Design of Solar Transmission System using Fiber Optic for Indoor Lighting

Abstract

Transmission of fiber solar lighting system is a lighting system using sunlight as a source. The system consists of two main components, there are: solar collectors and optical fiber. Solar collector is used to collect and focus sunlight into the focal point. Sunlight that received by collector is transmitted by optical fiber into the room, primarily through efficiency of the collector system. In this final project, we designed the transmission systems via optical fiber for lighting on the Photonics Laboratory ITS. Transmission of solar lighting systems used parabolic collector as a major collector and end glow plastic optical fiber as the transmission with length of 50m. There are four types of collector systems were designed, i.e. parabolic, parabolic with flat mirrors, parabolic with pyramid and parabolic with a cone. Characterization system consists of measuring reflectance values, the output intensity of the optical fiber, and the intensity light distribution in the room. The results of measurements of the reflectance (R) collector surface with paint gray and silver are 0.225 and 0.475, respectively. In the measurement light output intensity of the optical fiber with variation types of collector systems, it is obtained that the highest value from the combination of parabolic collector with a cone. Distribution of light output from the optical fiber in the room was also calculated and measured.Keywords: collector; optical fiber; solar lighting Main textThe world's energy needs from year to year increase exponentially . It is estimated that in 2035 increased by nearly four times the energy needs in 2010 . Approximately 24 % of the total energy used by buildings , and 35.8 % of the energy used in buildings for lighting systems [1] . Therefore , we need a system that can reduce lighting energy consumption in buildings , particularly through the use of renewable energy , namely solar energy instead of conventional energy .Some research to reduce energy consumption on lighting with solar energy has been done , for example by using a glass roof , and modify the window . But the lighting solution in a way that has aspects of accumulated heat from the light source of the sun and lead to an increase in the room temperature [2] . Another solution offered is to use solar lighting . Research on solar lighting using optical fibers has been started since 1982 , namely research on parabolic collectors , as the light receiver . Until now it has developed many other studies including those by Mahya in 2007 , namely the manufacture of prototype solar hybrid lighting the sunlight through fiber optics with LED lights, the prototype ribbed 50 cm cube . This thesis explores about how to obtain a sufficient efficiency of the transmission of solar lighting system for indoor lighting . This study is part of a hybrid solar lighting systems