Commenced in January 2007
Paper Count: 31108
The Experimental and Numerical Analysis of a Lightpipe using a Simulation Software
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.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1078889Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1258
 C. L. Robbins, "Daylighting Design & Analysis," Ed. New York: Van Nostrand Reinhold Company, 1986.
 G. Oaklay, S.B. Riffat, L. Shao, "Daylight performance of lightpipes," Solar Energy 69.
 M. Paroncini, F. Corvaro, G. Nardini, S. Pistolesi "The performance analysis of three lightpipes using a simulation software," International workshop and 7th Annex 45 Expert Meeting.,2008.
 Lawrence Berkeley National Laboratory Environmental Energy Technologies Division Building Technologies Department: Desktop Radiance 2.0 beta User Manual, 2000.
 M. Paroncini, B. Calcagni, , "Performance of a Light Capturing System to Transport and Improve Natural Light Within Buildings", LuxEuropa 2005, Berlin.