreuskerRFischerJ. Effect of aerosol microphysical properties on polarization of skylight: sensitivity study and measurements. Applied Optics2006; 45: 8790–8805.
