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The Experimental and Numerical Analysis of a Lightpipe using a Simulation Software

By M. Paroncini, F. Corvaro, G. Nardini and S. Pistolesi

Abstract

Abstract—A lightpipe is an about 99 percent specular reflective mirror pipe or duct that is used for the transmission of the daylight from the outside into a building. The lightpipes are usually used in the daylighting buildings, in the residential, industrial and commercial sectors. This paper is about the performances of a lightpipe installed in a laboratory (3 m x 2.6 m x 3 m) without windows. The aim is to analyse the luminous intensity distribution for several sky/sun conditions. The lightpipe was monitored during the year 2006. The lightpipe is 1 m long and the diameter of the top collector and of the internal diffuser device is 0.25 m. In the laboratory there are seven illuminance sensors: one external is located on the roof of the laboratory and six internal sensors are connected to a data acquisition system. The internal sensors are positioned under the internal diffusive device at an height of 0.85 m from the floor to simulate a working plane. The numerical data are obtained through a simulation software. This paper shows the comparison between the experimental and numerical results concerning the behavior of the lightpipe. Keywords—Daylighting, Desktop Radiance, Lightpipe. I

Year: 2013
OAI identifier: oai:CiteSeerX.psu:10.1.1.306.5981
Provided by: CiteSeerX
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